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peroxidase</title> <meta name="description" content="Search results for: thyroid peroxidase"> <meta name="keywords" content="thyroid peroxidase"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="thyroid peroxidase"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 280</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: thyroid peroxidase</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">280</span> Functional Analysis of Thyroid Peroxidase (TPO) Gene Mutations Detected in Patients with Thyroid Dyshormonogenesis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Biswabandhu%20Bankura">Biswabandhu Bankura</a>, <a href="https://publications.waset.org/abstracts/search?q=Srikanta%20Guria"> Srikanta Guria</a>, <a href="https://publications.waset.org/abstracts/search?q=Madhusudan%20Das"> Madhusudan Das</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Purpose: Thyroid peroxidase (TPO) is the key enzyme in the biosynthesis of thyroid hormones. We aimed to identify the spectrum of mutations in the TPO gene leading to hypothyroidism in the population of West Bengal to establish the genetic etiology of the disease. Methods: 200 hypothyroid patients (case) and their corresponding sex and age matched 200 normal individuals (control) were screened depending on their clinical manifestations. Genomic DNA was isolated from peripheral blood samples and TPO gene (Exon 7 to Exon 14) was amplified by PCR. The PCR products were subjected to sequencing to identify mutations. Results: Single nucleotide changes such as Glu 641 Lys, Asp 668 Asn, Thr 725 Pro, Asp 620 Asn, Ser 398 Thr, and Ala 373 Ser were found. Changes in the TPO were assayed in vitro to compare mutant and wild-type activities. Five mutants were enzymatically inactive in the guaiacol and iodide assays. This is a strong indication that the mutations are present at crucial positions of the TPO gene, resulting in inactivated TPO. Key Findings: The results of this study may help to develop a genetic screening protocol for goiter and hypothyroidism in the population of West Bengal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20peroxidase" title="thyroid peroxidase">thyroid peroxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=hypothyroidism" title=" hypothyroidism"> hypothyroidism</a>, <a href="https://publications.waset.org/abstracts/search?q=mutation" title=" mutation"> mutation</a>, <a href="https://publications.waset.org/abstracts/search?q=in%20vitro%20assay" title=" in vitro assay"> in vitro assay</a>, <a href="https://publications.waset.org/abstracts/search?q=transfection" title=" transfection"> transfection</a> </p> <a href="https://publications.waset.org/abstracts/20470/functional-analysis-of-thyroid-peroxidase-tpo-gene-mutations-detected-in-patients-with-thyroid-dyshormonogenesis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20470.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">345</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">279</span> Functional Analysis of Thyroid Peroxidase Gene Mutations Detected in Patients with Thyroid Dyshormonogenesis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Biswabandhu%20Bankura">Biswabandhu Bankura</a>, <a href="https://publications.waset.org/abstracts/search?q=Srikanta%20Guria"> Srikanta Guria</a>, <a href="https://publications.waset.org/abstracts/search?q=Madhusudan%20Das"> Madhusudan Das</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Purpose: Thyroid peroxidase (TPO) is the key enzyme in the biosynthesis of thyroid hormones. We aimed to identify the spectrum of mutations in the TPO gene leading to hypothyroidism in the population of West Bengal to establish the genetic etiology of the disease. Methods: 200 hypothyroid patients (case) and their corresponding sex and age matched 200 normal individuals (control) were screened depending on their clinical manifestations. Genomic DNA was isolated from peripheral blood samples and TPO gene (Exon 7 to Exon 14) was amplified by PCR. The PCR products were subjected to sequencing to identify mutations. Results: Single nucleotide changes such as Glu 641 Lys, Asp 668 Asn, Thr 725 Pro, Asp 620 Asn, Ser 398 Thr, and Ala 373 Ser were found. Changes in the TPO were assayed in vitro to compare mutant and wild-type activities. Five mutants were enzymatically inactive in the guaiacol and iodide assays. This is a strong indication that the mutations are present at crucial positions of the TPO gene, resulting in inactivated TPO. Key Findings: The results of this study may help to develop a genetic screening protocol for goiter and hypothyroidism in the population of West Bengal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20peroxidase" title="thyroid peroxidase">thyroid peroxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=hypothyroidism" title=" hypothyroidism"> hypothyroidism</a>, <a href="https://publications.waset.org/abstracts/search?q=mutation" title=" mutation"> mutation</a>, <a href="https://publications.waset.org/abstracts/search?q=in%20vitro%20assay" title=" in vitro assay"> in vitro assay</a>, <a href="https://publications.waset.org/abstracts/search?q=transfection" title=" transfection"> transfection</a> </p> <a href="https://publications.waset.org/abstracts/19059/functional-analysis-of-thyroid-peroxidase-gene-mutations-detected-in-patients-with-thyroid-dyshormonogenesis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19059.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">334</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">278</span> Evaluation of Existence of Antithyroid Antibodies, Anti-Thyroid Peroxidase and Anti-Thyroglobulin in Patients with Hepatitis C Viral Infections</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Junaid%20Mahmood%20Alam">Junaid Mahmood Alam</a>, <a href="https://publications.waset.org/abstracts/search?q=Sana%20Anwar"> Sana Anwar</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarah%20Sughra%20Asghar"> Sarah Sughra Asghar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chronic hepatitis or Hepatitis C viral (HCV) infection has been identified as one of the factors that could elicit autoimmune disease resulting in the development of auto-antibodies. Furthermore, HCV is implicated in contravening of forbearance to antigens, therefore, inciting auto-reactivity. In this regard, several near and past studies noted the prevalence of thyroid dysfunction and production of anti-thyroid antibodies (ATAb) such as anti-thyroid peroxidase (AntiTPO) and anti-thyroglobulin (AntiTG) in patients with HCV. Likewise, one of the etiologies of augmentation of thyroid disease is basically interferon therapy for HCV infections, for which a number of autoimmune diseases have been noted including Grave’s disease, Hishimoto thyroiditis. A prospectively case-control study was therefore carried out at department of clinical biochemistry lab services and chemical pathology in collaboration with department of clinical microbiology, at Liaquat National Hospital and Medical College, Karachi Pakistan for the period January 2015 to December 2017. Two control groups were inducted for comparison purpose, control group 1 = without HCV infection and with thyroid disorders (n = 20), control group 2 = with HCV infection and without thyroid disorders (n = 20), whereas HCV infected were n = 40 where more than half were noted to be positive for either of HCV IgG and Ag. In HCV group, patients with existing sub-clinical hypothyroidism and clinical hyperthyroidism were less than 5%. Analysis showed the presence of AntiTG in 12 HCV patients (30%), AntiTPO in 15 (37.5%) and both AntiTG and antiTPO in 10 patients (25%). Only 3 patients were found with the history of anti-thyroid auto-antibodies (7.5%) and one with parents and relatives with auto-immune disorders (2.5%). Patients that remained untreated were 12 (30%), under treatment 18 (45%) and with complete-course of treatment 10 (25%). As per review of the literature, meta-analysis of evident data and cross-sectional studies of selective cohorts (as studied in presented research), thyroid connection is designated as one of the most recurrent endocrine ailment associated with chronic HCV infection. Moreover, it also represents an extrahepatic disease in the continuum of HCV syndrome. In conclusion, HCV patients were more likely to encompass thyroid disorders especially related to development of either of ATAb or both antiTG and AntiTPO. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hepatitis%20C%20viral%20%28HCV%29%20infection" title="Hepatitis C viral (HCV) infection">Hepatitis C viral (HCV) infection</a>, <a href="https://publications.waset.org/abstracts/search?q=anti-thyroid%20antibodies" title=" anti-thyroid antibodies"> anti-thyroid antibodies</a>, <a href="https://publications.waset.org/abstracts/search?q=anti-thyroid%20peroxidase%20antibodies" title=" anti-thyroid peroxidase antibodies"> anti-thyroid peroxidase antibodies</a>, <a href="https://publications.waset.org/abstracts/search?q=anti-thyroglobulin%20antibodies" title=" anti-thyroglobulin antibodies"> anti-thyroglobulin antibodies</a> </p> <a href="https://publications.waset.org/abstracts/89246/evaluation-of-existence-of-antithyroid-antibodies-anti-thyroid-peroxidase-and-anti-thyroglobulin-in-patients-with-hepatitis-c-viral-infections" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89246.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">157</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">277</span> Prevalence of Autoimmune Thyroid Disease in Recurrent Aphthous Stomatitis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arghavan%20Tonkaboni">Arghavan Tonkaboni</a>, <a href="https://publications.waset.org/abstracts/search?q=Shamsolmolouk%20Najafi"> Shamsolmolouk Najafi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohmmad%20Taghi%20Kiani"> Mohmmad Taghi Kiani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehrzad%20Gholampour"> Mehrzad Gholampour</a>, <a href="https://publications.waset.org/abstracts/search?q=Touraj%20Goli"> Touraj Goli</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Recurrent aphthous stomatitis (RAS) is a multifactorial recurrent oral lesion; which is an autoimmune disease. TH1 cytokines are the most important etiological factors. Autoimmune thyroid disease (ATD) is one of the most common autoimmune diseases and generally coexists with other autoimmune diseases. This study assessed the prevalence of thyroid disease in patients with recurrent aphthous stomatitis. Materials and Methods: This case control study assessed 100 known RAS patients who were diagnosed clinically by oral medicine specialists; venous blood samples were analyzed for thyroid stimulating hormone (TSH), free triiodothyronine (fT3), total thyroxine (fT4), thyroglobulin, anti-thyroid peroxidase antibody (anti-TPO) and anti-thyroglobulin antibody (anti-TG) levels. Results: Fifty patients with RAS aged between 18-42 years (28.5±5.8) and 50 healthy volunteers aged 19-45 years (27.3±5.4) participated. In RAS patients, fT3 and TSH levels were significantly higher (P=0.031, P=0.706); however, fT4 level was lower in the RAS group (P=0.447). Anti TG and anti-TPO levels were significantly higher in the RAS group (P=0.008, P=0.067). Conclusion: Our study showed that ATD prevalence was significantly higher in RAS patients. Based on this study, we recommend assessment of thyroid hormones and antibodies in RAS patients. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=recurrent%20aphthous%20stomatitis" title="recurrent aphthous stomatitis">recurrent aphthous stomatitis</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20antibodies" title=" thyroid antibodies"> thyroid antibodies</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20hormone" title=" thyroid hormone"> thyroid hormone</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20autoimmune%20disease" title=" thyroid autoimmune disease"> thyroid autoimmune disease</a> </p> <a href="https://publications.waset.org/abstracts/41767/prevalence-of-autoimmune-thyroid-disease-in-recurrent-aphthous-stomatitis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41767.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">342</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">276</span> Prevalence of Thyroid Disorders in Pregnancy in Northern Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samira%20Akdader-Oudahmane">Samira Akdader-Oudahmane</a>, <a href="https://publications.waset.org/abstracts/search?q=Assia%20Kamel"> Assia Kamel</a>, <a href="https://publications.waset.org/abstracts/search?q=Lynda%20Lakabi"> Lynda Lakabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Michael%20Bruce%20Zimmermann"> Michael Bruce Zimmermann</a>, <a href="https://publications.waset.org/abstracts/search?q=Zohra%20Hamouli-Said"> Zohra Hamouli-Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Djamila%20Meskine"> Djamila Meskine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Iodine is a trace element whose adequate intakes are essential during pregnancy to promote the correct growth and development of the fetus. Iodine deficiency is the cause of several disorders in foetal development, and thyroid disorders during pregnancy are associated with an increased risk of miscarriage or premature birth. The aim of this study was to assess the iodine status and thyroid function of pregnant women (PW) in northern Algeria. Methods: Healthy PW were recruited from an urban area (Algiers). Spot urine and venous blood samples were collected to assess iodine status (urinary iodine concentration, UIC) and serum thyroid hormones (TSH, FT4), and anti-thyroid peroxidase antibodies (TPO-Ab) concentrations. Results: The median UIC for the PW (n=172) in Algiers was 246,74µg/L, 244,68 µg/L, and 220,63µg/L, respectively, during the first, second, and third trimesters of pregnancy. Mean TSH and FT4 concentrations were within reference ranges in all groups of women. Among PW, 72.7%, 75.4%, and 75.5% in the first, second and third trimester were TPO-Ab+. Among PW, 14%, 10%, and 10% in the first, second and third trimester, respectively, with TPO -Ab+ had subclinical hypothyroidism. An analysis of the variations in the levels of the serum parameters (FT4, TSH and anti-TPO antibodies) was analyzed according to the UIC intervals admitted and show that these marker are predictive of thyroid function. Conclusion: In northern Algeria, median UICs indicate iodine sufficiency in PW. About 75% of PW are TPO-Ab+ and the prevalence of subclinical hypothyroidism is high. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid" title="thyroid">thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=pregnant%20woman" title=" pregnant woman"> pregnant woman</a>, <a href="https://publications.waset.org/abstracts/search?q=urinary%20iodine" title=" urinary iodine"> urinary iodine</a>, <a href="https://publications.waset.org/abstracts/search?q=subclinical%20hypothyroidism" title=" subclinical hypothyroidism"> subclinical hypothyroidism</a> </p> <a href="https://publications.waset.org/abstracts/166232/prevalence-of-thyroid-disorders-in-pregnancy-in-northern-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166232.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">78</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">275</span> The Differences of Vascular Endothelial Growth Factor Levels in Serum to Determine Follicular Adenoma and Follicular Carcinoma of Thyroid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tery%20Nehemia%20Nugraha%20Joseph">Tery Nehemia Nugraha Joseph</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20D.%20P.%20Wisnubroto"> J. D. P. Wisnubroto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thyroid cancer is a healthcare problem with high morbidity and mortality. Follicular adenoma and follicular carcinoma are thyroid tumors from the thyroid follicular cells differentiation with a microfollicular pattern that consists of follicular cuboidal cells. vascular endothelial growth factor (VEGF) is a potent and powerful mitogen for endothelial cells and increases vascular permeability. Therefore, due to an increase in thyroid-stimulating hormone (TSH), VEGF production is activated in the thyroid that leads to the end of mitogenic TSH stimulation and initiation of angiogenesis. The differences in VEGF levels in the follicular carcinoma of thyroid tissue with follicular adenoma thyroid can be used as a basis in differentiating the two types of neoplasms. This study aims to analyze VEGF in the serum so that it can be used to differentiate the types of thyroid carcinoma before surgery. This study uses a cross-sectional research design. Samples were carried out by taking serum samples, and the VEGF levels were calculated. Data were analyzed using the Mann-Whitney test. The results found a significant difference between VEGF levels in the follicular carcinoma thyroid group and VEGF levels in the follicular adenoma thyroid group with a value of p = 0.007 (p < 0.05). The results obtained are 560,427 ± 160,506 ng/mL in the type of follicular carcinoma thyroid and 320.943 ± 134.573 ng/mL in the type of follicular adenoma thyroid. VEGF levels between follicular adenoma and follicular carcinoma are different. VEGF levels are higher in follicular carcinoma thyroid than follicular adenoma thyroid. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=follicular%20adenoma%20thyroid" title="follicular adenoma thyroid">follicular adenoma thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=follicular%20carcinoma%20thyroid" title=" follicular carcinoma thyroid"> follicular carcinoma thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid" title=" thyroid"> thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=VEGF" title=" VEGF"> VEGF</a> </p> <a href="https://publications.waset.org/abstracts/136980/the-differences-of-vascular-endothelial-growth-factor-levels-in-serum-to-determine-follicular-adenoma-and-follicular-carcinoma-of-thyroid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/136980.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">274</span> Optimization of Process Parameters for Peroxidase Production by Ensifer Species</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ayodeji%20O.%20Falade">Ayodeji O. Falade</a>, <a href="https://publications.waset.org/abstracts/search?q=Leonard%20V.%20Mabinya"> Leonard V. Mabinya</a>, <a href="https://publications.waset.org/abstracts/search?q=Uchechukwu%20U.%20Nwodo"> Uchechukwu U. Nwodo</a>, <a href="https://publications.waset.org/abstracts/search?q=Anthony%20I.%20Okoh"> Anthony I. Okoh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Given the high utility of peroxidase in several industrial processes, the search for novel microorganisms with enhanced peroxidase production capacity is of keen interest. This study investigated the process conditions for optimum peroxidase production by Ensifer sp, new ligninolytic proteobacteria with peroxidase production potential. Also, some agricultural residues were valorized for peroxidase production under solid state fermentation. Peroxidase production was optimum at an initial medium pH 7, incubation temperature of 30 °C and agitation speed of 100 rpm using alkali lignin fermentation medium supplemented with guaiacol as the most effective inducer and ammonium sulphate as the best inorganic nitrogen. Optimum peroxidase production by Ensifer sp. was attained at 48 h with specific productivity of 12.76 ± 1.09 U mg⁻¹. Interestingly, probable laccase production was observed with optimum specific productivity of 12.76 ± 0.45 U mg⁻¹ at 72 h. The highest peroxidase yield was observed with sawdust as solid substrate under solid state fermentation. In conclusion, Ensifer sp. possesses the capacity for enhanced peroxidase production that can be exploited for various biotechnological applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=catalase-peroxidase" title="catalase-peroxidase">catalase-peroxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=enzyme%20production" title=" enzyme production"> enzyme production</a>, <a href="https://publications.waset.org/abstracts/search?q=peroxidase" title=" peroxidase"> peroxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=polymerase%20chain%20reaction" title=" polymerase chain reaction"> polymerase chain reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=proteobacteria" title=" proteobacteria"> proteobacteria</a> </p> <a href="https://publications.waset.org/abstracts/76806/optimization-of-process-parameters-for-peroxidase-production-by-ensifer-species" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76806.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">307</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">273</span> Enhanced Peroxidase Production by Raoultella Species</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ayodeji%20O.%20Falade">Ayodeji O. Falade</a>, <a href="https://publications.waset.org/abstracts/search?q=Leonard%20V.%20Mabinya"> Leonard V. Mabinya</a>, <a href="https://publications.waset.org/abstracts/search?q=Uchechukwu%20U.%20Nwodo"> Uchechukwu U. Nwodo</a>, <a href="https://publications.waset.org/abstracts/search?q=Anthony%20I.%20Okoh"> Anthony I. Okoh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Given the high-utility of peroxidase, its production in large amount is of utmost importance. Over the years, actinomycetes have been the major peroxidase-producing bacteria. Consequently, other classes of bacteria with peroxidase production potentials are underexplored. This study, therefore, sought to enhance peroxidase production by a Raoultella species, a new ligninolytic proteobacteria strain, by determining the optimum culture conditions (initial pH, incubation temperature and agitation speed) for peroxidase production under submerged fermentation using the classical process of one variable at a time and supplementing the fermentation medium with some lignin model and inorganic nitrogen compounds. Subsequently, the time-course assay was carried out under optimized conditions. Then, some agricultural residues were valorized for peroxidase production under solid state fermentation. Peroxidase production was optimal at initial pH 5, incubation temperature of 35 °C and agitation speed of 150 rpm with guaiacol and ammonium chloride as the best inducer and nitrogen supplement respectively. Peroxidase production by the Raoultella species was optimal at 72 h with specific productivity of 16.48 ± 0.89 U mg⁻¹. A simultaneous production of a non-peroxide dependent extracellular enzyme which suggests probable laccase production was observed with specific productivity of 13.63 ± 0.45 U mg⁻¹ while sawdust gave the best peroxidase yield under solid state fermentation. In conclusion, peroxidase production by the Raoultella species was increased by 3.40-fold. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=enzyme%20production" title="enzyme production">enzyme production</a>, <a href="https://publications.waset.org/abstracts/search?q=ligninolytic%20bacteria" title=" ligninolytic bacteria"> ligninolytic bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=peroxidase" title=" peroxidase"> peroxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=proteobacteria" title=" proteobacteria"> proteobacteria</a> </p> <a href="https://publications.waset.org/abstracts/75251/enhanced-peroxidase-production-by-raoultella-species" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75251.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">271</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">272</span> Thyroid Malignancy Concurrent with Hyperthyroidism: Variations with Thyroid Status and Age</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20J.%20Nawarathna">N. J. Nawarathna</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20R.%20Kmarasinghe"> N. R. Kmarasinghe</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Chandrasekara"> D. Chandrasekara</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20M.%20R.%20S.%20Balasooriya"> B. M. R. S. Balasooriya</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20A.%20A.%20Shaminda"> R. A. A. Shaminda</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20J.%20K.%20Senevirathne"> R. J. K. Senevirathne</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Thyroid malignancy associated with hyperthyroidism is considered rare. Retrospective studies have shown the incidence of thyroid malignancy in hyperthyroid patients to be low (0.7-8.5%). To assess the clinical relevance of this association, thyroid status in a cohort of patients with thyroid malignancy were analyzed. Method: Thyroid malignancies diagnosed histologically in 56 patients, over a 18 month period beginning from April 2013, in a single surgical unit at Teaching Hospital Kandy were included. Preoperative patient details and progression of thyroid status were asessed with Thyroid Stimulating Hormone, free Thyroxin and free Triiodothyronine levels. Results: Amongst 56 patients Papillary carcinoma was diagnosed in 44(78.6%), follicular carcinomas in 7(12.5%) and 5(8.9%) with medullary and anaplastic carcinomas. 12(21.4%) were males and 44(78.6%) were females. 20(35.7%) were less than 40years, 29(51.8%) were between 40 to 59years and 7(12.5%) were above 59years. Cross tabulation of Type of carcinoma with Gender revealed likelihood ratio of 6.908, Significance p = 0.032. Biochemically 12(21.4%) were hyperthyroid. Out of them 5(41.7%) had primary hyperthyroidism and 7(58.3%) had secondary hyperthyroidism. Mean age of euthyroid patients was 43.77years (SD 10.574) and hyperthyroid patients was 53.25years(SD 16.057). Independent Samples Test t is -2.446, two tailed significance p =0.018. When cross tabulate thyroid status with Age group Likelihood Ratio was 9.640, Significance p = 0.008. Conclusion: Papillary carcinoma is seen more among females. Among the patients with thyroid carcinomas, those with biochemically proven hyperthyroidism were more among the older age group than those who were euthyroid. Hence careful evaluation of elderly hyperthyroid patients to select the most suitable therapeutic approach is justified. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=age" title="age">age</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperthyroidism" title=" hyperthyroidism"> hyperthyroidism</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20malignancy" title=" thyroid malignancy"> thyroid malignancy</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20status" title=" thyroid status"> thyroid status</a> </p> <a href="https://publications.waset.org/abstracts/21237/thyroid-malignancy-concurrent-with-hyperthyroidism-variations-with-thyroid-status-and-age" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21237.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">403</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">271</span> Metastatic Papillary Thyroid Carcinoma in Pleural Effusion- A Very Rare Case</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20A.%20Abutalib">Mohammed A. Abutalib</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Papillary thyroid carcinoma (PTC) accounts for the most common type of thyroid cancer, a well-differentiated type. PTC is featured by biologically low-grade and less aggressive tumors with a survival rate of 10 years in most of the diagnosed cases. PTC can be presented with the involvement of cervical lymph nodes in about 50% of the patients, yet the distant spread is very uncommon. Herein, we discussed an early 50-year-old male patient with a history of PTC that presented to the emergency department complaining of shortness of breath and a radiological finding of hydrothorax. Cytologic examination, together with immune-histochemical staining and molecular studies of pleural effusion aspiration, concluded the definitive diagnosis of metastatic papillary thyroid carcinoma in the pleural space. PTC seldom causes metastatic niches in the pleural space, and this is a rare clinical presentation; nevertheless, a differential diagnosis of thyroid metastasis needs to be excluded. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20cancer" title="thyroid cancer">thyroid cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=malignant%20pleural%20effusion" title=" malignant pleural effusion"> malignant pleural effusion</a>, <a href="https://publications.waset.org/abstracts/search?q=cytology%20aspiration" title=" cytology aspiration"> cytology aspiration</a>, <a href="https://publications.waset.org/abstracts/search?q=papillary%20thyroid%20carcinoma" title=" papillary thyroid carcinoma"> papillary thyroid carcinoma</a> </p> <a href="https://publications.waset.org/abstracts/164368/metastatic-papillary-thyroid-carcinoma-in-pleural-effusion-a-very-rare-case" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164368.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">105</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">270</span> Thyroid Hormones and Thyrotropin Status in Nepalese Postmenopausal Women</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Khan">S. A. Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Mishra"> B. Mishra</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20Sherchan"> O. Sherchan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background and Aims: Thyroid disorder is the most common endocrine disorder after diabetes mellitus. Females are more vulnerable to this disease, and old age is an important risk factor. This study was undertaken to investigate the burden of thyroid disorder in Nepalese postmenopausal women. Methods: In the present cross-sectional study, we included 271 post-menopausal women. Three ml of blood was collected following standard protocol after taking the written consent. Serum was separated and analyzed for free T3, free T4, and Thyroid Stimulating Hormone (TSH) by Chemiluminescence Immunoassay (CLIA) method in Snibe Maglumi 1000 analyzer. Data obtained was analyzed in SPSS Version 21. P < 0.05 was set for statistical significant at 95% Confidence Interval (CI). Results: Majority of the participants belong to Janjati (46.5%) ethnicity, followed by Brahmin/Chhetri (41.7%), residing either in urban or suburban locality. Most of them were non-vegetarian, non-smoker, and non-alcoholic. Subjects were divided into hyperthyroid (TSH < 0.3 uIU/ml), hypothyroid (TSH > 4.5 uIU/ml), and euthyroid (TSH=0.3-4.5 uIU/ml) based on TSH value. We reported 10.3% hyperthyroid and 29.2% hypothyroid cases. TSH was significantly correlated with T3 (r=-0.244; p < 0.001) T4 (r=-0.398; p < 0.001); age (r=-0.138; p=0.023) and BMI (r=0.123; p=0.043). Multiple linear regression model for TSH reveals only T3 and T4 were significantly associated with TSH (p < 0.001; p=0.001). Conclusion: To conclude, nearly 39.5% of the postmenopausal women had thyroid disorder. Postmenopausal women are vulnerable to thyroid disorder; therefore, requires regular thyroid monitoring. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20stimulating%20hormone" title="thyroid stimulating hormone">thyroid stimulating hormone</a>, <a href="https://publications.waset.org/abstracts/search?q=TSH" title=" TSH"> TSH</a>, <a href="https://publications.waset.org/abstracts/search?q=T3" title=" T3"> T3</a>, <a href="https://publications.waset.org/abstracts/search?q=T4" title=" T4"> T4</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20disorder" title=" thyroid disorder"> thyroid disorder</a> </p> <a href="https://publications.waset.org/abstracts/124840/thyroid-hormones-and-thyrotropin-status-in-nepalese-postmenopausal-women" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124840.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">131</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">269</span> Thyroid Dysfunction in Patients with Chronic Hemodialysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benghezel%20Hichem">Benghezel Hichem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thyroid dysfunction in hemodialysis subjects is represented mainly by hypothyroidism. The objective of our work is to determine the thyroid profile of our hemodialysis patients and to highlight the prevalence of different thyroid disorders. Methods: This is a retrospective study performed on a mono centric 2 months (February and March 2013) on 42 hemodialysis patients (11 male and 31 female). We made the dosage of thyroid hormones Thyrotropin (TSH) ((free thyroxin ) FT4 and free Triodothyronin ) FT3) by chemiluminescence immunoassay method on cobas 6000 Roche Diagnostics. The results: The prevalence of biological hypothyroidism was 18% (7% with a high TSH isolated and a mean +/- SD 9.44 +/- 6.29, 5% with high TSH, and with low FT4 a mean +/- SD is 8.18 +/- 0.53 for TSH and 9.69 +/- 0.22 for FT4, One patient with a high TSH, and low FT4, FT3. 4% of patients with a low T3 syndrome with a mean +/- SD of 3.93 +/- 0,3 for FT3), we notice that 5% of patients with hyperthyroidism TSH collapsed and mean +/- SD of TSH is 0.017 +/- 0,001. Conclusion: The biological Hypothyroidism is a common endocrine disorder in chronic hemodialysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hypothyroidism" title="hypothyroidism">hypothyroidism</a>, <a href="https://publications.waset.org/abstracts/search?q=hemodialysis" title=" hemodialysis"> hemodialysis</a>, <a href="https://publications.waset.org/abstracts/search?q=thyr%C3%A9ostimulin" title=" thyréostimulin"> thyréostimulin</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20thyroxin" title=" free thyroxin"> free thyroxin</a>, <a href="https://publications.waset.org/abstracts/search?q=triodothyronin" title=" triodothyronin"> triodothyronin</a> </p> <a href="https://publications.waset.org/abstracts/42006/thyroid-dysfunction-in-patients-with-chronic-hemodialysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42006.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">422</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">268</span> Weight Gain After Total Thyroidectomy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yong%20Seong%20Kim">Yong Seong Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Seongbin%20Hong"> Seongbin Hong</a>, <a href="https://publications.waset.org/abstracts/search?q=So%20Hun%20Kim"> So Hun Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Moonsuk%20Nam"> Moonsuk Nam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Patients who undergo thyroidectomy due to thyroid cancer often complain weight gain, although they are on suppressive thyroid hormone treatment. The aim of this study is to know whether thyroid cancer patients gain the weight after thyroidectomy and weight change is dependent on estrogen state or use of rhTSH. Material and Method: We performed a retrospective chart review of subjects receiving medical care at an academic medical center. Two hundred two patients who underwent total thyroidectomy were included. As a control group, patients with thyroid nodule and euthyroidism were matched for age, gender, menopausal status. The weight changes occurring over first one year and thyroid function were assessed. Results: Mean age was 51±12 years and patients was composed with 38% of premenopausal, 15 % perimenopausal women, 37% of postmenopausal women and 20% of men. Patients with thyroid cancer gained 2.2 kg during the first year. It’ was not significantly different with control. However, weigh change in perimenopausal and post menopausal women gained more weight than control (P <0.05). Age, baseline body weight and weight gain were not correlated. Discussion: Patient who had undergone thyroidectomy gained more weight than their control, especially in peri- and postmenopausal women. Patients in this age should be monitored for their weight carefully. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=weight%20gain" title="weight gain">weight gain</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroidectomy" title=" thyroidectomy"> thyroidectomy</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20cancer" title=" thyroid cancer"> thyroid cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=weight%20chance" title=" weight chance "> weight chance </a> </p> <a href="https://publications.waset.org/abstracts/21104/weight-gain-after-total-thyroidectomy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21104.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">416</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">267</span> Evaluation of Prevalence of the Types of Thyroid Disorders Using Ultrasound and Pathology of One-Humped Camel in Iran: Camelus dromedarius</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Yadegari">M. Yadegari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The thyroid gland is the largest classic endocrine organ that effects many organs of the body and plays a significant role in the process of Metabolism in animals. The aim of this study was to investigate the prevalence of thyroid disorders diagnosed by ultrasound and microscopic Lesions of the thyroid during the slaughter of apparently healthy One Humped Camels (Camelus dromedarius) in Iran. Randomly, 520 male camels (With an age range of 4 to 8 years), were studied in 2012 to 2013. The Camels’ thyroid glands were evaluated by sonographic examination. In both longitudinal and transverse view and then tissue sections were provide and stained with H & E and finally examined by light microscopy. The results obtained indicated the following: hyperplastic goiter (21%), degenerative changes (12%), follicular cysts (8%), follicular atrophy (4%), nodular hyperplasia (3%), adenoma (1%), carcinoma (1%) and simple goiter colloid (1%). Ultrasound evaluation of thyroid gland in adenoma and carcinoma showed enlargement and irregular of the gland, decreased echogenicity, and the heterogeneous thyroid parenchyma. Also, in follicular cysts were observed in the enlarged gland with no echo structures of different sizes and decreased echogenicity as a local or general. In nodular hyperplasia, increase echogenicity and heterogeneous parenchymal were seen. These findings suggest the use of Ultrasound as a screening test in the diagnosis of complications of thyroid disorders. Pathology also to be used for the diagnosis of thyroid problems and other side effects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20gland" title="thyroid gland">thyroid gland</a>, <a href="https://publications.waset.org/abstracts/search?q=one%20humped%20camel" title=" one humped camel"> one humped camel</a>, <a href="https://publications.waset.org/abstracts/search?q=sonography" title=" sonography"> sonography</a>, <a href="https://publications.waset.org/abstracts/search?q=pathology" title=" pathology"> pathology</a> </p> <a href="https://publications.waset.org/abstracts/21055/evaluation-of-prevalence-of-the-types-of-thyroid-disorders-using-ultrasound-and-pathology-of-one-humped-camel-in-iran-camelus-dromedarius" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21055.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">508</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">266</span> The Proportion of and Factors Associated With Thyroid Dysfunction among Individuals Referred To A Tertiary Care Facility in Kabul, Afghanistan</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Naeem%20Lakanwall">Mohammad Naeem Lakanwall</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background:The thyroid gland, located just below the vocal cord on each side of and anterior to the trachea, is one of the main endocrine glands. Its normal weight is 15 to 20 grams in adults. The thyroid secretes two most important hormones, thyroxine and triiodothyronine, usually called T4 and T3, respectively. These hormones greatly increase the metabolic rate of the body. In addition to T3 and T4, the thyroid gland secrets calcitonin as well which is a significant hormone for calcium metabolism. Objective: The aim of this study is to estimate the proportion of and to identify factors associated with thyroid dysfunction among individuals coming to a tertiary care facility in Kabul, Afghanistan. Material and Methods: An analytical cross-sectional study design was conducted from July to Sep 2018. Blood samples were obtained, serum TSH levels were measured, and the patients were divided into three diagnostic categories according to their serum TSH concentrations. 1) Hypothyroidism 2) Hyperthyroidism 3) Normal thyroid Results: A total of 127 individuals were part of the sample for the final analysis. The majority of study participants (77%) were females. A large number of the participants (92%) did not have a family history of thyroid dysfunction and the majority of the female participants, (85%) were not pregnant in the last two years. Furthermore, 98% of participants, were non-smokers. Conclusion: The findings of the current study showed a high prevalence of thyroid dysfunctions in individuals coming to FMIC for thyroid functions tests. The findings also indicated that aging and smoking are the factors associated with thyroid dysfunctions. Further studies are needed to find out the prevalence of and factors associated with thyroid dysfunctions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Afghanistan" title="Afghanistan">Afghanistan</a>, <a href="https://publications.waset.org/abstracts/search?q=Kabul" title=" Kabul"> Kabul</a>, <a href="https://publications.waset.org/abstracts/search?q=hypothyroidism" title=" hypothyroidism"> hypothyroidism</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperthyroidism" title=" hyperthyroidism"> hyperthyroidism</a>, <a href="https://publications.waset.org/abstracts/search?q=triiodothyronine" title=" triiodothyronine"> triiodothyronine</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroxine" title=" thyroxine"> thyroxine</a> </p> <a href="https://publications.waset.org/abstracts/140800/the-proportion-of-and-factors-associated-with-thyroid-dysfunction-among-individuals-referred-to-a-tertiary-care-facility-in-kabul-afghanistan" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140800.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">175</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">265</span> Enabling Non-invasive Diagnosis of Thyroid Nodules with High Specificity and Sensitivity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sai%20Maniveer%20Adapa">Sai Maniveer Adapa</a>, <a href="https://publications.waset.org/abstracts/search?q=Sai%20Guptha%20Perla"> Sai Guptha Perla</a>, <a href="https://publications.waset.org/abstracts/search?q=Adithya%20Reddy%20P."> Adithya Reddy P.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thyroid nodules can often be diagnosed with ultrasound imaging, although differentiating between benign and malignant nodules can be challenging for medical professionals. This work suggests a novel approach to increase the precision of thyroid nodule identification by combining machine learning and deep learning. The new approach first extracts information from the ultrasound pictures using a deep learning method known as a convolutional autoencoder. A support vector machine, a type of machine learning model, is then trained using these features. With an accuracy of 92.52%, the support vector machine can differentiate between benign and malignant nodules. This innovative technique may decrease the need for pointless biopsies and increase the accuracy of thyroid nodule detection. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20tumor%20diagnosis" title="thyroid tumor diagnosis">thyroid tumor diagnosis</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound%20images" title=" ultrasound images"> ultrasound images</a>, <a href="https://publications.waset.org/abstracts/search?q=deep%20learning" title=" deep learning"> deep learning</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title=" machine learning"> machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=convolutional%20auto-encoder" title=" convolutional auto-encoder"> convolutional auto-encoder</a>, <a href="https://publications.waset.org/abstracts/search?q=support%20vector%20machine" title=" support vector machine"> support vector machine</a> </p> <a href="https://publications.waset.org/abstracts/182971/enabling-non-invasive-diagnosis-of-thyroid-nodules-with-high-specificity-and-sensitivity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182971.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">58</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">264</span> Differentiated Thyroid Cancer Presenting with Solitary Bony Metastases to the Frontal Bone of the Skull</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Christy%20M.%20Moen">Christy M. Moen</a>, <a href="https://publications.waset.org/abstracts/search?q=Richard%20B.%20Townsley"> Richard B. Townsley</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Metastasis to the frontal bone in thyroid cancer is extremely rare. A literature review found only six cases of thyroid cancer that metastasised to the frontal bone, with two of those involving further bone sites. Case Report: The patient was originally referred to the Oral and Maxillofacial Surgery team with an isolated mass on her forehead. Biopsies were performed, which showed this was likely a metastatic deposit from thyroid cancer. CT-PET scan showed this was an isolated lesion. The patient had a total thyroidectomy, and the forehead lesion was managed with radiotherapy. On interval scanning, the patient’s bony lesion had increased in size and had new lung nodules, which likely represented further metastasis. Conclusion: Isolated bony metastases to the frontal bone are rare. An important clinical principle to remember is that a bony metastasis from an unknown primary is more likely than primary bone cancer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cancer" title="cancer">cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid" title=" thyroid"> thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=head%20and%20neck" title=" head and neck"> head and neck</a>, <a href="https://publications.waset.org/abstracts/search?q=surgery" title=" surgery"> surgery</a> </p> <a href="https://publications.waset.org/abstracts/138043/differentiated-thyroid-cancer-presenting-with-solitary-bony-metastases-to-the-frontal-bone-of-the-skull" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138043.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">212</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">263</span> Stability Analysis for an Extended Model of the Hypothalamus-Pituitary-Thyroid Axis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Beata%20Jackowska-Zduniak">Beata Jackowska-Zduniak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We formulate and analyze a mathematical model describing dynamics of the hypothalamus-pituitary-thyroid homoeostatic mechanism in endocrine system. We introduce to this system two types of couplings and delay. In our model, feedback controls the secretion of thyroid hormones and delay reflects time lags required for transportation of the hormones. The influence of delayed feedback on the stability behaviour of the system is discussed. Analytical results are illustrated by numerical examples of the model dynamics. This system of equations describes normal activity of the thyroid and also a couple of types of malfunctions (e.g. hyperthyroidism). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mathematical%20modeling" title="mathematical modeling">mathematical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=ordinary%20differential%20equations" title=" ordinary differential equations"> ordinary differential equations</a>, <a href="https://publications.waset.org/abstracts/search?q=endocrine%20system" title=" endocrine system"> endocrine system</a>, <a href="https://publications.waset.org/abstracts/search?q=delay%20differential%20equation" title=" delay differential equation"> delay differential equation</a> </p> <a href="https://publications.waset.org/abstracts/52938/stability-analysis-for-an-extended-model-of-the-hypothalamus-pituitary-thyroid-axis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52938.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">336</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">262</span> Clinical Implication of Hyper-Intense Signal Thyroid Incidentaloma on Time of Flight Magnetic Resonance Angiography</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Inseon%20Ryoo">Inseon Ryoo</a>, <a href="https://publications.waset.org/abstracts/search?q=Soo%20Chin%20Kim"> Soo Chin Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyena%20Jung"> Hyena Jung</a>, <a href="https://publications.waset.org/abstracts/search?q=Sangil%20Suh"> Sangil Suh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Objectives: The purpose of this study is to evaluate the clinical significance of hyper-intense signal thyroid incidentalomas on the time of flight magnetic resonance angiography (TOF-MRA) using correlation study with ultrasound (US). Methods: We retrospectively reviewed 3,505 non-contrast TOF-MRA performed at an institution between September 2014 and May 2017. Two radiologists correlated the thyroid incidentalomas detected on TOF-MRA with US features which was obtained within three months interval between MRA and US examinations in consensus method. Results: The prevalence of hyper-intense signal thyroid nodules incidentally detected on TOF-MRA was 1.2% (43/3505). Among them, 35 people (81.4%) underwent US examinations, and total 45 hyper-intense signal thyroid nodules were detected on US exams. Of these 45 nodules, 35 nodules (72.9%) were categorized as benign (K-TIRADS category 2) on US exams. Fine needle aspiration was performed on 9 nodules according to the indications recommended by Korean Society of Thyroid Radiology. All except one high-suspicious thyroid nodule were confirmed as benign (Bethesda 2) on cytologic exams. One high-suspicious nodule on US showed a non-diagnostic result (Bethesda 1) on cytologic exam. However, this nodule collapsed after aspiration of thick colloid material. Conclusions: Our study showed that the most hyper-intense signal thyroid nodules detected on TOF-MRA were benign. Therefore, if a hyper-intense signal incidentaloma is found on TOF-MRA, further evaluation, especially invasive biopsy of the nodules could be suspended unless the patient had other symptoms or clinical factors suggesting the need for further evaluation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=incidentaloma" title="incidentaloma">incidentaloma</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20nodule" title=" thyroid nodule"> thyroid nodule</a>, <a href="https://publications.waset.org/abstracts/search?q=TOF%20MR%20angiography" title=" TOF MR angiography"> TOF MR angiography</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a> </p> <a href="https://publications.waset.org/abstracts/93144/clinical-implication-of-hyper-intense-signal-thyroid-incidentaloma-on-time-of-flight-magnetic-resonance-angiography" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93144.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">167</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">261</span> Frequency and Factors Associated with Thyroid Dysfunction: A Descriptive Cross-Sectional Study from a Tertiary Care Center in Kabul, Afghanistan</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Naeem%20Lakanwall">Mohammad Naeem Lakanwall</a>, <a href="https://publications.waset.org/abstracts/search?q=Jamshid%20Abdul-Ghafar"> Jamshid Abdul-Ghafar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Endocrinopathies are a commonly occurring entity, particularly those of the thyroid gland; however, there is a lack of scientific literature from Afghanistan, a country with very limited health care facilities and resources. To our best knowledge, this is the first study aimed to describe the frequency of occurrence and factors associated with thyroid dysfunction in the Afghan population. The aim of this study is to estimate the frequency and to identify factors associated with thyroid dysfunction among individuals coming to a tertiary care facility in Kabul, Afghanistan. Methods: A cross-sectional study was conducted from July to Sep 2018 at the Department of Clinical Pathology, French Medical Institute for Mothers and Children (FMIC), Kabul, Afghanistan. Blood samples were obtained, serum TSH levels were analyzed, and the patients were divided into three diagnostic categories according to their serum TSH concentrations: 1) hypothyroidism, 2) hyperthyroidism, 3) normal. Results: A total of 127 individuals were included in the final analysis. The majority of study participants (77%) were females. A large number of the participants (92%) did not have a family history of thyroid dysfunction. 74% of the participants in the study had normal TSH levels classified as normal thyroid function, (14%) had lower TSH levels, and (12%) higher TSH levels, classified as hyper and hypothyroid, respectively. Conclusions: The findings of the current study showed a high frequency of thyroid dysfunctions from a single center. Further large-scale studies are needed to find out the prevalence and document this entity for better health outcomes in the country. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Afghanistan" title="Afghanistan">Afghanistan</a>, <a href="https://publications.waset.org/abstracts/search?q=factors" title=" factors"> factors</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency" title=" frequency"> frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=hypothyroid" title=" hypothyroid"> hypothyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperthyroid" title=" hyperthyroid"> hyperthyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid" title=" thyroid"> thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20stimulating%20hormone" title=" thyroid stimulating hormone"> thyroid stimulating hormone</a> </p> <a href="https://publications.waset.org/abstracts/135297/frequency-and-factors-associated-with-thyroid-dysfunction-a-descriptive-cross-sectional-study-from-a-tertiary-care-center-in-kabul-afghanistan" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/135297.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">171</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">260</span> Thyroid-Stimulating Hormone as a Stress Biomarker in Thyroidectomy Patients: A Cohort Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jeonghun%20Lee">Jeonghun Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, we investigated the relationship between stress and thyroid dysfunction in such patients who underwent thyroidectomy. This study included 101 patients who underwent thyroidectomy from January 2015 to June 2020 and experienced hypothyroidism. The included patients had good drug compliance with the same dosage of levothyroxine (LT4). The male-to-female ratio was 1:4.6, and the mean age was 45.4 years at surgery and 50.2 years at stressful events. Eighteen patients underwent lobectomies and, of these, 12 did not take LT4. The mean follow-up period was 49(8-93) months. Statistical analyses were performed using the paired t-test, Wilcoxon signed-rank test, and McNemer test using PROC MIXED with SAS 9.4. Forty-five patients (44.6%) had hypothyroidism with thyroid-stimulating hormone (TSH) >10 μIU/mL. There was distress in 81 patients and eustress in 10 patients. TSH levels increased during a mean 5.8 months (min 1, max 12) in 24 patients who specified the date of their life events. Even though each patient took the same dose of LT4, when the patients were under stress, both the free T4 and T3 decreased and TSH increased, regardless of whether the patient experienced distress or eustress (P <0.001). While adjusting for the effect of the free T4 and T3, TSH increased significantly in the patients after stress (P <0.001). For patients with thyroid cancer who are simultaneously experiencing life events, TSH may be used as a stress biomarker to enable the implementation of appropriate treatment and counseling strategies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=endocrine" title="endocrine">endocrine</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid" title=" thyroid"> thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20function" title=" thyroid function"> thyroid function</a>, <a href="https://publications.waset.org/abstracts/search?q=biomarker" title=" biomarker"> biomarker</a>, <a href="https://publications.waset.org/abstracts/search?q=stress" title=" stress"> stress</a> </p> <a href="https://publications.waset.org/abstracts/151409/thyroid-stimulating-hormone-as-a-stress-biomarker-in-thyroidectomy-patients-a-cohort-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151409.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">87</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">259</span> Detection and Expression of Peroxidase Genes in Trichoderma harzianum KY488466 and Its Response to Crude Oil Degradation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Michael%20Dare%20Asemoloye">Michael Dare Asemoloye</a>, <a href="https://publications.waset.org/abstracts/search?q=Segun%20Gbolagade%20Jonathan"> Segun Gbolagade Jonathan</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafiq%20Ahmad"> Rafiq Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Odunayo%20Joseph%20Olawuyi"> Odunayo Joseph Olawuyi</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20O.%20Adejoye"> D. O. Adejoye</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fungi have potentials for degrading hydrocarbons through the secretion of different enzymes. Crude oil tolerance and degradation by Trichoderma harzianum was investigated in this study with its ability to produce peroxidase enzymes (LiP and MnP). Many fungal strains were isolated from rhizosphere of grasses growing on a crude oil spilled site, and the most frequent strain based on percentage incidence was further characterized using morphological and molecular characteristics. Molecular characterization was done through the amplification of Ribosomal-RNA regions of 18s (1609-1627) and 28s (287-266) using ITS1 and ITS4 combinations and it was identified using NCBI BLAST tool. The selected fungus was also subjected to an in-vitro tolerance test at crude oil concentrations of 5, 10, 15, 20 and 25% while 0% served as control. In addition, lignin peroxidase genes (lig1-6) and manganese peroxidase gene (mnp) were detected and expressed in this strain using RT-PCR technique, its peroxidase producing activities was also studied in aliquots (U/ml). This strain had highest incidence of 80%, it was registered in NCBI as Trichoderma harzianum asemoJ KY488466. The strain KY488466 responded to crude oil concentrations as it increase, the dose inhibition response percentage (DIRP) increased from 41.67 to 95.41 at 5 to 25 % crude oil concentrations. All the peroxidase genes are present in KY488466, and expressed with amplified 900-1000 bp through RT-PCR technique. In this strain, lig2, lig4 and mnp genes were over-expressed, lig 6 was moderately expressed, while none of the genes was under-expressed. The strain also produced 90±0.87 U/ml lignin peroxidase and 120±1.23 U/mil manganese peroxidase enzymes in aliquots. These results imply that KY488466 can tolerate and survive high crude oil concentration and could be exploited for bioremediation of oil-spilled soils, the produced peroxidase enzymes could also be exploited for other biotechnological experiments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crude%20oil" title="crude oil">crude oil</a>, <a href="https://publications.waset.org/abstracts/search?q=enzymes" title=" enzymes"> enzymes</a>, <a href="https://publications.waset.org/abstracts/search?q=expression" title=" expression"> expression</a>, <a href="https://publications.waset.org/abstracts/search?q=peroxidase%20genes" title=" peroxidase genes"> peroxidase genes</a>, <a href="https://publications.waset.org/abstracts/search?q=tolerance" title=" tolerance"> tolerance</a>, <a href="https://publications.waset.org/abstracts/search?q=Trichoderma%20harzianum" title=" Trichoderma harzianum"> Trichoderma harzianum</a> </p> <a href="https://publications.waset.org/abstracts/77759/detection-and-expression-of-peroxidase-genes-in-trichoderma-harzianum-ky488466-and-its-response-to-crude-oil-degradation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77759.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">228</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">258</span> Papillary Thyroid Carcinoma Presenting as a Vascular Left Carotid Sheath Mass: A Case Report</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Karthikeyan%20M.">Karthikeyan M.</a>, <a href="https://publications.waset.org/abstracts/search?q=Paul%20M.%20J."> Paul M. J.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This case report discusses a 54-year-old woman from Salem, Tamilnadu, who presented with a rare case of papillary thyroid carcinoma (PTC), manifesting as a hypervascular mass in the left carotid sheath. The patient had a two-and-a-half-month history of non-progressive neck swelling, with symptoms including dysphagia and a choking sensation. Clinical examination and investigations such as FNAC and CECT revealed a large vascular mass in the left neck region, initially perplexing the diagnosis. The patient underwent total thyroidectomy and excision of the left carotid sheath mass. Histopathology confirmed PTC. Postoperatively, the patient received Iodine-131 ablation and showed good recovery with no recurrence. This case highlights the diagnostic challenge and atypical presentation of PTC as a vascular neck mass, emphasizing the importance of a comprehensive approach in evaluating thyroid and neck lesions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lateral%20neck%20vascular%20mass" title="lateral neck vascular mass">lateral neck vascular mass</a>, <a href="https://publications.waset.org/abstracts/search?q=lateral%20aberrant%20thyroid" title=" lateral aberrant thyroid"> lateral aberrant thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20vascular%20swelling" title=" thyroid vascular swelling"> thyroid vascular swelling</a>, <a href="https://publications.waset.org/abstracts/search?q=smooth%20post%20op%20recovery" title=" smooth post op recovery"> smooth post op recovery</a> </p> <a href="https://publications.waset.org/abstracts/179226/papillary-thyroid-carcinoma-presenting-as-a-vascular-left-carotid-sheath-mass-a-case-report" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/179226.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">53</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">257</span> High Catalytic Activity and Stability of Ginger Peroxidase Immobilized on Amino Functionalized Silica Coated Titanium Dioxide Nanocomposite: A Promising Tool for Bioremediation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Misha%20Ali">Misha Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Qayyum%20Husain"> Qayyum Husain</a>, <a href="https://publications.waset.org/abstracts/search?q=Nida%20Alam"> Nida Alam</a>, <a href="https://publications.waset.org/abstracts/search?q=Masood%20%20Ahmad"> Masood Ahmad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Improving the activity and stability of the enzyme is an important aspect in bioremediation processes. Immobilization of enzyme is an efficient approach to amend the properties of biocatalyst required during wastewater treatment. The present study was done to immobilize partially purified ginger peroxidase on amino functionalized silica coated titanium dioxide nanocomposite. Interestingly there was an enhancement in enzyme activity after immobilization on nanosupport which was evident from effectiveness factor (η) value of 1.76. Immobilized enzyme was characterized by transmission electron microscopy, scanning electron microscopy and Fourier transform infrared spectroscopy. Immobilized peroxidase exhibited higher activity in a broad range of pH and temperature as compared to free enzyme. Also, the thermostability of peroxidase was strikingly improved upon immobilization. After six repeated uses, the immobilized peroxidase retained around 62% of its dye decolorization activity. There was a 4 fold increase in Vmax of immobilized peroxidase as compared to free enzyme. Circular dichroism spectroscopy demonstrated conformational changes in the secondary structure of enzyme, a possible reason for the enhanced enzyme activity after immobilization. Immobilized peroxidase was highly efficient in the removal of acid yellow 42 dye in a stirred batch process. Our study shows that this bio-remediating system has remarkable potential for treatment of aromatic pollutants present in wastewater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acid%20yellow%2042" title="acid yellow 42">acid yellow 42</a>, <a href="https://publications.waset.org/abstracts/search?q=decolorization" title=" decolorization"> decolorization</a>, <a href="https://publications.waset.org/abstracts/search?q=ginger%20peroxidase" title=" ginger peroxidase"> ginger peroxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=immobilization" title=" immobilization"> immobilization</a> </p> <a href="https://publications.waset.org/abstracts/57680/high-catalytic-activity-and-stability-of-ginger-peroxidase-immobilized-on-amino-functionalized-silica-coated-titanium-dioxide-nanocomposite-a-promising-tool-for-bioremediation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57680.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">249</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">256</span> To Study Small for Gestational Age as a Risk Factor for Thyroid Dysfunction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shilpa%20Varghese">Shilpa Varghese</a>, <a href="https://publications.waset.org/abstracts/search?q=Adarsh%20Eregowda"> Adarsh Eregowda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: The normal development and maturation of the central nervous system is significantly influenced by thyroid hormones. Small for gestational age (SGA) babies have a distinct hormonal profile than kids born at an acceptable birth weight for gestational age, according to several studies (AGA). In SGA babies, thyroid size is larger when expressed as a percentage of body weight, indicating that low thyroid hormone levels throughout foetal life may be partially compensated for. Numerous investigations have found that compared to full-term and preterm AGA neonates, SGA babies exhibit considerably decreased thyroid plasma levels. According to our hypothesis, term and preterm SGA newborns have greater thyroid-stimulating hormone (TSH) concentrations than those that are normal for gestational age (AGA) and a higher incidence of thyroid dysfunction. Need for the study: Clinically diagnosed Assessment of term SGA babies confirming thyroid dysfunction unclear Requirement and importance of ft4 along with tsh and comparative values of ft4 in SGA babies as compared to AGA babies unclear. Inclusion criteria : SGA infants including preterm (<37 weeks of gestation) term (37-40 weeks) – comparing with preterm and term AGA infants. 3.76 7.66 0 2 4 6 8 10 12 AGA Babies SGA Babies Mean Mean TSH Comparison 2.73 1.52 0 0.5 1 1.5 2 2.5 3 3.5 4 AGA Babies SGA Babies Mean Mean FT4 Comparison Discussion : According to this study, neonates with SGA had considerably higher TSH levels than newborns with AGA. Our findings have been supported by results from earlier research. The TSH level range was established to 7.5 mU/L in the study by Bosch-Giménez et al, found greater TSH concentrations in SGA newborns. Thyroid hormone levels from newborns that are tiny for gestational age were found to be higher than AGA in our investigation. According to Franco et al., blood T4 concentrations are lower in both preterm and term SGA infants, while TSH concentrations are only noticeably greater in term SGA infants compared to AGA ones. According to our study analysis, the SGA group had considerably greater FT4 concentrations. Therefore, our findings are consistent with those of the two studies that SGA babies have a higher incidence of transient hypothyroidism and need close follow-up. Conclusions: A greater frequency of thyroid dysfunction and considerably higher TSH values within the normal range were seen in preterm and term SGA babies. The SGA babies who exhibit these characteristics should have ongoing endocrinologic testing and periodic TFTs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20hormone" title="thyroid hormone">thyroid hormone</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20function%20tests" title=" thyroid function tests"> thyroid function tests</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20for%20gestationl%20age" title=" small for gestationl age"> small for gestationl age</a>, <a href="https://publications.waset.org/abstracts/search?q=appropriate%20for%20gestational%20age" title=" appropriate for gestational age"> appropriate for gestational age</a> </p> <a href="https://publications.waset.org/abstracts/161876/to-study-small-for-gestational-age-as-a-risk-factor-for-thyroid-dysfunction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161876.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">65</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">255</span> Recurrence of Papillary Thyroid Cancer with an Interval of 40 Years. Report of an Autopsy Case</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Satoshi%20Furukawa">Satoshi Furukawa</a>, <a href="https://publications.waset.org/abstracts/search?q=Satomu%20Morita"> Satomu Morita</a>, <a href="https://publications.waset.org/abstracts/search?q=Katsuji%20Nishi"> Katsuji Nishi</a>, <a href="https://publications.waset.org/abstracts/search?q=Masahito%20Hitosugi"> Masahito Hitosugi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A 75-year-old woman took thyroidectomy forty years previously. Enlarged masses were seen at autopsy just above and below the left clavicle. We proved the diagnosis of papillary thyroid cancer (PTC) and lung metastasis by histological examinations. The prognosis of PTC is excellent; the 10-year survival rate ranges between 85 and 99%. Lung metastases may be found in 10% of the patients with PTC. We report an unusual case of recurrence of PTC with metastasis to the lung. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=papillary%20thyroid%20cancer" title="papillary thyroid cancer">papillary thyroid cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=lung%20metastasis" title=" lung metastasis"> lung metastasis</a>, <a href="https://publications.waset.org/abstracts/search?q=autopsy" title=" autopsy"> autopsy</a>, <a href="https://publications.waset.org/abstracts/search?q=histopathological%20findings" title=" histopathological findings "> histopathological findings </a> </p> <a href="https://publications.waset.org/abstracts/13909/recurrence-of-papillary-thyroid-cancer-with-an-interval-of-40-years-report-of-an-autopsy-case" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13909.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">340</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">254</span> Fine Needle Aspiration Biopsy of Thyroid Nodules</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ilirian%20La%C3%A7i">Ilirian Laçi</a>, <a href="https://publications.waset.org/abstracts/search?q=Alketa%20Spahiu"> Alketa Spahiu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Big strums of thyroid glandule observed by a simple viewing can be witnessed in everyday life. Medical cabinets evidence patients withpalpablenodes of thyroid glandule, mainly nodes of the size of 10 millimeters. Further, more cases which have resulted in negative under palpation have resulted in positive at ultrasound examination. Therefore, the use of ultrasound for diagnosing has increased the number of patients with nodes of thyroid glandule in the last couple of decades in all countries, Albania included. Thus, there has been evidence of an increased number of patients affected by this pathology, where female patients dominate. Demographically, the capital shows high numbers due to the high population, but of interest is the high incidence of those areas distanced from the sea. While regarding related pathologies, no significant link was evidenced, an element of ancestry was evident in the nodes of the thyroid glandule. When we talk of nodes of the thyroid glandule, we should consider hyperplasia, neoplasia, and inflammatory diseases that cause nodes of the thyroid glandule. This increase parallels the world’s increase of the incidence of thyroid glandule, with malign cases, which are at about 5% and are not depended on size. Given the numbers, with most thyroid glandule nodes being benign, the main objective of the examination of the nodes was the determination of benign and malign cases to avoid undue surgery. Subject of this study were 212 patients that underwent fine-needle aspiration (FNA) under ultrasound guidance at the Medical University Center of Tirana. All the patients came to the Mother Teresa University Hospital from public and private hospitals and other polyclinics. These patients had an ultrasound examination before visiting the Center of Nuclear Medicine for a scintigraph of thyroid glandule in the period September 2016 and September 2017. To correlate, all patients had been examined via ultrasound of the thyroid glandule prior to the scintigraph. The ultrasound included evaluation of the number of nodes, their size, their solid, cystic, or solid-cystic structure, echogenicity according to the gray scale, the presence of calcification, the presence of lymph nodes, the presence of adenopathy, and the correlation of the cytology results from the Laboratory of Pathological Anatomy of Medical University Center of Tirana. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid%20nodes" title="thyroid nodes">thyroid nodes</a>, <a href="https://publications.waset.org/abstracts/search?q=fine%20needle%20aspiration" title=" fine needle aspiration"> fine needle aspiration</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a>, <a href="https://publications.waset.org/abstracts/search?q=scintigraphy" title=" scintigraphy"> scintigraphy</a> </p> <a href="https://publications.waset.org/abstracts/152501/fine-needle-aspiration-biopsy-of-thyroid-nodules" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152501.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">102</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">253</span> A Four-Year Study of Thyroid Carcinoma in Hail Region: Increased Incidence</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Laila%20Seada">Laila Seada</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanan%20Oreiby"> Hanan Oreiby</a>, <a href="https://publications.waset.org/abstracts/search?q=Fawaz%20Al%20Rashid"> Fawaz Al Rashid</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashraf%20Negm"> Ashraf Negm</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background and Objective: In most areas of the world, the incidence of thyroid cancer has been increasing over the last decade, mostly due to a combination of early detection of the neoplasm resulting from sensitive procedures and increased population exposure to radiation and unrecognized carcinogens. Methods: Cases of thyroid cancer have been retrieved from the cancer registry at King Khalid Hospital during the period from August 2012 to April 2016. Age, gender and histopathologic types have been recorded. Results: Thyroid carcinoma ranked as the second most common malignancy in females (25%) after breast cancer (31%). It constituted 20.8% of all newly diagnosed cancer cases. As for males, it ranked the 4<sup>th</sup> type of malignancy after gastrointestinal cancer, lymphomas and soft tissue sarcomas. Mean age for females and males was 38.7 +/- 13.2 and 60.25 +/- 11.5 years, respectively, and the difference between the two groups was statistically significant (<em>p</em> value = 0.0001). Fifty-five (82%) were papillary carcinomas including 10 follicular variant of papillary (FVPC), and eight papillary micro carcinomas (PMC) and two tall cell/oncocytic variants. Follicular carcinomas constituted two (3.1%), while two (3.1%) were anaplastic, and two (3.1%) were medullary. Conclusion: Thyroid cancer incidence in Hail is ranking as the 2<sup>nd</sup> most common female malignancy similar to other regions in the Kingdom. However, this high incidence contrasts with much lower rates worldwide. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thyroid" title="thyroid">thyroid</a>, <a href="https://publications.waset.org/abstracts/search?q=hail" title=" hail"> hail</a>, <a href="https://publications.waset.org/abstracts/search?q=papillary" title=" papillary"> papillary</a>, <a href="https://publications.waset.org/abstracts/search?q=microcarcinoma" title=" microcarcinoma"> microcarcinoma</a> </p> <a href="https://publications.waset.org/abstracts/53170/a-four-year-study-of-thyroid-carcinoma-in-hail-region-increased-incidence" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53170.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">308</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">252</span> Positive effect of Cu2+ and Ca2+ on the Thermostability of Bambara Groundnut Peroxidase A6, and its Catalytic Efficiency Toward the Oxidation of 3,3,5,5 -Tetramethyl Benzidine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yves%20Mann%20Elate%20Lea%20Mbassi">Yves Mann Elate Lea Mbassi</a>, <a href="https://publications.waset.org/abstracts/search?q=Marie%20Solange%20Evehe%20Bebandoue"> Marie Solange Evehe Bebandoue</a>, <a href="https://publications.waset.org/abstracts/search?q=Wilfred%20Fon%20Mbacham"> Wilfred Fon Mbacham</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Improving the catalytic performance of enzymes has been a long-standing theme of analytical biochemistry research. Induction of peroxidase activity by metals is a common reaction in higher plants. We thought that this increase in peroxidase activity may be due, on the one hand, to the stimulation of the gene expression of these enzymes but also to a modification of their chemical reactivity following the binding of some metal ions on their active site. We tested the effect of some metal salts (MgCl₂, MnCl₂, ZnCl₂, CaCl₂ and CuSO₄) on the activity and thermostability of peroxidase A6, a thermostable peroxidase that we discovered and purified in a previous study. The chromogenic substrate used was 3,3′,5,5′-tetramethylbenzidine. Of all the metals tested for their effect on A6, only magnesium and copper had a significant effect on the activity of the enzyme at room temperature. The Mann-Whitney test shows a slight inhibitory effect of activity by the magnesium salt (P = 0.043), while the activity of the enzyme is 5 times higher in the presence of the copper salt (P = 0.002). Moreover, the thermostability of peroxidase A6 is increased when calcium and copper salts are present. The activity in the presence of CaCl₂ is 8 times higher than the residual activity of the enzyme alone after incubation at 80°C for 10 min and 35 times higher in the presence of CuSO4 under the same conditions. In addition, manganese and zinc salts slightly reduce the thermostability of the enzyme. The activity and structural stability of peroxidase A6 can clearly be activated by Cu₂+, which therefore enhance the oxidation of 3,3′,5,5′-tetramethylbenzidine, which was used in this study as a chromogenic substrate. Ca₂+ likely has a more stabilizing function for the catalytic site. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=peroxidase%20activity" title="peroxidase activity">peroxidase activity</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20ions" title=" copper ions"> copper ions</a>, <a href="https://publications.waset.org/abstracts/search?q=calcium%20ions" title=" calcium ions"> calcium ions</a>, <a href="https://publications.waset.org/abstracts/search?q=thermostability" title=" thermostability"> thermostability</a> </p> <a href="https://publications.waset.org/abstracts/165588/positive-effect-of-cu2-and-ca2-on-the-thermostability-of-bambara-groundnut-peroxidase-a6-and-its-catalytic-efficiency-toward-the-oxidation-of-3355-tetramethyl-benzidine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165588.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">73</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">251</span> Subacute Thyroiditis Triggered by Sinovac and Oxford-AstraZeneca Vaccine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ratchaneewan%20Salao">Ratchaneewan Salao</a>, <a href="https://publications.waset.org/abstracts/search?q=Steven%20W.%20Edwards"> Steven W. Edwards</a>, <a href="https://publications.waset.org/abstracts/search?q=Kiatichai%20Faksri"> Kiatichai Faksri</a>, <a href="https://publications.waset.org/abstracts/search?q=Kanin%20Salao"> Kanin Salao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: A two-dose regimen of COVID-19 vaccination (inactivated whole virion SARS-CoV-2 and adenoviral vector) has been widely used. Side effects are very low, but several adverse effects have been reported. Methods: A 40-year-old female patient, with a previous history of thyroid goitre, developed severe neck pain, headache, nausea and fatigue 7-days after receiving second vaccination with Vaxzevria® (Oxford-AstraZeneca). Clinical and laboratory findings, including thyroid function tests and ultrasound of thyroid glands, were performed. Results: Her left thyroid gland was multinodular enlarged, and severely tender on palpation. She had difficulty in swallowing and had tachycardia but no signs of hyperthyroidism. Laboratory results supported a diagnosis of subacute thyroiditis. She was prescribed NSAID (Ibuprofen 400 mg) and dexamethasone for 3-days and her symptoms resolved. Conclusions: Although this is an extremely rare event, physicians may encounter more cases of this condition due to the extensive vaccination program using this combination of vaccines. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=SARS-CoV-2" title="SARS-CoV-2">SARS-CoV-2</a>, <a href="https://publications.waset.org/abstracts/search?q=adenoviral%20vector%20vaccines" title=" adenoviral vector vaccines"> adenoviral vector vaccines</a>, <a href="https://publications.waset.org/abstracts/search?q=vaccination" title=" vaccination"> vaccination</a>, <a href="https://publications.waset.org/abstracts/search?q=subacute%20thyroiditis" title=" subacute thyroiditis"> subacute thyroiditis</a> </p> <a href="https://publications.waset.org/abstracts/162529/subacute-thyroiditis-triggered-by-sinovac-and-oxford-astrazeneca-vaccine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162529.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">71</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=thyroid%20peroxidase&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=thyroid%20peroxidase&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=thyroid%20peroxidase&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=thyroid%20peroxidase&page=5">5</a></li> <li class="page-item"><a class="page-link" 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