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The material presents the buildup of bacteria while keeping its sticky hold, even on wet surfaces, and could be useful in biomedical applications." /> <meta property="og:site_name" content="MIT News | Massachusetts Institute of Technology" /> <meta property="og:type" content="article" /> <meta property="og:url" content="https://news.mit.edu/2025/engineers-turn-bodys-goo-into-new-glue-0217" /> <meta property="og:author" content="Jennifer Chu | MIT News" /> <link rel="image_src" href="https://news.mit.edu/sites/default/files/images/202502/MIT-Mucus-Tape-02-PRESS_0.jpg" /> <link rel="canonical" href="https://news.mit.edu/2025/engineers-turn-bodys-goo-into-new-glue-0217" /> <title>Engineers turn the body’s goo into new glue | MIT News | Massachusetts Institute of Technology</title> <link rel="icon" href="/themes/mit/assets/img/favicon/favicon.ico" sizes="32x32"> <link rel="icon" href="/themes/mit/assets/img/favicon/favicon.svg" type="image/svg+xml"> <link rel="apple-touch-icon" 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new glue </li> </ol> </div> </div> <div data-drupal-messages-fallback class="hidden"></div> <div id="block-mit-page-title"> <div class="block-inner"> <h1><span itemprop="name headline">Engineers turn the body’s goo into new glue</span> </span> </h1> </div> </div> <div id="block-mit-content"> <div class="block-inner"> <article> <div> <div itemprop="description" class="news-article--dek"> <span>They combined a blend of slimy and sticky proteins to produce a fast-acting, bacteria-blocking, waterproof adhesive for use in biomedical applications.</span> </div> <div class="news-article--indicators"> </div> <div itemprop="author" class="news-article--authored-by"> <span class="news-article--author">Jennifer Chu</span> <span class="news-article--authored-by--separator">|</span> <span class="news-article--source">MIT News</span> </div> <div itemprop="datePublished" class="news-article--publication-date"> <div class="visually-hidden"> <span class="label">Publication Date</span><span 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class="press-contact"> <div class="news-article--press-inquiries--press-contact--name"> Abby Abazorius </div> <div class="news-article--press-inquiries--press-contact--email"> <span class="label"> Email: </span> <a href="mailto:abbya@mit.edu">abbya@mit.edu</a> </div> <div class="news-article--press-inquiries--press-contact--phone"> <span class="label"> Phone: </span> 617-253-2709 </div> <div class="news-article--press-inquiries--press-contact--org"> MIT News Office </div> </div> </div> <div class="news-article--press-inquiries--download-images"> <h3>Media Download</h3> <div class="paragraph paragraph--type--download-item-image paragraph--view-mode--news-article__downloadable-image"> <div class="news-article--download-image--item"> <div class="news-article--download-image--item--file"> <a href="/sites/default/files/download/202502/MIT-Mucus-Tape-01-PRESS.jpg" target="_blank"> <img loading="lazy" src="/sites/default/files/styles/news_article__download/public/download/202502/MIT-Mucus-Tape-01-PRESS.jpg?itok=ugAArUnX" width="270" height="180" alt="Diagram showing protein fibers linked with mussel-inspired polymers " /> </a> <div class="news-article--download-image--item--file--download"> ↓ <a href="/sites/default/files/download/202502/MIT-Mucus-Tape-01-PRESS.jpg" target="_blank" class="news-article--download-image--item--file--download-link">Download Image</a> </div> </div> <div class="news-article--download-image--item--descr"> <div class="news-article--download-image--item--caption"> <span class="label">Caption</span><span class="visually-hidden">:</span> By “cross-linking” protein fibers (blue strand) from mucin and mussel-inspired polymers, MIT researchers have created a new glue that also is resistant to bacteria (red sphere) and other pathogens. </div> <div class="news-article--download-image--item--credits"> <span class="label">Credits</span><span class="visually-hidden">:</span> Credit: Courtesy of the researchers </div> </div> </div> </div> <div class="paragraph paragraph--type--download-item-image paragraph--view-mode--news-article__downloadable-image"> <div class="news-article--download-image--item"> <div class="news-article--download-image--item--file"> <a href="/sites/default/files/download/202502/MIT-Mucus-Tape-02-PRESS.jpg" target="_blank"> <img loading="lazy" src="/sites/default/files/styles/news_article__download/public/download/202502/MIT-Mucus-Tape-02-PRESS.jpg?itok=kPY_Ush7" width="270" height="180" alt="Diagram of 5mm gel sheet, showing mucus protein and polymers coming together at star-shaped crosslinkers" /> </a> <div class="news-article--download-image--item--file--download"> ↓ <a href="/sites/default/files/download/202502/MIT-Mucus-Tape-02-PRESS.jpg" target="_blank" class="news-article--download-image--item--file--download-link">Download Image</a> </div> </div> <div class="news-article--download-image--item--descr"> <div class="news-article--download-image--item--caption"> <span class="label">Caption</span><span class="visually-hidden">:</span> Mucus-derived proteins (mucins) and mucin-inspired polymers can be transformed into sticky gels using a crosslinking strategy inspired by the adhesion of marine mussels. </div> <div class="news-article--download-image--item--credits"> <span class="label">Credits</span><span class="visually-hidden">:</span> Credit: Courtesy of the researchers </div> </div> </div> </div> </div> <div class="news-article--press-inquiries--download-images--terms-of-use"> <h4 class="news-article--press-inquiries--download-images--terms-of-use--title">*Terms of Use:</h4> <p> Images for download on the MIT News office website are made available to non-commercial entities, press and the general public under a <a href="http://creativecommons.org/licenses/by-nc-nd/3.0/" target="_blank">Creative Commons Attribution Non-Commercial No 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class="visually-hidden">:</span> </div> Mucus-derived proteins (mucins) and mucin-inspired polymers can be transformed into sticky gels using a crosslinking strategy inspired by the adhesion of marine mussels. </div> <div class="news-article--media--image--credits"> <div class="visually-hidden"> <span class="label">Credits</span><span class="visually-hidden">:</span> </div> Credit: Courtesy of the researchers </div> </div> </div> </div> <div class="news-article--image-item"> <div class="news-article--media--image--file"> <img loading="lazy" src="/themes/mit/src/img/placeholder/placeholder--news-article--image-gallery.jpg" width="900" height="600" alt="Diagram showing protein fibers linked with mussel-inspired polymers " class="ondemand" data-src="/sites/default/files/styles/news_article__image_gallery/public/images/202502/MIT-Mucus-Tape-01-PRESS_0.jpg?itok=jL7vh6hh" /> </div> <div class="news-article--media--image--descr--wrapper"> <div class="news-article--media--image--descr"> <div class="news-article--media--image--caption"> <div class="visually-hidden"> <span class="label">Caption</span><span class="visually-hidden">:</span> </div> By “cross-linking” protein fibers (blue strand) from mucin and mussel-inspired polymers, MIT researchers have created a new glue that also is resistant to bacteria (red sphere) and other pathogens. </div> <div class="news-article--media--image--credits"> <div class="visually-hidden"> <span class="label">Credits</span><span class="visually-hidden">:</span> </div> Credit: Courtesy of the researchers </div> </div> </div> </div> </div> <div class="news-article--images-gallery--nav"> <p class="news-article--images-gallery--nav--inner"> <button class="news-article--images-gallery--nav--button news-article--images-gallery--nav--button--previous"><svg class="arrow--point-west--slider" data-name="Group 2041" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="0" viewBox="0 0 16.621 30.183"> <defs> <clipPath 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<p>Within the animal kingdom, mussels are masters of underwater adhesion. The marine molluscs cluster atop rocks and along the bottoms of ships, and hold fast against the ocean’s waves thanks to a gluey plaque they secrete through their foot. These tenacious adhesive structures have prompted scientists in recent years to design similar bioinspired, waterproof adhesives.</p><p>Now engineers from MIT and Freie Universität Berlin have developed a new type of glue that combines the waterproof stickiness of the mussels’ plaques with the germ-proof properties of another natural material: mucus.</p><p>Every surface in our bodies not covered in skin is lined with a protective layer of mucus — a slimy network of proteins that acts as a physical barrier against bacteria and other infectious agents. In their new work, the engineers combined sticky, mussel-inspired polymers with mucus-derived proteins, or mucins, to form a gel that strongly adheres to surfaces.</p><p>The new mucus-derived glue prevented the buildup of bacteria while keeping its sticky hold, even on wet surfaces. The researchers envision that once the glue’s properties are optimized, it could be applied as a liquid by injection or spray, which would then solidify into a sticky gel. The material might be used to coat medical implants, for example, to prevent infection and bacteria buildup.</p><p>The team’s new glue-making approach could also be adjusted to incorporate other natural materials, such as keratin — a fibrous substance found in feathers and hair, with certain chemical features resembling those of mucus.</p><p>“The applications of our materials design approach will depend on the specific precursor materials,” says George Degen, a postdoc in MIT’s Department of Mechanical Engineering. “For example, mucus-derived or mucus-inspired materials might be used as multifunctional biomedical adhesives that also prevent infections. Alternatively, applying our approach to keratin might enable development of sustainable packaging materials.”</p><p>A paper detailing the team’s results <a href="https://doi.org/10.1073/pnas.2415927122" target="_blank">appears this week in the <em>Proceedings of the National Academy of Sciences</em></a>. Degen’s MIT co-authors include Corey Stevens, Gerardo Cárcamo-Oyarce, Jake Song, Katharina Ribbeck, and Gareth McKinley, along with Raju Bej, Peng Tang, and Rainer Haag of Freie Universität Berlin.</p><p><strong>A sticky combination</strong></p><p>Before coming to MIT, Degen was a graduate student at the University of California at Santa Barbara, where he worked in a research group that studied the adhesive mechanisms of mussels.</p><p>“Mussels are able to deposit materials that adhere to wet surfaces in seconds to minutes,” Degen says. “These natural materials do better than existing commercialized adhesives, specifically at sticking to wet and underwater surfaces, which has been a longstanding technical challenge.”</p><p>To stick to a rock or a ship, mussels secrete a protein-rich fluid. Chemical bonds, or cross-links, act as connection points between proteins, enabling the secreted substance to simultaneously solidify into a gel and stick to a wet surface.</p><p>As it happens, similar cross-linking features are found in mucin — a large protein that is the primary non-water component of mucus. When Degen came to MIT, he worked with both McKinley, a professor of mechanical engineering and an expert in materials science and fluid flow, and Katharina Ribbeck, a professor of biological engineering and a leader in the study of mucus, to develop a cross-linking glue that would combine the adhesive qualities of mussel plaques with the bacteria-blocking properties of mucus.</p><p><strong>Mixing links</strong></p><p>The MIT researchers teamed up with Haag and colleagues in Berlin who specialize in synthesizing bioinspired materials. Haag and Ribbeck are members of a collaborative research group that develops dynamic hydrogels for biointerfaces. Haag’s group has made mussel-like adhesives, as well as mucus-inspired liquids by producing microscopic, fiber-like polymers that are similar in structure to the natural mucin proteins.</p><p>For their new work, the researchers focused on a chemical motif that appears in mussel adhesives: a bond between two chemical groups known as “catechols” and “thiols.” In the mussel’s natural glue, or plaque, these groups combine to form catechol–thiol cross-links that contribute to the cohesive strength of the plaque. Catechols also enhance a mussel’s adhesion by binding to surfaces such as rocks and ship hulls.</p><p>Interestingly, thiol groups are also prevalent in mucin proteins. Degen wondered whether mussel-inspired polymers could link with mucin thiols, enabling the mucins to quickly turn from a liquid to a sticky gel.</p><p>To test this idea, he combined solutions of natural mucin proteins with synthetic mussel-inspired polymers and observed how the resulting mixture solidified and stuck to surfaces over time.</p><p>“It’s like a two-part epoxy. You combine two liquids together, and chemistry starts to occur so that the liquid solifidies while the substance is simultaneously glueing itself to the surface,” Degen says. </p><p>“Depending on how much cross-linking you have, we can control the speed at which the liquids gelate and adhere,” Haag adds. “We can do this all on wet surfaces, at room temperature, and under very mild conditions. This is what is quite unique.”</p><p>The team deposited a range of compositions between two surfaces and found that the resulting adhesive held the surfaces together, with forces comparable to the commercial medical adhesives used for bonding tissue. The researchers also tested the adhesive’s bacteria-blocking properties by depositing the gel onto glass surfaces and incubating them with bacteria overnight.</p><p>“We found if we had a bare glass surface without our coating, the bacteria formed a thick biofilm, whereas with our coating, biofilms were largely prevented,” Degen notes.</p><p>The team says that with a bit of tuning, they can further improve the adhesive’s hold. Then, the material could be a strong and protective alternative to existing medical adhesives.</p><p>“We are excited to have established a biomaterials design platform that gives us these desirable properties of gelation and adhesion, and as a starting point we’ve demonstrated some key biomedical applications,” Degen says. “We are now ready to expand into different synthetic and natural systems and target different applications.”</p><p>This research was funded, in part, by the U.S. National Institutes of Health, the U.S. National Science Foundation, and the U.S. Army Research Office.</p> </div> </div> </div> <div class="news-article--content--side-column"> <div> <div class="block-inner"> <div class="news-article--share"> <div class="news-article--share--inner"> <h3 class="news-article--share--title">Share<span class="visually-hidden"> this news article on:</span></h3> <ul class="news-article--share--list-items"> <li class="news-article--share--item"> <a 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class="news-article--content--related-links"> <h2>Related Links</h2> <div class="views-element-container"><div class="js-view-dom-id-fc61f50f5109077ac09d55ba8ed3d4f3bbafda34011db801af6eea438894fe0a"> <div><div class="news-article--content--related-links--items"><ul><li><a href="http://nnf.mit.edu/people/george-degen" target="_blank">George Degen</a></li><li><a href="https://meche.mit.edu/people/faculty/GARETH@MIT.EDU" target="_blank">Gareth McKinley</a></li><li><a href="https://biogels.mit.edu/" target="_blank">Katharina Ribbeck</a></li><li><a href="https://be.mit.edu/" target="_blank">Department of Biological Engineering</a></li><li><a href="https://meche.mit.edu/" target="_blank">Department of Mechanical Engineering</a></li><li><a href="https://engineering.mit.edu/" target="_blank">School of Engineering</a></li></ul></div></div> </div> </div> </div> </div> </div> <div class="news-article--topics"> <h2>Related Topics</h2> <ul class="news-article--topics-list"> <li 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