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<p class="publishdate"><span property="dc:date" datatype="xsd:dateTime" content="2014-01-27T00:00:00-05:00" class="date-display-single">January 27, 2014</span></p><div class='syndicate'><h1>Nature-Inspired Surgical Glue Mends Hearts</h1><div class="media-float-right"><div class="ds-1col file file-image file-image-jpeg view-mode-floated_media clearfix">
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<picture title="Illustration of patch being applied to heart tissue">
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<!--[if IE 9]><video style="display: none;"><![endif]-->
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-large/public/news-events/research-matters/2014/20140127-glue.jpg?itok=bKAv741C&timestamp=1431113041 1x" media="screen and (min-width: 960px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium/public/news-events/research-matters/2014/20140127-glue.jpg?itok=dyO6vvrG&timestamp=1431113041 1x" media="screen and (min-width: 800px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium-small/public/news-events/research-matters/2014/20140127-glue.jpg?itok=DQsL3XNK&timestamp=1431113041 1x" media="screen and (min-width: 600px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-small/public/news-events/research-matters/2014/20140127-glue.jpg?itok=ph5LzePi&timestamp=1431113041 1x" media="screen and (min-width: 480px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-tiny/public/news-events/research-matters/2014/20140127-glue.jpg?itok=YACGqfud&timestamp=1431113041 1x" media="screen and (min-width: 0)" />
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<!--[if IE 9]></video><![endif]-->
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<img src="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium/public/news-events/research-matters/2014/20140127-glue.jpg?itok=dyO6vvrG&timestamp=1431113041" alt="Illustration of patch being applied to heart tissue." title="Illustration of patch being applied to heart tissue" />
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</picture><span class="caption">The waterproof, light-activated glue can successfully secure biodegradable patches to seal holes in a beating heart.</span><span class="credit">Karp Laboratory</span></div>
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</div><p>Researchers developed a new tissue adhesive that is biodegradable, biocompatible, and easily manipulated. It could allow for less invasive surgeries that don’t require sutures or staples.</p>
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<p>During surgery, reconnecting tissues and attaching prosthetic materials can be a challenge. Suturing can be time-consuming, and staples can damage tissue. Surgical adhesives could solve these problems, but current options have limitations with strength, adhesion, and toxicity. Procedures performed on delicate tissues, such as in young infants, or on tissues that are moving, such as the heart, pose particular challenges. In addition, an ideal surgical adhesive would need to be water insoluble, as flowing blood would wash away a water-soluble compound.</p>
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<p>Inspired by the footpad of insects and the thick, sticky secretions of slugs and sandcastle worms, whose fluids can create bonds underwater, a research team led by Dr. Jeffrey Karp of Brigham and Women's Hospital and Dr. Pedro del Nido of Boston Children's Hospital set out to develop a similar gel-like material that could function as a stable, water-insoluble and elastic surgical glue. The work was funded in part by NIH’s National Heart, Lung, and Blood Institute (NHLBI), National Institute of General Medical Sciences (NIGMS), and National Institute of Dental and Craniofacial Research (NIDCR). The findings appeared online January 8, 2014, in <em>Science Translational Medicine</em>.</p>
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||
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||
<p>As their base, the scientists used a compound called poly(glycerol sebacate acrylate) (PGSA). PGSA is composed of glycerol, a basic building block of lipids, and sebacic acid, a naturally occurring fatty acid. When mixed with a special light-sensitive chemical, the resulting gel solidified upon a brief, 5-second exposure to ultraviolet (UV) light.</p>
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<p>The researchers found that the gel easily spread over a surface and adhered to tissues in wet conditions. When exposed to UV light, it “cured” to form an adhesive that was soft, elastic, and water-tight.</p>
|
||
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||
<p>The researchers extensively tested the glue in several settings. They found it had mechanical properties similar to arteries and the digestive tract. Patches coated with the glue stayed attached to the quickly beating hearts of rats without altering heart function. The scientists also successfully used the glue to seal a defect in the wall of a rat heart.</p>
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||
<p>The team next tested the glue in pigs, which have a heart rate similar to that of humans. They attached patches inside beating hearts and showed that the patches remained in place when heart rate and blood pressure increased. Using the glue alone, they were able to create a leak-proof seal in the carotid artery of pigs.</p>
|
||
|
||
<p>“This adhesive platform addresses all of the drawbacks of previous systems in that it works in the presence of blood and moving structures,” del Nido says. “It should provide the physician with a completely new, much simpler technology and a new paradigm for tissue reconstruction to improve the quality of life of patients following surgical procedures.”</p>
|
||
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||
<p>The technology has been licensed to a company, and patents based on the study have been filed. However, long-term experiments will be needed to further evaluate the gel before it can be tested in people.</p>
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||
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||
<p>—by Carol Torgan, Ph.D.</p>
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</div><h2 class="label-above">Related Links</h2><ul class="spaced print-urls"><li><a href="http://directorsblog.nih.gov/2013/05/02/spiny-worm-inspires-next-gen-band-aid/" target="_top">Spiny Worm Inspires Next-Gen Band-Aid</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/new-glue-marries-sticky-properties-geckos-mussels" target="_top">New “Glue” Marries Sticky Properties of Geckos and Mussels</a></li><li><a href="https://publications.nigms.nih.gov/insidelifescience/medical-materials.html" target="_top">Porcupine Quills, Gecko Feet and Spider Webs Inspire Medical Materials</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/making-lung-replacement" target="_top">Making a Lung Replacement</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/silk-helps-make-ultrathin-brain-interface" target="_top">Silk Helps Make Ultrathin Brain Interface</a></li></ul><p class="footnote"><strong class="label-inline">References: </strong><a href="http://www.ncbi.nlm.nih.gov/pubmed/24401941">A blood-resistant surgical glue for minimally invasive repair of vessels and heart defects</a>. Lang N, Pereira MJ, Lee Y, Friehs I, Vasilyev NV, Feins EN, Ablasser K, O'Cearbhaill ED, Xu C, Fabozzo A, Padera R, Wasserman S, Freudenthal F, Ferreira LS, Langer R, Karp JM, Del Nido PJ. <em>Sci Transl Med</em>. 2014 Jan 8;6(218):218ra6. doi: 10.1126/scitranslmed.3006557. PMID: 24401941.</p><p class="footnote"><strong class="label-inline">Funding: </strong>NIH’s National Heart, Lung, and Blood Institute (NHLBI), National Institute of General Medical Sciences (NIGMS), and National Institute of Dental and Craniofacial Research (NIDCR); Center for Integration of Medicine and Innovative Technology; Boston Children’s Hospital; Portuguese Foundation for Science and Technology; and the German Research Foundation.</p>
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<div about="/block/research-matters---popular-stori" class="ds-1col entity entity-bean bean-research-matters-block view-mode-default clearfix">
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<p><a href="https://www.nih.gov/news-events/nih-research-matters/research-context-can-we-slow-aging">Research in Context: Can we slow aging?</a></p>
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<p><a href="https://www.nih.gov/news-events/nih-research-matters/brain-changes-observed-during-pregnancy">Brain changes observed during pregnancy</a></p>
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<p><a href="https://www.nih.gov/news-events/nih-research-matters/research-context-detecting-cancer">Research in Context: Detecting cancer</a></p>
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<p><a href="https://www.nih.gov/news-events/nih-research-matters/risk-future-burden-dementia-united-states">Risk and future burden of dementia in the United States </a></p>
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||
|
||
<p><a href="https://www.nih.gov/news-events/nih-research-matters/complete-wiring-map-adult-fruit-fly-brain">Complete wiring map of an adult fruit fly brain</a></p>
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<h3 class="block__title">About NIH Research Matters</h3>
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<p><strong>Editor:</strong> Harrison Wein, Ph.D.</p>
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<p><strong>Assistant Editors:</strong> Vicki Contie and Brian Doctrow, Ph.D.</p>
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<p><strong><em>NIH Research Matters </em></strong>is a weekly update of NIH research highlights reviewed by NIH’s experts. It's published by the <a href="/institutes-nih/nih-office-director/office-communications-public-liaison">Office of Communications and Public Liaison</a> in the <a href="/institutes-nih/nih-office-director">NIH Office of the Director</a>.</p>
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<p>ISSN 2375-9593</p>
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