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Inspiration from a porcupine's quills
Date:12/10/2012

CAMBRIDGE, MA -- Anyone unfortunate enough to encounter a porcupine's quills knows that once they go in, they are extremely difficult to remove. Researchers at MIT and Brigham and Women's Hospital now hope to exploit the porcupine quill's unique properties to develop new types of adhesives, needles and other medical devices.

In a new study, the researchers characterized, for the first time, the forces needed for quills to enter and exit the skin. They also created artificial devices with the same mechanical features as the quills, raising the possibility of designing less-painful needles, or adhesives that can bind internal tissues more securely.

There is a great need for such adhesives, especially for patients who have undergone gastric-bypass surgery or other types of gastric or intestinal surgery, according to the researchers. These surgical incisions are now sealed with sutures or staples, which can leak and cause complications.

"With further research, biomaterials modeled based on porcupine quills could provide a new class of adhesive materials," says Robert Langer, the David H. Koch Institute Professor at MIT and a senior author of the study, which appears this week in the Proceedings of the National Academy of Sciences.

Jeffrey Karp, an associate professor of medicine at Harvard Medical School and co-director of the Center for Regenerative Therapeutics at Brigham and Women's Hospital, is also a senior author of the paper. Lead author is Woo Kyung Cho, a postdoc in the Harvard-MIT Division of Health Sciences and Technology (HST).

Borrowing from nature

Aside from stitches and sutures, doctors sometimes use medical-grade superglue to bind tissue together, Karp says. However, those glues can be toxic, or provoke an inflammatory response.

To create adhesives that would work in the body without producing adverse reactions, the research team turned to nature for inspiration. "We beli
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Contact: Sarah McDonnell
s_mcd@mit.edu
617-253-8923
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

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