Author Interviews, Brigham & Women's - Harvard, Gastrointestinal Disease, Technology / 27.08.2020
Harvard Bioengineers Develop Synthetic Intestinal Lining to Deliver Drugs, Aid Digestion
MedicalResearch.com Interview with:
Giovanni Traverso, MB, BChir, PhD
Gastroenterologist and biomedical engineer
Division of Gastroenterology at BWH
Instructor of medicine at Harvard Medical School
MedicalResearch.com: What is the background for this study?
Response: We began working on this project with the goal to develop liquid drug formulations that could offer an easier-to-swallow alternative to capsules, especially for children. We started to think about whether we could develop liquid formulations that could form a synthetic epithelial lining that could then be used for drug delivery, making it easier for the patient to receive the medication by providing drugs in extended release formats.
We discovered that an enzyme called catalase could help assemble molecules of dopamine into the polymer (poly-dopamine). These polymers have muco-adhesion properties, which means that after polymerization, the polymer can attach to the tissue very strongly. Also, catalase is found throughout the digestive tract, with especially high levels in the upper region of the small intestine. This is the first example, to the best of our knowledge, of small intestinal targeting system enabled through in-situ tissue-enzyme-catalyzed polymerization.
The coating lasts up to 24 hours, after which it is shed and excreted based on experiments we conducted in pigs.
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