Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 24, Pages 9586-9593Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202000416
Keywords
materials science; peptides; polymers; self-assembly; surface chemistry
Categories
Funding
- National Natural Science Foundation of China for Innovative Research Groups [51621002]
- National Natural Science Foundation of China [21774031, 21861162010, 21776070]
- National Key Research and Development Program of China [2016YFC1100401]
- Natural Science Foundation of Shanghai [18ZR1410300]
- Research program of State Key Laboratory of Bioreactor Engineering
- Fundamental Research Funds for the Central Universities [22221818014]
- Shanghai Rising Star Program [19QA1402400]
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The functions of implants like medical devices are often compromised by the host's foreign-body response (FBR). Herein, we report the development of low-FBR materials inspired by serine-rich sericin from silk. Poly-beta-homoserine (beta-HS) materials consist of the hydrophilic unnatural amino acid beta-homoserine. Self-assembled monolayers (SAMs) of beta-HS resist adsorption by diverse proteins, as well as adhesion by cells, platelets, and diverse microbes. Experiments lasting up to 3 months revealed that, while implantation with control PEG hydrogels induced obvious inflammatory responses, collagen encapsulation, and macrophage accumulation, these responses were minimal with beta-HS hydrogels. Strikingly, the beta-HS hydrogels induce angiogenesis in implant-adjacent tissues. Molecular dynamics simulations indicated that the low FBR performance of beta-HS results from what we term dual hydrogen bonding hydration, wherein both the backbone amide groups and the sidechain hydroxyl groups of beta-HS undergo hydration.
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