报告人简介

刘润辉，教授、获国家杰出青年科学基金资助。2009年在美国普渡大学化学系获博士学位；2009年至2014年先后在美国加州理工学院和威斯康星大学-麦迪逊开展博士后研究；2014年底至今任华东理工大学教授。

内容简介

Natural proteins/peptides possess important biological functions and are widely studied for biomedical and tissue engineering applications. However, their drawbacks such as intolerance to enzymatic degradation, expensiveness and difficulty for large-scale synthesis limit the practical application. We hypothesize that synthetic polymers can mimic the sequence defined natural peptides to obtain important biological functions. We establish water-tolerant, fast and controllable polymerization method for convenient and scalable synthesis of amino acid polymers. By introducing unnatural amino acids, the resulting polymers resist proteolysis and have stable biological functions. Our recent studies demonstrate that our polymeric strategy is valid to mimic different types of natural peptides. By mimicking extra cellular matrix peptides, we discover amino acid polymers that promote osteoblast adhesion comparable to the gold standard RGD peptide, and show excellent in vivo bone repair function. By mimicking host defense peptide (HDP), we find polymers that have potent activity against drug-resistant bacteria and drug-resistant fungi, as well as low hemolysis and low cytotoxicity. The optimal antimicrobial polymers are comparable to, or even superior to, the performance of current antimicrobial drugs both in vitro and in vivo. Notably, these HDP-mimicking polymers don’t cause resistance in bacteria and fungi after continuous use. These studies indicate that peptide-mimicking polymers can have a wide range of applications as the next generation bioactive materials.