期刊
BIOMACROMOLECULES
卷 16, 期 3, 页码 913-923出版社
AMER CHEMICAL SOC
DOI: 10.1021/bm5018244
关键词
-
资金
- Natural Sciences and Engineering Research Council of Canada
- Canadian Institutes of Health Research in the form of CHRP
- Canada Foundation of Innovation (CFI)
- CFI
- British Columbia Knowledge Development Fund
- Michael Smith Foundation for Health Research (MSFHR)
Aurein 2.2 is an antimicrobial peptide (AMP) whose mechanism of action is quite well-understood and that has good activity against Gram-positive bacteria. It is, however, highly cytotoxic. Poly(ethylene glycol) (PEG) conjugation (PEGylation) of protein and peptide drugs has been used for decades to improve their in vivo efficacy and blood circulation by enhancing the biocompatibility of the protein or peptide in question. However, the relatively large hydrodynamic size, high intrinsic viscosity, the limited number of functional groups available for conjugation, and immunogenicity of high molecular weight PEG limits its use in bioconjugation applications. Recently, hyperbranched polyglycerol (HPG) has been gaining attention as an alternative to PEG due to its excellent biocompatibility. Here, for the first time, we report the synthesis of HPG conjugates of antimicrobial peptides. Aurein 2.2 peptide was conjugated to high molecular weight HPG with a varying number of peptides per polymer, and the biocompatibility and antimicrobial activity of the conjugates were investigated. The antimicrobial activity of the peptide and its conjugates were determined by measuring the minimal inhibitory concentration (MIC) against Staphylococcus aureus and Staphylococcus epidermidis. The interaction of aurein 2.2 peptide and the conjugates with a model bacterial biomembrane was investigated using CD spectroscopy to understand the mode of action of the conjugates. The biocompatibility of the AMP-polymer conjugates was investigated by measuring red cell lysis, platelet activation and aggregation, complement activation, blood coagulation, and cell toxicity. Our results show that the size of the conjugates and the peptide density influence the biocompatibility of the antimicrobial conjugates. These results will help to further define the properties of HPG-AMP conjugates and set the stage for development of better therapeutic agents.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据