Combinatorial synthesis of redox-responsive cationic polypeptoids for intracellular protein delivery application  

作　　者：Zhicheng Le Tong Xiao Zhijia Liu Xingliang Liu Hong Liu Lixin Liu Yongming Chen 

机构地区：[1]School of Materials Science and Engineering,Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education,GD Research Center for Functional Biomaterials Engineering and Technology,Sun Yat-sen University,Guangzhou 510275,China

出　　处：《Science China Chemistry》2020年第11期1619-1625,共7页中国科学（化学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(51803243,51820105004);the Guangdong Basic and Applied Basic Research Foundation(2020A1515011285);the Guangdong Innovative and Entrepreneurial Research Team Program(2013S086).

摘　　要：Biologics play an essential role in treating various indications from cancers to the metabolic diseases,while the current development of new classes of intracellular-acting protein drugs is still hindered because of high molecular mass and overall hydrophilicity of proteins creating extremely poor permeability across cell membrane.Hence,there remains an unmet need to develop safe,potent approaches to augment intracellular protein delivery efficiency.Here,we described a facile multicomponent reaction system for generating a small library of redox-responsive cationic polypeptoids with high biocompatibility.The co-assembly of optimized polymer with protein leads to the formation of compacted nanocomplexes with smaller size and high encapsulation efficiency,thus improving cellular internalization via the macropinocytosis and/or caveolae-mediated endocytosis mainly.After endo-lysosomal escape,the nanocomplexes can be disassociated to efficiently release cargo proteins into the cytosol,owing to the intracellular glutathione(GSH)-triggered rapid cleavage of disulfide bonds in polymers backbone.As a result,we screened a promising platform reagent for efficient cytosolic protein delivery application.

关 键 词：multicomponent reaction cationic polypeptoid redox-responsive intracellular delivery PROTEIN 

分 类 号：TQ464.7[化学工程—制药化工]