The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2021
Filed:
Dec. 03, 2018
Jiangnan University, Jiangsu, CN;
Liping Zhang, Jiangsu, CN;
Caihua Ni, Jiangsu, CN;
Ren Liu, Jiangsu, CN;
Dawei Wang, Jiangsu, CN;
Gang Shi, Jiangsu, CN;
Xinxin Sang, Jiangsu, CN;
Xiaofeng Xia, Jiangsu, CN;
JIANGNAN UNIVERSITY, Jiangsu, CN;
Abstract
The invention discloses a preparation method of pH/reduction responsive polyamino acid zwitterionic nanoparticles, which belongs to the technical field of polymer synthesis and biomedical materials. In the invention aliphatic amines are used to initiate ring-opening polymerization of γ-benzyl-L-glutamate-N-carboxylic anhydride, and the obtained poly(γ-benzyl-L-glutamate) reacts with L-lysine to form azwitterionic polymer. The zwitterionic polymer is crosslinked by cysteamine, producing pH/reduction responsive polyamino acid zwitterionic nanoparticles after purification. The nanoparticles are pH responsive and resistant to non-specific protein adsorption. Because cysteamine contains disulfide bonds, the nanoparticles have sensitive reductive responsiveness and can load anticancer drugs for controlled release at the target site of cancer.