Synthetic hydrogels formed by thiol-ene crosslinking of vinyl sulfone-functional poly(methyl vinyl ether-alt-maleic acid) with α,ω-dithio-polyethyleneglycol

被引:23
作者
Stewart, S. A. [1 ]
Coulson, M. B. [1 ]
Zhou, C. [1 ]
Burke, N. A. D. [1 ]
Stover, H. D. H. [1 ]
机构
[1] McMaster Univ, Dept Chem & Chem Biol, Hamilton, ON L8S 4M1, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
CELL ENCAPSULATION; MICHAEL ADDITION; CLICK REACTION; DRUG-DELIVERY; POLY(ETHYLENE GLYCOL); PROTEIN RELEASE; DEGRADATION; CHEMISTRY; POLYMERS; MATRIX;
D O I
10.1039/c8sm01066h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Polymer hydrogels formed by rapid thiol-ene coupling of macromolecular gel formers can offer access to versatile new matrices. This paper describes the efficient synthesis of cysteamine vinyl sulfone (CVS) trifluoroacetate, and its incorporation into poly(methyl vinyl ether-alt-maleic anhydride) (PMMAn) to form a series of CVS-functionalized poly(methyl vinyl ether-alt-maleic acid) polymers (PMM-CVSx) containing 10 to 30 mol% pendant vinyl sulfone groups. Aqueous mixtures of these PMM-CVS and a dithiol crosslinker, alpha,omega-dithio-polyethyleneglycol (HS-PEG-SH, M-n = 1 kDa), gelled through crosslinking by Michael addition within seconds to minutes, depending on pH, degree of functionalization, and polymer loading. Gelation efficiency, Young's modulus, equilibrium swelling and hydrolytic stability are described, and step-wise hydrogel post-functionalization with a small molecule thiol, cysteamine, was demonstrated. Cytocompatibility of these crosslinked hydrogels towards entrapped 3T3 fibroblasts was confirmed using a live/dead fluorescence assay.
引用
收藏
页码:8317 / 8324
页数:8
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