title: Effect of end groups of poly(n-butyl methacrylate) on its biocompatibility.
abstract: Telechelic poly(n-butyl methacrylate)s (PBMAs) with various end groups were prepared using nonionic, anionic, cationic or zwitterionic azo-type radical initiators and cell adhesion onto the surfaces of the polymers was investigated. The tendency for cell adhesion to the polymers differed with and without pretreatment with phosphate-buffered saline (PBS, pH 7.4). The cell adhesion to polymer surfaces without pretreatment was lower than that with pretreatment. The effect of pretreatment with PBS was significant for PBMA with ionic end groups. Furthermore, cell adhesion to the surface of PBMA with zwitterionic end groups was suppressed compared with that to the surfaces of other polymers. It was presumed that positive and negative charges of zwitterionic groups in the same molecule negated each other at pH 7.4 and that the polymers with zwitterionic end groups had no effective charges. The results clearly indicated that biocompatibility of polymers can be changed by the introduction of functional groups at the ends of the polymer chains. Fabrication of functional material surfaces will be anticipated by the similar method in the future.
authors.affiliation: Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
authors.forename: Shigeto
authors.initials: S
authors.lastname: Fujishita
authors.forename: Chika
authors.initials: C
authors.lastname: Inaba
authors.forename: Takuya
authors.initials: T
authors.lastname: Ishisaka
authors.forename: Makoto
authors.initials: M
authors.lastname: Gemmei-Ide
authors.forename: Hiromi
authors.initials: H
authors.lastname: Kitano
mesh_terms: D000388:Air; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry / Q000494:pharmacology*; D002448:Cell Adhesion / Q000187:drug effects; D006224:Cricetinae; D003412:Cricetulus; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry*; D013499:Surface Properties / Q000187:drug effects; D013696:Temperature
chemical_list: D001672:Biocompatible Materials; D011108:Polymers; D011109:Polymethacrylic Acids; C068872:polybutyl methacrylate