ヤマト マサユキ   Yamato Masayuki
  大和 雅之
   所属   医学研究科 医学研究科 (医学部医学科をご参照ください)
   職種   教授
論文種別 原著
言語種別 英語
査読の有無 査読あり
表題 Water Stable Nanocoatings of Poly(N-isopropylacrylamide)-based Block Copolymers on Culture Insert Membrane for Temperature-Controlled Cell Adhesion
掲載誌名 正式名:Journal of materials chemistry. B.
略  称:J Mater Chem B
ISSNコード:2050750X/20507518
掲載区分国外
出版社 Royal Society of Chemistry
巻・号・頁 8(34),pp.7812-7821
著者・共著者 NAKAYAMA Masamichi†*, TOYOSHIMA Yuki, CHINEN Hiroshi, KIKUCHI Akihiko, YAMATO Masayuki, OKANO Teruo
発行年月 2020/07/17
概要 This study demonstrated the spin-coating of functional diblock copolymers to develop smart culture inserts for thermoresponsive cell adhesion/detachment control. One part of the block components, the poly(n-butyl methacrylate) block, strongly supported the water stable surface-immobilization of the thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) block, regardless of temperature. The chain length of the PNIPAAm blocks was varied to regulate thermal surface functions. Immobilized PNIPAAm concentrations became larger with increasing chain length (1.0–1.6 μg cm−2) and the thicknesses of individual layers were relatively comparable at 10-odd nanometers. A nanothin coating scarcely inhibited the permeability of the original porous membrane. When human fibroblasts were cultured on each surface at 37 °C, the efficiencies of cell adhesion and proliferation decreased with longer PNIPAAm chains. Meanwhile, by reducing the temperature to 20 °C, longer PNIPAAm chains promoted cell detachment owing to the significant thermoresponsive alteration of cell-surface affinity. Consequently, we successfully produced a favorable cell sheet by choosing an appropriate PNIPAAm length for block copolymers.
DOI 10.1039/D0TB01113D