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	Preparation of thermoresponsive polymer brush surfaces and their interaction with cells.
掲載誌名	正式名：Biomaterials 略　 称：Biomaterials ISSNコード：(0142-9612)0142-9612(Linking)
掲載区分	国外
巻・号・頁	29(13),pp.2073-81
著者・共著者	Mizutani Aya†, Kikuchi Akihiko, Yamato Masayuki, Kanazawa Hideko, Okano Teruo*
発行年月	2008/05
概要	Poly(N-isopropylacrylamide) (PIPAAm) brush surfaces with different layer thickness on polystyrene substrates were prepared by surface-initiated atom transfer radical polymerization (ATRP). Surface characteristics of PIPAAm brushes and their influence on adhesion and detachment of bovine carotid artery endothelial cells (ECs) were controlled by PIPAAm layer thickness. Surface hydrophilicity increased with PIPAAm layer thickness at 37 degrees C because PIPAAm brush surfaces with higher thickness provide more extended chain conformations with relatively high chain mobility, and accompanying polymer chain hydration. These surface property alterations lead to negligible cell adhesion through minimal matrix protein adsorption and also modified surface modulus. By adjusting polymerization reaction conditions and time, polymer layers supporting confluent cultures of ECs were possible. Confluent EC monolayers spontaneously detached as contiguous cell sheets from PIPAAm brush surfaces at reduced temperatures. Thermoresponsive cell adhesion and detachment behavior were analyzed from the standpoint of surface physicochemical characteristics. Thermoresponsive surfaces prepared by surface-initiated ATRP techniques allow surface selection in preparing cell sheets from attachment-dependent cells having relatively strong adhesive property for tissue engineering applications.
DOI	10.1016/j.biomaterials.2008.01.004
PMID	18261791