The interaction of cultured cells with membranes composed of random and block copolypeptides

✍ Scribed by Minoura, Norihiko ;Aiba, Sei-ichi ;Fujiwara, Yukihiko ;Koshizaki, Naoto ;Imai, Yohji

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 711 KB
• Volume: 23
• Category: Article
• ISSN: 0021-9304
• DOI: 10.1002/jbm.820230210

✦ Synopsis

Random copolypeptides and block copolypeptides were synthesized, and an interaction between these polypeptide membranes and the cells was studied by a cell culture method (cell line, Ca. 9.22).

In random copolypeptides composed of y-methyl L-glutamate and y-benzyl L-glutamate, cell attachment and cell growth depended on the monomer composition, a n d s h o w e d a m a x i m u m a t a r o u n d 70 mole % of benzyl glutamate. Block copolypeptide composed of L-methionine and oxyethylene exhibited low cell attachment and cell growth even at 10 mole % of oxyethylene content, compared to L-methionine homopolymer. ESCA study of the membrane suggested this result to be due to concentration of the poly(oxyethylene) block chain of the polymer on the surface of the membrane. Block copolypeptide composed of N5-(3-hydroxy p r o p y l ) L-glutamine a n d L-leucine exhibited low cell attachment and cell growth, while the corresponding random copolypeptide exhibited high cell attachment and cell growth. This difference is attributable to the microheterophase structure with the hydrophilic domains embedded in the hydrophobic matrix in the block copolypeptide membrane.