Biomimetic cryptic site surfaces for reversible chemo- and cyto-mechanoresponsive substrates.
Fiche publication
Date publication
avril 2013
Auteurs
Membres identifiés du Cancéropôle Est :
Dr ANSELME Karine, Dr FRISCH Benoit, Pr SCHAAF Pierre
Tous les auteurs :
Bacharouche J, Badique F, Fahs A, Spanedda MV, Geissler A, Malval JP, Vallat MF, Anselme K, Francius G, Frisch B, Hemmerle J, Schaaf P, Roucoules V
Lien Pubmed
Résumé
Chemo-mechanotransduction, the way by which mechanical forces are transformed into chemical signals, plays a fundamental role in many biological processes. The first step of mechanotransduction often relies on exposure, under stretching, of cryptic sites buried in adhesion proteins. Likewise, here we report the first example of synthetic surfaces allowing for specific and fully reversible adhesion of proteins or cells promoted by mechanical action. Silicone sheets are first plasma treated and then functionalized by grafting sequentially under stretching poly(ethylene glycol) (PEG) chains and biotin or arginine-glycine-aspartic acid (RGD) peptides. At unstretched position, these ligands are not accessible for their receptors. Under a mechanical deformation, the surface becomes specifically interactive to streptavidin, biotin antibodies, or adherent for cells, the interactions both for proteins and cells being fully reversible by stretching/unstretching, revealing a reversible exposure process of the ligands. By varying the degree of stretching, the amount of interacting proteins can be varied continuously.
Référence
ACS Nano. 2013 Apr 23;7(4):3457-65