Mixed Copolymer Adlayers Allowing Reversible Thermal Control of Single Cell Aspect Ratio

F. Dalier (1) , G. V Dubacheva (1) , M. Coniel (1) , D. Zanchi (1) , A. Galtayries , M. Piel , E. Marie (1) , C. Tribet (1)

1 PASTEUR - Processus d'Activation Sélective par Transfert d'Energie Uni-électronique ou Radiatif (UMR 8640)

Dynamic guidance of living cells is achieved by fine-tuning and spatiotemporal modulation on artificial polymer layers enabling reversible peptide display. Adjustment of surface composition and interactions is obtained by coadsorption of mixed poly(lysine) derivatives, grafted with either repellent PEG, RGD adhesion peptides, or T-responsive poly(N-isopropylacrylamide) strands. Deposition of mixed adlayers provides a straightforward mean to optimize complex substrates, which is here implemented to achieve (1) thermal control of ligand accessibility and (2) adjustment of relative adhesiveness between adjacent micropatterns, while preserving cell attachment during thermal cycles. The reversible polarization of HeLa cells along orthogonal stripes mimics guidance along natural matrices.

Mots clés: cell adhesion; micropatterning; cell polarization; poly(lysine); poly(N-isopropylacrylamide); peptide display

Domaines: Polymères; Biotechnologies; Interactions cellulaires [q-bio.CB]

F. Dalier, G. V Dubacheva, M. Coniel, D. Zanchi, A. Galtayries, et al.. Mixed Copolymer Adlayers Allowing Reversible Thermal Control of Single Cell Aspect Ratio. ACS Applied Materials & Interfaces, 2018, 10 (3), pp.2253-2258. ⟨10.1021/acsami.7b18513⟩. ⟨hal-01730742⟩