Thermo-Responsive Hydrogel Coatings on Polymer Surfaces for Controlled Cell Adhesion and Detachment

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چکیده

Polymere mit thermo-reversiblen Eigenschaften sind von großer Bedeutung für biomedizinische Anwendungen. Bekannte Vertreter sind Poly(N-isopropylacrylamid) (PNiPAAm) und Poly(N,N-diethylacrylamid) (PDEAAm) mit Übergangstemperaturen von 32 bis 33 °C. In der vorliegenden Arbeit wurden Copolymere dieser Materialien mit Poly(ethyleneglycol) (PEG) synthetisiert, um so die Übergangstemperatur in den physiologischen Bereich nahe 37 °C zu verschieben. Die Copolymere (PNiPAAm-g-PEG, PDEAAm-gPEG) wurden mittels Plasmaimmobilisierung als dünne Schicht auf Zellkulturträgern präpariert. Es konnte gezeigt werden, dass derartige Träger die schonende Ablösung adhärenter Zellen durch eine kurzzeitige Absenkung der Temperatur um wenige K gestatten.

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تاریخ انتشار 2004