Thermo-Responsive Hydrogel Coatings on Polymer Surfaces for Controlled Cell Adhesion and Detachment
ثبت نشده
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.
منابع مشابه
Thermo-responsive cell culture carrier: Effects on macrophage functionality and detachment efficiency
Harvesting cultivated macrophages for tissue engineering purposes by enzymatic digestion of cell adhesion molecules can potentially result in unintended activation, altered function, or behavior of these cells. Thermo-responsive polymer is a promising tool that allows for gentle macrophage detachment without artificial activation prior to subculture within engineered tissue constructs. We there...
متن کاملARGET–ATRP Synthesis and Characterization of PNIPAAm Brushes for Quantitative Cell Detachment Studies
Stimuli responsive (or "smart") polymer brushes represent a non-toxic approach for achieving release of biofouling layers. Thermo-responsive poly(N-isopropylacrylamide) (PNIPAAm) polymer brushes have been shown to modulate bacterial adhesion and release through transition between temperatures above and below the lower critical solution temperature (LCST ~32 °C) of PNIPAAm in water. In this arti...
متن کاملTough Bonding of Hydrogels to Diverse Nonporous Surfaces
In many animals, the bonding of tendon and cartilage to bone is extremely tough (for example, interfacial toughness ∼800 J m(-2); refs ,), yet such tough interfaces have not been achieved between synthetic hydrogels and non-porous surfaces of engineered solids. Here, we report a strategy to design tough transparent and conductive bonding of synthetic hydrogels containing 90% water to non-porous...
متن کاملOn the Interaction of Adherent Cells with Thermoresponsive Polymer Coatings
Thermoresponsive polymer coatings allow the control of adhesion of cells on synthetic substrates. In particular, decreasing the temperature below the lower critical solution temperature (LCST) of the polymer triggers the non-invasive detachment of cells from their cultivation substrate. Widening the range of applications of these coatings in cellular biotechnology requires a better understandin...
متن کاملThermo-Responsive Hydrogel-Coated Gold Nanoshells for In Vivo Drug Delivery
This paper describes the preparation and characterization of a new type of composite nanoparticle, where the structure consists of a nontoxic hydrogel polymer network that encapsulates a gold shell/silica core. These composite nanoparticles are being developed as photothermally responsive drug-delivery vehicles that undergo structural changes slightly above physiological temperature. A unique p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004