Thermo-responsive poly(NiPAAm-co-DEGMA) substrates for gentle harvest of human corneal endothelial cell sheets

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

Gentle harvesting of corneal endothelial cell sheets grown in culture is of interest for the development of cornea replacement strategies. Thin films of a fast responding copolymer of N-isopropylacrylamide (NiPAAm) and diethyleneglycol methacrylate (DEGMA) with a phase transition temperature of 32 degrees C were prepared and evaluated for that purpose. The polymer layers were immobilized onto fluorocarbon substrates using low pressure argon plasma treatment. Cell culture and detachment experiments were performed with L929 mouse fibroblasts and human corneal endothelial cells (HCEC) at standard conditions. The hydrogel-coated supports were found to permit adhesion, spreading, and proliferation of both cell types. Harvesting of cell sheets was achieved upon lowering the temperature to about 30 degrees C. The formation of a closed monolayer as a crucial prerequisite for maintaining ionic pump function in HCEC was proven by ZO-1 immunostainung. Labeling of fibronectin indicated that the vast majority of the extracellular matrix is detached from the hydrogel coatings together with the cell layer. Inspired by this result, the reuse of the hydrogel-coated culture carriers was investigated confirming the suitability of the substrates for repeated cell harvesting. Altogether, the introduced thermoresponsive coating was found advantageous for the efficient generation of HCEC sheets and will be further utilized in transplantation strategies.

Details

OriginalspracheEnglisch
Seiten (von - bis)1003-10
Seitenumfang8
FachzeitschriftJournal of biomedical materials research. Part A
Jahrgang80
Ausgabenummer4
PublikationsstatusVeröffentlicht - 15 März 2007
Peer-Review-StatusJa

Externe IDs

Scopus 33847204989
ORCID /0000-0003-3205-1876/work/142256458
ORCID /0000-0002-4531-691X/work/148607592
ORCID /0000-0003-0189-3448/work/159607168

Schlagworte

Schlagwörter

  • Animals, Cell Adhesion, Cell Culture Techniques, Cell Line, Transformed, Coated Materials, Biocompatible, Cornea/cytology, Corneal Diseases/therapy, Endothelial Cells/cytology, Fibroblasts/cytology, Humans, Methacrylates/chemistry, Mice, Polymethacrylic Acids/chemistry, Tissue Engineering