Accelerated wound healing by in vivo application of keratinocytes overexpressing KGF

Molecular Therapy : the Journal of the American Society of Gene Therapy
Jürgen KoppR E Horch

Abstract

Epidermal regeneration is a complex process, strongly influenced by growth factors, including keratinocyte growth factor (KGF). The objective of this study was to establish immortalized HaCaT keratinocytes and KMST-6-fibroblasts stably expressing KGF. Transfection efficiency, genomic integration, and functionality of the transgene were determined by ELISA and PCR, and KGF-expressing clones were selected using an air-liquid interface test system. HaCaT cells displayed stronger transgene expression compared to transfected fibroblasts, and the most effective HaCaT clone was incubated on a membrane carrier to form a "membrane cell graft." Twenty-one superficial second-degree burn wounds were created in each of three pigs, and wound healing capacity of the generated "polypeptide cell delivery system" after grafting was examined. Untransfected HaCaT keratinocytes and membrane-covered and untreated burn wounds served as controls. Histological and macroscopical follow-up revealed that grafting of transfected HaCaT cells resulted in complete reepithelialization within 5 days, while wounds covered with untransfected cells needed 2 days longer. At untreated sites, a thin epithelium was detectable after 10 days. The results indicate that w...Continue Reading

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