In vitro release kinetics of biologically active transforming growth factor-beta 1 from a novel porous glass carrier

Biomaterials
S B NicollP Ducheyne

Abstract

Sol-gel silica-based porous glass (xerogel) was used as a novel carrier material for recombinant human transforming growth factor-beta 1 (TGF-beta 1). Room temperature synthesis procedures included sol preparation, the addition of TGF-beta 1 solution to the sol, subsequent gelation and drying. After determination of optimal synthesis parameters, the material was assayed in vitro for its ability to release biologically active TGF-beta 1 in a controlled manner. Sustained release of TGF-beta 1 over a 7-day period was demonstrated. On the basis of published TGF-beta 1 potency, the amount released is capable of eliciting bone tissue reactivity. These findings suggest that this novel glass-growth factor composite may serve as an effective bone graft material for the repair of osseous defects.

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