Abstract
Biodegradable sheets loaded with basic fibroblast growth factor (bFGF) are prepared as novel bFGF-releasing systems from polyglycolic acid nonwoven fabric by oxygen plasma treatment followed by bFGF adsorption. In the present study, we investigated the therapeutic effects of this system on a focal cerebral infarction model (CB-17 mouse). A preliminary in vitro study showed that this system released bFGF in an acellular culture medium, thereby keeping the bFGF concentration in the medium at ≥5ng/ml for a prolonged period of 7 days. The released bFGF from this system retained its biological activity to enhance endothelial tube formation in vitro. In a mouse model of subacute focal cerebral infarction, this system increased the expression of endogenous vascular endothelial growth factor in the peri-infarct cortex and subventricular zone, promoted angiogenesis in the striatum, and increased neural progenitor cells in the peri-infarct cortex. Thus, this bFGF-releasing system has the potential to be a novel therapeutic approach for cerebral infarction.
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