Abstract
The present study compared the short-term and long-term neuroprotective and neurobehavioral effects of transforming growth factor beta-1 (TGF beta-1) after hypoxic-ischemic injury in adult rats. TGF beta-1 (10 ng) or vehicle were administered intracerebroventricularly (i.c.v.) 2 h after hypoxia-ischemia. Adhesive removal test was assessed after 10 or 40 days, and the neuronal outcome then determined. TGF beta-1 significantly increased the area of intact cortex compared with vehicle 10 days after the injury, with a significant improvement in neurological function. In contrast, after 40 days recovery TGFbeta-1 neither improved neuronal outcome nor neurological function, suggesting TGFbeta-1 can transiently improve functional and histological recovery from hypoxia-ischemia.
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