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Successful treatment of a brain infection requires aspiration of the pus or excision of the abscess, followed by long-term (usually 4-8 weeks) parenteral antibiotic treatment. Local antibiotic delivery using biodegradable drug-impregnated carriers is effective in treating postoperative infections, thereby reducing the toxicity associated with parenteral antibiotic treatment and the expense involved with long-term hospitalization. We have developed vancomycin-loaded, biodegradable poly[lactic-co-glycol acid] nanofibrous membranes for the sustainable delivery of vancomycin to the brain tissue of rats by using the electrospinning technique. A high-performance liquid chromatography assay was employed to characterize the in vitro and in vivo release behaviors of pharmaceuticals from the membranes. The experimental results suggested that the biodegradable nanofibers can release high concentrations of vancomycin for more than 8 weeks in the cerebral cavity of rats. Furthermore, the membranes can cover the wall of the cavity after the removal of abscess more completely and achieve better drug delivery without inducing adverse mass effects in the brain. Histological examination also showed no inflammation reaction of the brain tissues. By adopting the biodegradable, nanofibrous drug-eluting membranes, we will be able to achieve long-term deliveries of various antibiotics in the cerebral cavity to enhance the therapeutic efficacy of cerebral infections.

acs chemical neuroscience

Biodegradable Drug-Eluting Poly[lactic-<i>co</i>-glycol acid] Nanofibers for the Sustainable Delivery of Vancomycin to Brain Tissue: In Vitro and in Vivo Studies

Biodegradable Drug-Eluting Poly[lactic-co-glycol acid] Nanofibers for the Sustainable Delivery of Vancomycin to Brain Tissue: In Vitro and in Vivo Studies