The neuroprotective effect of mesenchymal stem cells on an experimentally induced model for multiple sclerosis in mice

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Abstract
Multiple sclerosis (MS) is a chronic autoimmune demyelinating neurodegenerative central nervous system disorder. The aim of the present study was to investigate the prophylactic effect exerted by the one-time intraperitoneal injection of mesenchymal stem cells (MSCs) 1 × 106 and 14-day intraperitoneal injection of methylprednisolone (MP) 40 mg/kg in an experimental autoimmune encephalomyelitis (EAE). EAE was induced by intradermal injection of rat spinal cord homogenate with complete Freund's adjuvant in Swiss mice. Results of MSCs and MP-treated mice showed a significantly milder disease and fewer clinical scores compared to control mice. They suppressed tumor necrosis factor-alpha and myeloperoxidase and increased interleukin 10, whereas thiobarbituric acid reactive substances and nitric oxide brain contents were reduced to comparable levels between treatment groups. Brain content of GSH was significantly higher in MSCs-treated mice than control mice. It is evident that MSCs have relevant prophylactic effect in an animal model of MS and might represent a valuable tool for stem cell based therapy in MS.

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