alexa Effects of bone-marrow mesenchymal stem cells transplanted into vitreous cavity of rat injured by ischemia reperfusion.
Surgery

Surgery

Journal of Transplantation Technologies & Research

Author(s): Li N, Li XR, Yuan JQ

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Abstract OBJECTIVE: To examine the survival, migration, integration, differentiation and the expression of various neurotrophic factors of bone-marrow mesenchymal stem cells (BMSCs) transplanted into the vitreous cavity of rats injured by ischemia/reperfusion(I/R). METHODS: The BMSCs were separated from rat marrow using the wall-sticking method, and cultured in vitro to expand. Flow cytometry detected the surface antigens of BMSCs. Ninety-six rats were randomly divided into four groups: normal control injected PBS(C+P), normal control injected BMSCs (C+B), ischemic/reperfusion injected PBS(I/R+P)and ischemic/reperfusion injected BMSCs(I/R+B). After retinal I/R injury was induced in each group by increasing intraocular pressure, 10 microl PBS and BMSC suspensions labeled by red fluorescence CM-Dil were immediately injected into the vitreous cavity. We observed the survival, migration and integration of BMSCs using confocal microscopy. The differentiation and expression of basic fibroblast growth factor (bFGF), brain-derived neurotrophic factor (BDNF) and ciliary neurotrophic factor (CNTF) of CM-Dil-labeled BMSCs were detected by immunofluorescent labeling and reserved by confocal microscopy. The expression of mRNA and proteins of bFGF, BDNF and CNTF were assayed by RT-PCR and Western Blot respectively. RESULTS: After transplantation to normal eyes, BMSCs labeled by CM-Dil were mostly present in the vitreous cavity, and did not migrate. After transplantation to I/R eyes, BMSCs labeled by CM-Dil were mostly present along with the inner limiting membrane. Only a few cells were integrated into the ganglion cell layer. Two or 4 weeks after transplantation, a few BMSCs labeled by CM-Dil were observed to express markers of neuron- neurone specific enolase (NSE), neurofilament (NF) and various neurotrophic factors. The BMSC-injected I/R model eyes showed less reduction in the number of RGCs than that of the I/R eyes with PBS injection. CONCLUSIONS: BMSC transplantation is a valuable neuroprotection tool for the treatment of retina and optic nerve diseases. This article was published in Graefes Arch Clin Exp Ophthalmol and referenced in Journal of Transplantation Technologies & Research

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