alexa Transplants of human mesenchymal stem cells improve functional recovery after spinal cord injury in the rat.
Engineering

Engineering

Advances in Robotics & Automation

Author(s): Czkov D, Rosocha J, Vanick I, Jergov S, Czek M

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Abstract Human mesenchymal stem cells (hMSCs) derived from adult bone marrow represent a potentially useful source of cells for cell replacement therapy after nervous tissue damage. They can be expanded in culture and reintroduced into patients as autografts or allografts with unique immunologic properties. The aim of the present study was to investigate (i) survival, migration, differentiation properties of hMSCs transplanted into non-immunosuppressed rats after spinal cord injury (SCI) and (ii) impact of hMSC transplantation on functional recovery. Seven days after SCI, rats received i.v. injection of hMSCs (2x10(6) in 0.5 mL DMEM) isolated from adult healthy donors. Functional recovery was assessed by Basso-Beattie-Bresnahan (BBB) score weekly for 28 days. Our results showed gradual improvement of locomotor function in transplanted rats with statistically significant differences at 21 and 28 days. Immunocytochemical analysis using human nuclei (NUMA) and BrdU antibodies confirmed survival and migration of hMSCs into the injury site. Transplanted cells were found to infiltrate mainly into the ventrolateral white matter tracts, spreading also to adjacent segments located rostro-caudaly to the injury epicenter. In double-stained preparations, hMSCs were found to differentiate into oligodendrocytes (APC), but not into cells expressing neuronal markers (NeuN). Accumulation of GAP-43 regrowing axons within damaged white matter tracts after transplantation was observed. Our findings indicate that hMSCs may facilitate recovery from spinal cord injury by remyelinating spared white matter tracts and/or by enhancing axonal growth. In addition, low immunogenicity of hMSCs was confirmed by survival of donor cells without immunosuppressive treatment. This article was published in Cell Mol Neurobiol and referenced in Advances in Robotics & Automation

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