Abstract
Oligodendrocyte progenitor cells (OPCs) transplantation has been considered a promising treatment for spinal cord injury, according to previous studies. Recent research shed light on the importance of microRNA 219 (miR-219) in oligodendrocyte development, so here miR-219-overexpressing OPCs (miR-219 OPCs) were transplanted in animal models of spinal cord injury to evaluate the impact of miR-219 on oligodendrocyte differentiation and functional recovery in vivo. Our findings demonstrate that transplanted cells were distributed in the tissue sections and contributed to reducing the size of cavity in the injury site. Interestingly, miR-219 promoted OPC differentiation into mature oligodendrocyte expressing MBP in vivo whereas in absence of miR-219, less number of cells differentiated into mature oligodendrocytes. An eight week evaluation using the Basso Beattie Bresnahan (BBB) locomotor test confirmed improvement in functional recovery of hind limbs. Overall, this study demonstrated that miR-219 promoted differentiation and maturation of OPCs after transplantation and can be used in cell therapy of spinal cord injury.
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This study was funded by Tehran University of Medical Sciences (grant number 93-04-87-27710).
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Jafar Ai, Esmaeil Sadroddiny, and Bahareh Nazari designed the study. Bahareh Nazari, Zeinab Namjoo, and Fateme Moradi performed the practical parts of the study. Bahareh Nazari, Mansure Kazemi, and Somayeh Ebrahimi-Barough contribute to writing the manuscript. Esmaeil Sadroddiny, and Jafar Ai supervised the study. All authors read and approved the final manuscript.
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Nazari, B., Namjoo, Z., Moradi, F. et al. miR-219 overexpressing oligodendrocyte progenitor cells for treating compression spinal cord injury. Metab Brain Dis 36, 1069–1077 (2021). https://doi.org/10.1007/s11011-021-00701-y
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DOI: https://doi.org/10.1007/s11011-021-00701-y