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miR-17-92 facilitates neuronal differentiation of transplanted neural stem/precursor cells under neuroinflammatory conditions.
- Source :
-
Journal of neuroinflammation [J Neuroinflammation] 2016 Aug 27; Vol. 13 (1), pp. 208. Date of Electronic Publication: 2016 Aug 27. - Publication Year :
- 2016
-
Abstract
- Background: Neural stem/precursor cells (NSCs) are of particular interest because of their potential application in cell therapy for brain damage. However, most brain injury cases are followed with neuroinflammatory stress, which affects the lineage selection of grafted NSCs by promoting astrocytogenesis, thus hampering the potential for neural replacement. The present study investigated the role of miR-17-92 in protecting against detrimental effects of neuroinflammation on NSC differentiation in cell therapy.<br />Methods: NSCs were treated with conditioned medium from lesioned astrocytes with/without neutralizing antibodies of leukemia inhibitory factor (LIF) or/and ciliary neurotrophic factor (CNTF), respectively. Afterward, the levels of p-STAT3 and p-JAK2 were determined by western blotting while expression of glial fibrillary acidic protein (GFAP) and β-tubulin III was assessed by immunostaining. The activation of JAK-STAT pathway and cell differentiation were also evaluated after we overexpressed miR-17-92 in NSCs under different neuroinflammatory conditions. After the transplantation of miR-17-92-overexpressing NSCs into injured mouse cortex, PH3, nestin, GFAP, and NeuN were analyzed by immunostaining. In addition, motor coordination of mice was evaluated by rotarod test.<br />Results: Conditioned medium from lesioned astrocytes activated JAK-STAT pathway and facilitated astrocytic differentiation in NSCs while neutralizing antibodies of LIF and CNTF remarkably attenuated such effects. miR-17-92 cluster repressed the expression of multiple proteins including GP130, CNTFR, JAK2, and STAT3 in JAK-STAT pathway. Overexpression of miR-17-92 in NSCs systematically blocked the activation of JAK-STAT pathway mediated by LIF and CNTF, which facilitated neuronal differentiation in vitro. Furthermore, miR-17-92 increased neuronal generation of grafted NSCs and reduced astrogliosis, which resulted in the improvement of motor coordination of brain-injured mice.<br />Conclusions: Our results suggest that miR-17-92 promotes neuronal differentiation of grafted NSCs under neuroinflammatory condition via inhibition of multiple proteins in JAK-STAT pathway.
- Subjects :
- Animals
Astrocytes metabolism
Brain Injuries, Traumatic complications
Cell Differentiation genetics
Cells, Cultured
Culture Media, Conditioned pharmacology
Disease Models, Animal
Embryo, Mammalian
Encephalitis drug therapy
Encephalitis etiology
Female
Gene Expression Regulation drug effects
Gene Expression Regulation genetics
Glial Fibrillary Acidic Protein metabolism
Leukemia Inhibitory Factor immunology
Leukemia Inhibitory Factor metabolism
Mice
Mice, Inbred C57BL
MicroRNAs metabolism
MicroRNAs therapeutic use
RNA, Long Noncoding
Rotarod Performance Test
Signal Transduction drug effects
Signal Transduction genetics
Tubulin metabolism
Cell Differentiation drug effects
Encephalitis surgery
MicroRNAs pharmacology
Neural Stem Cells physiology
Neural Stem Cells transplantation
Subjects
Details
- Language :
- English
- ISSN :
- 1742-2094
- Volume :
- 13
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of neuroinflammation
- Publication Type :
- Academic Journal
- Accession number :
- 27567678
- Full Text :
- https://doi.org/10.1186/s12974-016-0685-5