Journal
CELLULAR AND MOLECULAR NEUROBIOLOGY
Volume 37, Issue 5, Pages 817-829Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10571-016-0420-x
Keywords
Alpha-synuclein; Primary spinal neurons; Spinal cord transection; Apoptotic gene; Ciliary neurotrophic factor
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Funding
- National Natural Science Foundation of China (CN) [81560215, 81171176]
- Ph.D. Programs Foundation of Ministry of Education of China [20125317120001]
- Yunnan Provincial Natural Science Foundation of China [2011FZ112, 2013FZ134]
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Spinal cord injury (SCI) often causes neurological deficits with poor recovery; the treatment, however, is far from satisfaction, and the mechanisms remain unclear. Using immunohistochemistry and western blotting analysis, we found alpha-synuclein (SNCA) was significantly up-regulated in the spinal caudal segment of rats subjected to spinal cord transection at 3 days post-operation. Moreover, the role of SNCA on neuronal growth and apoptosis in vitro was determined by using overexpressing and interfering SNCA recombined plasmid vectors, and the underlying mechanism was detected by QRT-PCR and western blotting. Spinal neurons transfected with SNCA-shRNA lentivirus gave rise to an optimal neuronal survival, while it results in cell apoptosis in SNCA-ORF group. In molecular level, SNCA silence induced the up-regulation of CNTF and down-regulation of Caspase7/9. Together, endogenous SNCA plays a crucial role in spinal neuronal survival, in which the underlying mechanism may be linked to the regulation both apoptotic genes (Caspase7/9) and CNTF. The present findings therefore provide novel insights into the role of SNCA in spinal cord and associated mechanism, which may provide novel cue for the treatment of SCI in future clinic trials.
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