Resveratrol-mediated neurorestoration after cerebral ischemic injury - Sonic Hedgehog signaling pathway

• Published in: Life sciences (1973) Vol. 280; p. 119715
• Main Authors: Yu, Pingping, Wang, Li, Tang, Fanren, Guo, Shuang, Liao, Hongyan, Fan, Cengceng, Yang, Qin
• Format: Journal Article
• Language: English
• Published: New York Elsevier Inc 01.09.2021; Elsevier BV
• Subjects: Apoptosis; Axonogenesis; Biomarkers; Brain injury; Cell proliferation; Cerebral blood flow; Deprivation; Doublecortin protein; Glial fibrillary acidic protein; Glial stem cells; Glucose; Hedgehog protein; Immunohistochemistry; Injuries; Ischemia; Kinases; Microglia; Nestin; Neural stem cells; Neurogenesis; Neurons; Neurorestoration; Occlusion; Oxygen; Polymerase chain reaction; Precursors; Pretreatment; Proteins; Reperfusion; Resveratrol; Signal transduction; Signaling; Sonic Hedgehog signaling; Stem cells; Stroke; Synaptogenesis; Stroke; Neurorestoration; Sonic Hedgehog signaling; Neurogenesis; Resveratrol
• ISSN: 0024-3205; 1879-0631
• DOI: 10.1016/j.lfs.2021.119715

Resveratrol pretreatment can decrease ischemic cerebral injury and enhance proliferation of neural stem cells via mediation of Sonic Hedgehog signaling. However, it is relatively little known about whether neurorestorative effects of resveratrol are mediated by Shh signaling in ischemic cerebral injury. The present study tests whether the Shh signaling pathway mediates resveratrol to promote neurorestoration of ischemic cerebral injury. Rats or neurons before middle cerebral artery occlusion/reperfusion (MCAO/R) or oxygen-glucose deprivation/reoxygenation (OGD/R) injury were pretreated with resveratrol. Immunohistochemistry is used to be determined BrdU+/DCX+, BrdU+/Nestin+ and BrdU+/NG2+ cell (markers of new proliferated neural stem/progenitor and oligodendrocyte precursor cell, respectively), BrdU+/MAP2+ and BrdU+/CNPase+ cell (markers of new mature neuron and oligodendrocyte, respectively), BrdU+/TUNEL+ cell (marker of apoptosis for new proliferated cell), SY, NF200, Iba-1 and GFAP (markers of synaptogenesis, axon, microglia and astrocyte, respectively). Shh and Gli-1 mRNAs were detected by RT-PCR assay. Iba-1, GFAP, Shh and Gli-1 proteins were detected by Western blot. Resveratrol pretreatment significantly reduced neurological deficit scores, promoted proliferation, differentiation, migration and survival of neural stem/progenitor and oligodendrocyte precursor cells, inhibited astrocyte and microglia activation, strengthened synaptophysin and NF200 expression, at the same time, promoted neurite outgrowth of neurons. Meanwhile, expression levels of Shh and Gli-1 proteins were significantly increased and Gli-1 translocated into the nucleus. However, cyclopamine, a Smo inhibitor, canceled the above effects of resveratrol. It may be mediated, at least partly, by the Shh signaling pathway that resveratrol pretreament promote neurorestoration of ischemic cerebral injury.