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PDE9 inhibition promotes proliferation of neural stem cells via cGMP-PKG pathway following oxygen-glucose deprivation/reoxygenation injury in vitro.

Abstract：

:Cerebral ischemia is one of leading causes of death and long-term disability worldwide. Stem cell-based therapy is promising some valuable strategies for the structural and functional recovery after ischemic insult. The inhibition of phosphodiesterases (PDEs) has wide spectrum neuroprotective properties by stimulating proliferation of neural stem cells (NSCs). However, the potential role of PDE9 on NSCs proliferation after cerebral ischemia is not well investigated. The present study aimed to assess the contribution of PDE9 inhibition on the proliferation of NSCs and to determine the details of its underlying mechanisms against cerebral ischemia. The survival and proliferation of NSCs were assessed by CCK-8 assay and BrdU immunofluorescence staining, respectively. PDE9 activity and cGMP level were measured by ELISA kits. The protein expression of PKG and BDNF was detected by Western blot. Exposing NSCs of cultured primary hippocampus to oxygen-glucose deprivation/reoxygenation (OGD/R) significantly decreased the survival rate, but increased the proliferation of NSCs. Meanwhile, PDE9 activity was decreased, cGMP level was increased, PKG and BDNF protein expression was increased. PF-04447953, a PDE9 inhibitor, increased the survival rate of NSCs, moreover, PDE9 activity reduced more, and NSCs proliferation, cGMP level, PKG and BDNF protein expression were increased further, compared with OGD/R model group. These effects of PF-04447953, except for PDE9 activity and cGMP level, were reversed by treatment with KT5823, a PKG inhibitor. Taken together, the inhibition of PDE9 can promote the proliferation of NSCs following OGD/R injury, which may be, at least partly, mediated by cGMP-PKG pathway.

journal_name

Neurochem Int

journal_title

Neurochemistry international

authors

Huan X,Oumei C,Hongmei Q,Junxia Y,Xiaojiao M,Qingsong J

doi

10.1016/j.neuint.2019.104630

subject

Has Abstract

pub_date

2020-02-01 00:00:00

pages

104630

eissn

0197-0186

issn

1872-9754

pii

S0197-0186(19)30566-2

journal_volume

133

pub_type

杂志文章

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