Abstract:
:Cocaine-regulated and amphetamine-regulated transcript (CART) is a neuropeptide with reported neuroprotective effects in ischemic cerebral injury. However, its mechanism has not yet been elucidated. Herein, we investigated the role and mechanism of CART in synaptic plasticity in neurons after ischemic cerebral stroke. We found that the survival rate of the oxygen-glucose deprivation (OGD) neurons was increased after CART treatment. Moreover, CART treatment significantly attenuated ischemia-induced neuronal synaptic damage and increased synaptophysin expression. In addition, the number of presynaptic vesicles was increased and the postsynaptic density (PSD) was thickened after CART treatment. Mechanistically, CART treatment enhanced the expression of Arc mRNA in a cAMP response element binding protein (CREB) dependent manner in OGD neurons, and blockade of CREB by KG-501 eliminated the protective effect of CART. Collectively, CART protected the synaptic structure in neurons after ischemic cerebral injury by increasing the Arc expression via upregulating p-CREB.
journal_name
Neuropeptidesjournal_title
Neuropeptidesauthors
Zhang Z,Cao X,Bao X,Zhang Y,Xu Y,Sha Ddoi
10.1016/j.npep.2020.102023subject
Has Abstractpub_date
2020-06-01 00:00:00pages
102023eissn
0143-4179issn
1532-2785pii
S0143-4179(19)30160-Xjournal_volume
81pub_type
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