GABA Receptor Antagonist Promotes Hippocampal Neurogenesis and Facilitates Cognitive Function Recovery Following Acute Cerebral Ischemia in Mice
Overview
Affiliations
Purpose And Background: Previous studies have suggested that promoting endogenous neurogenesis has great significance for the recovery of cognitive dysfunction caused by cerebral ischemia (CI). Pharmacological inhibition of GABA receptor can enhance neurogenesis in adult healthy and depressed mice. In the study, we intended to investigate the effects of GABA receptor antagonists on cognitive function and hippocampal neurogenesis in mice following CI.
Methods: Adult mice were subjected to bilateral common carotid artery occlusion (BCCAO) for 20 min to induce CI and treated with CGP52432 (antagonist of GABA receptor, CGP, 10 mg/kg intraperitoneal injection) starting 24 h after CI. The Morris water maze test was performed to test spatial learning and memory at day 28. Immunofluorescence was applied to detect neurogenesis in the DG region at day 14 and 28. In in vitro experiments, cell proliferation was detected by CCK8 and immunofluorescence, and the expression of cAMP/CREB signaling pathway-related proteins was detected by ELISA assay and Western blot.
Results: CGP significantly improved spatial learning and memory disorders caused by CI, and it enhanced the proliferation of neural stem cells (NSCs), the number of immature neurons, and the differentiation from newborn cells to neurons. In vitro experiments further confirmed that CGP dose-dependently enhanced the cell viability of NSCs, and immunofluorescence staining showed that CGP promoted the proliferation of NSCs. In addition, treatment with CGP increased the expression of cAMP, PKA, and pCREB in cultured NSCs.
Conclusion: Inhibition of GABA receptor can effectively promote hippocampal neurogenesis and improve spatial learning and memory in adult mice following CI.
Gene Expression of GABA Receptor Subunits and Association with Patient Survival in Glioma.
Badalotti R, Dalmolin M, Malafaia O, Ribas Filho J, Roesler R, Fernandes M Brain Sci. 2024; 14(3).
PMID: 38539663 PMC: 10969028. DOI: 10.3390/brainsci14030275.
Possible Effects of Acupuncture in Poststroke Aphasia.
Zhuo B, Deng S, Li B, Zhu W, Zhang M, Qin C Behav Neurol. 2023; 2023:9445381.
PMID: 37091130 PMC: 10115536. DOI: 10.1155/2023/9445381.
Yang C, Li X, Feng X, Chen Y, Feng J, Jia J Oxid Med Cell Longev. 2022; 2022:8729398.
PMID: 36035210 PMC: 9410841. DOI: 10.1155/2022/8729398.
Kalkhoran A, Alipour M, Jafarzadehgharehziaaddin M, Zangbar H, Shahabi P BMC Neurosci. 2022; 23(1):44.
PMID: 35820831 PMC: 9277791. DOI: 10.1186/s12868-022-00729-5.
Wang F, Xia Z, Sheng P, Ren Y, Liu J, Ding L Cell Death Discov. 2022; 8(1):87.
PMID: 35220404 PMC: 8882190. DOI: 10.1038/s41420-022-00888-8.