Ketamine contributes to the alteration of Ca2+ transient evoked by behavioral tests in the prelimbic area of mPFC: A study on chronic CORT-induced depressive mice. (14th September 2020)

• Record Type: Journal Article
• Authors: Yu, Tianyu; Li, Yuanyuan; Hu, Qi; Wang, Feifei; Yuan, Shiyang; Li, Cui; Li, Juping; Cui, Jialin; Shen, Hui
• Is Part Of: Neuroscience letters. Volume 735(2020)
• Publication Date: 2020-09-14
• Subjects: Ca2+ transients -- Depression -- Fiber photometry -- Medial prefrontal cortex -- Neuron -- Ketamine; Neurology -- Periodicals; Neurology -- Periodicals; Research -- Periodicals; Neurologie -- Périodiques; Neuroanatomie -- Périodiques; Neuropharmacologie -- Périodiques; Neurophysiologie -- Périodiques; Neurology; Periodicals; Electronic journals; 617.48
• DOI: 10.1016/j.neulet.2020.135220
• Languages: English
• ISSNs: 0304-3940

Abstract

Highlights: Chronic CORT protocol induced depressive-like behaviors. CORT reduced Ca 2+ transients during behavioral tests. Ketamine ameliorated depressive-like behaviors. Ca 2+ transients alteration was corresponded to struggling, rearing and exploring. Ketamine reversed Ca 2+ transients reductions induced by CORT. Abstract: Recent studies have showed that ketamine is a rapid and efficient antidepressant, but the mechanism of its antidepressant effect is not fully clear. It is still lack of the research investigating the relation between depressive-like behaviors and neuronal activities in specific brain area after administration of ketamine in vivo. Medial prefrontal cortex (mPFC) involved in the pathogenesis of depression. As a result of effective assessments after behavioral test, most studies lack of direct evidence of the relation between efficacy and the activity of specific brain area. Therefore, we used fiber photometry to explore the alteration of Ca 2+ transient in the prelimbic (PrL) area of mPFC during behavioral tests in freely moving mice. Our results showed that the chronic corticosterone (CORT) protocol induced depressive-like behaviors. Administration of ketamine reversed these effects. The activation of Ca 2+ transients was associated with some behaviors during behavioral tests. Struggling, rearing and exploring evoked strong Ca 2+ transients, but moving and grooming did not. The Ca 2+ transients amplitude reductions of struggling, rearing and exploring induced by CORT were reversed by ketamine. The results indicated that ketamine ameliorated depressive-like behaviors via mediating neural activation in PrL.