期刊
ONCOTARGET
卷 8, 期 42, 页码 72528-72543出版社
IMPACT JOURNALS LLC
DOI: 10.18632/oncotarget.19879
关键词
depression; regulatory T cell; cytokines; angiotensin II; captopril
资金
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2015R1D1A1A02062312]
- Korean Mental Health Technology R&D Project, Ministry of Health & Welfare, Republic of Korea [HM15C1094]
- NRF - Korean government, MSIP [2016M3A9E8941670]
- National Research Foundation of Korea [2016M3A9E8941670] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Major depression has various types of symptoms and disease courses with inconsistent response to monoamine-related antidepressants. Thus, monoamine theory may not be the only pathophysiologic pathway relevant to depression. Recently, it has been suggested that regulatory T cell (Treg) is associated with depression. Based on our previous study that showed decreased regulatory T cell (Treg) population following chronic high-dose captopril (CHC, 40 mg/kg/day * 21 days) administration, we examined whether CHC alone can induce depressive-like behaviors in mice even without stressful stimuli. In this study, we found that CHC induced depressive-like behaviors in tail suspension test (TST) and forced swimming test (FST) without systemic illness, while it did not induce anhedonic behavior, anxiety-like behaviors, or sociality-related behavior. The depressive-like behaviors were rescued by either CHC washout or antidepressant. CHC caused reduction in foxp3 and gata3 mRNA expression in the lymph nodes with elevation in plasma IL-1 beta and IL-6. Interestingly, CHC increased serum angiotensin II level. In the hippocampus, CHC increased TNF-alpha and IL-6 mRNA expression with microglia activation while reduced glucocorticoid receptor expression. However, CHC did not affect to hippocampal kynurenine pathway, serotonin level, hypothalamic corticotropin-releasing hormone mRNA level, or serum corticosterone level. Consequently, we propose that CHC may induce a specific form of depressive-like behaviors via Treg reduction and microglial activation.
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