Mengjun Geng, Qiujing Shao, Jiacheng Fu, Jingyang Gu, Laipeng Feng, Liqin Zhao, Cong Liu, Junlin Mu, Xiaoli Zhang, Mingjun Zhao, Xinsheng Guo, Cai Song, Yan Li, Huiying Wang, Changhong Wang
Chronic stress is the primary environmental risk factor for major depressive disorder (MDD), and there is compelling evidence that neuroinflammation is the major pathomechanism linking chronic stress to MDD. Mitogen-activated protein kinase (MAPK) phosphatase-1 (MKP-1) is a negative regulator of MAPK signaling pathways involved in cellular stress responses, survival, and neuroinflammation. We examined the possible contributions of MKP-1 to stress-induced MDD by comparing depression-like behaviors (anhedonia, motor retardation, behavioral despair), neuroinflammatory marker expression, and MAPK signaling pathways among rats exposed to chronic unpredictable mild stress (CUMS), overexpressing MKP-1 in the hippocampus, and CUMS-exposed rats underexpressing MKP-1 in the hippocampus...
March 1, 2024: Translational Psychiatry