PMID- 24422972 OWN - NLM STAT- MEDLINE DCOM- 20141208 LR - 20211021 IS - 1755-5949 (Electronic) IS - 1755-5930 (Print) IS - 1755-5930 (Linking) VI - 20 IP - 5 DP - 2014 May TI - Aquaporin-4 knockout exacerbates corticosterone-induced depression by inhibiting astrocyte function and hippocampal neurogenesis. PG - 391-402 LID - 10.1111/cns.12222 [doi] AB - AIMS: The predominant expression of aquaporin-4 (AQP4) in the brain implies that this water channel may be involved in a range of brain disorders. This study was designed to investigate the role of AQP4 in the pathogenesis of depression, and related possible biological mechanism. METHODS AND RESULTS: Wild-type (AQP4(+/+) ) and AQP4 knockout (AQP4(-/-) ) mice were given daily subcutaneous injections of corticosterone (20 mg/kg) for consecutive 21 days. Forced swimming test (FST) and tail suspension test (TST) showed longer immobility times in corticosterone-treated AQP4(-/-) genotype, indicating AQP4 knockout exacerbated depressive-like behaviors in mice. Using immunohistological staining, western blot, and enzyme-linked immunosorbent assay (ELISA), we found a significant loss of astrocytes, aggravated downregulation of excitatory amino acid transporter 2 (EAAT2), synapsin-1, and glial cell line-derived neurotrophic factor (GDNF) in the hippocampus of AQP4(-/-) mice. Moreover, even less hippocampal neurogenesis was identified in corticosterone-treated AQP4(-/-) mice in vivo and hippocampus-derived adult neural stem cells (ANSCs) in vitro. CONCLUSIONS: The present findings suggest AQP4 involves the pathogenesis of depression by modulating astrocytic function and adult neurogenesis, highlighting a novel profile of AQP4 as a potential target for the treatment for depression. CI - (c) 2014 John Wiley & Sons Ltd. FAU - Kong, Hui AU - Kong H AD - Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China; Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, Nanjing, China. FAU - Zeng, Xiao-Ning AU - Zeng XN FAU - Fan, Yi AU - Fan Y FAU - Yuan, Song-Tao AU - Yuan ST FAU - Ge, Song AU - Ge S FAU - Xie, Wei-Ping AU - Xie WP FAU - Wang, Hong AU - Wang H FAU - Hu, Gang AU - Hu G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140115 PL - England TA - CNS Neurosci Ther JT - CNS neuroscience & therapeutics JID - 101473265 RN - 0 (Aqp4 protein, mouse) RN - 0 (Aquaporin 4) RN - 0 (Excitatory Amino Acid Transporter 2) RN - 0 (Gdnf protein, mouse) RN - 0 (Glial Cell Line-Derived Neurotrophic Factor) RN - 0 (Slc1a2 protein, mouse) RN - 0 (Synapsins) RN - W980KJ009P (Corticosterone) SB - IM MH - Animals MH - Aquaporin 4/genetics/*metabolism MH - Astrocytes/*physiology MH - Cell Death/physiology MH - Cells, Cultured MH - Corticosterone MH - Depressive Disorder/*physiopathology MH - Disease Models, Animal MH - Down-Regulation MH - Excitatory Amino Acid Transporter 2/metabolism MH - Glial Cell Line-Derived Neurotrophic Factor/metabolism MH - Hippocampus/*physiopathology MH - Male MH - Mice, Inbred Strains MH - Mice, Knockout MH - Neurogenesis/*physiology MH - Synapsins/metabolism PMC - PMC6493035 OTO - NOTNLM OT - Aquaporin-4 OT - Astrocyte function OT - Depression OT - Neurogenesis COIS- The authors declare no conflict of interest. EDAT- 2014/01/16 06:00 MHDA- 2014/12/15 06:00 PMCR- 2014/01/15 CRDT- 2014/01/16 06:00 PHST- 2013/11/16 00:00 [received] PHST- 2013/12/03 00:00 [revised] PHST- 2013/12/03 00:00 [accepted] PHST- 2014/01/16 06:00 [entrez] PHST- 2014/01/16 06:00 [pubmed] PHST- 2014/12/15 06:00 [medline] PHST- 2014/01/15 00:00 [pmc-release] AID - CNS12222 [pii] AID - 10.1111/cns.12222 [doi] PST - ppublish SO - CNS Neurosci Ther. 2014 May;20(5):391-402. doi: 10.1111/cns.12222. Epub 2014 Jan 15.