PMID- 29086908 OWN - NLM STAT- MEDLINE DCOM- 20180828 LR - 20190401 IS - 1995-8218 (Electronic) IS - 1673-7067 (Print) IS - 1995-8218 (Linking) VI - 34 IP - 2 DP - 2018 Apr TI - Melatonin Augments the Effects of Fluoxetine on Depression-Like Behavior and Hippocampal BDNF-TrkB Signaling. PG - 303-311 LID - 10.1007/s12264-017-0189-z [doi] AB - Depression is a debilitating psychiatric disorder with a huge socioeconomic burden, and its treatment relies on antidepressants including selective serotonin reuptake inhibitors (SSRIs). Recently, the melatonergic system that is closely associated with the serotonergic system has been implicated in the pathophysiology and treatment of depression. However, it remains unknown whether combined treatment with SSRI and melatonin has synergistic antidepressant effects. In this study, we applied a sub-chronic restraint stress paradigm, and evaluated the potential antidepressant effects of combined fluoxetine and melatonin in adult male mice. Sub-chronic restraint stress (6 h/day for 10 days) induced depression-like behavior as shown by deteriorated fur state, increased latency to groom in the splash test, and increased immobility time in the forced-swim test. Repeated administration of either fluoxetine or melatonin at 10 mg/kg during stress exposure failed to prevent depression-like phenotypes. However, combined treatment with fluoxetine and melatonin at the selected dose attenuated stress-induced behavioral abnormalities. Moreover, we found that the antidepressant effects of combined treatment were associated with the normalization of brain-derived neurotrophic factor (BDNF)-tropomyosin receptor kinase B (TrkB) signaling in the hippocampus, but not in the prefrontal cortex. Our findings suggest that combined fluoxetine and melatonin treatment exerts synergistic antidepressant effects possibly by restoring hippocampal BDNF-TrkB signaling. FAU - Li, Kun AU - Li K AD - Department of Neurobiology, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, 310058, China. FAU - Shen, Si AU - Shen S AD - Zhejiang University School of Medicine, Hangzhou, 310058, China. FAU - Ji, Yu-Tian AU - Ji YT AD - Zhejiang University School of Medicine, Hangzhou, 310058, China. FAU - Li, Xu-Yun AU - Li XY AD - Experimental Teaching Center of Basic Medicine, Zhejiang University School of Medicine, Hangzhou, 310058, China. FAU - Zhang, Li-San AU - Zhang LS AD - Department of Neurology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, China. FAU - Wang, Xiao-Dong AU - Wang XD AD - Department of Neurobiology, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, 310058, China. xiaodongwang@zju.edu.cn. LA - eng PT - Journal Article DEP - 20171031 PL - Singapore TA - Neurosci Bull JT - Neuroscience bulletin JID - 101256850 RN - 0 (Antidepressive Agents) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Membrane Glycoproteins) RN - 01K63SUP8D (Fluoxetine) RN - EC 2.7.10.1 (Ntrk2 protein, mouse) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) RN - JL5DK93RCL (Melatonin) SB - IM MH - Animals MH - Antidepressive Agents/*pharmacology MH - Behavior, Animal/*drug effects MH - Brain-Derived Neurotrophic Factor/drug effects/metabolism MH - *Depression MH - Drug Synergism MH - Drug Therapy, Combination MH - Fluoxetine/*pharmacology MH - Hippocampus/*drug effects/metabolism MH - Male MH - Melatonin/*pharmacology MH - Membrane Glycoproteins/drug effects/metabolism MH - Mice, Inbred C57BL MH - Protein-Tyrosine Kinases/drug effects/metabolism MH - Restraint, Physical MH - Signal Transduction/drug effects PMC - PMC5856716 OTO - NOTNLM OT - BDNF OT - Depression OT - Fluoxetine OT - Melatonin OT - TrkB EDAT- 2017/11/01 06:00 MHDA- 2018/08/29 06:00 PMCR- 2019/04/01 CRDT- 2017/11/01 06:00 PHST- 2017/06/01 00:00 [received] PHST- 2017/09/14 00:00 [accepted] PHST- 2017/11/01 06:00 [pubmed] PHST- 2018/08/29 06:00 [medline] PHST- 2017/11/01 06:00 [entrez] PHST- 2019/04/01 00:00 [pmc-release] AID - 10.1007/s12264-017-0189-z [pii] AID - 189 [pii] AID - 10.1007/s12264-017-0189-z [doi] PST - ppublish SO - Neurosci Bull. 2018 Apr;34(2):303-311. doi: 10.1007/s12264-017-0189-z. Epub 2017 Oct 31.