PMID- 30283292 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1662-4548 (Print) IS - 1662-453X (Electronic) IS - 1662-453X (Linking) VI - 12 DP - 2018 TI - Melatonin Protects Against Neuronal Apoptosis via Suppression of the ATF6/CHOP Pathway in a Rat Model of Intracerebral Hemorrhage. PG - 638 LID - 10.3389/fnins.2018.00638 [doi] LID - 638 AB - Neuronal apoptosis is an important factor accounting for the poor outcomes of intracerebral hemorrhage (ICH). This study first showed that inhibition of activating transcription factor 6 (ATF6) could alleviate secondary brain injury through anti-apoptosis after ICH in rats. Melatonin, ATF6 and CCAAT/enhancer-binding protein homologous protein (CHOP) siRNAs were applied in this study. Brain edema, neurological functions, blood-brain barrier (BBB) integrity were evaluated at 24 h after ICH. Western blot analysis was used to evaluate the protein level of target proteins (ATF6, CHOP, Bip, Bcl-2, Bax, and cleaved caspase-3). Reverse transcription-polymerase chain reaction (RT-PCR) was used to assess the mRNA level of ATF6, CHOP and cleaved caspase-3. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) and caspase-3 immunofluorescence staining were applied to evaluate the neuronal cell death. The results suggested that the levels of ATF6 and its downstream protein, CHOP, were upregulated and reached the peak at 24 h after ICH. ATF6 was highly expressed in neurons. The administration of melatonin significantly decreased the mRNA and protein levels of ATF6, and its downstream targets, CHOP and cleaved caspase-3, but increased the Bcl-2/Bax ratio, which ameliorated the neurological functions. The CHOP siRNA significantly reversed the pro-apoptotic effect induced by the increased ATF6 level after ICH. Melatonin could protect against neuronal apoptosis via suppression of ATF6/CHOP arm of ER-stress-response pathway. FAU - Xu, Weilin AU - Xu W AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. FAU - Lu, Xiaoyang AU - Lu X AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. FAU - Zheng, Jingwei AU - Zheng J AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. FAU - Li, Tao AU - Li T AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. FAU - Gao, Liansheng AU - Gao L AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. FAU - Lenahan, Cameron AU - Lenahan C AD - Burrell College of Osteopathic Medicine, New Mexico State University, Las Cruces, NM, United States. FAU - Shao, Anwen AU - Shao A AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. FAU - Zhang, Jianmin AU - Zhang J AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. AD - Brain Research Institute, Zhejiang University, Hangzhou, China. AD - Collaborative Innovation Center for Brain Science, Zhejiang University, Hangzhou, China. FAU - Yu, Jun AU - Yu J AD - Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. LA - eng PT - Journal Article DEP - 20180919 PL - Switzerland TA - Front Neurosci JT - Frontiers in neuroscience JID - 101478481 PMC - PMC6156428 OTO - NOTNLM OT - CCAAT/enhancer-binding protein homologous protein (CHOP) OT - apoptosis OT - intracerebral hemorrhage OT - mesencephalic astrocyte-derived neurotrophic factor (ATF6) OT - secondary brain injury EDAT- 2018/10/05 06:00 MHDA- 2018/10/05 06:01 PMCR- 2018/01/01 CRDT- 2018/10/05 06:00 PHST- 2018/05/14 00:00 [received] PHST- 2018/08/27 00:00 [accepted] PHST- 2018/10/05 06:00 [entrez] PHST- 2018/10/05 06:00 [pubmed] PHST- 2018/10/05 06:01 [medline] PHST- 2018/01/01 00:00 [pmc-release] AID - 10.3389/fnins.2018.00638 [doi] PST - epublish SO - Front Neurosci. 2018 Sep 19;12:638. doi: 10.3389/fnins.2018.00638. eCollection 2018.