PMID- 31443122 OWN - NLM STAT- MEDLINE DCOM- 20200911 LR - 20200911 IS - 1932-8494 (Electronic) IS - 1932-8486 (Linking) VI - 302 IP - 12 DP - 2019 Dec TI - The E3 Ubiquitin Ligase MARCH8 Regulates TNF-alpha-Induced Apoptosis in Hippocampal Neurons by Targeting Myosin Light Chain 2 for Degradation. PG - 2271-2278 LID - 10.1002/ar.24238 [doi] AB - Tumor necrosis factor-alpha (TNF-alpha) is an important inflammatory cytokine that plays a key role in neuronal damage. Elevated expression of TNF-alpha is associated with numerous neurodegenerative diseases including Alzheimer's Disease and Parkinson's Disease. However, the specific mechanism of the signaling events that trigger TNF-alpha-mediated neurotoxicity remain unknown. In this study, we report that intracerebroventricular injection of TNF-alpha in rat hippocampal neurons down-regulates MLC2 and up-regulates MARCH8, an essential light chain and regulatory myosin light chain of NM Myosin II, respectively. MARCH8 overexpression attenuates the degradation of MLC2 by promoting its ubiquitination and degradation. Inhibition of MARCH8 by siRNA blocks caspase-3 activation and apoptosis signaling, suggesting that TNF-alpha-induced apoptosis of neurons is partially dependent on the accumulation of MARCH8 and the ubiquitination of MLC2. Taken together, our data not only clarify the function of MARCH8 in TNF-alpha-induced neurotoxicity, but also demonstrates that TNF-alpha promotes the MARCH8-MLC2 mediated apoptosis of hippocampal neurons. Anat Rec, 302:2271-2278, 2019. (c) 2019 American Association for Anatomy. CI - (c) 2019 American Association for Anatomy. FAU - Guo, Shanglin AU - Guo S AD - The Affiliated Hospital of Medical College, QingDao University, Qingdao, China. FAU - Zhang, Yongqing AU - Zhang Y AD - Qilu Hospital of Shandong University (Qingdao), Qingdao, China. FAU - Wei, Chaoping AU - Wei C AD - Qingdao Women and Children's Hospital, Qingdao, China. FAU - Shi, Lu AU - Shi L AD - 401 Hospital of the People's Liberation Army, Qingdao, China. FAU - Feng, Yugong AU - Feng Y AUID- ORCID: 0000-0002-9855-5949 AD - The Affiliated Hospital of Medical College, QingDao University, Qingdao, China. LA - eng PT - Journal Article DEP - 20190930 PL - United States TA - Anat Rec (Hoboken) JT - Anatomical record (Hoboken, N.J. : 2007) JID - 101292775 RN - 0 (Myosin Light Chains) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (myosin light chain 2) RN - EC 2.3.2.27 (March8 protein, mouse) RN - EC 2.3.2.27 (Ubiquitin-Protein Ligases) RN - EC 3.6.1.- (Cardiac Myosins) SB - IM MH - Animals MH - *Apoptosis MH - Cardiac Myosins/*metabolism MH - Hippocampus/drug effects/*metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Myosin Light Chains/*metabolism MH - Neurons/drug effects/*metabolism MH - *Proteolysis MH - Rats MH - Tumor Necrosis Factor-alpha/*pharmacology MH - Ubiquitin-Protein Ligases/genetics/*metabolism MH - Ubiquitination OTO - NOTNLM OT - TNF-alpha OT - apoptosis OT - march8 EDAT- 2019/08/24 06:00 MHDA- 2020/09/12 06:00 CRDT- 2019/08/24 06:00 PHST- 2018/08/28 00:00 [received] PHST- 2019/04/28 00:00 [revised] PHST- 2019/05/20 00:00 [accepted] PHST- 2019/08/24 06:00 [pubmed] PHST- 2020/09/12 06:00 [medline] PHST- 2019/08/24 06:00 [entrez] AID - 10.1002/ar.24238 [doi] PST - ppublish SO - Anat Rec (Hoboken). 2019 Dec;302(12):2271-2278. doi: 10.1002/ar.24238. Epub 2019 Sep 30.