PMID- 28881496 OWN - NLM STAT- MEDLINE DCOM- 20171124 LR - 20180320 IS - 1742-4658 (Electronic) IS - 1742-464X (Linking) VI - 284 IP - 21 DP - 2017 Nov TI - Xk-related protein 8 regulates myoblast differentiation and survival. PG - 3575-3588 LID - 10.1111/febs.14261 [doi] AB - Xk-related protein 8 (Xkr8) is a scramblase and responsible for phosphatidylserine (PS) exposure on the cell surface in a caspase-dependent manner. Although PS exposure is found to be important for myotube formation during myoblast differentiation, the role of Xkr8 during myogenesis has not been elucidated. Here we show that Xkr8 contributes to myoblast differentiation. Xkr8 overexpression induced the formation of large myotubes during early differentiation, but this phenotype was not related to caspase-dependent cleavage of Xkr8. Furthermore, forced Xkr8 expression accelerated myoblast differentiation and conferred cell-death resistance after the induction of differentiation. Consistent with these results, Xkr8-knocked-down myoblasts exhibited impaired differentiation and more apoptotic cells during differentiation, implying the involvements of Xkr8 in the survival and proliferation of myoblasts. Taken together, the study shows Xkr8 influences myogenesis by acting as a positive regulator of terminal differentiation and myoblast survival. CI - (c) 2017 Federation of European Biochemical Societies. FAU - Kim, Go-Woon AU - Kim GW AD - Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Korea. FAU - Nam, Gi-Hoon AU - Nam GH AD - Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Korea. AD - KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Korea. FAU - Kim, In-San AU - Kim IS AD - Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Korea. AD - KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Korea. FAU - Park, Seung-Yoon AU - Park SY AD - Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Korea. AD - Department of Biochemistry, School of Medicine, Dongguk University, Gyeongju, Korea. LA - eng PT - Editorial PT - Research Support, Non-U.S. Gov't DEP - 20170928 PL - England TA - FEBS J JT - The FEBS journal JID - 101229646 RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (Membrane Proteins) RN - 0 (RNA, Messenger) RN - 0 (Xkr8 protein, human) RN - 0 (Xkr8 protein, mouse) SB - IM CIN - FEBS J. 2017 Nov;284(21):3573-3574. PMID: 29120098 MH - Animals MH - Apoptosis Regulatory Proteins/genetics/*metabolism MH - Cell Differentiation MH - Cell Survival MH - Humans MH - Membrane Proteins/genetics/*metabolism MH - Mice MH - Myoblasts/*cytology/*metabolism MH - RNA, Messenger/genetics/metabolism OTO - NOTNLM OT - Xk-related protein 8 OT - apoptosis OT - differentiation OT - myoblasts OT - scramblase EDAT- 2017/09/08 06:00 MHDA- 2017/11/29 06:00 CRDT- 2017/09/08 06:00 PHST- 2017/04/03 00:00 [received] PHST- 2017/07/26 00:00 [revised] PHST- 2017/09/05 00:00 [accepted] PHST- 2017/09/08 06:00 [pubmed] PHST- 2017/11/29 06:00 [medline] PHST- 2017/09/08 06:00 [entrez] AID - 10.1111/febs.14261 [doi] PST - ppublish SO - FEBS J. 2017 Nov;284(21):3575-3588. doi: 10.1111/febs.14261. Epub 2017 Sep 28.