PMID- 35929607 OWN - NLM STAT- MEDLINE DCOM- 20220808 LR - 20231105 IS - 2050-084X (Electronic) IS - 2050-084X (Linking) VI - 11 DP - 2022 Aug 5 TI - Septin7 is indispensable for proper skeletal muscle architecture and function. LID - 10.7554/eLife.75863 [doi] LID - e75863 AB - Today septins are considered as the fourth component of the cytoskeleton, with the Septin7 isoform playing a critical role in the formation of higher-order structures. While its importance has already been confirmed in several intracellular processes of different organs, very little is known about its role in skeletal muscle. Here, using Septin7 conditional knockdown (KD) mouse model, the C2C12 cell line, and enzymatically isolated adult muscle fibers, the organization and localization of septin filaments are revealed, and an ontogenesis-dependent expression of Septin7 is demonstrated. KD mice displayed a characteristic hunchback phenotype with skeletal deformities, reduction in in vivo and in vitro force generation, and disorganized mitochondrial networks. Furthermore, knockout of Septin7 in C2C12 cells resulted in complete loss of cell division while KD cells provided evidence that Septin7 is essential for proper myotube differentiation. These and the transient increase in Septin7 expression following muscle injury suggest that it may be involved in muscle regeneration and development. CI - (c) 2022, Gonczi et al. FAU - Gonczi, Monika AU - Gonczi M AUID- ORCID: 0000-0002-8421-4369 AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Raduly, Zsolt AU - Raduly Z AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. AD - Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, Hungary. FAU - Szabo, Laszlo AU - Szabo L AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. AD - Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, Hungary. FAU - Fodor, Janos AU - Fodor J AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Telek, Andrea AU - Telek A AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Dobrosi, Nora AU - Dobrosi N AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Balogh, Norbert AU - Balogh N AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. AD - Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, Hungary. FAU - Szentesi, Peter AU - Szentesi P AUID- ORCID: 0000-0003-2621-2282 AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Kis, Greta AU - Kis G AD - Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Antal, Miklos AU - Antal M AUID- ORCID: 0000-0002-2457-7387 AD - Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Trencsenyi, Gyorgy AU - Trencsenyi G AD - Division of Nuclear Medicine and Translational Imaging, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Dienes, Beatrix AU - Dienes B AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. FAU - Csernoch, Laszlo AU - Csernoch L AUID- ORCID: 0000-0002-2446-1456 AD - Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20220805 PL - England TA - Elife JT - eLife JID - 101579614 RN - EC 3.6.1.- (Sept7 protein, mouse) RN - EC 3.6.1.- (Septins) SB - IM MH - Animals MH - Cell Differentiation MH - Mice MH - Mitochondria/metabolism MH - *Muscle Fibers, Skeletal/metabolism MH - *Muscle, Skeletal/metabolism MH - Septins/genetics/metabolism PMC - PMC9355566 OTO - NOTNLM OT - cell biology OT - cytoskeleton OT - development OT - human OT - mitochondria OT - mouse OT - regeneration OT - septins OT - skeletal muscle COIS- MG, ZR, LS, JF, AT, ND, NB, PS, GK, MA, GT, BD, LC No competing interests declared EDAT- 2022/08/06 06:00 MHDA- 2022/08/09 06:00 PMCR- 2022/08/05 CRDT- 2022/08/05 07:53 PHST- 2021/11/25 00:00 [received] PHST- 2022/07/03 00:00 [accepted] PHST- 2022/08/05 07:53 [entrez] PHST- 2022/08/06 06:00 [pubmed] PHST- 2022/08/09 06:00 [medline] PHST- 2022/08/05 00:00 [pmc-release] AID - 75863 [pii] AID - 10.7554/eLife.75863 [doi] PST - epublish SO - Elife. 2022 Aug 5;11:e75863. doi: 10.7554/eLife.75863.