PMID- 34533019 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20211026 IS - 2037-7452 (Print) IS - 2037-7460 (Electronic) IS - 2037-7452 (Linking) VI - 31 IP - 3 DP - 2021 Sep 17 TI - A revised model for mitochondrial dysfunction in Duchenne muscular dystrophy. LID - 10.4081/ejtm.2021.10012 [doi] LID - 10012 AB - We recently identified a signaling pathway that links the upregulation of miR-379 with a mitochondrial response in dystrophic muscle. In the present commentary, we explain the significance that this pathway may have in mitochondrial dysfunction in Duchenne muscular dystrophy (DMD). We identified the upregulation of miR-379 in the serum and muscles of DMD animal models and patients. We found that miR-379 is one of very few miRNAs whose expression was normalized in DMD patients treated with glucocorticoid. We identified EIF4G2 as a miR-379 target, which may promote mitochondrial oxidative phosphorylation (OxPhos) in the skeletal muscle. We found enriched EIF4G2 expression in oxidative fibers, and identified the mitochondrial ATP synthase subunit DAPIT as a translational target of EIF4G2. The identified signaling cascade, which comprises miR-379, EIF4G2 and DAPIT, may link the glucocorticoid treatment in DMD to a recovered mitochondrial ATP synthesis rate. We propose an updated model of mitochondrial dysfunction in DMD. FAU - Vu Hong, Ai AU - Vu Hong A AD - Genethon, Evry, France; Universite Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare research unit UMR-S951, Evry. avuhong@genethon.fr. FAU - Sanson, Mathilde AU - Sanson M AD - Genethon, Evry, France; Universite Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare research unit UMR-S951, Evry. mathildesanson199@gmail.com. FAU - Richard, Isabelle AU - Richard I AD - Genethon, Evry, France; Universite Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare research unit UMR-S951, Evry. richard@genethon.fr. FAU - Israeli, David AU - Israeli D AD - Genethon, Evry, France; Universite Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare research unit UMR-S951, Evry. israeli@genethon.fr. LA - eng PT - Journal Article DEP - 20210917 PL - Italy TA - Eur J Transl Myol JT - European journal of translational myology JID - 101576208 PMC - PMC8495359 COIS- We confirm that we have read the Journal's position on issues involved in ethical publication and affirm that this report is consistent with those guidelines. EDAT- 2021/09/18 06:00 MHDA- 2021/09/18 06:01 PMCR- 2021/09/27 CRDT- 2021/09/17 07:53 PHST- 2021/08/03 00:00 [received] PHST- 2021/09/12 00:00 [accepted] PHST- 2021/09/18 06:00 [pubmed] PHST- 2021/09/18 06:01 [medline] PHST- 2021/09/17 07:53 [entrez] PHST- 2021/09/27 00:00 [pmc-release] AID - 10.4081/ejtm.2021.10012 [doi] PST - epublish SO - Eur J Transl Myol. 2021 Sep 17;31(3):10012. doi: 10.4081/ejtm.2021.10012.