PMID- 35081731 OWN - NLM STAT- MEDLINE DCOM- 20220804 LR - 20220812 IS - 1557-7716 (Electronic) IS - 1523-0864 (Linking) VI - 37 IP - 4-6 DP - 2022 Aug TI - Redox Signaling and Stress in Inherited Myopathies. PG - 301-323 LID - 10.1089/ars.2021.0266 [doi] AB - Significance: Reactive oxygen species (ROS) are highly reactive compounds that behave like a double-edged sword; they damage cellular structures and act as second messengers in signal transduction. Mitochondria and endoplasmic reticulum (ER) are interconnected organelles with a central role in ROS production, detoxification, and oxidative stress response. Skeletal muscle is the most abundant tissue in mammals and one of the most metabolically active ones and thus relies mainly on oxidative phosphorylation (OxPhos) to synthesize adenosine triphosphate. The impairment of OxPhos leads to myopathy and increased ROS production, thus affecting both redox poise and signaling. In addition, ROS enter the ER and trigger ER stress and its maladaptive response, which also lead to a myopathic phenotype with mitochondrial involvement. Here, we review the role of ROS signaling in myopathies due to either mitochondrial or ER dysfunction. Recent Advances: Relevant advances have been evolving over the last 10 years on the intricate ROS-dependent pathways that act as modifiers of the disease course in several myopathies. To this end, pathways related to mitochondrial biogenesis, satellite cell differentiation, and ER stress have been studied extensively in myopathies. Critical Issues: The analysis of the chemistry and the exact quantitation, as well as the localization of ROS, are still challenging due to the intrinsic labile nature of ROS and the technical limitations of their sensors. Future Directions: The mechanistic studies of the pathogenesis of mitochondrial and ER-related myopathies offer a unique possibility to discover novel ROS-dependent pathways. Antioxid. Redox Signal. 37, 301-323. FAU - Dogan, Sukru Anil AU - Dogan SA AUID- ORCID: 0000-0002-1800-2923 AD - Department of Molecular Biology and Genetics, Center for Life Sciences and Technologies, Bogazici University, Istanbul, Turkey. FAU - Giacchin, Giacomo AU - Giacchin G AD - Department of Biomedical Sciences, University of Padova, Padova, Italy. FAU - Zito, Ester AU - Zito E AD - Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy. AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy. FAU - Viscomi, Carlo AU - Viscomi C AUID- ORCID: 0000-0001-6050-0566 AD - Department of Biomedical Sciences, University of Padova, Padova, Italy. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20220418 PL - United States TA - Antioxid Redox Signal JT - Antioxidants & redox signaling JID - 100888899 RN - 0 (Reactive Oxygen Species) SB - IM MH - Animals MH - Endoplasmic Reticulum/metabolism MH - *Endoplasmic Reticulum Stress MH - Mammals/metabolism MH - *Muscular Diseases/genetics/metabolism MH - Oxidation-Reduction MH - Oxidative Stress MH - Reactive Oxygen Species/metabolism MH - Signal Transduction OTO - NOTNLM OT - ER-related myopathies OT - mitochondrial myopathies OT - mitochondrial-ER contact sites OT - neuromuscular diseases OT - reactive oxygen species OT - satellite cells OT - unfolded protein response EDAT- 2022/01/28 06:00 MHDA- 2022/08/05 06:00 CRDT- 2022/01/27 05:35 PHST- 2022/01/28 06:00 [pubmed] PHST- 2022/08/05 06:00 [medline] PHST- 2022/01/27 05:35 [entrez] AID - 10.1089/ars.2021.0266 [doi] PST - ppublish SO - Antioxid Redox Signal. 2022 Aug;37(4-6):301-323. doi: 10.1089/ars.2021.0266. Epub 2022 Apr 18.