Estrogen- related receptors regulate innate and adaptive muscle mitochondrial energetics through cooperative and distinct actions

• 成果类型: Article
• 署名作者: Fan, Weiwei; Oh, Tae Gyu; Wang, Hui J.; Crossley, Lillian; He, Mingxiao; Robbins, Hunter; Koopari, Chandra; Dai, Yang; Truitt, Morgan L.; Liddle, Christopher; Yu, Ruth T.; Atkins, Annette R.; Downes, Michael; Evans, Ronald M.
• 署名单位: Salk Institute; University of Oklahoma System; University of Oklahoma Health Sciences Center; University of Sydney; Westmead Institute for Medical Research; University of Sydney
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-12221
• DOI: 10.1073/pnas.2426179122
• 发表日期: 2025-05-20
• 关键词: err-gamma; nuclear receptors; metabolism; exercise; FAMILY; alpha

摘要

Mitochondrial energy metabolism is vital for muscle function and is tightly controlled at the transcriptional level, both in the basal state and during adaptive muscle remodeling. The importance of the transcription factors estrogen-related receptors (ERRs) in controlling innate mitochondrial energetics has been recently demonstrated. However, whether different ERR isoforms display distinct functions in glycolytic versus oxidative myofibers is largely unknown. Moreover, their roles in regulating exercise-induced adaptive mitochondrial biogenesis remain unclear. Using muscle-specific single and combinatorial knockout mouse models, we have identified both cooperative and distinct roles of the ERR isoforms ERR alpha and ERR gamma in regulating mitochondrial energy metabolism in different muscles. We demonstrate the essential roles of both these ERRs in mediating adaptive mitochondrial biogenesis in response to exercise training. We further show that PGC1 alpha- induced mitochondrial biogenesis is completely abolished in primary myotubes with ERR alpha deletion but not ERR gamma, highlighting distinct roles of these two isoforms in adaptive mitochondrial remodeling. Mechanistically, we find that both ERRs directly bind to the majority of mitochondrial energetic genes and control their expression, largely through collaborative binding to the same genomic loci. Collectively, our findings reveal critical and direct regulatory roles of ERR alpha and ERR gamma in governing both innate and adaptive mitochondrial energetics in skeletal muscle.