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Small molecule agonist of mitochondrial fusion repairs mitochondrial dysfunction

  • Yingjie Guo
  • , Huan Zhang
  • , Chen Yan
  • , Birong Shen
  • , Yue Zhang
  • , Xiangyang Guo
  • , Sha Sun
  • , Fan Yu
  • , Jiayun Yan
  • , Ronghe Liu
  • , Qianping Zhang
  • , Di Zhang
  • , Haiyang Liu
  • , Yang Liu
  • , Yaoyao Zhang
  • , Wenlei Li
  • , Jiangyu Qin
  • , He Lv
  • , Zhaoxia Wang
  • , Yun Yuan
  • Jie Feng Yang, Ya Ting Zhong, Song Gao, Bing Zhou, Lei Liu, Deling Kong, Xiaojiang Hao*, Junjie Hu*, Quan Chen*
*Corresponding author for this work
  • State Key Laboratory of Membrane Biology
  • CAS - Institute of Zoology
  • State Key Laboratory of Medicinal Chemical Biology
  • Nankai University
  • University of Chinese Academy of Sciences
  • National Laboratory of Biomacromolecules
  • State Key Laboratory of Phytochemistry and Plant Resources
  • CAS - Kunming Institute of Botany
  • Department of Physiology and Pathophysiology
  • Tianjin Medical University
  • Interdisciplinary Center of Cell Response
  • Beijing Key Laboratory of Neurovascular Disease Discovery
  • Peking University
  • State Key Laboratory of Oncology in South China
  • Sun Yat-Sen University Cancer Center

Research output: Contribution to journal › Article › peer-review

Abstract

Membrane dynamics are important to the integrity and function of mitochondria. Defective mitochondrial fusion underlies the pathogenesis of multiple diseases. The ability to target fusion highlights the potential to fight life-threatening conditions. Here we report a small molecule agonist, S89, that specifically promotes mitochondrial fusion by targeting endogenous MFN1. S89 interacts directly with a loop region in the helix bundle 2 domain of MFN1 to stimulate GTP hydrolysis and vesicle fusion. GTP loading or competition by S89 dislodges the loop from the GTPase domain and unlocks the molecule. S89 restores mitochondrial and cellular defects caused by mitochondrial DNA mutations, oxidative stress inducer paraquat, ferroptosis inducer RSL3 or CMT2A-causing mutations by boosting endogenous MFN1. Strikingly, S89 effectively eliminates ischemia/reperfusion (I/R)-induced mitochondrial damage and protects mouse heart from I/R injury. These results reveal the priming mechanism for MFNs and provide a therapeutic strategy for mitochondrial diseases when additional mitochondrial fusion is beneficial. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)468-477
Number of pages10
JournalNature Chemical Biology
Volume19
Issue number4
DOIs
StatePublished - Apr 2023

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