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Related Experiment Video

Updated: Mar 9, 2026

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IMMT downregulation promotes osteoarthritis development by inducing mitochondrial dysfunction.

Lvlin Yang1, Binyang Wang2, Qing Ma2

  • 1Department of Orthopedics, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, No.301 Zhengyuan Street, Jinfeng District, Yinchuan, 750001, Ningxia, China. yanglvlin2020@163.com.

Journal of Orthopaedic Surgery and Research
|March 7, 2026
PubMed
Summary

Researchers identified seven key mitochondria-related genes that can predict osteoarthritis (OA) risk. Downregulation of IMMT, a key gene, promotes OA by causing mitochondrial dysfunction, offering new diagnostic and therapeutic targets.

Keywords:
IMMTMitochondrial dysfunctionMolecular signatureOsteoarthritis

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Area of Science:

  • Mitochondrial biology
  • Genetics
  • Osteoarthritis research

Background:

  • Osteoarthritis (OA) pathogenesis involves complex genetic and molecular mechanisms.
  • Mitochondrial dysfunction is increasingly recognized as a contributor to OA development.

Purpose of the Study:

  • To identify critical mitochondria-related genes (MRGs) implicated in osteoarthritis (OA) pathogenesis.
  • To develop a molecular signature for predicting OA risk based on differentially expressed MRGs (DE-MRGs).

Main Methods:

  • Analysis of OA gene expression datasets using differential expression analysis, WGCNA, and machine learning.
  • Construction of a predictive molecular signature and nomogram.
  • Validation of DE-MRG expression and functional impact in IL-1β-treated chondrocytes and via gene knockdown.

Main Results:

  • A seven-gene signature (IMMT, LONP1, TUFM, SOD2, CYCS, CAT, DLD) showed high predictive performance for OA.
  • The nomogram demonstrated high accuracy in predicting OA risk.
  • IMMT downregulation was confirmed in vitro and found to promote OA development and mitochondrial dysfunction.

Conclusions:

  • The identified DE-MRG signature is a promising tool for OA prediction.
  • Downregulation of IMMT contributes to OA pathogenesis via mitochondrial dysfunction.
  • Findings support the development of novel OA diagnostic and therapeutic strategies targeting mitochondrial pathways.