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Updated: Jan 31, 2026

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Comparative analysis of senolytic drugs reveals mitochondrial determinants of efficacy and resistance

Masahiro Wakita1, Koyu Ito1,2, Kaho Fujii1

  • 1Research Institute for Microbial Diseases (RIMD), The University of Osaka, Suita, Japan.

Nature Aging
|January 29, 2026
PubMed

Insights

Senolytic drugs target senescent cells to combat aging and disease. Combining potent senolytics like ABT263 with strategies that induce mitochondrial stress enhances their efficacy and reduces tumor growth.

Area of Science:

  • Cellular and Molecular Biology
  • Aging Research
  • Oncology

Background:

  • Cellular senescence is implicated in aging and various diseases.
  • Senolytic drugs offer therapeutic potential by eliminating senescent cells.
  • The comparative efficacy and resistance mechanisms of senolytic agents require further investigation.

Purpose of the Study:

  • To systematically compare the efficacy of 21 senolytic agents.
  • To identify mechanisms of resistance to senolytic drugs.
  • To explore strategies for enhancing senolytic therapy effectiveness.

Main Methods:

  • Comparative analysis of 21 senolytic agents using a senolytic specificity index.
  • Investigation of senescent cell viability and mitochondrial integrity.
  • In vitro and in vivo studies assessing the impact of mitochondrial stress on senolysis.
  • Evaluation of ketogenic diet and SGLT2 inhibition in combination with senolytics.

Main Results:

  • ABT263 (Bcl-2 inhibitor) and ARV825 (BET inhibitor) were identified as the most effective senolytics.
  • Senolytic resistance is mediated by V-ATPase-dependent clearance of damaged mitochondria, maintaining mitochondrial integrity.
  • Inducing mitochondrial stress through metabolic workload, ketogenic diet, or SGLT2 inhibition potentiated ABT263 and ARV825 efficacy.
  • Combination therapy reduced metastasis and tumor growth in mouse models.

Conclusions:

  • Mitochondrial quality control is a critical factor in resistance to senolysis.
  • Targeting mitochondrial stress can overcome resistance to potent senolytic drugs like ABT263 and ARV825.
  • This provides a framework for developing combination senotherapies to enhance treatment outcomes in aging and cancer.

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