Both carvedilol and cimetidine alleviate cisplatin-induced nephrotoxicity via downregulating OCT2

Huan Wu1, Yichun Ning2, Zhaoxing Sun1

  • 1Department of Nephrology, Zhongshan Hospital, Fudan University, Shanghai, China; Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai, China.

Abstract

Insights

Carvedilol and cimetidine protect against cisplatin-induced acute kidney injury (Cis-AKI) by inhibiting OCT2. These drugs reduce kidney damage without affecting cisplatin's anti-tumor efficacy.

Area of Science:

  • Nephrology
  • Pharmacology
  • Oncology

Background:

  • Cisplatin chemotherapy causes severe nephrotoxicity, limiting its use.
  • Organic cation transporter 2 (OCT2) plays a role in cisplatin uptake by the kidneys.
  • Effective pharmacological treatments for cisplatin-induced acute kidney injury (Cis-AKI) are lacking.

Purpose of the Study:

  • To identify existing drugs that can prevent Cis-AKI by inhibiting OCT2.
  • To evaluate the protective effects of candidate drugs on kidney cells and in vivo models.
  • To assess if these drugs preserve cisplatin's anti-tumor activity.

Main Methods:

  • Examined OCT2 mRNA levels in patient-derived cells and kidney organoids.
  • Screened FDA-approved drugs for OCT2 inhibition and Cis-AKI protective effects.
  • Assessed drug impact on OCT2 expression, cisplatin uptake, apoptosis, and anti-tumor activity in cellular and animal models.

Main Results:

  • Elevated OCT2 mRNA levels were observed in Cis-AKI patient cells.
  • Overexpression of OCT2 worsened cisplatin-induced kidney injury.
  • Carvedilol and cimetidine were identified as potent OCT2 inhibitors.
  • These drugs reduced cisplatin uptake and apoptosis in kidney cells without compromising anti-tumor effects.

Conclusions:

  • Carvedilol and cimetidine demonstrate protective effects against Cis-AKI via OCT2 inhibition.
  • These drugs offer a potential strategy to mitigate cisplatin nephrotoxicity.
  • The identified drugs maintain cisplatin's efficacy against cancer cells.

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