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Updated: May 24, 2025

Acute Kidney Injury Model Induced by Cisplatin in Adult Zebrafish
Published on: May 15, 2021
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.
Background:
Cisplatin is a common chemotherapy agent for solid tumors but severe nephrotoxicity limits its application, with no effective pharmacological treatments. Organic cation transporter 2 (OCT2) is involved in cisplatin uptake in kidneys. This study aimed to find drugs with promising clinical applications that could prevent cisplatin-induced acute kidney injury (Cis-AKI) by inhibiting OCT2.
Methods:
The mRNA level of OCT2 was examined in human induced pluripotent stem cells (iPSCs) from Cis-AKI patients and paired non-AKI patients. The association between OCT2 and Cis-AKI was investigated by HEK293FT cells and kidney organoids. We screened potential compounds exhibiting protective effects against Cis-AKI in US Food and Drug Administration-approved drugs through virtual screening and activity screening. Subsequently, we determined the effects of these compounds on OCT2 expression, cisplatin uptake, and apoptosis in cells, kidney organoids and mice. A549 and HeLa cells were adopted to observe the influence of drugs on the anti-tumor function of cisplatin.
Results:
Compared to non-AKI patients, the OCT2 mRNA levels of iPSCs from Cis-AKI patients were elevated. OCT2 exhibits similar expression patterns in kidney organoids and human kidney tissues. Furthermore, the overexpression of OCT2 in kidney organoids and HEK293FT cells exacerbated the injury caused by cisplatin. Carvedilol and cimetidine were identified as potent OCT2 inhibitors by drug screening. Further analysis revealed that the pretreatment of carvedilol or cimetidine downregulated OCT2, reduced cisplatin uptake, and alleviated cisplatin-induced apoptosis, but the combination of the two drugs didn't further improve these outcomes. Additionally, carvedilol and cimetidine didn't compromise the cisplatin-induced cell death in A549 and HeLa cells.
Conclusion:
Our study confirmed that carvedilol and cimetidine exert protective effects against Cis-AKI by inhibiting OCT2, without altering the anti-tumor effects of cisplatin.
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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