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Evaluating the Protective Effects of L-Arginine Against Cisplatin-Induced Cytotoxicity, Genotoxicity, and Oxidative Stress in Normal Kidney Cells and Human Blood Lymphocytes



Rahmati M1 ; Jourablou S1 ; Gharehkhani E1 ; Arab H2 ; Shokrzadeh M3, 4
Authors
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Authors Affiliations
  1. 1. Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
  2. 2. School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Toxicology and Pharmacology, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
  4. 4. Pharmaceutical Sciences Research Center, Hemoglobinopathy Institute, Mazandaran University of Medical Sciences, Sari, Iran

Source: Journal of Mazandaran University of Medical Sciences Published:2024

Abstract

Background and purpose: L-arginine is an essential amino acid used for glutathione synthesis and as a precursor to nitric oxide, it can act as a free radical scavenger and inhibitor of lipid peroxidation. Therefore, this study aimed to investigate the protective effect of L-Arginine on cisplatin-induced cytotoxicity, genotoxicity, and oxidative stress in normal kidney cells and human blood lymphocytes. Materials and methods: In this experimental study, normal kidney cells (Vero cell line) and human blood lymphocytes were used. Vero cells were pre-treated with various concentrations of L-Arginine (9.35, 18.75, 37.5, 75, 150, and 300 µg/mL) and a damaging dose of cisplatin (1.7 µg/mL). Cell viability and IC50 (inhibitory concentration) were evaluated using the MTT assay. For genotoxicity assessment, 5 mL of venous blood sample was collected from a healthy, non-smoking, non-alcoholic volunteer using a heparin syringe and after isolating lymphocytes, different concentrations of L-Arginine were pre-treated with cisplatin at an optimal genotoxic dose. To evaluate micronucleus formation in cytokinesis-blocked binucleated lymphocytes, the slide was prepared and was evaluated by light microscopy. Oxidative stress tests, including ROS and MDA levels, were conducted. ROS levels were measured using a fluorimeter device and DA-DCFH reagent. To measure the amount of malondialdehyde (MDA) produced during the lipid peroxidation process Thiobarbituric acid (TBA) was used as a reagent. Data analysis was performed using one-way ANOVA with GraphPad Prism.8 software. Results: Cisplatin exhibited dose-dependent cytotoxicity at concentrations (0.39, 0.78, 1.56, 3.12, 6.25, 12.5, 25, and 50 μg/ml) after 48 hours incubation, with an IC50 of 1.7 μg/mL. Based on the results of this study, Pre-treatment with L-arginine at concentrations of 18.75, 37.5, 75, 150, and 300 μg/ml with 1.7 μg/ml cisplatin significantly reduced cytotoxic effects, so that with the increase of L-arginine concentration, increasing the viability of normal lung cells compared to cisplatin alone as a positive control group. On the other hand, micronucleus test results showed that L-arginine significantly inhibited the genotoxicity of cisplatin in human blood lymphocytes. So in the concentration of 18.75 µg/mL, there was a significant difference with the positive control group (P<0.05), and in concentrations 37.5 to 300 µg/ml this significant difference was evident (P<0.001). Also, L-arginine in different concentrations, reduced oxidative stress caused by cisplatin by decreasing reactive oxygen species (ROS) and malondialdehyde (MDA) production. Statistically, L-arginine had a significant difference with the positive control group in all concentrations (P<0.001). Conclusion: The study demonstrated that L-Arginine, as an antioxidant compound, moderated cisplatin-induced cytotoxicity, genotoxicity, and oxidative stress in normal kidney (Vero) cells and human blood lymphocytes, showing significant protective effects. Therefore, it can be hoped for potential use as a preventive agent. © 2024, Mazandaran University of Medical Sciences. All rights reserved.
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