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Effect of troxerutin on oxidative stress and expression of genes regulating mitochondrial biogenesis in doxorubicin-induced myocardial injury in rats

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Abstract

Because of limitation of doxorubicin (DOX) clinical application in chemotherapy due to its cardiotoxicity, finding new strategies to reduce DOX challenge and improve patients’ outcomes is crucial. Due to positive cardiovascular impacts of troxerutin (TXR), here we have investigated the effect of TXR on DOX-induced cardiotoxicity by evaluating the myocardial oxidative stress and expression of genes regulating mitochondrial biogenesis. Male Wistar rats (250–300 g) were randomly allocated into four groups: control, TXR, DOX, and TXR + DOX. Troxerutin (150 mg/kg) was orally administrated once a day through a gavage tube for 4 weeks before DOX challenge. The TXR-treated and time-matched control rats received intraperitoneal injection of DOX (20 mg/kg). Three days after DOX challenge, the left ventricular samples were obtained to determine the expression of genes regulating mitochondrial biogenesis via real-time PCR. Myocardial creatine kinase (CK-mB), oxidative stress markers, and mitochondrial function (generation of reactive oxygen species or ROS and ATP levels) were also evaluated using commercial kits and spectrophotometric and fluorometric methods. DOX administration significantly increased the levels of CK-mB, malondialdehyde (MDA), and mitochondrial ROS levels, while reduced the cellular ATP production and expression levels of SIRT-1, PGC-1α, and NRF-2 as well as superoxide dismutase, glutathione peroxidase, and catalase activity in comparison to control group (P < 0.05 to P < 0.01). Pretreatment of DOX-received rats with TXR significantly upregulated the expression of all biogenesis genes and antioxidant enzymes with non-significant effect on catalase activity, and significantly reduced CK-mB and MDA levels toward control values (P < 0.05 to P < 0.01). Mitochondrial ROS and ATP levels were also restored significantly by pretreatment with TXR (P < 0.05). The data suggested that preconditioning of rats with TXR had protective effect on DOX-induced cardiotoxicity through inducing antioxidative properties and restoring the mitochondrial function and the expression profiles of myocardial SIRT-1/PGC-1α/NRF-2 network.

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Acknowledgments

The authors thank the staff of the Biotechnology and Drug Applied Research Center, Tabriz University of Medical Sciences. This study was the PhD thesis of Sara Babaei Kouchaki and granted by Sciences and Research Branch, Islamic Azad University, Tehran-Iran, and Clinical Development Research Unit of Shohada Hospital, Tabriz University of Medical Sciences, Tabriz-Iran.

Author contribution statement

SB, VB, and RB conceived and designed research. SB and RB conducted experiments. NP contributed new reagents. VB, NP, and RB analyzed data. SB and RB wrote the manuscript. All authors read, edited, and approved the manuscript.

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Correspondence to Reza Badalzadeh.

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All steps of this study were performed under the control of local animal research committee according to the standard guidelines with ethical approval number of 97-61754.

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The authors declare that they have no conflict of interest.

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Babaei-Kouchaki, S., Babapour, V., Panahi, N. et al. Effect of troxerutin on oxidative stress and expression of genes regulating mitochondrial biogenesis in doxorubicin-induced myocardial injury in rats. Naunyn-Schmiedeberg's Arch Pharmacol 393, 1187–1195 (2020). https://doi.org/10.1007/s00210-020-01818-0

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  • DOI: https://doi.org/10.1007/s00210-020-01818-0

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