Naringin protects against paclitaxel‐induced toxicity in rat testicular tissues by regulating genes in pro‐inflammatory cytokines, oxidative stress, apoptosis, and JNK/MAPK signaling pathways

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Abstract
Paclitaxel (PTX), which is actively used in the treatment of many types of cancer, has a toxic effect by causing increased oxidative stress in testicular tissues. Naringin (NRG) is a natural flavonoid found in plants, and its antioxidant properties are at the forefront. This study aims to investigate the protective feature of NRG in PTX‐induced testicular toxicity.Thirty‐five male Sprague rats were divided into five groups: control, NRG, PTX, PTX + NRG50, and PTX + NRG100. Rats were administered PTX (2 mg/kg, BW) intraperitoneally once daily for the first 5 days. Then, between the 6th and 14th days, NRG (50 and 100 mg/kg) was administered orally once a day.NRG reduced PTX‐induced lipid peroxidation and increased testicular tissue antioxidant capacity (superoxide dismutase, catalase, glutathione peroxidase, and glutathione). While NRG reduces the mRNA expression levels of nuclear factor kappa B, tumor necrosis factor‐alpha, interleukin‐1 beta, cyclooxygenase‐2, interleukin‐6, inducible‐nitric oxide synthase, mitogen‐activated protein kinase 14 (MAPK)14, MAPK15, c‐Jun N‐terminal kinase, P53, Apaf1, Caspase3, Caspase6, Caspase9, and Bax in testicular tissues; it caused an increase in Nrf2, HO‐1, NQO1 and Bcl‐2 levels. NRG also improved the structural and functional integrity of testicular tissue disrupted by PTX. PTX‐induced sperm damage was alleviated by NRG.NRG showed a protective effect by alleviating the PTX‐induced testicular toxicity by increasing oxidative stress, inflammation, apoptosis, and autophagy.

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