Taxol was known to treat numerous malignancies, especially aggressive and metastatic breast cancer, ovarian cancers, lung cancers, pancreatic cancer and many other malignancies (Klein and Lehmann, 2021). However, Taxol has induced non-specific reactive hepatitis and elevated hepatic enzymes, as well as liver tissue histopathological damage in rats (Ermolaeva et al., 2008). Additionally, it is reported to cause hypersensitivity, peripheral neuropathy, nephrotoxicity, myelotoxicity and mucositis (Zang et al., 2019).The current study revealed the impact of Taxol-induced liver tissue and hepatocellular damage was confirmed biochemically by measuring serum activities of cytosolic enzymes (AST, ALT, and LDH), which were significantly elevated. Additionally, membrane-bound enzyme activities (GGT and ALP) and serum bilirubin levels are increased, thereby revealing hepato-biliary obstructions. These findings are in line with the previous research by Costa et al. (2018) who found that Taxol induces hepatic toxicity by increasing AST, ALP, GGT and bilirubin. High liver enzyme levels are indicative of cellular leakage and hepatocyte membrane damage (Choudhary and Devi, 2014). Albumin is systematically included among the parameters used in the nutritional evaluation and has recently become more widespread (Numeroso et al., 2008). Albumin deficiency indicates various liver disorders (Carvalho and Machado, 2018). The present study revealed that Taxol-administered rats exhibited significantly decreased serum albumin levels in concordance with the study of Park et al. (2012).
Histopathological liver tissue investigation in the Taxol-intoxicated rats supported these biochemical results. The liver exhibited congested central vein, moderate necrosis, moderate inflammatory cells, and severe Kupffer cell proliferation. The present results are following the findings of Krol (1998) who observed that Taxol causes histopathological liver damage. Furthermore, Karaduman et al. (2010) indicated heightened and time-dependent liver tissue degeneration and necrosis in mice in the Taxol group.
The previous deleterious biochemical and histological alterations were associated with a marked liver LPO elevation and decreased non-enzymatic antioxidant (GSH) content and enzymatic antioxidant (SOD and GPx) enzyme activities. Such findings are consistent with those of a number of other researchers (Alexandre et al., 2007; Hadzic et al., 2010; Panis et al., 2012) who indicated that Taxol treatment results in a lower antioxidant status. Moreover, Taxol exerts cytotoxic effects by generating ROS and causing oxidative stress (Meshkini and Yazdanparast, 2012; Vera-Ramirez et al., 2012; Ilinskaya et al., 2015). Commonly anti-cancer chemotherapeutic drugs attenuate antioxidant defense system and evoke the oxidative stress and production of damaging free radicals to the liver and other organs (Ahmed et al., 2019; Mahmoud et al., 2020; Mahmoud et al., 2021; Ahmed et al., 2022a; Ahmed et al., 2022b).
AFP is a translation product of the albuminoid gene family and is characterized as an embryo-specific glycoprotein that is associated with a tumor (Beattie and Dugaiczyk, 1982; Murray and Nicholson, 2011). Failure of AFP decline is usually seen as a sign of chemoresistance or existing residual tumors, requiring further treatment and predicting an unfavorable prognosis (Dallenbach et al., 2006; de la Motte et al., 2016). Taxol administration in the current research caused mRNA overexpression of tumor marker AFP. These findings agree with those of Takeyama et al. (2007) who showed several new hepatic metastases and increased serum AFP within 5 months in a case report of a patient with multiple hepatic metastases receiving combined chemotherapy, including TS-1 and Taxol.
Immunohistochemical results of the liver section in the Taxol group showed a significantly increased caspase-3 activity. Thus, Taxol is suggested to activate apoptosis in Wistar rats. These findings agree with Gu et al. (2017) who considered Taxol to induce apoptosis and elevate Caspase-3 activity. Additionally, Lu et al. (2005) showed that Taxol causes apoptosis through caspase-3 activation in human osteogenic sarcoma cells.
The combined use of Taxol with other traditional medicines was used to improve susceptibility to Taxol while minimizing its dose (Chen et al., 2012; Lee et al., 2014). Flavonoids have been numerically shown to suppress tumor cell growth in vitro and in vivo (Turati et al., 2015). In this investigation, the oral administration of naringin and/or naringenin resulted in a reduction in serum ALT, AST, ALP, GGT, and LDH activity, along with total bilirubin levels, while increasing serum albumin levels. Improvements in biochemical parameters related to liver function were linked to improvements in liver histological architecture. Meanwhile, naringin and/or naringenin decreased liver LPO and heightened GSH content, SOD, and GPx activities after 6 weeks of treatment. These findings go hand in hand with the previous ones of Ahmed et al. (2019) who observed that naringin and naringenin amended changes caused by acetaminophen in liver enzyme (ALT, AST, ALP, GGT and LDH) activities, as well as total bilirubin level, liver LPO and antioxidant parameters and also attenuate the damage of hepatic tissues.
Additionally, El-Mihi et al. (2017) found that naringin has a protective and therapeutic effect against thioacetamide-induced liver injury and fibrogenesis. Moreover, different doses of naringin were determined protective and effective for cyclophosphamide-induced hepato-toxicity (Bülbül et al., 2018). Additionally, naringenin inhibited the elevation of ALT, AST and bilirubin in lambda-cyhalothrin-treated rats (El-Saad and Abdel- Wahab, 2020). Moreover, Malayeri et al. (2020) found that naringenin enhanced methotrexate-induced alterations in the activities of AST, ALT and ALP in the liver of rats. Moreover, Cavia-Saiz et al. (2010) mentioned that naringin and naringenin are powerful free radical collectors and inhibit LPO.
Moreover, naringin and naringenin treatment in Taxol-administered rats suppressed the expression of (AFP and caspase-3). The treatment with their mixture was effective in decreasing AFP and caspase-3. The antioxidant characteristics of naringin and naringenin, as well as their ability to scavenge free radicals, may explain their inhibitory effects on Taxol-induced apoptosis and inflammation. Previous publications backed up this assertion, which indicated that both naringin and naringenin have a strong anti-free radical and antioxidant action (Renugadevi and Prabu, 2009; Sahu et al., 2014; Alam et al. 2014). Additionally, naringin has antioxidant, anti-inflammatory and DNA-protecting properties (Gelen et al., 2018). As mentioned also, naringenin can alleviate inflammation and cell death (Jayaraman et al., 2012; Lou et al., 2012; Reedman et al., 2018; Wali et al., 2020).