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  • Küçük Resim
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    Eucalyptol Protects against Cisplatin-Induced Liver Injury in Rats
    (Pleiades Publishing Inc, 2023) Akcakavak, Gokhan; Kazak, Filiz; Deveci, Mehmet Zeki Yilmaz
    Eucalyptol (1,8-cineole), a terpenoid oxide, is known as the main component of eucalyptus essential oils. The antimicrobial, anti-inflammatory and antioxidant activities of eucalyptol have been reported in many studies. We investigated the possible effects of eucalyptol (EUC) against hepatotoxicity induced by cisplatin (CIS) in Wistar albino rats. A total of 24 rats were divided into 4 equal groups; Control (C), Eucalyptol (EUC), Cisplatin (CIS), and Cisplatin + Eucalyptol (CIS + EUC). CIS and CIS + EUC groups received cisplatin (12 mg/kg, in a single dose, intraperitoneally (i.p.)). EUC and CIS + EUC groups were treated with eucalyptol (100 mg/kg, seven days, orally). The rats were euthanised under appropriate conditions, and samples were taken. Histopathologically, hepatocyte degeneration and necrosis, sinusoidal dilatation, inflammatory cell infiltration and bile duct proliferation were significantly irregular in the CIS group compared to the C group. However, EUC treatment modulated changes in group CIS. Biochemically, EUC (100 mg/kg) treatment reduced oxidative stress against increased liver hepatotoxicity by decreasing MDA levels and increasing Glutathione (GSH), Glucose-6-phosphate dehydrogenase (G6PD) and Catalase (CAT) levels. EUC treatment down-regulated 8-hydroxy-2-deoxyguanosine (8-OHdG) levels, resulting in reductions DNA damage. It also significantly down-regulated inducible nitric oxide synthase (iNOS) expression. In conclusion, eucalyptol exerts protective effects on cisplatin-induced experimental liver toxicity in rats by improving oxidative stress and oxidative DNA damage and iNOS expressions.
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    Eucalyptol regulates Nrf2 and NF-kB signaling and alleviates gentamicin-induced kidney injury in rats by downregulating oxidative stress, oxidative DNA damage, inflammation, and apoptosis
    (Taylor & Francis Ltd, 2024) Akcakavak, Gokhan; Kazak, Filiz; Karatas, Ozhan; Alakus, Halil; Alakus, Ibrahim; Kirgiz, Omer; Celik, Zeynep
    Gentamicin, an aminoglycoside antibiotic, is nowadays widely used in the treatment of gram-negative microorganisms. The antimicrobial, anti-inflammatory, and antioxidant activities of eucalyptol, a type of saturated monoterpene, have been reported in many studies. The aim of this study was to examine the possible effects of eucalyptol on gentamicin-induced renal toxicity. A total of 32 rats were divided into 4 groups; Control (C), Eucalyptol (EUC), Gentamicin (GEN), and Gentamicin + Eucalyptol (GEN + EUC). In order to induce renal toxicity, 100 mg/kg gentamicin was administered intraperitoneally (i.p.) for 10 consecutive days in the GEN and GEN + EUC groups. EUC and GEN + EUC groups were given 100 mg/kg orally of eucalyptol for 10 consecutive days. Afterwards, rats were euthanized and samples were taken and subjected to histopathological, biochemical, immunohistochemical, and real-time PCR examinations. The blood urea nitrogen (BUN) and creatinine (CRE) levels were significantly decreased in the GEN + EUC group (0.76 and 0.69-fold, respectively) compared to the GEN group. The glutathione peroxidase (GPx) and catalase (CAT) activities were significantly increased in the GEN + EUC group (1.35 and 2.67-fold, respectively) compared to the GEN group. In GEN group, Nuclear factor kappa B (NF-kB), Interleukin 1-beta (IL-1 beta), Inducible nitric oxide synthase (iNOS), Tumor necrosis factor-alpha (TNF-alpha), Caspase-3, 8-Hydroxy-2 '-deoxyguanosine (8-OHdG) and Nuclear factor erythroid 2-related factor (Nrf2) expression levels were found to be quite irregular. GEN + EUC group decreased the expressions of NF-kB, IL-1 beta, iNOS, TNF-alpha, Caspase-3, and 8-OHdG (0.55, 0.67, 0.54, 0.54, 0.63 and 0.67 fold, respectively), while it caused increased expression of Nrf2 (3.1 fold). In addition, eucalyptol treatment ameliorated the histopathological changes that occurred with gentamicin. The results of our study show that eucalyptol has anti-inflammatory, antioxidative, antiapoptotic, nephroprotective, and curative effects on gentamicin-induced nephrotoxicity.
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    Öğe
    Proanthocyanidin alleviates testicular torsion/detorsion-induced ischemia/ reperfusion injury in rats
    (Churchill Livingstone, 2024) Kazak, Filiz; Akcakavak, Gokhan; Alakus, Ibrahim; Alakus, Halil; Kirgiz, Omer; Karatas, Ozhan; Deveci, Mehmet Zeki Yilmaz
    Testicular torsion is an urological emergency and can lead to ischemia damage and testicular loss if not diagnosed in time. Proanthocyanidin is reported to have anti-inflammatory and antioxidant properties. The current study aimed to examine the possible effects of proanthocyanidin (P) on the testis in torsion/detorsion (T/D)induced testicular ischemia/reperfusion (I/R) injury in rats. Forty rats were divided into four groups (n=10 for each): sham-operated (sham), I/R, I/R + P100 (100 mg/kg, 30 min before torsion), and I/R + P200 (200 mg/kg, 30 min before torsion). Testicular T/D was performed on the left testicle by 3 hours of torsion at 720 degrees clockwise, followed by 3 hours of detorsion. In the I/R group, an increase in malondialdehyde (MDA) levels and a decrease in glutathione (GSH), vitamin C (Vit C), glutathione peroxidase (GPx), glucose-6-phosphate dehydrogenase (G6PD) values were determined compared to the sham group (p <0.001). Moreover, an increase in the expression of cleaved caspase-3 and Bcl2-associated X protein (Bax), a decrease in the expression of B-cell lymphoma 2 (Bcl2) and proliferating cell nuclear antigen (PCNA) were detected in the I/R group (p <0.001). Histopathologically, it was determined that the Johnsen and Cosentino scores of the testicles were irregular in the I/R group (p <0.001). Proanthocyanidin treatment caused a decrease in MDA, cleaved caspase-3 and Bax levels and an increase in GSH, Vit C, GPx, G6PD, Bcl-2 and PCNA values. Additionally, Johnsen and Cosentino rearranged the scores. The present findings revealed the protective and curative effects of proanthocyanidin in organ damage due to testicular torsion/detorsion-induced ischemia/reperfusion with their antioxidative and antiapoptotic properties.