Browsing by Author "Cevik, O."

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Dodder (Cuscuta Sp.) Extract Ameliorates Liver Fibrosis in Bile Duct-Ligated Rats
(Istanbul University Press, 2022) Albayrak, O.; Ozbeyli, D.; Sen, A.; Cevik, O.; Erdogan, O.; Ercan, F.; Sener, G.
Objective: The aim is to examine the possible protective effect of Cuscuta sp. extract against liver damage induced by biliary obstruction in rats. Materials and Methods: To induce biliary obstruction, the bile duct ligation (BDL) method was used. Sprague Dawley rats were allocated to 4 groups: Control (C), Cuscuta (CUS), bile duct ligation (BDL), and bile duct ligation + Cuscuta (BDL+CUS). Control and BDL rats were given physiological saline (SF), while CUS and BDL+CUS groups were administered 250 mg/ kg of Cuscuta extract by oral gavage. At the end of 28th day, the rats were decapitated, serum and tissue samples were collected, and aspartate aminotransferase (AST), alanine transaminase (ALT), and direct and total bilirubin (DB and TB) levels were determined in blood samples. In liver tissues, transforming growth factor-β (TGF-β), 8-hydroxyguanosine (8-OHdG), hydroxyproline, and sodium-potassium ATPase (Na+/K+-ATPase) levels were determined. Results: Serum samples of rats with cholestasis had high ALT, AST, DB, and TB levels, while TGF-β, 8-OHdG, and hydroxyproline concentrations were found to be significantly high in tissues. Hepatic Na+/K+-ATPase levels were decreased through biliary obstruction. Biochemical parameters were drastically reversed by Cuscuta care; also, this was supported histologically. Conclusion: Results showed that Cuscuta extract, through its antioxidant and anti-inflammatory properties, provided protection against oxidative injury by biliary obstruction. Also, these results confirm the traditional use of Cuscuta sp. as hepatoprotective. © Ankara Medical Journal.All rights reserved.
Citation - Scopus: 0
The Effect of Myrtus Communis L. Extract on Nephrolithiasis Model in Rats
(Kare Publishing, 2024) Ertas, B.; Dorucu, D.; Gulerturk, O.; Sen, A.; Cevik, O.; Cetinel, S.; Sener, G.
OBJECTIVE: Nephrolithiasis is a common urological disease that can lead to renal failure. Oxidative stress has been shown to be a contributing factor for nephrolithiasis and many agents have been studied to prevent and treat oxidative stress-related nephrolithiasis and renal damage. Myrtus communis (MC) extract has been shown to be an important antioxidant in different animal models. In this study, MC extract was administered preventively or therapeutically to rats with kidney stones, and its effectiveness was investigated. METHODS: Wistar albino rats were divided into four groups (n=8); control (C), ethylene glycol (EG), EG+preventive MC, and EG+curative MC groups. The nephrolithiasis model was created by adding 0.75% EG to drinking water for 8 weeks. Ultimately, 24-hour urine was collected to measure calcium, citrate, and creatinine levels. After decapitation, kidney tissues were harvested for histological analyses, measurement of osteopontin and 8-hydroxydeoxyguanosine (8-OHdG) levels, and N-acetyl-β-glucosaminidase (NAG), myeloperoxidase (MPO) and caspase-3 activities. RESULTS: In 24-hour urine samples, calcium, citrate and creatinine levels were decreased in the EG group, while oxalate levels were increased and in treatment groups these parameters returned to control levels. MPO, 8-OHdG, caspase-3 and NAG activity were significantly increased in tissue and these changes were reversed in both MC groups. Histological findings also supported the biochemical parameters. CONCLUSION: MC can reduce oxidative stress and histopathological changes in kidney tissues in rat nephrolithiasis model when used as either a preventive or therapeutic agent. If supported with further clinical trials, MC might have clinical implications in preventing oxidative renal cell injury and ultimately kidney stone formation. © 2024 by Istanbul Provincial Directorate of Health.