Person: ÇETİNEL, ŞULE
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ÇETİNEL
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ŞULE
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Publication Metadata only alpha-lipoic acid protects against renal ischaemia-reperfusion injury in rats(BLACKWELL PUBLISHING, 2008) YÜKSEL, MERAL; Sehirli, Oezer; Sener, Emre; Cetinel, Ule; Yueksel, Meral; Gedik, Nursal; Sener, Goeksel1. Oxygen free radicals are important components involved in the pathophysiological processes observed during ischaemia-reperfusion (I/R). The present study was designed to assess the possible protective effect of et-lipoic acid (ALA) on renal I/R injury. 2. Wistar albino rats were unilaterally nephrectomized and subjected to 45 min renal pedicle occlusion followed by 24 h reperfusion. Saline or ALA (100 mg/kg, i.p.) was administered 15 min prior to ischaemia and immediately before the reperfusion period. At the end of 24 h, rats were decapitated and trunk blood was collected. Creatinine, blood urea nitrogen (BUN) and lactate dehydrogenase (LDH) activity were measured in serum samples, whereas tumour necrosis factor (TNF)-alpha, interleukin (IL)-1 beta, IL-6, 8-hydroxydeoxyguanosine (8-OHdG) and total anti-oxidant capacity (AOC) were assayed in plasma samples. 3. Kidney samples were taken for the determination of tissue malondialdehyde (MDA) and glutathione (GSH) levels, as well as Na/K-ATPase and myeloperoxidase (MPO) activity. The formation of reactive oxygen species in renal tissue samples was monitored using a chemiluminescence (CL) technique with luminol and lucigenin probes. Oxidant-induced tissue fibrosis was determined by tissue collagen content and the extent of tissue injury was analysed microscopically. 4. Ischaemia-reperfusion caused a significant increases in blood creatinine, BUN, LDH, IL-1 beta, IL-6, TNF-alpha and 8-OHdG, whereas AOC was decreased. In kidney samples from the I/R group, MDA, MPO, collagen and CL levels were found to be increased significantly; however, glutathione levels and Na/KATPase activity were decreased. Conversely, ALA treatment reversed all these biochemical indices, as well as histopathological alterations induced by I/R. 5. In conclusion, these data suggest that ALA reverses I/R-induced oxidant responses and improves microscopic damage and renal function. Thus, it seems likely that ALA protects kidney tissues by inhibiting neutrophil infiltration, balancing the oxidant-anti-oxidant status and regulating the generation of inflammatory mediators.Publication Metadata only Beneficial effects of quercetin on rat urinary bladder after spinal cord injury(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2013) ŞENER, AZİZE; Cevik, Ozge; Ersahim, Mehmet; Sener, T. Emre; Tinay, Ilker; Tarcan, Tufan; Cetinel, Sule; Sener, Azize; Toklu, Hale Z.; Sener, GokselBackground: Spinal cord injury (SCI) leads to an inflammatory response and generates oxidative stress, which has deleterious effects on the function of several organ systems, including the urinary bladder. The present study was designed to investigate the putative beneficial effect of quercetin against SCI-induced bladder damage. Materials and methods: In order to induce SCI, a standard weight-drop method that induced a moderately severe injury (100 g/cm force) at T10 was used. Injured animals were given either 20 mg/kg quercetin or vehicle 15 min post injury and repeated twice daily for 7 d. After decapitation, bladder strips were placed in organ bath and isometric contractions to carbachol (10(-8) to10(-4) M) were recorded. In order to examine oxidative tissue injury, luminol chemiluminescence, nitric oxide, malondialdehyde, and glutathione levels and superoxide dismutase, myeloperoxidase, and caspase 3 activities of bladder tissues were measured along with histologic evaluations. Proinflammatory cytokines tumor necrosis factor alpha, interleukin 1 beta, and interleukin 6 were also assayed in blood samples. Results: In the injured animals, the contractile responses of the bladder strips were lower than those of the control group and were reversed by treatment with quercetin. On the other hand, increase in nitric oxide, malondialdehyde, luminol chemiluminescence levels, and myeloperoxidase and caspase 3 activities of tissues in the SCI group were significantly reversed by quercetin treatment. Similarly, plasma cytokine levels, which were elevated in the vehicle-treated SCI group, were reduced with quercetin treatment. Furthermore, treatment with quercetin also prevented the depletion of tissue glutathione levels and superoxide dismutase activity seen in the SCI group. Conclusions: According to the results, quercetin exerts beneficial effects against SCI-induced oxidative damage through its anti-inflammatory and antioxidant effects. (c) 2013 Elsevier Inc. All rights reserved.Publication Open Access The effects of Urtica dioica L. ethanolic extract against urinary calculi in rats(MARMARA UNIV, 2020-03-12) DOĞAN, AHMET; Keles, Rumeysa; Sen, Ali; Ertas, Busra; Kayali, Damla; Eker, Pinar; Sener, Tarik Emre; Dogan, Ahmet; Cetinel, Sule; Sener, GokselNephrolithiasis is common urological problem and stone formation has multiple underlying pathogenetic factors. We investigated the possible preventive and therapeutic effect of Urtica dioica ethanol extract (UD) on ethylene glycol-induced nephrolithiasis model in rats. Sprague-Daw ley rats were divided into lour groups (n = 10). The control group was given normal drinking water for 8 weeks and was administered vehicle by gastric gavage. Stone formation was induced by adding 0.75% ethylene glycol (EG) to their drinking water. UD (700 mg/kg) was given orally lor 8 weeks to the preventive group and I or last 4 weeks to the treatment respectively. At the end of the experiment, urine, blood samples and kidney tissues were obtained. In 24-hour urine samples, calcium and citrate levels were decreased and oxalate levels were increased in EG whereas LID treatment groups reversed these parameters back to control levels. In addition, serum levels of creatinine and urea were increased in EG while LID significantly reduced these parameters. Malondialdehyde, 8-hydroxydeoxyguanosine and tumor necrosis alpha levels, and caspase- 3 and N-acetyl-beta-glucosaminidase activities were elevated in EG group and showed a decrease in LID treated groups. Glutathione level was decreased in EG group, whereas it was increased in UD preventive group. Histological examination showed an improvement in UD treated groups. Our results suggest that UD is effective both in prevention and treatment for kidney stones. The mechanism underlying this effect may be the antioxidant effect of UD and the effect on the concentration of stone-forming components in the urine.