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Öğe Ameliorative effects of aminoguanidine on rat aorta in Streptozotocin-induced diabetes and evaluation of ?-SMA expression(Turkish Soc Cardiology, 2014) Elbe, Hulya; Vardi, Nigar; Orman, Dogan; Taslidere, Elif; Yildiz, AzibeObjective: Diabetes mellitus is one of the chronic metabolic diseases which is characterized by microvascular and macrovascular complications. This study was designed to investigate the improving the effects of amnioguanidine on aortic damage in a streptozotocin (STZ) induced diabetic rat model. Methods: Thirty-two male Sprague-Dawley rats divided into four groups as follows: Control, Aminoguanidine, Diabetes, and Diabetes+Aminoguanidine. Experimental diabetes was induced by single dose STZ (45 mg/kg) intraperitoneally. After administration of STZ, the DM+AMG group began to receive AMG (1 g/L) was prepared by dissolving in tap water during 10 weeks. At the end of the study, blood glucose levels were determined and rats were sacrified by ketamine anesthesia. Following routine tissue process, aortas were embedded in paraffin. Histochemical (H-E and Orcein) and immunohistochemical alpha-smooth muscle actin (alpha-SMA) stains were applied and the sections examined by light microscope. Statistical analysis was carried out using the SPSS 13.0 statistical program. Results: The rats in diabetes group had significantly higher blood glucose levels than the rats of control. The main histological alterations were detected in tunica media such as extensive thickening (414.32 +/- 9.62 mu m), irregular of elastic fibers and intensive alpha-SMA staining in diabetic rats. The thickness of tunica media was statistically increased in DM group, when compared with the control group (p<0.001). On the other hand, AMG prevented disorganization of elastic fibers and overexpression of alpha-SMA. The mean thickness of tunica media was decreased significantly in DM+AMG (319.16 +/- 6.53 mu m) compared with the DM group (p<0.001). Conclusion: Our results demonstrate that AMG treatment may protect the impairment of aort structure at histological level.Öğe Aminoguanidine mitigates apoptosis, testicular seminiferous tubules damage, and oxidative stress in streptozotocin-induced diabetic rats(Churchill Livingstone, 2015) Orman, Dogan; Vardi, Nigar; Ates, Burhan; Taslidere, Elif; Elbe, HulyaThis study aimed to investigate the effect of aminoguanidine (AG) against testicular damage streptozotocin (STZ) induced diabetes. Thirty two rats were separated into four groups: control, AG, STZ and STZ + AG. In the STZ group, 12.5 +/- 1.3% of tubules were seen as containing sloughed spermatogenic cells into the lumen, 28.7 +/- 1.8% of tubules were atrophic, 46.2 +/- 2.1% of tubules were degenerative and 8.5 +/- 0.9% of tubules contained giant cells. Statistically, the affected tubule number was significantly lower in the STZ + AG group than in the STZ group. Intensely stained caspase-3 cells showed a statistically significant increase in the STZ group, while it decreased in the STZ + AG group. The enzyme activities of catalase (CAT), superoxide dismutase (SOD) and glutathione (GSH) level decreased and the level of malondialdehyde (MDA) and nitric oxide (NO) increased in the STZ group, while AG treated diabetic rats showed an increase of CAT, SOD activity and GSH level and a decrease in MDA and NO levels. This study shows that the oxidative stress, increased NO level and apoptotic cell death play an important role in diabetic rat testicular damage and that AG treatment of diabetic rats results in protection of spermatogenic cells against oxidative stress and apoptotic cell death. (C) 2015 Elsevier Ltd. All rights reserved.Öğe Anti-Apoptotic Effects of Aminoguanidine Against Liver Damage on Experimental Diabetes in Rats(İnönü Üniversitesi Tıp Fakültesi Dergisi, 2014) Taslidere, Elif; Vardi, Nigar; Orman, Dogan; Elbe, HulyaObjective: This study was designed to investigate the antiapoptotic and improving effects of aminoguanidine on the histological alterations in liver in streptozotocin (STZ)-induced diabetic rat model. Material and Methods: 32 male Sprague Dawley rats were divided into the following 4 groups: Control, Aminoguanidine (AMG), Streptozotocin (STZ), Streptozotocin + Aminoguanidine (STZ+AMG). The animals in group STZ and STZ+AMG were made diabetic by intraperitoneal injection of streptozotocin 45 mg/kg. Histochemical and immunohistochemical staining methods were applied to sections obtained from paraffin blocks and preparations were examined by using Leica DFC-280 light microscope. Results: The sections taken from the control and AMG groups were normal in histological appearance. However, multifocal nodules containing inflammatory cells were observed in the diabetic group. Moreover necrotic hepatocytes and hemorrhagic areas were observed among intact hepatocyte of lobul in the STZ group. Glycogen loss was observed in the hepatocytes localized at the periphery of lobule. In addition, the numbers of cells with positive staining by caspase-3 were significantly increased. On the other hand, it was seen that, in the groups administered with STZ, histological injury in the liver was attenuated by the administration of AMG. Moreover, it was found that the number of caspase-3 positive cells was significantly decreased in the STZ+AMG group. Conclusion: We concluded that chronic aminoguanidine administration reduced liver injury in STZ- induced diabetic rats. Thus, we suggest that aminoguanidine may be used to prevent the development of diabetic liver damage.Öğe Cytoprotective effects of amifostine, ascorbic acid and N-acetylcysteine against methotrexate-induced hepatotoxicity in rats(Baishideng Publishing Group Inc, 2014) Akbulut, Sami; Elbe, Hulya; Eris, Cengiz; Dogan, Zumrut; Toprak, Gulten; Otan, Emrah; Erdemli, ErmanAIM: To investigate the potential role of oxidative stress and the possible therapeutic effects of N-acetyl cysteine (NAC), amifostine (AMF) and ascorbic acid (ASC) in methotrexate (MTX)-induced hepatotoxicity. METHODS: An MTX-induced hepatotoxicity model was established in 44 male Sprague Dawley rats by administration of a single intraperitoneal injection of 20 mg/kg MTX. Eleven of the rats were left untreated (Model group; n = 11), and the remaining rats were treated with a 7-d course of 50 mg/kg per day NAC (MTX + NAC group; n = 11), 50 mg/kg per single dose AMF (MTX + AMF group; n = 11), or 10 mg/kg per day ASC (MTX + ASC group; n = 11). Eleven rats that received no MTX and no treatments served as the negative control group. Structural and functional changes related to MTX- and the various treatments were assessed by histopathological analysis of liver tissues and biochemical assays of malondialdehyde (MDA), superoxide dismutase (SOD), catalase, glutathione (GSH) and xanthine oxidase activities and of serum levels of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase and total bilirubin. RESULTS: Exposure to MTX caused structural and functional hepatotoxicity, as evidenced by significantly worse histopathological scores [median (range) injury score: control group: 1 (0-3) vs 7 (6-9), p = 0.001] and significantly higher MDA activity [409 (352-466) nmol/g vs 455.5 (419-516) nmol/g, p < 0.05]. The extent of MTX-induced perturbation of both parameters was reduced by all three cytoprotective agents, but only the reduction in hepatotoxicity scores reached statistical significance [4 (3-6) for NAC, 4.5 (3-5) for AMF and 6 (5-6) for ASC; p = 0.001, p = 0.001 and p < 0.005 vs model group respectively]. Exposure to MTX also caused a significant reduction in the activities of GSH and SOD antioxidants in liver tissues [control group: 3.02 (2.85-3.43) mu mol/g and 71.78 (61.88-97.81) U/g vs model group: 2.52 (2.07-3.34) mu mol/g and 61.46 (58.27-67.75) U/g, p < 0.05]; however, only the NAC treatment provided significant increases in these antioxidant enzyme activities [3.22 (2.54-3.62) mu mol/g and 69.22 (61.13-100.88) U/g, p < 0.05 and p < 0.01 vs model group respectively]. CONCLUSION: MTX-induced structural and functional damage to hepatic tissues in rats may involve oxidative stress, and cytoprotective agents (NAC > AMF > ASC) may alleviate MTX hepatotoxicity. (C) 2014 Baishideng Publishing Group Inc. All rights reserved.Öğe Dexmedetomidine attenuates lung injury induced by liver ischemia-reperfusion injury in rats(Scientific Publishers India, 2017) Sahin, Taylan; Begec, Zekine; Elbe, Hulya; Vardi, Nigar; Durmus, Mahmut; Ersoy, M. OzcanObjectives: It was aimed to evaluate histological effects of different doses of dexmedetomidine on lung injury induced by liver ischemia-reperfusion in rats. Materials and methods: Forty rats were included into the study in Inonu University Animal laboratory at 2013, In Group 1, the liver was manipulated and no occlusion of the vessels of the liver was performed. In IR Group 2, 60 min of ischemia and 60 min of reperfusion were applied. In Group 3, 10 mu g/kg of dexmedetomidine was injected into the peritoneal cavity 30 min before ischemia. In Group 4, 100 mu g/kg of dexmedetomidine was administered via intraperitoneal route 30 min before ischemia. Further procedures in groups 3 and 4 were the same as those of group 2. After the experiment was completed, the rats were killed and then histologic assessments were performed to the lung tissues. Results: Histopathological damage score in group 2 was higher than in group 1. Although lung damage was recognized as alleviated in group 3, the lesions did not completely improve. However, treatment with 100 mu g/kg of dexmedetomidine was more effective than 10 mu g/kg of dexmedetomidine injection in respect to protection of alveolar structures. The difference was found to be statistically significant between group 3 and group 4 in terms of histopathological damage score. Conclusions: The present study suggests that dexmedetomidine administration may be beneficial for preventing lung injury induced by hepatic IR.Öğe Effect of crocin on oxidative stress in recovery from single bout of swimming exercise in rats(General Physiol And Biophysics, 2016) Altinoz, Eyup; Ozmen, Tarik; Oner, Zulal; Elbe, Hulya; Erdemli, Mehmet E.; Bag, Harika G.Physical exercise could cause muscle and tissue damage due to increase in the formation of free oxygen radicals during exercise. The aim of the present study was to investigate the effect of crocin on parameters associated with oxidative stress in recovery from acute swimming exercise in rats. Rats were divided into eight groups; Normal Control (NC, untreated and did not swim), Crocin Control (CC, received crocin and did not swim), Exe-1, Exe-24, Exe-48 (untreated and swam) and and Exe-Cro-1, Exe-Cro-24, Exe-Cro-48 (received crocin and swam). AST, ALP, LDH, CK, XO enzymes levels increased after swimming in untreated and crocin-treated groups, but there was a less increase in crocin-treated groups. The highest MDA levels in serum were determined in Exe-1 compared with all other groups. There was significant difference between control and exercise groups in MDA level (p = 0.033). In contrast, there was significant difference between control and exercise groups in GSH level (p < 0.001). In addition, crocin given to swimming rats significantly increased GSH levels (p < 0.05) and decreased MDA levels when compared with untreated exercise groups. In conclusion, crocin is able to protect liver and skeletal muscle tissue against exercise-induced oxidative damage by preventing reactive oxygen species (ROS) production.Öğe THE EFFECT OF SAFFRON (ITS ACTIVE CONSTITUENT, CROCIN) ON THE CARDIOVASCULAR COMPLICATION AND DYSLIPIDEMIA IN STREPTOZOTOCIN INDUCED DIABETIC RATS(African Networks Ethnomedicines, 2015) Altinoz, Eyup; Taskin, Emre; Oner, Zulal; Elbe, Hulya; Arslan, Belkis AtaseverBackground: Diabetes mellitus (DM) causes serious complications such as coronary heart disease, atherosclerosis, nephropathy, retinopathy and neuropathy. Materials and Methods: Rats were randomly divided into three groups, each containing 10 rats: control group, DM group; DM+crocin group. Normal saline was administered in the control and DM groups, and crocin was administered in DM+crocin group at a dose of 20 mg/kg bw/day for 21 days. Trunk blood and the hearth tissue were collected for histopathological and biochemical examination. Results: DM led to increment of MDA levels (p<0.05) and the serum levels of total cholesterol, TG, LDL and VLDL (p<0.05) and decrease of GSH levels (p<0.01) compared to control group in serum and heart tissue. Diabetic rats were treated with crocin, MDA levels (p<0.05) and the levels of total cholesterol, TG and VLDL decreased significantly, but GSH levels (p<0.05) increased remarkably compared to DM rats. Statistically significant increase in histopathological damage score was found in the DM group (p<0.0001). Histopathological changes markedly regressed in DM+crocin group. Conclusion: Our results showed that crocin might prevent diabetes induced cardiovascular complications by reduction of oxidative stress and dyslipidemia.Öğe Effects of antioxidant agents against cyclosporine-induced hepatotoxicity(Academic Press Inc Elsevier Science, 2015) Akbulut, Sami; Elbe, Hulya; Eris, Cengiz; Dogan, Zumrut; Toprak, Gulten; Yalcin, Erhan; Otan, EmrahBackground: To investigate the potential protective antioxidant role of ursodeoxycholic acid (UDCA), melatonin, and allopurinol treatment in cyclosporine (CsA)-induced hepatotoxicity. Methods: Hepatotoxicity was established in Sprague-Dawley rats by daily administration of CsA. Treatment groups were additionally administered UDCA, melatonin, or allopurinol treatments. Rats that received no CsA and no treatments served as a control group. Liver samples from each group were examined by histopathologic analysis to determine the effects of CsA treatment on liver morphology. Biochemical assays were also used to determine the effect of CsA treatment on liver function, in the presence or absence of UDCA, melatonin, or allopurinol. Results: CsA treatment induced hepatotoxicity, resulting in sinusoidal dilatation, congestion, infiltration, hydropic degeneration, and loss of glycogen storage in the liver. From a molecular perspective, the CsA treatment increased levels of malondialdehyde (MDA) levels, decreased levels of reduced glutathione and xanthine oxidase, and decreased activities of superoxide dismutase and catalase. The CsA treatment also resulted in decreased serum total antioxidant capacity, whereas alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, total bilirubin levels, and total oxidant status were increased. Treatment with UDCA, melatonin, or allopurinol reduced the CsA-induced histopathologic changes, as compared with CsA-treated samples. In addition, UDCA, melatonin, or allopurinol treatment mitigated the CsA-induced effects on glutathione and MDA levels, and on superoxide dismutase and catalase activities, as well as reduced the CsA-mediated perturbations in serum levels of total antioxidant capacity, total oxidant status, and alkaline phosphatase. Conclusions: UDCA, allopurinol, and melatonin may each help to protect against CsA-induced damage to liver tissues, possibly through effects on the antioxidant system. (C) 2015 Elsevier Inc. All rights reserved.Öğe Effects of Quercetin on Cisplatin-Induced Renal Damage in Wistar Albino Rats(Galenos Publ House, 2022) Cetinavci, Dilan; Elbe, Hulya; Taslidere, Elif; Bostancieri, Nuray; Taslidere, AsliAim: Cisplatin is one of the effective antineoplastic drugs widely used in the treatment of many types of cancer. Cisplatin has harmful effects such as nephrotoxicity, ototoxicity and cardiomyopathy. Quercetin is an antioxidant of the flavonoid group. In this study, it was aimed to investigate the therapeutic effects of quercetin against cisplatin-induced kidney damage in rats. Materials and Methods: Twenty-eight male Wistar albino rats were randomly selected and divided into 4 groups: Group 1: Control (no application), Group 2: Quercetin (25 mg/kg/7 days/intraperitoneal), Group 3: Cisplatin (7 mg/kg/single dose/ intraperitoneal), Group 4: Cisplatin+quercetin (7 mg) /kg/single dose/ intraperitoneal cisplatin followed by 25 mg/kg/7 days/ intraperitoneal quercetin). After routine histological follow-up, hematoxylin eosin and periodic acid-schiff staining were performed. Histopathological damage score was calculated. Caspase-3 immunostaining was performed and scored. Results: Control and quercetin groups had normal histological appearance. In the cisplatin group, dilatation of the tubules, epithelial shedding, vacuolization of the tubular epithelial cells, and loss of microvilli in the proximal tubules were detected. In addition, infiltration areas were also found in places. In addition, an increase in caspase-3 immunostaining intensity was detected in this group (p=0.000). Histopathological findings were significantly reduced in the cisplatin+quercetin group compared to the cisplatin group (p=0.001). Conclusion: In this study, we think that quercetin is histopathologically beneficial in the treatment of cisplatin-induced kidney damage.Öğe Effects of varenicline on lung tissue in the animal model(Soc Brasileira Pneumologia Tisiologia, 2020) Ermis, Hilal; Parlakpinar, Hakan; Elbe, Hulya; Vardi, Nigar; Polat, Alaaddin; Gulbas, Gazi[Abstract Not Available]Öğe Endotoxin exposure and puberty in female rats: the role of nitric oxide and caspase-1 inhibition in neonates(Canadian Science Publishing, Nrc Research Press, 2015) Ozgocer, Tuba; Yildiz, Sedat; Elbe, Hulya; Vardi, NigarBacterial toxins are widespread in the environment as well as in the digestive system of humans and animals. Toxin from Gram-negative bacteria (endotoxin or lipopolysaccharide; LPS) has a life-long programming effect on reproduction in rats, but the mediators have not been well-documented, so we investigated the effects of LPS on the timing of puberty in female rats. Because the levels of nitric oxide (NO) and interleukin 1 beta (IL-1 beta) increase following injection of LPS, we injected neonates (post-natal day (pnd) 7) with LPS, with or without NO or IL-1 beta inhibitors. Half of the prepubescent (pnd 30) animals received an additional LPS injection. Vaginal opening, number of ovarian follicles, and serum anti-LPS antibodies were determined. A single LPS injection was sufficient to reduce the primordial follicle pool, but puberty was delayed when rats received 2 LPS injections (at pnd 7 and 30). NO or IL-1 beta inhibitors improved both of these parameters, suggesting that the early detrimental effects of LPS on puberty and primordial follicle pool are mediated by NO and IL-1 beta.Öğe Histological and Biochemical Effects of Dexmedetomidine on Liver during an Inflammatory Bowel Disease(Informa Healthcare, 2015) Gul, Mehmet; Kayhan, Basak; Elbe, Hulya; Dogan, Zumrut; Otlu, AliInflammation in the liver is an extraintestinal manifestation that is frequently seen during inflammatory bowel diseases (IBD). The authors investigated histopathologycal, ultrastructural and antioxidant effects of dexmedetomidine (Dex) on liver during trinitrobenzene sulfonic acid (TNBS)-induced inflammatory bowel disease. Thirty-two BALB/c mice were divided (n = 8) as follows: control; Dex (dexmedetomidine) (30 mu g/kg) for 6 days; TNBS 150 mu L, TNBS_ethanol (50% w/v) intrarectally; TNBS_Dex. The histopathological and ultrastructural changes were evaluated. The levels of malondialdehyde (MDA), activity of antioxidant enzymes (GPx and SOD) were measured in liver tissue. Induction of colitis induced histopathological and ultrastructural changes of damage in liver. Those changes were markedly reduced in the TNBS_Dex group and that reduction was even significant in comparison to the TNBS group. MDA levels were significantly higher in the TNBS group and dexmedetomidine significantly elevated SOD levels in the TNBS_Dex group. These results suggest that the administration of dexmedetomidine reduces the histopathological and ultrastructural damage and increases the defense capacity against oxidative damage on liver in this IBD mice model.Öğe Linalool exhibits therapeutic and protective effects in a rat model of doxorubicin-induced kidney injury by modulating oxidative stress(Taylor & Francis Ltd, 2022) Altinoz, Eyup; Oner, Zulal; Elbe, Hulya; Uremis, Nuray; Uremis, MuhammedThe aim of the present study was to investigate the therapeutic and protective effects of linalool against doxorubicin (DOX)-induced kidney injury. Forty-eight Wistar rats were divided into 8 groups as follows; Control, DOX [20 mg/kg, intraperitoneal (ip) single dose DOX], linalool (LIN50 and LIN100; 50 mg/kg and 100 mg/kg linalool via ip for 5 days, respectively), DOX + LIN50 and DOX + LIN100 (20 mg/kg single dose of DOX via ip on first day and 50 mg/kg and 100 mg/kg linalool via ip, respectively), LIN50 + DOX and LIN100 + DOX (50 mg/kg and 100 mg/kg linalool via ip for 5 days, respectively and 20 mg/kg single dose of DOX via ip on fifth day). Doxorubicin led to a significant increase in the level of malondialdehyde (MDA) in the kidney, whereas superoxide dismutase (SOD), catalase (CAT) and reduced glutathione (GSH) levels decreased remarkably when compared with control. On the other hand, LIN supplementation before and after DOX treatment led to a significant decrease in MDA and also increases in SOD, CAT and GSH levels. DOX caused significant increases in the levels of blood urea nitrogen (BUN) and creatinine (Cr) levels in the plasma, while LIN supplementation as a therapeutic and preventive agent led to significant decreases in BUN and Cr levels. The current study demonstrated that LIN supplementation after or before DOX treatment can led to therapeutic and preventive effects against DOX-induced renal damage.Öğe NEURO-PROTECTIVE EFFECTS OF CROCIN ON BRAIN AND CEREBELLUM TISSUES IN DIABETIC RATS(African Networks Ethnomedicines, 2014) Altinoz, Eyup; Oner, Zulal; Elbe, Hulya; Vardi, NigarBackground: Increase in free oxygen radicals and the disruption of defense system make the neurons and astrocytes more sensitive against oxidative damage. Materials and Methods: Rats were divided into three groups containing 10, rats in each group namely: control (C) group, Diabetes Mellitus (DM) group, and Diabetes Mellitus + crocin (DM + crocin) group. Tissue samples were processed by routine histological and biochemical procedures. The sections were stained with Hematoxylen-eosin. Malondialdehyde (MDA), glutathione (GSH), blood glucose, HbA1c levels and xanthine oxidase (XO) activities were assayed. Results: The histological appearence of the cerebrum and cerebellum were normal in the control group. DM group showed some histopathological changes including congestion, perivascular and perineuronal edema in cerebrum. In DM + crocin group, histopathological changes in cerebrum and cerebellum markedly reduced. MDA level and XO activities increased significantly in DM group (P<0.01), but decreased significantly in DM + crocin group when compared to DM group (P<0.01). Blood glucose concentrations increased significantly (p<0.01) in DM group), but decreased significantly in DM + crocin group when compared with DM group (p<0.05). Blood HbA1c levels were normal in control group. But there were significant differences between control and DM groups (p<0.01). On the other hand, blood HbA1c levels decreased in DM + crocin group when compared with the DM group, but it was not statistically significant (p>0.05). Conclusion: Due to the fact that crocin has an antioxidant and anti-hyperglycemic effects, it can protect the brain and cerebellum tissue against the complications of oxidative stress.Öğe Protective Effects of Caffeic Acid Phenethyl Ester Against Carbon Tetrachloride-induced Testicular Damage in Rats: A Histological Study(Galenos Publ House, 2023) Gulhan, Belemir; Taslidere, Elif; Vardi, Nigar; Taslidere, Asli; Elbe, HulyaAim: Carbon tetrachloride (CCI4) is a volatile organic chemical agent that can cause damage to many tissues. Caffeic acid phenethyl ester (CAPE), which is structurally similar to flavonoids, is an active component of honeybee propolis. CAPE is known for its antitoxic, antioxidant, and antiinflammatory effects. In this study, we aimed to investigate the effects of CAPE against testicular damage caused by CCI4. Materials and Methods: Twenty-eight Wistar albino rats were divided into 4 groups (n=7) as, Group 1: control (5% ethanol, 1 mL/day/ip), Group 2: olive oil (0.5 mL/day over/ip), Group 3: CCI4 (0.5 mL/kg over/ip), Group 4: CCI4+CAPE (10 mu mol/kg/day/ip). Tissue samples collected at the end of the experiment were detected in 10% formaldehyde and embedded in paraffin. Five-micron-thick sections taken from paraffin blocks were stained with hematoxylin-eosin. To evaluate testicular damage, 100 tubules from each section were randomly examined at 20x magnification under a light microscope and classified as intact, atrophic, and degenerated tubules. Sections were examined by using Leica DFC 280 light microscope and Leica Q Win Image Analysis system (Leica Micros Imaging Solutions Ltd. Cambridge, UK). Results: The testicular sections of the control group and the olive oil group had a normal histological appearance. In the CCI4 group, 55.00 +/- 4.22% of the seminiferous tubules were intact, 25.00 +/- 2.67% were atrophic and 20.00 +/- 1.88% were degenerative. In addition, multinucleated giant cells were found in the lumen of some seminiferous tubules. In the CCI4+CAPE group, 72.14 +/- 3.91% of the tubules were intact, 16.42 +/- 2.10% were atrophic, and 11.42 +/- 2.36% were degenerative. While the number of affected tubules significantly increased in the CCI4 group compared to the control group (p<0.05), the number of affected seminiferous tubules decreased significantly in the CCI4+CAPE group compared to the CCI (4) group (p<0.05). Conclusion: We think that CAPE may be useful in reducing the damaging effects of CCI4 on the testicle.Öğe Protective effects of melatonin and quercetin on experimental lung injury induced by carbon tetrachloride in rats(Taylor & Francis Inc, 2014) Taslidere, Elif; Esrefoglu, Mukaddes; Elbe, Hulya; Cetin, Asli; Ates, BurhanIntroduction: Exposure to carbon tetrachloride (CCl4), a well-known toxicant, causes tissue damage by inducing oxidative stress via formation of free radicals. The fundamental structure of the organs of rats and humans is similar, so administration of CCl4 to rats is an accepted experimental model to produce oxidative damage to various tissues including pulmonary tissue. In this study, we evaluated the protective capacity of melatonin and quercetin against CCl4-induced oxidative lung damage in rats. Material-Metods: Rats were divided into five groups each containing seven rats as follows: Control group, Olive oil group CCl4 group, CCl4+Melatonin, and CCl4+Quercetin group. The tissue samples were processed by routine histological and biochemical procedures. Sections were stained with Hematoxylin-eosin and Masson's trichrome. Histopathologic damage score was calculated. Malondialdehyde (MDA) and glutathione (GSH) levels and catalase (CAT) activities were assayed. Results: The lung sections of control groups showed normal histological characteristics. Fibrosis, interstitial hemorrhage, epithelial desquamation in bronchiole and alveoli, intra-alveolar edema, leukocyte, and macrophage infiltration were observed in lung sections of rats exposed to CCl4 alone. The findings were reduced in the treatments groups. The MDA level in the CCl4 group were significantly higher than in the other groups (p < .001), and the CAT and GSH levels in the CCl4+Mel and CCl4+Quer groups were significantly higher than in the CCl4 group (p < .05). Conclusion: In conclusion, we suggest that agents with antioxidant properties such as melatonin and quercetin may have positive effects in the treatment of pulmonary diseases characterized by especially edema, inflammation, and fibrosis.Öğe Protective effects of quercetin against testis damage caused by cisplatin(Taylor & Francis Ltd, 2022) Bostancieri, Nuray; Taslidere, Asli; Elbe, Hulya; Taslidere, ElifWe investigated the effects of quercetin on cisplatin induced testicular toxicity using histopathological, immunohistochemical and biochemical methods. We used four groups of Wistar albino male: control, quercetin, cisplatin, cisplatin + quercetin. We measured tissue malondialdehyde (MDA) and catalase (CAT) biochemically. We assessed apoptosis as indicated by P63 immunoreactivity. Testis tissues of the control group exhibited normal histology. In the cisplatin group, the diameter of the seminiferous tubule and thickness of the germinal epithelium were decreased compared to the control group. In the cisplatin group, degeneration of the germinal epithelium, cell separation from the basal membrane, giant cell formation, cell loss, atrophy and vacuolization were observed in the seminiferous tubule. We found hyalinization around the seminiferous tubule, intertubule hyalinization and perivascular fibrosis. In the cisplatin + quercetin group, we found that quercetin decreased atrophy, giant cell formation and vacuolization significantly. We found that quercetin exhibited ameliorative effects following cisplatin induced testicular damage.Öğe Resveratrol reduces light and electron microscopic changes in acetaminophen-induced hepatotoxicity in rats: Role of iNOS expression(Taylor & Francis Inc, 2018) Elbe, Hulya; Gul, Mehmet; Cetin, Asli; Taslidere, Elif; Ozyalin, Fatma; Turkoz, Yusuf; Otlu, AliIntroduction: Hepatotoxicity is amajor complication of acetaminophen (APAP), a widely used analgesic and antipyretic drug. Resveratrol (RSV) is a naturally occurring diphenol and it has anticancer, antioxidant, and anti-inflammatory properties. Objectives: In this study, the beneficial effects of RSV on APAP-induced hepatotoxicity was investigated in rats. Materials and methods: Group 1: Ethanol, Group 2: Saline, Group 3: RSV (10 mg/kg/ip), Group 4: APAP (1000 mg/kg/ip/single dose), Group 5: APAP+RSV (20 min after administration of APAP). The rats were sacrificed 24 h after administration of APAP. Light and electron microscopic changes were evaluated. Levels of malondialdehyde (MDA) and glutathione (GSH), catalase (CAT), and superoxide dismutase (SOD) activities were determined in liver tissue. Results: Rats of the ethanol, saline, and RSV groups did not present any histopathological alterations. In the APAP group, we observed vascular congestion, necrosis, inflammation, sinusoidal dilatation, and loss of glycogen content. In the APAP+RSV group, these changes were markedly reduced. iNOS immunostaining showed very weak positive stained hepatocytes the sections of control, saline, and RSV groups. However, in the APAP group, iNOS immunostaining was most evident in pericentral hepatocytes. In the same areas in APAP+RSV group, intensity of iNOS immunostaining decreased. A significant increase in MDA and decreases in GSH level, CAT, and SOD activity indicated that APAP-induced hepatotoxicity was mediated through oxidative stress. Significant beneficial changes were noted in tissue oxidative stress indicators in rats treatedwith RSV. Conclusion: These biochemical, histopathological, and ultrastructural findings revealed that RSV reduced the severity of APAP-induced alterations in liver.
