Browsing by Author "Sahinturk, Varol"

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Cardioprotective effects of Hypericum triquetrifolium Turra. against cyclophosphamide related cardiotoxicity in rats
(2018) Cetik Yildiz, Songul; KESKİN, Cumali; Sahinturk, Varol; Ayhanci, Adnan
ABSTRACT: Cyclophosphamide (CYP) is commonly used as anticancer agent but its usage is limited by cardiotoxic side effects such as dose-dependent cardiac damage, morphologically defined necrosis and bleeding. Hypericum triquetrifolium Turra. (HT) shows anti-oxidative and anticarciogenic properties with its rich phenolic contents. The current study was designed to investigate the possible protective effect of HT on CYP-induced cardiotoxicity. Albino rats were randomly divided into 9 groups, each included 7 animals. Serum creatine kinase-MB (CK-MB), malondialdehyde (MDA), aspartate transaminase (AST), glutathione (GSH), total antioxidant (TAC) and total oxidant capacity (TOC) levels were investigated. Furthermore, the cardiac tissue samples were investigated histopatologically. While the levels of serum CK-MB, MDA, AST and TOC were high, the levels of serum GSH and TAC levels were low in the CYP groups. It was also observed that CYP-induced cardiotoxicity was dose dependent. In the treatment with CYP plus HT doses there was observed an essential decrease in the CYP cardiotoxicity; decreased cell damage and oxidative stress parameters and also increased GSH and TAC levels. Based on our findings, it can be proposed that HT seed methanol extract was a strong candidate in preventing the CYP-induced cardiotoxicity.
Hematoprotective Effect of N(G)-Nitro-L-Arginine Methyl Ester and Lycopene on Hematoxicity in Trinitrobenzene Sulfonic Acid–Induced Colitis in Rat
(2015) Cetik, Songul; Ayhanci, Adnan; Altuner, Yilmaz; Musmul, Ahmet; Sahinturk, Varol
Anemia is a neglected manifestation of inflammatory bowel disease (IBD) although it is commonly observed in IBD patients. Attempts to overcome anemia in IBD would help not only general well being of the patients but also minimize disease consequences. In this experimental study, the possible hematoprotective effects of lycopene and NG–nitro-L-arginine methyl ester (L-NAME) on colitis induced by TNBS were analyzed. 112 rats were assigned to 16 groups; control group, intrarectal 120 mg/kg TNBS group, intraperitoneal 40 mg/kg L-NAME group, 1 mg/kg olive oil group, 5 and 10 mg/kg lycopene groups. Each experimental group was divided into 3 subgroups according to duration of treatment. On the very first day of treatment number of erythrocytes decreased in all groups except TNBS treated group whereas leukocyte numbers increased in all groups except TNBS treated group pointing out an inflammation. The number of platelets decreased in all study groups with the exception of TNBS group. On the second day, while erythrocyte and platelet numbers increased in all but not in TNBS group, leukocytes decreased in all the groups. On the third day, erythrocyte and platelet numbers increased in all groups except for the 10 mg/kg lycopene group. While the number of leukocytes decreased in the 10 mg/kg lycopene group, it remained the same in the other groups as those observed on the second day. These results show that lycopene could have effects on hemopoiesis as well as in prevention of anemia in IBD.
A Histopathological, Immunohistochemical and Biochemical Investigation on the in vitro Antioxidant, Myeloprotective, Hematoprotective and Hepatoprotective Effects of Hypericum triquetrifolium Seed Extract Against Cyclophosphamide-Induced Toxicity
(2019) Cetik Yildiz, Songul; Keskin, Cumali; Sahinturk, Varol; Ayhanci, Adnan
The aim of this study was to investigate in vitro antioxidant properties and in vivo protective effects of the methanol extract of the Hypericum triquetrifolium Turra (HT) seed against acute hepatotoxicity, myelotoxicity and hematotoxicity in rats induced by cyclophosphamide (CP). In order to investigate in vivo protective effects of the HT extract on rat tissues, the rats were divided into nine groups. The toxic effects of CP and the protective effects of HT extract on nucleated cells that are produced by bone marrow, serum alanine transaminase (ALT), alkaline phosphatase (ALP), lactate dehydrogenase (LDH) and oxidative stress index (OSI) levels were investigated biochemically. Additionally, liver tissue samples were examined for histopathological changes and apoptosis by Bcl-2, Bax and caspase-3 immunohistochemistry. The results of this study show that HT seed methanol extract has high total phenolic content (179.52 μg GAE/mg) and antioxidant activity (87.48% in 500 μg/mL concentration). CP administration caused hepatotoxicity, myelotoxicity and hematotoxicity in the rats. Whereas, the groups of rats that were injected with different concentrations of HT (25, 50 and 100 mg/kg) and CP (150 mg/kg) showed significant protective effects on bone marrow nucleated cells and important decreases on serum ALT, ALP, LDH and OSI levels were observed when compared with the CP injected group.
Investigation of Uroprotective Effects of Seed Methanol Extracts of Hypericum Triquetrifolium Turra. on Cyclophosphamide-Induced Bladder Hemorrhagic Cystitis and Nephrotoxicity in Wistar Albino Rats
(Cukurova Univ, Fac Medicine, 2020) Yildiz, Songul Cetik; Keskin, Cumali; Sahinturk, Varol; Ayhanci, Adnan
Purpose: This study investigated the possible uroprotective effects of Hypericum triquetrifolium Turra. (HT) seed methanol extracts (25,50,100 mg/kg, i.p., for 6 days) against cyclophosphamide (CYP)-induced (150 mg/kg, single dose, i.p.) acute bladder hemorrhagic cystitis (HC) and nephrotoxicity in rats. Materials and Methods: Wistar albino rats used in this study were divided into nine groups, each including seven rats. Group 1 (control) was treated with 0.5ml saline (SF) and Group 2 was treated with CYP (150 mg/kg). Groups 3, 4, 5 were treated with 25, 50, 100 mg/kg HT, respectively while groups 6, 7, 8 were treated with 25, 50, 100 mg/kg CYP + HT, respectively. Finally, Group 9 (control-2) was treated with 0.5ml-%0.2 dimethyl sulfoxide (DMSO). The serum creatinine, blood urea nitrogen (BUN), superoxide dismutase (SOD) and catalase (CAT) levels were measured in blood serum. Results: The CYP-treated rats histopathologically had mild-moderate bladder and renal injuries. The serum creatinine and BUN levels, which are the biochemical markers of renal injury, significantly increased compared to the control group. Conclusion: HT showed a protective effect on CYPrelated bladder HC and nephrotoxicity in rats by inhibiting inflammation and apoptosis.
Protective Effect of Carvacrol Against Oxidative Stress and Heart Injury in Cyclophosphamide–Induced Cardiotoxicity in Rat
(2016) Cetik, Songul; Ayhanci, Adnan; Sahinturk, Varol
Possible protective effects of carvacrol (Car) against cyclophosphamide (CP)-induced cardiotoxicity was examined in this study. Experimental groups of the rats were randomly divided into 13 groups,each including seven animals: Group 1 (control) treated with saline; groups 2, 3, and 4 treated with 50, 100, or 150 mg/kg of CP, respectively; group 5 treated with 0.5 mL olive oil; groups 6 and 7 treated with 5.0 and 10 mg/kg of Car, respectively; groups 8, 9, or 10 treated with respective CP plus 5.0 mg/kg of Car; and groups 11, 12, or 13 treated with respective CP plus 10 mg/kg of Car. Serum alanine transaminase (ALT),aspartat transaminase (AST), lactate dehydrogenase (LDH), malondialdehyde (MDA),creatine kinase-MB (CK-MB), total oxidant state (TOS), oxidative stress index (OSI), and levels were high only in the CP groups. There was a dose-dependence on the CP-induced cardiotoxicity. Hemorrhage, inflammatory cell infiltration and the separation of the muscle fibers in the heart tissue supported the biochemical data. With 5.0 and 10 mg/kg Car, there was an important decrease in the CP toxicity and this was related to the oxidative and nitrosative stress in the CP-induced cardiotoxicity. Reduced inflammation and lipid peroxidation in the heart tissue and increase of serum glutathione (GSH) and total antioxidant capacity (TAS) levels were found when carvacrol was applied. Based on these findings, it could be proposed that Car was a strong candidate in preventing the CP-induced cardiotoxicity but further clinical studies should be done in order to verify its application on humans.
Protective Effect of Carvacrol Against Oxidative Stress and Heart Injury in Cyclophosphamide-Induced Cardiotoxicity in Rat
(INST TECNOLOGIA PARANA, 2015) Cetik, Songul; Ayhanci, Adnan; Sahinturk, Varol
Possible protective effects of carvacrol (Car) against cyclophosphamide (CP)-induced cardiotoxicity was examined in this study. Experimental groups of the rats were randomly divided into 13 groups, each including seven animals: Group 1 (control) treated with saline; groups 2, 3, and 4 treated with 50, 100, or 150 mg/kg of CP, respectively; group 5 treated with 0.5 mL olive oil; groups 6 and 7 treated with 5.0 and 10 mg/kg of Car, respectively; groups 8, 9, or 10 treated with respective CP plus 5.0 mg/kg of Car; and groups 11, 12, or 13 treated with respective CP plus 10 mg/kg of Car. Serum alanine transaminase (ALT), aspartat transaminase (AST), lactate dehydrogenase (LDH), malondialdehyde (MDA), creatine kinase-MB (CK-MB), total oxidant state (TOS), oxidative stress index (OSI), and levels were high only in the CP groups. There was a dose-dependence on the CP-induced cardiotoxicity. Hemorrhage, inflammatory cell infiltration and the separation of the muscle fibers in the heart tissue supported the biochemical data. With 5.0 and 10 mg/kg Car, there was an important decrease in the CP toxicity and this was related to the oxidative and nitrosative stress in the CP-induced cardiotoxicity. Reduced inflammation and lipid peroxidation in the heart tissue and increase of serum glutathione (GSH) and total antioxidant capacity (TAS) levels were found when carvacrol was applied. Based on these findings, it could be proposed that Car was a strong candidate in preventing the CP-induced cardiotoxicity but further clinical studies should be done in order to verify its application on humans.
Wistar Albino Sıçanlarında Hypericum Triquetrifolium Turra. Tohum Metanol Ekstraktlarının Siklofosfamid-nedenli Mesane Hemorajik Sistiti ve Nefrotoksisitesi Üzerine Üroprotektif Etkilerinin İncelenmesi
(2020) Ayhanci, Adnan; Yıldız, Songul Çetik; Sahinturk, Varol; Keskin, Cumali
Amaç: Bu çalışmada, Hypericum triquetrifolium Turra (HT) tohum metanol ekstraktlarının (25,50,100 mg/kg, i.p., 6 gün boyunca) siklofosfamid (CYP) nedenli (150 mg/kg, tek doz, i.p.) akut mesane hemorajik sistit (HC) ve nefrotoksisiteye karşı olası üroprotektif etkileri araştırıldı. Gereç ve Yöntem: Bu çalışmada kullanılan Wistar albino sıçanlar, her biri yedi sıçan olmak üzere dokuz gruba ayrıldı. Grup 1 (kontrol) 0.5ml salin (SF) ile muamele edildi ve Grup 2, CYP (150 mg/kg) ile muamele edildi. Grup 3, 4, 5 sırasıyla 25, 50, 100 mg/kg HT ile tedavi edilirken, grup 6, 7, 8 sırasıyla 25, 50, 100 mg/kg HT + CYP ile tedavi edildi. Son olarak, Grup 9 (kontrol-2) 0.5ml-% 0.2 dimetil sülfoksit (DMSO) ile muamele edildi. Kan serumunda serum kreatinin, kan üre azotu (BUN), süperoksit dismutaz (SOD) ve katalaz (CAT) seviyeleri ölçüldü. Bulgular: CYP ile tedavi edilen sıçanların histopatolojik olarak hafif-orta derecede mesane ve böbrek yaralanmaları vardı. Böbrek hasarının biyokimyasal belirteçleri olan serum kreatinin ve BUN düzeyleri, kontrol grubuna göre önemli ölçüde artmıştır. Sonuç: HT, enflamasyonu ve apoptozu inhibe ederek sıçanlarda CYP ile ilişkili mesane HC'si ve nefrotoksisite üzerinde koruyucu bir etki göstermiştir.