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Öğe Ameliorative Effects of Oleuropein on Lipopolysaccharide-Induced Acute Lung Injury Model in Rats(Springer/Plenum Publishers, 2021) Dikmen, Nursel; Cellat, Mustafa; Etyemez, Muhammed; Isler, Cafer Tayer; Uyar, Ahmet; Aydin, Tuba; Guvenc, MehmetAcute lung injury (ALI) is one of the most common causes of death in diseases with septic shock. Oleuropein, one of the important components of olive leaf, has antioxidant and anti-inflammatory effects. The objective of this study was to investigate the effects of oleuropein on lipopolysaccharide (LPS)-induced ALI in rats. Oleuropein was administered to rats at a dose of 200 mg/kg for 20 days and LPS was given through intratracheal administration to induce ALI. The study was terminated after 12 h. The results showed that in the group treated with oleuropein, inflammatory cytokines and oxidative stress decreased in serum, bronchoalveolar lavage fluid (BALF), and lung tissue, and there were significant improvements in the picture of acute interstitial pneumonia (AIP) caused by LPS in histopathological examination. Based on the findings of the present study, oleuropein showed protective effects against LPS-induced ALI.Öğe Bisphenol AF Caused Reproductive Toxicity in Rats and Cineole Co-Treatment Exhibited Protective Effect(Springer Heidelberg, 2024) Uyar, Ahmet; Cellat, Mustafa; Kanat, Ozgur; Etyemez, Muhammed; Kutlu, Tuncer; Deveci, Mehmet Zeki Yilmaz; Yavas, IlkerBisphenol AF (BPAF) is increasingly used and now found in products intended for human consumption. The protective effect of 1,8-cineole (CIN) against BPAF-induced reproductive toxicity was investigated. Four groups were created, with each group consisting of eight rats: control, BPAF (200 mg/kg), CIN (200 mg/kg), and BPAF + CIN groups. The results demonstrated that the BPAF group exhibited a decline in testosterone levels and a decrease in sperm parameters compared with the control. Additionally, higher levels of MDA were observed, along with lower levels of GSH and GPx activity. CAT activity also decreased slightly. Tnf-alpha, Nf-kappa B levels were significantly higher, and caspase-3 expression was elevated, while PCNA expression decreased. BPAF significantly increased tissue degeneration compared with the control. However, the BPAF + CIN group showed statistically significant improvements in sperm parameters, except for concentration. They also exhibited an increase in testosterone levels and an improvement in MDA and GSH levels compared with the BPAF group. However, GPx activity partially enhanced. Tnf-alpha and Nf-kappa B levels were significantly reduced, and caspase-3 levels declined while PCNA and Bcl-2 levels increased. The Johnsen Testicular Biopsy score showed a substantial increase. Overall, these results suggest that CIN co-treatment in rats enhanced reproductive health and exhibited antioxidant, antiapoptotic, and anti-inflammatory properties against BPAF-induced testicular damage.Öğe Carvacrol showed a curative effect on reproductive toxicity caused by Bisphenol AF via antioxidant, anti-inflammatory and anti-apoptotic properties(Pergamon-Elsevier Science Ltd, 2023) Uyar, Ahmet; Cellat, Mustafa; Kanat, Ozgur; Etyemez, Muhammed; Kutlu, Tuncer; Deveci, Mehmet Yilmaz Zeki; Yavas, IlkerBisphenol AF (BPAF) is an endocrine disruptor, and human exposure to these chemicals is growing in industrialized nations. BPAF has been demonstrated in studies to have toxic effects on reproductive health. This study examined the effects of oral exposure to BPAF on the reproductive system and the protective effects of carvacrol in rats. From 32 Wistar albino rats, four separate groups were set up for this purpose. Carvacrol 75 mg/kg and BPAF 200 mg/kg were administered by oral gavage method. Rat sperm parameters and serum testosterone levels were measured after 28 days of administration. The study looked at the MDA in the testis tissues, as well as CAT, GPx, and GSH as antioxidants parameters, NF-& kappa;B and TNF-& alpha; as inflammatory markers, caspase-3 and Bcl-2 as apoptosis parameters, and PCNA as cell proliferation markers. In addition, testis tissues underwent histological evaluation. As a result, in rats exposed to only BPAF, sperm counts declined, testosterone levels reduced, oxidative stress, inflammation, and apoptosis increased, and cell proliferation decreased. Furthermore, severe disruptions in tissue architecture and decreased spermatogenesis were reported. In contrast, sperm parameters improved, testosterone levels increased, oxidative stress and inflammation decreased, and apoptosis was prevented in the carvacrol-treated group compared to the BPAF-only group. It was also found that spermatogenesis was maintained, and structural abnormalities in testicular tissue were mostly avoided with an increase in PCNA expression. According to the findings, despite BPAF-induced testicular and reproductive toxicity, carvacrol had therapeutic potential due to its anti-inflammatory, antioxidant, cell proliferation-increasing, and anti-apoptotic activities.Öğe Changes in oxidative stress parameters in ear-tagged calves in acute period(Veteriner Kontrol Merkez Araştırma Enstitüsü, 2020) Cellat, Mustafa; Peker Akalın, Pınar; İşler, Cafer Tayer; Güvenç, Mehmet; Gökçek, İshak; Kazak, Filiz; Başpınar, NuriThis study aimed to investigate the effects of ear-tagging on blood malondialdehyde (MDA), reduced glutathione (rGSH), Vitamin C (Vit C) levels, and glutathione peroxidase (GPx) activity in the acute period. Ear-tagged (with polyurethane ear-tag) animals consisted of nine healthy Holstein calves (2-3 months old). Blood samples were taken just before ear-tagging (baseline), at the 20th min, on the 3rd day, and 8th day after the ear-tagging procedure. Six Holstein calves were involved the sham group. In ear-tagged animals, plasma MDA levels increased on the 3rd day compared to baseline values (p<0.01) and returned to baseline values on the 8th day, whereas no change was found in the sham group. In ear-tagged animals, plasma rGSH levels increased at the 20th min, 3rd day, and 8th day (p<0.001) in comparison to baseline values, which in the sham group, there was no change. In ear-tagged animals, erythrocyte rGSH levels on the 3rd and 8th days were higher compared to baseline and 20th min level (p<0.01). In the sham group, the 3rd and 8th day erythrocyte rGSH levels increased compared to baseline values (p<0.01). In ear-tagged animals, the 20th min, 3rd day, and 8th day erythrocyte GPx activities were lower than the baseline values (p<0.001), whereas in the sham group, no change was observed. While Vit C levels increased progressively in the sham group (p<0.05), this increase was not observed in the ear-tagged group. In conclusion, ear-tagging was found to cause oxidative stress and increase antioxidant requirement in calves.Öğe Effect of exogenous Melatonin administration on Spermatogenesis in chronic unpredictable stress rat model(Univ Zulia, Facultad Ciencias Veterinarias, 2023) Gokcek, Ishak; Aydin, Leyla; Cellat, Mustafa; Yavas, Ilker; Kutlu, TuncerThis study investigated the hormonal, inflammatory, oxidant-antioxidant, and histopathological effects of exogenous Melatonin administration on Spermatogenesis in rats' chronic unpredictable stress model (CUSM). In the study, stress caused a decrease in follicle stimulating-hormone (FSH), luteinizing hormone (LH), Testosterone, Melatonin, Glutathione (GSH), Glutathione peroxidase (GSH-Px), catalase, interleukin 10 (IL-10) levels and motility, and an increase in Corticosterone, nuclear factor kappa beta (NF-kB), tumor necrosis factor-alpha (TNF-alpha), interleukin 1 beta (IL-1 beta), interleukin 6 (IL-6), abnormal sperm, dead/live sperm ratio and exogenous Melatonin reduced inflammatory cytokines and oxidative stress and improved spermatological parameters (P<0.05). Melatonin also partially corrected stress-induced changes in testicular morphology. As a result, using Melatonin in rats with CUSM may be effective in improving spermatological parameters through anti-inflammatory and antioxidant mechanisms.Öğe Effect of Exogenous Melatonin Chronic Unpredictable Stress Model on Spermatogenesis in Rats(Wiley, 2022) Gokcek, Ishak; Aydin, Leyla; Cellat, Mustafa; Yavas, Ilker[Abstract Not Available]Öğe The effect of tyrosol on diclofenac sodium-induced acute nephrotoxicity in rats(Wiley, 2024) Comez, Mehmet; Cellat, Mustafa; Kuzu, Muesluem; Uyar, Ahmet; Turk, Erdinc; Kaya, Yusuf Selim; Etyemez, MuhammedAlthough diclofenac (DCF) is a nonsteroidal anti-inflammatory drug that is considered safe, its chronic use and overdose may show some toxic effects. The protective effect of tyrosol (Tyr) pretreatment against DCF-induced renal damage was investigated in this study. The 32 rats used in the study were randomly divided into four groups of eight rats each. According to the data obtained, it was determined that creatinine, urea, and blood urea nitrogen (BUN) levels increased in serum samples of the DCF group. Besides, the levels of reduced glutathione (GSH) and glutathione peroxidase (GPx) activity decreased and the malondialdehyde (MDA) level increased in the kidney tissue. However, no change was observed in catalase (CAT) activity. Cyclooxygenase-2 (COX-2), nuclear factor kappa B (NF-kappa B), and tumor necrosis factor-alpha (Tnf-alpha) levels increased and nuclear factor erythroid 2-related factor 2 (Nrf-2) levels decreased. No change was detected in the level of interleukin 1 beta (IL-1 beta). When the DCF+Tyr group and the DCF group were compared, it was assessed that Tyr had a curative effect on all biochemical parameters. Also, kidney damages, such as degeneration and necrosis of tubular epithelium and congestion of veins, were obviated by treatment with tyrosol in histopathological examinations. It was determined that Tyr pretreatment provided a protective effect against nephrotoxicity induced by DCF with its anti-inflammatory and antioxidant properties.Öğe The effect of vitamin E administration to dairy cows in the prepartum period on some metabolic, oxidative, and reproductive parameters(Sivar-Soc Italiana Veterinari Animali Reddito, 2022) Yenilmez, Kudret; Atalay, Hasan; Cellat, Mustafa; Etyemez, Muhammed; Atmaca, Gizem; Gursel, Feraye EsenThe purpose of this study was to investigate how vitamin E affected oxidative stress, metabolic biomarkers, and reproductive parameters in cows during late gestation. The study used forty healthy, multiparous cows in late gestation. The animals were divided into two groups, control (n.20) and experimental (n:20) group, ten (+/- 5) days before birth. On the same day, 10 ml of blood sample was drawn from each animal's tail vein, and the cows in the experimental group received 3000 mg of vitamin E (DL-alpha-tocopherol acetate) intramuscularly, whereas the cows in the control group received 20 ml of 0.9% NaCl. On calving day and on the 15th day after the calving, blood samples were taken again. The serums of the blood samples taken were separated and stored at -80 C until the analysis. Malondialdehyde (MDA), Glutathione Peroxidase (GSH-Px), Catalase (CAT), Glutathione (GSH), Glucose (GLU), Triglyceride ( TG), Cortisol (COR), Glutamic Oxaloacetic Transaminase (GOT), Gamma Glutamyl Transferase (GGT) and Glutamic Pyruvic Transaminase (GPT) in the samples were measured. Calving - first estrus, calving - first insemination, calving-conception, and artificial insemination per pregnancy were recorded to determine the reproductive performance of the cows involved in the study. Vitamin E administration to cows during the peripartum period was found to boost GSH and GSH-Px levels at birth while decreasing GPT levels (p<0.05). Furthermore, the period of calving-first estrus, calving-first insemination, and calving-conception was shortened compared to the control group, however this was not statistically significant (p>0.05). Vitamin E was proven to be useful in lowering birth stress and protecting the liver when given to cows in late gestational stages. It is thought that it may also be effective in improving reproductive parameters, but the study should be replicated with more animals.Öğe Effects of Dexamethasone on Bupivacaine-Induced Peripheral Nerve Injection Injury in the Rat Sciatic Model(Taylor & Francis Inc, 2021) Comez, Mehmet Selim; Borazan, Yakup; Ozgur, Tumay; Isler, Cafer Tayer; Cellat, Mustafa; Guvenc, Mehmet; Altug, Muhammed EnesIntroduction The aim of this study was to investigate the effect of perineural dexamethasone against intraneural bupivacaine. Material and Methods Rats were divided into 9 groups with 6 animals in each group; Group 1 (Intraneural saline 600 mu L-2ndday), Group 2 (Intraneural saline 600 mu L-7th day), Group 3 (Intraneural saline 600 mu L + perineural dexamethasone 0.5 mg/kg-2nd day), Group 4 (Intraneural saline 600 mu L + perineural dexamethasone 0.5 mg/kg-7th day), Group 5 (Intraneural bupivacaine 10 mg/kg-2nd day), Group 6 (Intranueral bupivacaine 10 mg/kg-7th day), Group 7 (Intraneural bupivacaine 10 mg/kg + perineurald exam ethasone 0.5 mg/kg-2nd day), Group 8 (Intraneural bupivacaine 10 mg/kg + perineural dexamethasone 0.5 mg/kg-7th day), Group 9 (Control group). At the end of the application period, histopathological and immunohistochemical examinations were analyzed. Results and Conclusion It was observed that caspase 3 levels significantly increased in the 5th and 6th groups compared to the 1st and 2nd groups (p < 0.01). However, in the 7th and 8th groups, these levels were similar with 1st and 2nd groups. While a significant decrease in S 100 levels was detected in group 6 (p < 0.05), a significant increase occurred in Group 8 and reached the same levels as Group 2. According to histopathological evaluation, edema, vacuolization and myelin degeneration were significantly increased in groups 5 and 6 (p < 0.05). However, in the 8th group, the mentioned data showed a significant decrease and reached the same levels as group 2. As a result, perineural dexamethasone was found to have protective effects against intraneural bupivacaine induced sciatic nerve damage.Öğe Effects of thymol and carvacrol on sperm quality and oxidant/antioxidant balance in rats(Taylor & Francis Ltd, 2019) Guvenc, Mehmet; Cellat, Mustafa; Gokcek, Ishak; Yavas, Ilker; Ozsoy, Yule YurdagulIn this study, we have investigated the effects of different doses of thymol (T) and carvacrol (C) on sperm quality oxidative stress and antioxidant system. For this purpose, 49 rats were divided into seven groups (7 rats in each group): 1st Group (control); 2nd Group T-10 (thymol 10?mg/kg), 3rd Group T-20 (thymol 20?mg/kg), 4th Group C-10 (carvacrol 10?mg/kg), 5th Group C-20 (carvacrol 20?mg/kg), 6th Group T?+?C-10 (thymol 10?mg/kg?+?carvacrol 10?mg/kg) and 7th Group T?+?C-20 (thymol 20?mg/kg?+?carvacrol 20?mg/kg). The duration of the experiment was 10?weeks for all animals. During the study, sperm quality parameters (motility, concentration, abnormal spermatozoa and live?dead sperm ratio), biochemical parameters [malondialdehyde (MDA), reduced glutathione(GSH), glutathione peroxidase (GSH-Px), catalase (CAT), AST, ALT, GGT, urea and creatinine] were analysed, and histopathological examination was performed. The study results showed that monotherapies of thymol and carvacrol significantly decreased MDA levels in testicles, liver and kidney tissues compared to the control group (p?Öğe Inula viscosa ameliorates acetic acid induced ulcerative colitis in rats(Taylor & Francis Ltd, 2023) Cellat, Mustafa; Tekeli, Ibrahim Ozan; Turk, Erdinc; Aydin, Tuba; Uyar, Ahmet; Isler, Cafer Tayer; Gokcek, IshakIncreased pro-inflammatory cytokines and oxidative stress contribute to the pathophysiology of ulcerative colitis (UC). Inula viscosa is a plant with antioxidant and anti-inflammatory properties. We investigated the effect of an ethanolic extract of I. viscosa on an experimental UC model created using acetic acid. Rats were divided into four groups of eight: group 1, control; group 2, 3% acetic acid group; group 3, 100 mg/kg sulfasalazine + 3% acetic acid group; group 4, 400 mg/kg I. viscosa + 3% acetic acid. I. viscosa and sulfasalazine were administered by oral gavage and 3% acetic acid was administered per rectum. We found that I. viscosa treatment decreased colon malondialdehyde, tumor necrosis factor-alpha, interleukin-1 beta and nuclear factor kappa B levels; it increased reduced glutathione, nuclear factor erythroid 2-related factor 2, heme oxygenase-1 and kelch-like ECH-associated protein 1 levels and glutathione peroxidase enzyme activity. Group 1 colon exhibited normal histological structure. Slight inflammatory cell infiltration and edema and insignificant slight erosion in crypts were detected in colon tissues of group 4. We found that I. viscosa reduced oxidative stress and inflammation, which was protective against UC by inducing the Nrf-2/Keap-1/HO-1 pathway in the colon.Öğe Investigation of the effects of safranal on the experimentally created rheumatoid arthritis model in rats(Wiley, 2022) Cellat, Mustafa; Isler, Cafer T.; Kutlu, Tuncer; Kuzu, Muslum; Etyemez, Muhammed; Alakus, Halil; Guvenc, MehmetRheumatoid arthritis (RA) is a systemic chronic disease characterized by inflammation and synovitis. More effective treatment methods with less side effects need to be developed. In this context, current study investigated the therapeutic effects of safranal in a model of complete Freund's adjuvant (CFA)-induced RA. The control group was given 1 ml of saline orally starting from the 8th day, and 0.2 ml of CFA was given to the RA, RA + Safranal and RA + Methotrexate (MTX) groups on the 0th day of the experiment. Starting from the 8th day of the experiment, 1 ml of saline was given to the RA group, safranal was given at 200 mg/kg of body weight to the RA + MTX group, and 3 mg/kg of MTX to the RA + MTX group twice a week. The results showed that weight gain decreased in the RA group compared to the control group while arthritis index score, thymus index, and planter temperature were found to be increased. Additionally, a deterioration in blood parameters, an increase in alanine aminotransferase, aspartate aminotransferase, urea, creatinine, C-reactive protein, and malondialdehyde levels, and a decrease in reduced glutathione levels and glutathione peroxidase and catalase (CAT) activities were seen while tumor necrosis factor-alpha, interleukin-6 (IL-6), cyclooxygenase-2, nuclear factor kappa B levels were found to be increased. However, the safranal had a regulatory effect on all the values, except IL-6 and CAT, and blood parameters. Moreover, histopathological examination revealed that safranal reduced inflammatory cell infiltration and edema.Öğe Investigation of the efficacy of tyrosol on doxorubicin-induced acute cardiotoxicity in rats(2022) Cellat, Mustafa; Etyemez, MuhammedAim: In this study, it was aimed to investigate the efficacy of tyrosol on cardiotoxicity induced by doxorubicin. Materials and Methods: Rats were divided into 4 groups and each group included 8 rats. Groups 1 and 2 were given 1 ml of physiological saline, while groups 3 and 4 were given 20 mg/kg of tyrosol. In saline and tyrosol administrations, the oral gavage method was used. In addition, a single dose of 15 mg/kg dose of doxorubicin was administered intraperitoneally to group 2 and group 4 on the 12th day of the trial. On the 14th day of the experiment, serum and tissue samples were taken from the anesthetized rats and then euthanized. Serum creatine kinase MB and creatine kinase activities were analyzed. Heart tissues were extracted, and histological and oxidative stress characteristics were measured in these tissues. Heart tissue malondialdehyde and reduced glutathione levels, catalase and glutathione peroxidase activities were assessed spectrophotometrically. Results: Tyrosol pretreatment inhibited doxorubicin-induced increase in heart tissue malondialdehyde level (p<0.05), the decrease in reduced glutathione level and glutathione peroxidase enzyme activity, and suppressed doxorubicin-induced oxidative stress in the heart tissue. In terms of cardiac tissue catalase enzyme activity, no differences were found between the groups. Because of the reduction in oxidative damage in the heart, the serum creatine kinase MB and creatine kinase activity decreased dramatically (p<0.05). Furthermore, it was discovered that tyrosol pretreatment reduced the histopathological lesions caused by doxorubicin in cardiac tissue. Conclusion: It is thought that the administration of tyrosol may reduce the cardiotoxicity caused by doxorubicin.Öğe Nobiletin attenuates acetaminophen-induced hepatorenal toxicity in rats(Wiley, 2020) Guvenc, Mehmet; Cellat, Mustafa; Gokcek, Ishak; Ozkan, Huseyin; Arkali, Gozde; Yakan, Akin; Ozsoy, Sule YurdagulThe study aimed to examine the effects of nobiletin on the toxicity model induced with acetaminophen (APAP). For this purpose, 24 adult male rats were equally divided into four groups. The groups were the control group (group 1); dimethyl sulfoxide only, the APAP group (group 2) received a single dose of APAP 1000 mg/kg on the 10th day of experiment; the Nobiletin group (group 3), nobiletin (10 mg/kg) for 10 days; and the APAP + Nobiletin group (group 4), nobiletin (10 mg/kg) for 10 days with a single dose of APAP (1000 mg/kg) administered on the 10th day and the experiment ended after 48 hours. At the end of the study, a significant increase in malondialdehyde, interleukin-1 beta (IL-1 beta), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-alpha) levels and a significant decrease in glutathione levels, glutathione peroxidase activities and nuclear factor erythroid-derived 2-like 2 (Nrf-2) and heme oxygenase-1 (HO-1) expressions were observed with APAP application in liver and kidney tissues. Serum aspartate transaminase (AST), alanine transaminase (ALT), urea, and creatinine levels were also significantly increased in the APAP group. However, nobiletin treatment in group 4 reversed oxidative stress and inflammatory and histopathological signs caused by APAP. It is concluded that nobiletin may be a beneficial substance that confers hepatorenal protection to APAP-induced toxicity via antioxidant and anti-inflammatory mechanisms.Öğe Nobiletin Protects from Renal Ischemia-Reperfusion Injury in Rats by Suppressing Inflammatory Cytokines and Regulating iNOS-eNOS Expressions(Springer/Plenum Publishers, 2020) Guvenc, Mehmet; Cellat, Mustafa; Uyar, Ahmet; Ozkan, Hueseyin; Gokcek, Ishak; Isler, Cafer Tayer; Yakan, AkinIschemia-reperfusion injury is an organ failure caused by hypoxia and reperfusion, which is closely associated with oxidative stress and inflammation. In this study, we investigated whether nobiletin had protective effects on inflammatory parameters, oxidative damage, iNOS-eNOS expressions, and histopathological structure of renal tissue in rats with renal ischemia-reperfusion injury. For this purpose, 24 rats were divided into 4 groups: group 1 (Control), group 2 (Ischemia-Reperfusion-IR), group 3 (Nobiletin-10 mg/kg p.o.), group 4 (Nobiletin + IR). The study was continued for 7 days. At the end of the study, urea (p < 0.05), creatine (p < 0.05), MDA (p < 0.001), TNF-alpha (p < 0.001), IL-1 beta (p < 0.05), and IL-6 (p < 0.001) levels increased in the IR group; however, a significant decrease occurred in group 4 (Nobiletin + IR) and it reached the control group levels. In the IR group, GSH (p < 0.01) levels, and GSH.Px (p < 0.01) and CAT (p < 0.05) activities decreased whereas they increased significantly in group 4 (Nobiletin + IR) and reached the same levels as the control group. In histopathological analyses, destruction and increased iNOS-eNOS expressions in the IR group showed a significant decrease in group 4 (Nobiletin + IR). As a result, the application of nobiletin has shown that it has protective effects by reducing kidney damage caused by IR injury.Öğe The protective effect of esculetin against aluminium chloride-induced reproductive toxicity in rats(Wiley, 2021) Turk, Erdinc; Ozan Tekeli, Ibrahim; Ozkan, Huseyin; Uyar, Ahmet; Cellat, Mustafa; Kuzu, Muslum; Yavas, IlkerOne of the prominent health problems caused by Aluminium was the decrease in male fertility rates. In the study, the protective effect of Esculetin (ESC) against the reproductive toxicity induced by Aluminium chloride (AlCl3) was investigated. For this purpose, AlCl3 was administrated to Wistar Albino rats at a dose of 34 mg/kg and ESC was administrated at a dose of 50 mg/kg for 70 days. It was determined that AlCl3 treatment reduced sperm motility and concentration, increased dead/live rate and abnormal sperm rate. It decreased serum testosterone level, and co-treatment of ESC significantly regulated these values. In the AlCl3-treated group, MDA level increased and GSH level, GPx and CAT activities decreased compared with those of the control group. However, co-treatment of ESC showed an amelioratory effect on the values except for CAT activity. It was observed that the expression level of NRF-2 increased in the ESC and AlCl3 + ESC groups, and NF-kappa B increased in the AlCl3 group with the control group. It was determined that Caspase-3 expression decreased, and Bcl-2 expression increased in AlCl3 + ESC group compared to AlCl3 group. It was also determined that AlCl3-induced tissue injury was significantly prevented by ESC co-treatment.Öğe Protective effect of oleuropein on ketamine-induced cardiotoxicity in rats(Springer, 2020) Comez, Mehmet Selim; Cellat, Mustafa; Ozkan, Huseyin; Borazan, Yakup; Aydin, Tuba; Gokcek, Ishak; Turk, ErdincThe antioxidant and cardioprotective effects of oleuropein have been reported in several studies; however, its effect on ketamine cardiotoxicity has not been known yet. The aim of this study was to investigate the effects of oleuropein in ketamine-induced cardiotoxicity model in rats. A total of 28 male Wistar Albino rats were included in the study and they were randomly divided into four groups, each having seven rats. Group 1 (control): rats were given 1 mL of DMSO by oral gavage method for 7 days. Group 2 (ketamine): on the seventh day of the study, 60 mg/kg ketamine was administered intraperitoneally. Then, 60 mg/kg ketamine was administered intraperitoneally every 10 min for 3 h. Group 3 (oleuropein): rats were given 200 mg/kg/day oleuropein by oral gavage method for 7 days. Group 4 (oleuropein + ketamine): rats were given 1 x 200 mg/kg oleuropein by oral gavage method for 7 days. Furthermore, 60 mg/kg ketamine was administered intraperitoneally on the seventh day of the experiment. Then, 60 mg/kg ketamine was administered intraperitoneally every 10 min for 3 h. Serum cardiac marker (TnI, CK-MB and CK) levels were measured. Histopathological analysis was performed on a portion of the cardiac tissue. Cardiac tissue oxidative stress and antioxidant markers (MDA, GSH, GSH.Px and CAT), TNF-alpha, IL-6, NF-kappa B, COX-2 and Nrf-2 gene expressions, and protein conversion levels of related genes were determined. Data obtained showed that ketamine administration increased MDA (p < 0.001), TNF-alpha (p < 0.01), IL-6 (p < 0.01), COX-2 (p < 0.001) and NF-kappa B (p < 0.001) levels, as well as serum TnI (p < 0.001), CK-MB (p < 0.001) and CK (p < 0.01) levels whereas decreased GSH (p < 0.05) and Nrf-2 (p < 0.05) levels, as well as GSH-Px (p < 0.001) and CAT (p < 0.05) enzyme activities. Oleuropein administration was observed to decrease MDA, TNF-alpha, IL-6, COX-2, NF-kappa B, TnI, CK-MB and CK levels close to the control group and to increase GSH levels and GSH-Px and CAT enzyme activities close to the control group. This study showed that oleuropein administration reversed the increased oxidative stress and inflammation as a result of the use of ketamine and had protective effects on the heart.Öğe Protective effect of Smilax excelsa L. pretreatment via antioxidant, anti-inflammatory effects, and activation of Nrf-2/HO-1 pathway in testicular torsion model(Wiley, 2022) Cellat, Mustafa; Isler, Cafer Tayer; Uyar, Ahmet; Kuzu, Muslum; Aydin, Tuba; Etyemez, Muhammed; Turk, ErdincThe protective effects of the ethanol extract of Smilax excelsa L. (SE) leaves were investigated on testicular tissue of rats with a torsion model in this study. The chemical composition of the extract was detected by means of liquid chromatography with tandem mass spectrometry (LC-MS/MS). SE extract was given for 21 days before torsion was created in the treatment group. The sperm parameters of the torsion group were impaired, and there was an increase in MDA level as well as a decrease in GSH level and GPx activity compared to the control group. TNF-alpha and NF-kappa B levels in the torsion group increased as compared to those in the control group. The expression levels of Nrf-2 and HO-1 were lower in the torsion group than those in the control group. The SE pretreatment group has improved sperm, oxidative stress, and inflammatory markers when compared to the torsion group, and the Nrf-2/HO-1 pathway was activated. Practical applications Smilax excelsa L. is a plant with economic value used in traditional medicine in the treatment of stomachache, bloating, and breast cancer in Northwest Anatolia. It has an antioxidant effect due to the flavonoids and anthocyanins it contains. The protective effect against ischemia-reperfusion-induced tissue and reproductive damage in testicular tissue were demonstrated with the study. When the histological examinations of the tissues were evaluated, it was found that morphological structure of the tissues was retained in the treatment group. The findings indicate that SE prevents tissue damage in the torsion model by antioxidant and anti-inflammatory effects and activating Nrf-2/HO-1 pathway.Öğe Protective Effects of Tyrosol Against DSS-Induced Ulcerative Colitis in Rats(Springer/Plenum Publishers, 2019) Guvenc, Mehmet; Cellat, Mustafa; Ozkan, Huseyin; Tekeli, Ibrahim Ozan; Uyar, Ahmet; Gokcek, Ishak; Isler, Cafer TayerIn this study, the effects of tyrosol were investigated in DSS-induced experimental ulcerative colitis model. For this purpose, rats were divided into five groups of seven rats in each: control group, colitis group (DSS-4%), tyrosol group (tyrosol 20 mg/kg), sulfasalazine (sulfasalazine+DSS 100 mg/kg), and treatment group (tyrosol+DSS 20 mg/kg). In the study, the active substances were administered to all animals for a period of 21 days. At the end of the study, malondialdehyde (MDA) levels increased (p < 0.001); GSH level (p < 0.05) along with GSH.Px (p < 0.01) and CAT (p < 0.001) activities decreased in the DSS-induced colitis group. However, with the administration of tyrosol, MDA and GSH levels along with GSH.Px and CAT activities came to the same levels as the control group. In the colitis group, an increase occurred in IL-6, COX-2, and NF-kappa B parameters, which created a significant difference compared to the control group (p < 0.001). Similarly, TNF-alpha levels also significantly increased with the administration of DSS (p < 0.05) which created a significant difference compared to the control group, while there was no difference among the other groups. As for the Nrf-2 data, it decreased with the administration of DSS which created a significant difference compared to the control group (p < 0.05), while there was no difference in other groups. In the colitis-induced group, IL-6, COX-2, and NF-kappa B gene expression levels also similarly increased but returned to the normal levels with the administration of tyrosol. In the histopathological scoring, the negativity that increased with the administration of DSS returned to the normal levels with the administration of tyrosol+DSS. In conclusion, according to the data obtained, tyrosol fixed the destruction picture in the DSS-induced colitis model, giving rise to thought that it has a protective effect.Öğe Protective Effects of Tyrosol Against DSS-Induced Ulcerative Colitis in Rats (vol 42, pg 1680, 2019)(Springer/Plenum Publishers, 2019) Guvenc, Mehmet; Cellat, Mustafa; Ozkan, Huseyin; Tekeli, Ibrahim Ozan; Uyar, Ahmet; Gokcek, Ishak; Isler, Cafer Tayer[Abstract Not Available]
