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Öğe The effect of angiotensin II type 2 receptor agonist treatment on doxorubicin induced heart failure(Oxford Univ Press, 2016) Ermis, N.; Ozhan, O.; Ulutas, Z.; Vardi, N.; Colak, C.; Parlakpinar, H.[Abstract Not Available]Öğe Effects of agomelatine on rat liver regeneration following partial hepatectomy(Taylor & Francis Ltd, 2023) Kose, A.; Ozhan, O.; Parlakpinar, H.; Vardi, N.; Yildiz, A.; Turkoz, Y.; Erdemli, Z.Primary or metastatic hepatic malignancies are common. Partial hepatectomy (PH) is the primary treatment for both benign and malignant hepatic neoplasms; it also is used for living donor liver transplantation. The regenerative potential of the liver after PH is 70-80% in humans. We investigated the protective and therapeutic effects of agomelatine (AGM) on rat liver regeneration following PH. We used 32 rats distributed equally into four groups: group 1, sham control; group 2, PH group; group 3, administered 20 mg/kg AGM orally once/day for 7 days following PH; group 4, administered 20 mg/kg AGM orally once/day 3 days before and 7 days following PH for 10 days. Liver samples were analyzed for antioxidants and free radicals. Tissue samples were processed and stained with hematoxylin and eosin to assess histopathological status and stained immunohistochemically for Ki-67. We found that PH reduced antioxidant enzymes and increased tissue reactive oxygen species, whereas AGM treatment had the opposite effect on these parameters. Our biochemical and histopathological findings were consistent. PH caused sinusoid congestion and dilation. Intensity of Ki-67 immunostaining of hepatocytes was increased in group 2, whereas these were reduced in group 4. Intensity of Ki-67 immunostaining of hepatocytes was increased in group 2, whereas it was reduced in the group 4 compared to group 1. We found that AGM was hepatoprotective following PH due to its antioxidant and free radical scavenger properties.Öğe Effects of molsidomine on retinal ischemia/reperfusion injury in rabbits(Taylor & Francis Ltd, 2018) Polat, N.; Ozer, M. A.; Parlakpinar, H.; Vardi, N.; Aksungur, Z.; Ozhan, O.; Yildiz, A.We investigated the effect of molsidomine (MOL) on ischemia/reperfusion (I/R) injury. Rabbits were assigned to four groups: group 1, sham; group 2, I/R; group 3, MOL treatment for 4days after I/R; group 4, MOL treatment for 1 day before I/R and 3days after I/R. Retinal I/R was produced by elevating the intraocular pressure to 150mm Hg for 60min. Seven days after I/R, the eyes were enucleated. Retinal changes were examined using histochemistry. The levels of malondialdehyde (MDA), glutathione (GSH), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT) also were measured. We found a significant increase in the thickness of the outer nuclear layer of group 3 compared to the other groups. In groups 3 and 4, caspase-3 stained cells in the ganglion cell layer were decreased compared to group 2. We found a significant increase in caspase-3 stained cells in the inner nuclear layer (INL) of group 2 compared to the other groups. We found a significant increase in caspase-3 stained cells in group 3 compared to group 4 in the INL. The MDA level in group 2 was significantly higher than group 1 and MOL significantly decreased MDA levels in groups 3 and 4. We found that MOL protected the retina from I/R injury by enhancing antioxidative effects and inhibiting apoptosis of retinal cells.Öğe Phenolic Compounds and Antimicrobial Activity of Inula sarana Boiss(Georg Thieme Verlag Kg, 2013) Ozhan, O.; Gokbulut, A.; Gunal, S.; Sarer, E.[Abstract Not Available]Öğe Protective and therapeutic effects of molsidomine on radiation induced neural injury in rats(Taylor & Francis Inc, 2017) Durak, M. A.; Parlakpinar, H.; Polat, A.; Vardi, N.; Ekici, K.; Ucar, M.; Ozhan, O.We investigated the protective and therapeutic effects of molsidomine (MOL) in a rat model of whole brain radiotherapy (RT). Forty female rats were divided into five groups of eight: group 1, control; group 2, 15 Gy single dose RT (RT); group 3, 4 mg/kg MOL treated for 5 days (MOL); group 4, 4 mg/kg MOL for 5 days, 10 days after RT treatment (RT + MOL); group 5, 4 mg/kg MOL treatment for 5 days before RT treatment and for 5 days after RT treatment (MOL + RT). All rats were sacrificed on day 16. Neurodegenerative changes in the brain and tissue levels of oxidants and antioxidants were evaluated. The oxidative parameters were increased and antioxidant status was decreased in group RT compared to groups MOL + RT and RT + MOL. Histopathological examination showed that treatment with MOL after RT application and treatment with MOL before RT treatment decreased neuronal degeneration. No difference in neuronal appearance was found between groups RT + MOL and MOL + RT. MOL treatment protected the nervous system of rats and may be a treatment option for preventing RT induced neural injury.Öğe Protective effect of short-term thymoquinone administration on the central nervous system in cisplatin-induced neurotoxicity(Verduci Publisher, 2022) Durak, M. A.; Ozhan, O.; Yildiz, A.; Durhan, M.; Vardi, N.; Cigremis, Y.; Parlakpinar, H.OBJECTIVE: This study was performed to investigate the potential benefi- cial effects of thymoquinone (TQ) on brain tis-sue based on biochemical and histopathologi-cal analyses in cisplatin (CIS) treated rats with central nervous system (CNS) neurotoxicity. MATERIALS AND METHODS: The rats were randomly divided into 4 groups with 8 rats in each group (n:8). Group 1: (Control), saline was administered for 3 days at a volume of 0.5 ml per day intraperitoneal (i.p.). Group 2: (CIS Group), one dose of CIS was administered (7 mg/kg i.p.). Group 3: (TQ Group), TQ was giv-en at a dose of 5 mg/kg per day for 3 days (i.p.). Group 4: (CIS+TQ Group), one dose of 7 mg/ kg was initiated half an hour before adminis-tration of CIS and one dose of 5 mg/kg per day was administered TQ i.p. for 3 days. RESULTS: Malondialdehyde levels were found to be statistically significantly higher in the CIS group compared to the control group. Degenerative changes observed in the CIS+TQ group were found to be milder than in the CIS group. In the CIS+TQ group, a statistically sig-nificant decrease in the severity of caspase-3 immunoreactivity was found when compared to the CIS group. It was found that the sever-ity of neurofilament immunoreactivity moni- tored in neuronal extensions was similar in all groups. In the CIS+TQ group, the severity of tau protein's immunoreactivity was similar to that of the CIS-group.CONCLUSIONS: According to the results obtained in our study, beneficial effects were obtained in reducing neurotoxicity with short-term TQ application in rats treated with CIS treatment.Öğe Therapeutic effects of cinnamon bark oil on sciatic nerve injury in rats(Verduci Publisher, 2023) Ozhan, O.; Izci, S. F.; Huz, M.; Colak, M.; Kucukakcali, Z.; Parlakpinar, H.- OBJECTIVE: The aim of this study was to investigate the effects of cinnamon bark essential oil (CBO) on analgesia, motor activity, balance, and coordination in rats with sciatic nerve damage. MATERIALS AND METHODS: Rats were divided into three groups as simply randomized. The right sciatic nerve (RSN) of the Sham group was explored. Only vehicle solution was applied for 28 days. The RSN of the sciatic nerve injury (SNI) group was explored. Damage was created by unilateral clamping, and vehicle solution was applied for 28 days. The RSN of the sciatic nerve injury+cinnamon bark essential oil (SNI+CBO) group was explored. SNI was created by unilateral clamping and CBO was applied for 28 days. In the experiment study, motor activity, balance, and coordination measurements were made with rotarod and accelerod tests. A hot plate test was performed for analgesia measurements. Histopathology studies were carried out with the sciatic nerve tissues.RESULTS: In the rotarod test, there was a statistically significant difference between the SNI group and the SNI+CBO group (p<0.05). According to the accelerod test findings, there was a statistically significant difference between the SNI group with the Sham and SNI+CBO groups. In the hot plate test, there was a statistically significant difference between the SNI group with the Sham and SNI+CBO groups (p<0.05). In comparison to the Sham group and the SNI group, the SNI+CBO group was shown to have the greatest expression level of vimentin.CONCLUSIONS: We have concluded that CBO can be used as an adjuvant treatment in cases of SNI, increased pain, nociception, impaired balance, motor activity, and coordination. Our results will be supported by further studies.
