2017-01-01, DOGAN, Z, ELBE, H, Taslidere, ELİF, SOYSAL, H, CETIN, A, DEMIRTAS, S, TAŞLIDERE, ELİF

2018-01-01, YILDIZ, A, VARDI, N, KARAASLAN, MG, ATES, B, TASLIDERE, ELİF, Esrefoglu, MUKADDES, TAŞLIDERE, ELİF, EŞREFOĞLU, MUKADDES

2017-10-01, Esrefoglu, MUKADDES, Taslidere, ELİF, Cetin, Asli, EŞREFOĞLU, MUKADDES, TAŞLIDERE, ELİF

Epithelial components of the organs of the digestive system are derived from the endoderm, whereas connective tissue and muscle components are derived from the mesoderm. At the 3rd-4th week of development, as a result of cephalocaudal and lateral foldings of the embryo, a portion of the endoderm-lined yolk sac cavity is incorporated in the embryo to form the primitive gut. Primitive gut is composed of four main regions: pharyngeal gut, foregut, midgut, and hindgut. The esophagus and stomach are derived from the foregut. The development of the esophagus is characterized by lengthening, widening, thickening, and histological changes. The development of the stomach is characterized by widening, thickening, and histological changes as well as positional changes. In the present study, we tried to review the morphological and functional development of the esophagus and stomach with the aid of pictures obtained from various stages of prenatal and postnatal development of the organs of rats. Previous reviews lack information on both histological and functional development of the organs.

2017-01-01, ESREFOGLU, MUKADDES, ÇETİN, AYMELEK, TASLIDERE, ELİF, Elbe, H., ATEŞ, BURHAN, Tok, OLGU ENİS, AYDIN, M. S., EŞREFOĞLU, MUKADDES, TAŞLIDERE, ELİF, TOK, OLGU ENİS

BACKGROUND: Non-alcoholic steatohepatitis, a cause of cirrhosis, is characterized by fatty infiltration of the liver, inflammation, hepatocellular damage and fibrosis. The aim of the present study was to investigate the effects of melatonin and quercetin on CCl4-induced steatosis characterized by fatty infiltration of the liver, inflammation, hepatocellular damage and fibrosis.

2018-01-01T00:00:00Z, taslidere, elif, VARDI, NİGAR, PARLAKPINAR, HAKAN, YILDIZ, AHMET, Taslidere, BAHADIR, Karaaslan, M. G., TAŞLIDERE, ELİF, TAŞLIDERE, BAHADIR

We evaluated the effects of melatonin on acetylsalicylic acid (ASA) induced gastroduodenal and jejunal mucosal injury. We used 40 postpubertal rats divided randomly into five groups of eight animals. The control group consisted of untreated animals. The Mel group was injected intraperitoneally (i.p.) with 5mg/kg melatonin. The ASA group was injected i.p. with 200mg/kg ASA. The ASA + Mel group was injected i.p. with 5mg/kg melatonin 45min after administering 200mg/kg ASA i.p. The Mel + ASA group was injected i.p. with 5mg/kg melatonin 45min before administering 200mg/kg ASA i.p. We found no statistically significant differences in mean histopathological scores in the ASA + Mel group compared to the ASA group. ASA caused shortened villi and loss of the apical villus in the duodenum. The histopathological score was increased and villus height was decreased in the ASA group compared to untreated controls. Treatment with melatonin attenuated the histological damage. In the ASA group, occasional areas showed erosion of villi in the jejunum; however, differences in mean histopathological score in ASA group compared to the other groups were not statistically significant. Malondialdehyde (MDA), glutathione (GSH) and superoxide dismutase (SOD) activities were measured in stomach, duodenal and jejunum tissue. We found increased MDA activity in both stomach and duodenal tissues in the ASA group compared to the control group (p<0.05). We found no statistically significant changes in MDA levels in jejunal tissue in the ASA group compared to the control group. We found no change in SOD activity in either stomach or duodenal tissues in the ASA group compared to the control group. We observed decreased SOD activity in jejunal tissue in the ASA group compared to the control group (p<0.05). We detected no change in GSH activity in stomach, duodenal or jejunal tissues in the ASA group compared to the control group. The stomach damage was less in melatonin treated groups, but the lesions were not completely eliminated. The jejunum in the ASA group retained a nearly normal appearance. We found that melatonin exhibited some healing effects on ASA induced duodenal mucosal injury.

2018-01-01T00:00:00Z, Elbe, Hulya, GÜL, MEHMET, Cetin, Asli, Taslidere, Elif, Ozyalin, Fatma, TÜRKÖZ, YUSUF, Otlu, Ali, TAŞLIDERE, ELİF

Introduction: 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.

2017-01-01, AKıNCı, Ayşin, Eşrefoğlu, MUKADDES, TASLIDERE, ELİF, ATES, B, EŞREFOĞLU, MUKADDES, TAŞLIDERE, ELİF

Background: Oxidative stress has been shown to play a principal role in the pathogenesis of stress-induced gastric injury. Parsley (Petroselinum crispum) contains many antioxidants such as flavanoids, carotenoids and ascorbic acid. Aims: In this study, the histopathological and biochemical results of nutrition with a parsley-rich diet in terms of eliminating stress-induced oxidative gastric injury were evaluated. Study design: Animal experimentation. Methods: Forty male Wistar albino rats were divided into five groups: control, stress, stress + standard diet, stress + parsley-added diet and stress + lansoprazole (LPZ) groups. Subjects were exposed to 72 hours of fasting and later immobilized and exposed to the cold at +4 degrees for 8 hours to create a severe stress condition. Samples from the animals' stomachs were arranged for microscopic and biochemical examinations. Results: Gastric mucosal injury was obvious in rats exposed to stress. The histopathologic damage score of the stress group (7.00±0.57) was higher than that of the control group (1.50±0.22) (p<0.05). Significant differences in histopathologic damage score were found between the stress and stress + parsley-added diet groups (p<0.05), the stress and stress + standard diet groups (p<0.05), and the stress and stress + LPZ groups (p<0.05). The mean tissue malondialdehyde levels of the stress + parsley-added group and the stress + LPZ group were lower than that of the stress group (p<0.05). Parsley supported the cellular antioxidant system by increasing the mean tissue glutathione level (53.31±9.50) and superoxide dismutase (15.18±1.05) and catalase (16.68±2.29) activities. Conclusion: Oral administration of parsley is effective in reducing stress-induced gastric injury by supporting the cellular antioxidant defence system.

2019-01-01T00:00:00Z, KAYA, KÜRŞAT, ÇİFTÇİ, OSMAN, ÖZTANIR, MUSTAFA NAMIK, TAŞLIDERE, ELİF, BAŞAK TÜRKMEN, NEŞE, TAŞLIDERE, ELİF

Beta-glucans (beta g), that have many useful effects on human health, are natural polysaccharides. Our aim in this study was to determine useful effect of beta g against oxidative and neuronal damage caused by global cerebral ischemia/reperfusion (IR) in stroke imitated mice via surgical operation. A total of 40 mice divided into four equal groups randomly. The group 1 (sham operated) was kept as control. Bilateral carotid arteries of subjects in group 2 (I/R) and group 4 (I/R + beta g) were clipped for 15 min, and the mice in group 4 (I/R + beta g) were treated with beta g (50 mg/kg/day), while the mice in group 2 (I/R) were treated with only vehicle for 10 days. The mice of group 3 (beta g) were treated with beta g for 10 days without carotid occlusion. Global cerebral I/R significantly increased oxidative stress and decreased members of anti-oxidant defense system. In addition, I/R caused histopathological damage in the brain tissue. However, beta g treatment ameliorated both oxidative and histopathological effects of I/R. Our present study showed that beta g treatment significantly ameliorated oxidative and histological damage in the brain tissue caused by cerebral I/R. Therefore, beta g treatment can be used as supportive care for ischemic stroke patients.

2017-01-01, EŞREFOĞLU, MUKADDES, TAŞLIDERE, ELİF, CETIN, ASLI, EŞREFOĞLU, MUKADDES, TAŞLIDERE, ELİF

2017-05-01, CAKIR, MUSTAFA İSLAM, DUZOVA, H, TEKIN, S, Taslıdere, ELİF, KAYA, GB, CIGREMIS, Y, OZGOCER, T, YOLOGLU, S, ÇAKIR, MUSTAFA İSLAM, TAŞLIDERE, ELİF