Yazar "Ozer, Abdullah" seçeneğine göre listele
Listeleniyor 1 - 14 / 14
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Assessment of the Effects of Levosimendan and Nigella Sativa on Myocardial Ischemia Reperfusion Injury in Rats(Gazi Univ, Fac Med, 2018) Ozer, Abdullah; Kilic, Yigit; Sezen, Saban Cem; Kucuk, Aysegul; Mardin, Baris; Alkan, Metin; Oktar, LeventObjective: Ischemia-reperfusion injury is a chain of events put in place by tissue ischemia. Reperfusion following the damage of cell causes an active inflammatory response. In our research we tried to evaluate the protective effect of Levosimendan and Nigella Sativa on myocardial ischemia-reperfusion injury in rats. Methods: We included twenty-four Wistar albino rats in our research. The rats were randomly divided into four experimental groups. The coronary arteries of rats in Group C (control group) were not occluded or reperfused. Left anterior descending coronary artery was ligated for 30 min to perform myocardial IR and then reperfused for 2 h in the IR (IR), IR-Levosimendan (24 mu g/kg) (IRL) and IR-Nigella Sativa (0.2 mL/kg) (IRNS) group. Results: Inflammation findings were significantly higher in the IR group compared with the C, IR-NS, and IR-L groups (p=0.001, p=0.019, p=0.019, respectively). Compared with the C, IR-NS, and IR-L groups, the microscopic myocardial disorganization was significantly higher among the IR group (p<0.0001, p=0.007, p=0.001, respectively). The light microscopic myocardial tissue interstitial fibrosis levels were significantly higher in the IR group than in the C, IR-NS, and IR-L groups (p<0.0001, p=0.044, p=0.003, respectively). Conclusion: Levosimendan and NS administration at the beginning of myocardial ischemia can provide varying degrees of protection against negative effects of variations in light microscopic inflammation findings, myocardial disorganization degrees and myocardial tissue interstitial fibrosis levels.Öğe Assessment of the effects of levosimendan and thymoquinone on lung injury after myocardial ischemia reperfusion in rats(Dove Medical Press Ltd, 2018) Sezen, Saban Cem; Kucuk, Aysegul; Ozer, Abdullah; Kilic, Yigit; Mardin, Baris; Alkan, Metin; Tosun, MuratAim: The aim of this study was to investigate the effects of levosimendan and thymoquinone (TQ) on lung injury after myocardial ischemia/reperfusion (I/R). Materials and methods: Twenty-four Wistar albino rats were included in the study. The animals were randomly assigned to 1 of 4 experimental groups. In Group C (control group), left anterior descending artery was not occluded or reperfused. Myocardial I/R was induced by ligation of the left anterior descending artery for 30 min, followed by 2 h of reperfusion in the I/R, I/R-levosimendan (24 mu g/kg) (IRL) group, and I/R-thymoquinone (0.2 mL/kg) (IRTQ) group. Tissue samples taken from the lungs of rats were histochemically stained with H&E and immunohistochemically stained with p53, Bcl 2, Bax, and caspase 3 primer antibodies. Results: Increased expression of p53 and Bax was observed (4+), especially in the I/R group. In IRTQ and IRL groups, expression was also observed at various locations (2+, 3+). H&E staining revealed that that the lungs were severely damaged and the walls of the alveoli were too thick, the number of areas examined was increased during the evaluation. Caspase 3 expression was observed to be at an (1+, 2+) intensity that was usually weak and diffuse in multiple areas. Bcl 2 was not found to be expressed in any of the tissues. H&E staining revealed that that the lungs were severely damaged in the I/R group, with the walls of the channels and alveoli thickened and edematous, and also an intense inflammatory cell migration was observed. Immunohistochemical staining was more prominent in inflammatory areas and structures around the terminal bronchioles. Conclusion: The findings in our study have shown that administration of levosimendan and TQ during I/R increases expression of caspase 3, p53, and Bax in lung tissue and has a protective effect on lung as distant organ. We suggest that findings of this study be elucidated with further large-scale clinical studies.Öğe Efect of Levosimendan and Nigella Sativa on Erythrocyte Deformability During Myocardial Ischaemia-Reperfusion Injury in Rats(Wiley, 2017) Ozer, Abdullah; Comu, Faruk Metin; Kucuk, Aysegul; Kilic, Yigit; Mardin, Baris; Alkan, Metin; Arslan, Mustafa…Öğe Effect of different doses of pregabalin on erythrocyte deformability in rats with lower limb ischemia reperfusion injury(Anaesthesia Pain & Intensive Care, 2017) Ozer, Abdullah; Comu, Faruk Metin; Demirtas, Huseyin; Kilic, Yigit; Mardin, Baris; Ozturk, Levent; Kucuk, AysegulBackground & Objective: Acute ischemia reperfusion (IR) injury observed in the lower extremities occurs especially when a temporary cross-clamp is applied to the abdominal aorta during aortic surgery. Preoperative pregabalin has been used as a part of multimodal analgesia in postoperative pain treatment in recent years. Pregabalin has become one of the increasingly common agents in postoperative analgesia. In this study, we aimed to investigate the effect of pregabalin on erythrocyte deformability in rats undergoing IR. Methodology: 24 male Wistar albino rats weighing between 200-250 g were used in the study. Rats were randomly divided into 4 groups of 6 rats each (Control, Ischemia-Reperfusion (IR), IR-Pregabalin 50 mg (50 mg/kg), IR-Pregabalin 200 mg (200 mg/kg). Pregabalin was administered intraperitoneally 30 min before the procedure. An atraumatic microvascular clamp was placed across the infrarenal abdominal aorta in the IR groups. Following 120 min of ischemia, the clamp was removed and reperfusion was continued for 120 min. All rats were euthanized by intraperitoneal administration of ketamine (100 mg/kg) and taking blood from the abdominal aorta. Erythrocytes were seperated from heparinized whole blood samples. Deformability measurements were made in erythrocyte suspensions in phosphate buffered saline. A constant flow filtrometer system was used to measure erythrocyte deformability and relative resistance was calculated. Results: It was found that the formation of ischemia reperfusion increases the relative resistance according to the control group (p < 0.0001). It was determined that application of pregabalin 50 or 200 mg did not change erythrocyte deformability in ischemia reperfusion-induced rats (p = 0.632, p = 0.811). Conclusion: The administration of 50 or 200 mg of pregabalin has no negative effect on the erythrocyte deformability in ischemia reperfusion-induced rats. We think that pregabalin can be safely used for analgesia in the cases of IR. However, these findings should be supported by clinical and experimental studies carried out in more detailed and broader series.Öğe Effect of picroside II on erythrocyte deformability and lipid peroxidation in rats subjected to hind limb ischemia reperfusion injury(Dove Medical Press Ltd, 2016) Comu, Faruk Metin; Kilic, Yigit; Ozer, Abdullah; Kirisci, Mehmet; Dursun, Ali Dogan; Tatar, Tolga; Arslan, MustafaBackground: Ischemia reperfusion injury (I/R) in hind limb is a frequent and important clinical phenomenon. Many structural and functional damages are observed in cells and tissues in these kinds of injuries. In this study, we aimed to evaluate the effect of picroside II on lipid peroxidation and erythrocyte deformability during I/R in rats. Methods: Rats were randomly divided into four groups-each containing six animals (sham, I/R, sham + picroside II, and I/R + picroside II). The infrarenal section of the abdominal aorta was occluded with an atraumatic microvascular clamp in I/R groups. The clamp was removed after 120 minutes and reperfusion was provided for a further 120 minutes. Picroside II (10 mg.kg(-1)) was administered intraperitoneally to the animals in the appropriate groups (sham + picroside II, I/R + picroside II groups). All rats were euthanized by intraperitoneal administration of ketamine (100 mg.kg(-1)) and taking blood from the abdominal aorta. Erythrocytes were extracted from heparinized complete blood samples. Buffer (PT) and then erythrocytes (PE) were passed through the filtration system and the changes in pressure were measured to investigate the role of serum malondialdehyde and nitric oxide (NO) in lipid peroxidation and erythrocyte deformability index. Results: Deformability index was significantly increased in the I/R group compared to groups sham, sham + picroside-II, and I/R + picroside-II (P<0.0001, P<0.0001, and P=0.007). Malondialdehyde (MDA) and NO levels were evaluated. MDA level and NO activity were also higher in the I/R group than in the other groups. Picroside II treatment before hind limb I/R prevented these changes. Conclusion: These results support that deformability of erythrocytes is decreased in I/R injury and picroside II plays a critical role to prevent these alterations. Further experimental and clinical studies are needed to evaluate and clarify the molecular mechanisms of action and clinical importance of these findings.Öğe Effect of Picroside-2 on Erythrocyte Deformability and Lipid Peroxidation in Rats Subjected to Lower Extremity Ischemia-reperfusion Injury(Wiley-Blackwell, 2015) Comu, Faruk Metin; Kilic, Yigit; Ozer, Abdullah; Kirisci, Mehmet; Dursun, Ali Dogan; Tatar, Tolga; Arslan, Mustafa…Öğe The Effect of Picroside-2 on Erythrocyte Deformability and Lipid Peroxidation in Streptozotocin-Induced Diabetic Rats subjected to Left Anterior Descending Artery-Ischemia reperfusion (conferenceObject)(Wiley-Blackwell, 2015) Comu, Faruk Metin; Polat, Yucel; Ozer, Abdullah; Erer, Dilek; Kirisci, Mehmet; Dursun, Ali Dogan; Arslan, Mustafa…Öğe Effects of alprostadil and iloprost on renal, lung, and skeletal muscle injury following hindlimb ischemia-reperfusion injury in rats(Dove Medical Press Ltd, 2016) Erer, Dilek; Ozer, Abdullah; Demirtas, Huseyin; Gonul, Ipek Isik; Kara, Halil; Arpaci, Hande; Kucuk, AysegulObjectives: To evaluate the effects of alprostadil (prostaglandin [PGE1] analog) and iloprost (prostacyclin [PGI2] analog) on renal, lung, and skeletal muscle tissues after ischemia reperfusion (I/R) injury in an experimental rat model. Materials and methods: Wistar albino rats underwent 2 hours of ischemia via infrarenal aorta clamping with subsequent 2 hours of reperfusion. Alprostadil and iloprost were given starting simultaneously with the reperfusion period. Effects of agents on renal, lung, and skeletal muscle (gastrocnemius) tissue specimens were examined. Results: Renal medullary congestion, cytoplasmic swelling, and mean tubular dilatation scores were significantly lower in the alprostadil-treated group than those found in the I/R-only group (P<0.0001, P=0.015, and P<0.01, respectively). Polymorphonuclear leukocyte infiltration, pulmonary partial destruction, consolidation, alveolar edema, and hemorrhage scores were significantly lower in alprostadil- and iloprost-treated groups (P=0.017 and P=0.001; P<0.01 and P<0.0001). Polymorphonuclear leukocyte infiltration scores in skeletal muscle tissue were significantly lower in the iloprost-treated group than the scores found in the nontreated I/R group (P<0.0001). Conclusion: Alprostadil and iloprost significantly reduce lung tissue I/R injury. Alprostadil has more prominent protective effects against renal I/R injury, while iloprost is superior in terms of protecting the skeletal muscle tissue against I/R injury.Öğe Effects of Carvacrol on Erythrocyte Deformability in Lower Extremity Ischemia Reperfusion Induced Rats(Wiley, 2018) Comu, Faruk Metin; Ozer, Abdullah; Mardin, Baris; Arslan, Mustafa; Kucuk, Aysegul…Öğe Evaluation of the effect of enriched hydrogen saline solution on distant organ (lung) damage in skeletal muscle ischemia reperfusion in rats(Sage Publications Ltd, 2024) Ozer, Abdullah; Erel, Selin; Kucuk, Aysegul; Demirtas, Hueseyin; Sezen, Saban Cem; Boyunaga, Hakan; Oktar, Gursel LeventIntroduction Ischemia-reperfusion (IR) injury is a major concern that frequently occurs during vascular surgeries. Hydrogen-rich saline (HRS) solution exhibits antioxidant and anti-inflammatory properties. This study aimed to examine the effects of HRS applied before ischemia in the lungs of rats using a lower extremity IR model. Material and Methods: After approval was obtained from the ethics committee, 18 male Wistar albino rats weighing 250-280 g were randomly divided into three groups: control (C), IR and IR-HRS. In the IR and IR-HRS groups, an atraumatic microvascular clamp was used to clamp the infrarenal abdominal aorta, and skeletal muscle ischemia was induced. After 120 min, the clamp was removed, and reperfusion was achieved for 120 min. In the IR-HRS group, HRS was administered intraperitoneally 30 min before the procedure. Lung tissue samples were examined under a light microscope and stained with hematoxylin-eosin (H&E). Malondialdehyde (MDA) levels, total sulfhydryl (SH) levels, and histopathological parameters were evaluated in the tissue samples. Results: MDA and total SH levels were significantly higher in the IR group than in the control group (p < 0.0001 and p = 0.001, respectively). MDA and total SH levels were significantly lower in the IR-HRS group than in the IR group (p < 0.0001 and p = 0.013, respectively). A histopathological examination revealed that neutrophil infiltration/aggregation, alveolar wall thickness, and total lung injury score were significantly higher in the IR group than in the control group (p < 0.0001, p = 0.001, and p < 0.0001, respectively). Similarly, alveolar wall thickness and total lung injury scores were significantly higher in the IR-HRS group than in the control group (p = 0.009 and p = 0.004, respectively). A statistically significant decrease was observed in neutrophil infiltration/aggregation and total lung injury scores in the IR-HRS group compared to those in the IR group (p = 0.023 and p = 0.022, respectively). Conclusion: HRS at a dose of 20 mg/kg, administered intraperitoneally 30 min before ischemia in rats, reduced lipid peroxidation and oxidative stress, while also reducing IR damage in lung histopathology. We believe that HRS administered to rats prior to IR exerts a lung-protective effect.Öğe Protective effect of erdosteine on erythrocyte deformability in a rat model of lower limb ischemia/reperfusion injury(Tubitak Scientific & Technical Research Council Turkey, 2018) Ozer, Abdullah; Demirtas, Huseyin; Comu, Faruk Metin; Erer, Dilek; Kilic, Yigit; Mardin, Baris; Oktar, G. LeventBackground/aim: The protective effect of erdosteine on local and distant organ injury due to ischemia/reperfusion has been well documented but its effect on erythrocyte deformability needs further investigation. Our aim was to investigate the effect of erdosteine on erythrocyte deformability in the infrarenal aorta of rats undergoing ischemia/reperfusion. Materials and methods: Our study was conducted with 18 Wistar albino rats. Rats were divided into 3 groups: a randomized control group (group 'control', n = 6), an ischemia/reperfusion group without erdosteine (group 'ischemia/reperfusion', n = 6), and an ischemia/reperfusion group with erdosteine at 150 mg kg(-1), intraperitoneally (group 'ischemia/reperfusion - erdosteine', n = 6). Packs of erythrocytes were prepared from heparinized blood samples and deformability measurements were conducted. Results: Comparisons of the control and ischemia/reperfusion - erdosteine groups revealed similar results (P = 0.051). The values of the ischemia/reperfusion group were significantly higher than those of the control and ischemia/reperfusion - erdosteine groups (P < 0.0001 and P = 0.024, respectively). Relative resistance, a marker of erythrocyte deformability, was increased significantly by ischemia/reperfusion compared to the control and ischemia/reperfusion - erdosteine groups (P < 0.05). Conclusion: We detected unfavorable effects of ischemia/reperfusion on erythrocyte deformability, which may lead to disturbance in blood flow and hence tissue perfusion in the infrarenal rat aorta. We also found that erdosteine had beneficial effects by reversing undesirable effects of ischemia/reperfusion. However, these promising results should be further supported by more detailed studies with larger volumes.Öğe The Effect of Hydrogen-Rich Saline Solution on Erythrocyte Deformability in Lower Limb Ischemia Reperfusion Injury in Rats(Gazi Univ, Fac Med, 2021) Ozer, Abdullah; Arslan, Mustafa; Comu, Faruk Metin; Kucuk, Aysegul; Mardin, Baris; Kocak, Basak; Oktar, Gursel LeventAim: We aimed to investigate the effects of HRSS on erythrocyte deformability in lower limb ischemia reperfusion (IR) injury in rats. Methods: Eighteen male Wistar albino rats used in this study. The animals were randomly divided into three experimental groups as control, IR and IR-HRSS. 20 mg.kg-1HRSS was administered (20 mg.kg(-1) i.p)30 min before the procedure. An atraumatic microvascular clamp was placed across the infrarenal abdominal aorta in the IR groups. 120 min ischemia and 120 min reperfusion is applied to the groups. Erythrocytes were obtained from heparinized whole blood samples for deformability measurements. Kruskal-Wallis test was used for independent samples and Mann-Whitney U test was used to analyze differences between groups. Results: Ischemia reperfusion was found to increase relative resistance to the control group. The erythrocyte deformability index was significantly higher in IR and IR-HRSS groups than the control group. HRSS application significantly decreased erythrocyte deformability index compared to IR group. Conclusion: IR induced rats decreased erythrocyte deformability was partially corrected by HRSS. We believe that the protective effects of HRSS in IR injury and its use indications can be demonstrated in detail as long as the findings we have reached in our study are supported by other studies.Öğe The Effect of Proanthocyanidin on Ischemia-Reperfusion Injury in Skeletal Muscles of Rats(Mdpi, 2024) Ozer, Abdullah; Kocak, Basak; Sezen, Saban Cem; Arslan, Mustafa; Kavutcu, MustafaBackground and Objectives: Lower limb skeletal muscle ischemia-reperfusion (IR) injury is associated with increased morbidity and mortality, and it is common in several clinical situations such as aortic aneurysms repairment, peripheral arterial surgery, vascular injury repairment, and shock. Although it is generally accepted that oxidative stress mediators have a significant role in IR injury, its precise mechanism is still unknown. Anecdotally, it is sustained not only by structural and functional changes in the organ it affects but also by damage to distant organs. The purpose of this report is to illustrate the effect of proanthocyanidin on IR injury. Materials and Methods: In our study, 18 male Wistar albino rats were used. The subjects were divided into three groups containing six mice each (control, C; ischemia-reperfusion, IR; ischemia-reperfusion and proanthocyanidin; IR-PRO). Intraperitoneal proanthocyanidin was given to the IR and proanthocyanidin groups 30 min before laparotomy, and 1 h ischemia led to these two groups. After one hour, reperfusion started. Muscle atrophy-hypertrophy, muscle degeneration-congestion, fragmentation-hyalinization, muscle oval-central nucleus ratio, leukocyte cell infiltration, catalase enzyme activity, and TBARS were all examined in lower-limb muscle samples after one hour of reperfusion. Results: When skeletal muscle samples were evaluated histopathologically, it was discovered that muscle atrophy-hypertrophy, muscle degeneration-congestion, fragmentation-hyalinization, and leukocyte cell infiltration with oval-central nucleus standardization were significantly higher in the IR group than in the C and IR-P groups. Oval-central nucleus standardization was significantly higher in the IR and IR-PRO groups than in the control group. TBARS levels were significantly higher in the IR group than in the control and IR-PRO groups, while catalase enzyme activity was found to be significantly lower in the IR group than in the control and IR-PRO groups. Conclusions: As a consequence of our research, we discovered that proanthocyanidins administered before IR have a protective impact on skeletal muscle in rats. Further research in this area is required.Öğe The effect of silymarin on ischemia-reperfusion injury in skeletal muscles of rats silymarin and ischemia-reperfusion injury(Turkish National Vascular and Endovascular Surgery Society, 2024) Ozer, Abdullah; Kocak, Basak; Arslan, Mustafa; Mardin, Baris; Kucuk, Aysegul; Sezen, Saban Cem; Zor, Mustafa HakanAim: Although the precise process is not entirely elucidated, it is well-known that oxidative stress mediators contribute to ischemia-reperfusion (I/R) injury. The impact of silymarin on I/R injury in many different tissues has been examined. For this purpose, we planned to see the effect of silymarin on muscle tissue in rats subjected to lower extremity I/R injury. Material and Methods: We used 18 male Wistar albino rats weighing 225-275 g. Each of the three groups of rats [Control (C), Ischemia-Reperfusion (I/R), and Silymarin-Ischemia/Reperfusion (S-I/R)] consisted of six rats. Silymarin was administered intraperitoneally 30 minutes before the procedure. (100 mg/kg-1) In Group I/R, the infrarenal abdominal aorta was clamped with a microvascular clamp. The clamp was removed after 120 minutes, and reperfusion was achieved for the next 120 minutes. At the end of the reperfusion period, muscle tissue samples were collected, and Malondialdehyde (MDA), catalase (CAT) enzyme activity levels and histopathological parameters were compared. Results: In the histopathological examination, no degeneration was observed in the muscle fibers in the Group C, while findings of striated muscle damage such as muscle atrophy/hypertrophy, muscle degeneration/congestion, internalization of the muscle nucleus/oval/central nucleus, fragmentation/hyalinization and leukocyte cell infiltration were seen in the Group I/R. In Group S-I/R, muscle atrophy /hypertrophy, internalization of the muscle nucleus/oval/central nucleus, fragmentation/hyalinization, and leukocyte cell infiltration were observed to improve these damaged areas compared to Group I/R. MDA levels in the Group I/R were significantly higher compared to Group C and S-I/R. The activity of the CAT enzyme was much higher in Group I/R compared to Group C. Conclusion: Our study revealed that 100 mg/kg-1 silymarin administered by intraperitoneal injection 30 minutes before ischemia effectively decreased lipid peroxidation, oxidative stress, and the injury caused by I/R in muscle histology in rats. © 2024, Turkish National Vascular and Endovascular Surgery Society. All rights reserved.
