Browsing by Author "Ozdemir, Cagri"

Now showing 1 - 7 of 7

Citation - WoS: 3
Citation - Scopus: 3
The Effect of Cerium Oxide (ceo₂) on Ischemia-Reperfusion Injury in Skeletal Muscle in Mice With Streptozocin-Induced Diabetes
(Mdpi, 2024) Ozer, Abdullah; Sengel, Necmiye; Kucuk, Ayseguel; Yigman, Zeynep; Ozdemir, Cagri; Kilic, Yigit; Arslan, Mustafa; Basic Sciences; 08. Medical School; 01. Atılım University
Objective: Lower extremity ischemia-reperfusion injury (IRI) may occur with trauma-related vascular injury and various vascular diseases, during the use of a tourniquet, in temporary clamping of the aorta in aortic surgery, or following acute or bilateral acute femoral artery occlusion. Mitochondrial dysfunction and increased basal oxidative stress in diabetes may cause an increase in the effects of increased reactive oxygen species (ROS) and mitochondrial dysfunction due to IRI. It is of great importance to examine therapeutic approaches that can minimize the effects of IRI, especially for patient groups under chronic oxidative stress such as DM. Cerium oxide (CeO2) nanoparticles mimic antioxidant enzymes and act as a catalyst that scavenges ROS. In this study, it was aimed to investigate whether CeO2 has protective effects on skeletal muscles in lower extremity IRI in mice with streptozocin-induced diabetes. Methods: A total of 38 Swiss albino mice were divided into six groups as follows: control group (group C, n = 6), diabetes group (group D, n = 8), diabetes-CeO2 (group DCO, n = 8), diabetes-ischemia/reperfusion (group DIR, n = 8), and diabetes-ischemia/reperfusion-CeO2 (group DIRCO, n = 8). The DCO and DIRCO groups were given doses of CeO2 of 0.5 mg/kg intraperitoneally 30 min before the IR procedure. A 120 min ischemia-120 min reperfusion period with 100% O-2 was performed. At the end of the reperfusion period, muscle tissues were removed for histopathological and biochemical examinations. Results: Total antioxidant status (TAS) levels were found to be significantly lower in group DIR compared with group D (p = 0.047 and p = 0.022, respectively). In group DIRCO, total oxidant status (TOS) levels were found to be significantly higher than in group DIR (p < 0.001). The oxidative stress index (OSI) was found to be significantly lower in group DIR compared with group DCO (p < 0.001). Paraoxanase (PON) enzyme activity was found to be significantly increased in group DIR compared with group DCO (p < 0.001). The disorganization and degeneration score for muscle cells, inflammatory cell infiltration score, and total injury score in group DIRCO were found to be significantly lower than in group DIR (p = 0.002, p = 0.034, and p = 0.001, respectively). Conclusions: Our results confirm that CeO2, with its antioxidative properties, reduces skeletal muscle damage in lower extremity IRI in diabetic mice.
The Effect of Different Doses Apelin 13 on Erythrocyte Deformability in Rats
(Wiley, 2019) Dursun, Ali Dogan; Ozdemir, Cagri; Comu, Faruk Metin; Kucuk, Aysegul; Arslan, Mustafa; Basic Sciences; 08. Medical School; 01. Atılım University
[No Abstract Available]
Citation - WoS: 12
Citation - Scopus: 12
The Effect of Sevoflurane and Fullerenol C 60 on the Liver and Kidney in Lower Extremity Ischemia-Reperfusion Injury in Mice With Streptozocin-Induced Diabetes
(Dove Medical Press Ltd, 2023) Sengel, Necmiye; Kucuk, Ayseguel; Ozdemir, Cagri; Sezen, Saban Cem; Kip, Gulay; Er, Fatma; Arslan, Mustafa; 01. Atılım University
Objective: This study aimed to demonstrate whether fullerenol C60, sevoflurane anesthesia, or a combination of both had protective effects on the liver and kidneys in lower extremity ischemia-reperfusion injury (IRI) in mice with streptozocin-induced diabetes. Methods: A total of 46 Swiss albino mice were divided into six groups as follows: control group (group C, n=7), diabetes group (group D, n=7), diabetes-ischemia/reperfusion (group DIR, n=8), diabetes-ischemia/reperfusion-fullerenol C60 (group DIR-FC60, n=8), diabetes-ischemia/reperfusion-sevoflurane (group DIR-S, n=8), and the diabetes-ischemia/reperfusion-fullerenol C60-sevoflurane (group DIR-S-FC60, n=8). Fullerenol C60 (100mg/kg) was administered intraperitoneally 30 min before the ischemia-reperfusion procedure to the fullerenol groups (DIR-FC60 and DIR-S-FC60). In the DIR groups, 2 hours (h) ischemia-2h reperfusion periods were performed. In the sevoflurane groups, sevoflurane was applied during the ischemia-reperfusion period with 100% O2. Liver and kidney tissues were removed at the end of the reperfusion procedure for biochemical and histopathological examinations.Results: In liver tissue, hydropic degeneration, sinusoidal dilatation, pycnotic nuclei, prenecrotic cells, and mononuclear cell infiltration in parenchyma were significantly more frequent in group DIR than in groups D and group C. In terms of the histopathologic criteria examined, more positive results were seen in group DIR-FC60, and when group DIR-FC60 was compared with group DIR, the difference was significant. The best results in AST, ALT, glucose, TBARS levels, and SOD enzyme activities in liver tissue were in group DIR-FC60 compared with group DIR, followed by groups DIR-S-FC60 and DIR-S, respectively. Regarding TBARS levels and SOD enzyme activities in kidney tissue, the best results were in groups DIR-FC60, DIR-S-FC60, and DIR-S, respectively.Conclusion: According to our findings, it is clear that fullerenol C60 administered intraperitoneally 30 min before ischemia, alone or together with sevoflurane, reduces oxidative stress in distant organ damage caused by lower extremity IRI, and reduces liver and kidney tissue damage in histopathologic examinations.
Citation - WoS: 3
Citation - Scopus: 3
Effects of Cerium Oxide on Kidney and Liver Tissue Damage in an Experimental Myocardial Ischemia-Reperfusion Model of Distant Organ Damage
(Mdpi, 2024) Gunes, Isin; Dursun, Ali Dogan; Ozdemir, Cagri; Kucuk, Aysegul; Sezen, Saban Cem; Arslan, Mustafa; Ozer, Abdullah; Basic Sciences; 08. Medical School; 01. Atılım University
Background and Objectives: Ischemia-reperfusion (I/R) injury is a process in which impaired perfusion is restored by restoring blood flow and tissue recirculation. Nanomedicine uses cutting-edge technologies that emerge from interdisciplinary influences. In the literature, there are very few in vivo and in vitro studies on how cerium oxide (CeO2) affects systemic anti-inflammatory response and inflammation. Therefore, in our study, we aimed to investigate whether CeO2 administration has a protective effect against myocardial I/R injury in the liver and kidneys. Materials and Methods: Twenty-four rats were randomly divided into four groups after obtaining approval from an ethics committee. A control (group C), cerium oxide (group CO), IR (group IR), and Cerium oxide-IR (CO-IR group) groups were formed. Intraperitoneal CeO2 was administered at a dose of 0.5 mg/kg 30 min before left thoracotomy and left main coronary (LAD) ligation, and myocardial muscle ischemia was induced for 30 min. After LAD ligation was removed, reperfusion was performed for 120 min. All rats were euthanized using ketamine, and blood was collected. Liver and kidney tissue samples were evaluated histopathologically. Serum AST (aspartate aminotransferase), ALT (alanine aminotransaminase), GGT (gamma-glutamyl transferase), glucose, TOS (Total Oxidant Status), and TAS (Total Antioxidant Status) levels were also measured. Results: Necrotic cell and mononuclear cell infiltration in the liver parenchyma of rats in the IR group was observed to be significantly increased compared to the other groups. Hepatocyte degeneration was greater in the IR group compared to groups C and CO. Vascular vacuolization and hypertrophy, tubular degeneration, and necrosis were increased in the kidney tissue of the IR group compared to the other groups. Tubular dilatation was significantly higher in the IR group than in the C and CO groups. TOS was significantly higher in all groups than in the IR group (p < 0.0001, p < 0.0001, and p = 0.006, respectively). However, TAS level was lower in the IR group than in the other groups (p = 0.002, p = 0.020, and p = 0.031, respectively). Renal and liver histopathological findings decreased significantly in the CO-IR group compared to the IR group. A decrease in the TOS level and an increase in the TAS level were found compared to the IR group. The AST, ALT, GGT, and Glucose levels are shown. Conclusions: CeO2 administered before ischemia-reperfusion reduced oxidative stress and ameliorated IR-induced damage in distant organs. We suggest that CeO2 exerts protective effects in the myocardial IR model.
Farklı Dozlarda Uygulanan Apelin-13’ün Analjezik Minimum Etkin Dozu ve Böbrek Dokusu Üzerine Etkisi: Deneysel Çalışma
(2024) Küçük, Ayşegül; Dursun, Alı Dogan; Arslan, Mustafa; Ozdemir, Cagri; Sezen, Şaban Cem; 01. Atılım University
Amaç: Apelin ve APJ sinyal yolu; kalp, böbrek ve akciğer dâhil çeşitli dokularda eksprese edilmektedir. Bu yol kan bas ıncı, kardiyak kontraktilite, kalp h ızı, nosisepsiyon, apoptozis ve inflamasyon üzerinde çeşitli etkilere sahiptir. Mekanizması hâlen anlaşılamamasına rağmen Apelin-13’ün analjezik etkinli ği gösterilmi ştir. Gelecekte koruyucu ve tedavi edici bir ajan olarak kullan ılabilecek olması insan sağlığına önemli katk ılar sağlayacaktır. Bu sebeple ratlarda Apelin- 13’ün minimum analjezik etkin dozunu ve böbrek üzerine etkilerini araştırmayı amaçladık. Gereç ve Yöntemler: 30 adet Wistar Albino erkek rat, randomize olarak 5 gruba ayrıldı. Ratlar kontrol, Apelin-25, Apelin-50, Apelin-100 ve Apelin-200 gruplar ı olarak isimlendirildi. Apelin-13 intraperitoneal olarak 25, 50, 100 ve 200 μg/kg uyguland ı. Kontrol grubuna intraperitoneal olarak ayn ı hacimde salin uygulandı. Apelin uygulanmasından sonra 30. dk, 1. ve 2. saatlerde Hot Plate testi ile analjezik etkinlik de ğerlendirildi. 24 saat sonra histolojik ve biyokimyasal değerlendirmeler için tüm ratlardan kan ve doku örnekleri alındı. Bulgular: Hot Plate sonuçlarına bakıldığında 50 μg/kg ve üzeri Apelin-13’ün analjezik etkinlik gösterdiği tespit edildi. 25 μg/kg dozda analjezik etki görülmedi. 100 ve 200 μg/kg Apelin-13 uygulanan ratların böbrek dokusunda vasküler vakuolizasyon ve hipertrofi, Bowman aralık dilatasyonu ve tübüler hücre dökülmesi anlamlı olarak artmış bulundu. 200 μg/kg Apelin-13 uygulanan ratlarda doku oksidatif stres belirteçleri daha yüksekti. Sonuç: Literatürde Apelin-13’ün farklı dozlarda analjezik etkileri ile ilgili çalışmalara rastlamadık. 200 μg/kg Apelin-13 uygulamas ının böbrek dokusunu olumsuz etkiledi ğini bulduk. Apelin-13’ün minimum analjezik etkin dozunun intraperitoneal olarak uygulanan 50 μg/kg olduğunu tespit ettik.
Investigation of Analgesic Minimum Effective Dose of Apelin-13 With Different Doses of Intraperitoneal Injections and its Effects on Kidney Tissue
(Wiley, 2020) Dursun, Ali; Ozdemir, Cagri; Sezen, Saban; Kucuk, Aysegul; Arslan, Mustafa; Basic Sciences; 08. Medical School; 01. Atılım University
[No Abstract Available]
Citation - WoS: 7
Citation - Scopus: 12
Therapeutic Efficacy of Boric Acid Treatment on Brain Tissue and Cognitive Functions in Rats With Experimental Alzheimer's Disease
(Dove Medical Press Ltd, 2023) Ozdemir, Cagri; Arslan, Mustafa; Kucuk, Aysegul; Yigman, Zeynep; Dursun, Ali Dogan; Basic Sciences; 08. Medical School; 01. Atılım University
Introduction: Oxidative stress has an important role in the pathophysiology of Alzheimer's disease (AD), the most common type of dementia. Boric acid (BA) contributes significantly to the protection of the brain by reducing lipid peroxidation and supporting antioxidant defense. We aimed to evaluate the therapeutic potential of BA treatment in AD rats. Materials and Methods: Four groups were formed as Control (C), Alzheimer's (A), Alzheimer's + Boric acid (ABA), Boric acid (BA). Intracerebroventricular injection of Streptozotocin (STZ) was preferred to create an AD. After 4 weeks, BA was applied 3 times every other day. The Radial Arm Maze Test (RAMT) was used to evaluate memory and learning abilities. Biochemical and histopathological evaluations were made in the hippocampus. Results: Initial RAMT inlet/outlet (I/O) numbers were similar. Two weeks after STZ injection, I/O numbers decreased in group A and ABA compared to group C and BA (p<0.05). After the second BA application, I/O numbers increased in the ABA group compared to the A group (p<0.05). In group A, PON-1, TOS and OSI levels were higher and TAS levels were lower than in groups BA and C. After BA treatment, PON-1 and OSI levels were lower in the ABA group than in the A group (p<0.05). Although there was an increase in TAS value and a decrease in TOS, this did not make a statistical difference. The thickness of the pyramidal cell in CA1 and the granular cell layers in the dentate gyrus, and the number of intact and degenerated neurons in the pyramidal cell layer were similar between the groups. Discussion: Significant improvement in learning and memory abilities after BA application is promising for AD. Conclusion: These results show that BA application positively affects learning and memory abilities, and reduces oxidative stress. More extensive studies are required to evaluate histopathological efficacy.