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Zinc Ameliorates Nogo-A Receptor and Osteocalcin Gene Expression in Memory-Sensitive Rat Hippocampus Impaired by Intracerebroventricular Injection of Streptozotocin
(Springernature, 2023) Gumus, Haluk; Baltaci, Saltuk Bugra; Unal, Omer; Gulbahce-Mutlu, Elif; Mogulkoc, Rasim; Baltaci, Abdulkerim Kasim
Metabolic dysfunction is a critical step in the etiopathogenesis of Alzheimer's disease. In this progressive neurological disorder, impaired zinc homeostasis has a key role that needs to be clarified. The aim of this study was to investigate the effect of zinc deficiency and administration on hippocampal Nogo-A receptor and osteocalcin gene expression in rats injected with intracerebroventricular streptozotocin (icv-STZ). Forty male Wistar rats were divided into 5 groups in equal numbers: Sham 1 group received icy artificial cerebrospinal fluid (aCSF); Sham 2 group received icy a CSF and i.p. saline; STZ group received 3 mg/kg icy STZ; STZ-Zn-deficient group received 3 mg/kg icy STZ and fed a zinc-deprived diet; STZ-Zn-supplemented group received 3 mg/kg icy STZ and i.p. zinc sulfate (5 mg/kg/day). Hippocampus tissue samples were taken following the cervical dislocation of the animals under general anesthesia. Nogo-A receptor and osteocalcin gene expression levels were determined by real-time-PCR method. Zinc supplementation attenuated the increase in hippocampal Nogo-A receptor gene expression, which was significantly increased in zinc deficiency. Again, zinc supplementation upregulated the intrinsic protective mechanisms of the brain by activating osteocalcin-expressing cells in the brain. The results of the study show that zinc has critical effects on Nogo-A receptor gene expression and hippocampal osteocalcin gene expression levels in the memory-sensitive rat hippocampus that is impaired by icv-STZ injection. These results are the first to examine the effect of zinc deficiency and supplementation on hippocampal Nogo-A receptor and osteocalcin gene expression in icv-STZ injection in rats.
The Effects of Resveratrol and Melatonin on Cardiac Dysfunction in Diabetic Elderly Female Rats
(Acad Sciences Czech Republic, Inst Physiology, 2023) Akgün-Ünal, Nilüfer; Özyıldırım, Serhan; Ünal, Ömer; Baltacı, Saltuk Buğra; Moğulkoç, Rasim; Baltacı, Abdulkerim Kasım
We aimed to investigate the effects of melatonin and resveratrol on diabetes-related papillary muscle dysfunction and structural heart disorders. The protective effect of resveratrol and melatonin supplementation on cardiac functions was investigated in a diabetic elderly female rat model. 16-month-old rats (n=48) were allocated into 8 groups. Group1: Control, Group2: Resveratrol Control, Group3: Melatonin Control, Group4: Resveratrol and Melatonin Control, Group5: Diabetes, Group6: Diabetes Resveratrol, Group7: Diabetes Melatonin, Group8: Diabetes Resveratrol and Melatonin. Streptozotocin was injected intraperitoneally to the rats for experimental diabetes induction. Thereafter, resveratrol (intraperitoneal) and melatonin (subcutaneous) were administered for 4 weeks. Resveratrol and melatonin had a protective effect on the contractile parameters and structural properties of the papillary muscle, which was impaired by diabetes. it has been presented that diabetes impairs the contractile function of the papillary muscle for each stimulus frequency tested and the responses obtained as a result of Ca+2 uptake and release mechanisms from the Sarcoplasmic reticulum, and it has been observed that these effects are improved with resveratrol and melatonin injection. The decrease in myocardial papillary muscle strength in the diabetic elderly female rat can be reversed with the combination of resveratrol, melatonin and resveratrol+melatonin. Melatonin+resveratrol supplementation is no different from melatonin and/or resveratrol supplementation. Resveratrol and melatonin supplementation may have a protective effect on cardiac functions in a diabetic elderly female rat model.
The effects of resveratrol and melatonin on biochemical and molecular parameters in diabetic old female rat hearts
(Pergamon-Elsevier Science Ltd, 2023) Akgün-Ünal, Nilüfer; Özyıldırım, Serhan; Ünal, Ömer; Gülbahçe-Mutlu, Elif; Mogulkoç, Rasim; Baltaci, Abdulkerim Kasim
The roles of melatonin and resveratrol-enhanced activation of SIRT1 (silent information regulator 1), GLUT4 (glucose transporter type 4), and PGC-1 alpha (peroxisome proliferator-activated receptor gamma coactivator 1 -alpha) in mediating the protective effects on the heart in aged female rats with streptozotocin-induced dia-betes were investigated. 16-month-old 48 Wistar female rats were separated into 8 groups with equal numbers. Group 1: Control, Group 2: Resveratrol Control, Group 3: Melatonin Control, Group 4: Resveratrol and Melatonin Control, Group 5: Diabetes, Group 6: Diabetes Resveratrol, Group 7: Diabetes Melatonin, Group 8: Diabetes Resveratrol and Melatonin. A single dose of 40 mg/kg intraperitoneal streptozotocin was injected into the rats of Groups 5, 6, 7, and 8 to induce experimental diabetes. Blood glucose levels were measured from the tail veins of the animals six days after the injections, using a diagnostic glucose kit. Rats with a blood glucose levels >= 300 mg/dl were considered diabetic. 5 mg/kg/day of resveratrol (intraperitoneal) and melatonin (subcutaneous) were administered for four weeks. At the end of the applications, SIRT1, GLUT4, PGC-1 alpha gene expression as well as MDA and GSH levels in the heart tissues were determined by the PCR method from heart tissue samples taken under general anesthesia.The findings of our study show that suppressed antioxidant activity and decreased GLUT4, SIRT1, and PGC-1 alpha gene expression in heart tissue can be reversed by the combination of resveratrol, melatonin, and resveratrol + melatonin in a diabetic aged female rat model. Resveratrol and melatonin supplementation may have a pro-tective effect on cardiac functions in the diabetic aged female rat model.
The Effects of Esmolol on Erythrocyte Deformability in Rat Liver Ischemia-Reperfusion Injury
(Gazi Univ, Fac Med, 2021) Sabuncu, Ülkü; Küçük, Ayşegül; Çomu, Faruk Metin; Salman, Nevriye; Kip, Gülay; Ünal, Yusuf; Arslan, Mustafa
Background: Esmolol has protective effects in ischemia reperfusion (IR) injury. The purpose of our study was to look into the effects of this which esmolol on erythrocyte deformability in rat liver IR injury model. Materials and Methods: We used 24 Wistar albino rats as subjects in our study. They were divided into 4 groups; randomized control group (group C; n=6), esmolol group 200 mu g/kg/min intravenously (group E; n=6), IR group (group IR; n=6) and IR group with esmolol 200 mu g/kg/min intravenously (group IR-E; n=6). Erythrocyte packs were prepared from heparinized blood samples and deformability measurements were performed. Results: It was discovered that ischemia reperfusion increased the relative resistance when compared to control group (p<0.0001). Erythrocyte deformibility index was found to be higher in IR and IR-E groups compared to control group (p<0.0001, p=0.002, respectively). Esmolol application decreased the erythrocyte deformibiltiy index when compared to control group (p=0.017). Conclusion: In this research, esmolol application has improved the ertyhrocyte deformibity in liver rat IR injury partially. We also found that esmolol had beneficial effects by reversing undesirable effects of IR. Further studies with larger volume are required to support our promising results.
The effects of fullerenol nanoparticles on erythrocyte deformability in sevoflurane applied rats
(Anaesthesia Pain & Intensive Care, 2021) Sivgin, Volkan; Küçük, Ayşegül; Çomu, Faruk Metin; Yalçın, Ayşe Gülfem; Arslan, Mustafa
Background & objective: Oxidative damage causing alterations in erythrocyte deformability due to anesthesia might be one of the factors responsible for the deterioration of the tissue and organ perfusion. The antioxidant properties of fullerenol nanoparticles, used in medical field together with the developing technology, have been shown in the literature. We investigated the effects of fullerenol nanoparticles, used before sevoflurane anesthesia, on the erythrocyte deformability in the rats. Methodology: Twenty-four male Wistar Albino rats were used in this study and randomly divided into four groups, six in each group; Group C (Control Group), Group S (Group Sevoflurane), Group F (Group Fullerenol), Group FS (Group Fullerenol-Sevoflurane). Fullerenol was given to the Group F and Group FS at a dose of 100 mg/kg. Sevoflurane was administered to rats in the Groups S and FS at 3% concentration. Erytrocytes deformability was measured by the constant-current filtrometre system and the deformability index was interpreted. All the data were processed by variance analysis in SPSS 22.0 for Windows statistical software. Variance analysis and Kruskal-Wallis test were used to evaluate the data. Mann-Whitney U test with Bonferroni correction were used to evaluate the variables with significance. Results: Relative resistance increased in all groups due to sevoflurane administration (p < 0.0001). The erythrocyte deformability index was significantly higher in the sevoflurane group than in the control and fullerenol groups (p < 0.0001, p = 0.002, respectively). Fullerenol administration, before 30 min of sevoflurane treatment, was found to decrease erythrocyte deformability index significantly compared to sevoflurane group (p = 0.017). Conclusion: Administring 100 mg/kg fullerenol nanoparticles intraperitoneally 30 min before sevoflurane reduces erythrocyte deformability.
The Effect of Repeated Doses of Intermittent Ketamine on Erythrocyte Deformability in Infant Rats
(Gazi Univ, Fac Med, 2022) Kaşıkara, Hülya; Çomu, Faruk Metin; Küçük, Ayşegül; Öztürk, Levent; Arslan, Mustafa
Aim: Blood rheology, which is affected by many factors, is also known to be affected by drugs used for anesthesia. Therefore, we aimed to investigate the effects of 21-day ketamine administration on erythrocyte deformability in 3-week-old infant rats Methods: Twelve 12 week old Wistar Albino male infant rats were randomly divided into two groups. Ketamine group (K), n:6, 50 mg/kg ketamine was administered intraperitoneally at the same time daily for 21 days. Saline group (S), n.6, 50 mg/kg normal saline was administered intraperitoneally at the same time daily for 21 days. After 21 days of administration, all rats were euthanized by intraperitoneal ketamine (100 mg/kg) and taken blood from abdominal aorta. Erythrocytes were obtained from heparinized blood samples. Deformability measurements were performed on erythrocyte suspensions in phosphate buffered saline. For the measurement of erythrocyte deformability, a constant flow filtrometer system was used and the relative resistance was calculated. Results: Ketamine administration was found to increase relative resistance. The erythrocyte deformability index was significantly higher in the ketamine group compared to the saline group (p:0.006). Conclusion: We found that long-term repeated ketamine administration negatively affected erythrocyte deformability. In our study, we think that the results obtained in daily anesthesia will be a guide for repeated administration of ketamine, especially in radiation oncology. However, these findings should be supported by clinical and experimental studies in more detailed and large series.
The effect of cerium oxide on erythrocyte deformability in ischemia-reperfusion injury in rats administered sevoflurane
(Bayrakol Medical Publisher, 2022) Turicay, Aydin; Şıvgın, Volkan; Çomu, Faruk Metin; Küçük, Ayşegül; Özdemirkan, Aycan; Güneş, Işın; Arslan, Mustafa
Aim: Ischemia-reperfusion (IR) injury is a common problem in vascular surgery. Acute IR damage observed in the lower extremities, especially in aortic surgery, occurs following temporary cross-clamping of the abdominal aorta. Disruption in blood rheology disrupts microvascular blood flow, leading to exacerbation of microangiopathy. It is known that drugs used for anesthesia affect blood rheology, which is affected by many factors. Therefore, we aimed to investigate the effects of cerium oxide on erythrocyte deformability before sevoflurane anesthesia in rats with lower extremity IR. Material and Methods: After approval by the ethics committee, 30 rats were randomly divided into 5 groups. Control (group C), IR (group IR), IR-cerium oxide (group IRCO), IR-sevoflurane (group IRS), IR-cerium oxide-sevoflurane (group IRCOS). Infrarenal abdominal aorta and atraumatic microvascular clamp were placed in IR groups 30 minutes after intraperitoneal cerium oxide was administered at a dose of 0.5 mg / kg. One hundred and twenty minutes later, the clamp was removed and reperfused for 120 minutes. Sevoflurane was applied at a rate of 2.3% at 4 L/min and 100% oxygen during IR for the minimum alveolar concentration to be 1 for rats. All rats were administered intraperitoneal ketamine (100 mg/kg) and euthanasia was performed by taking blood from the abdominal aorta. Erythrocytes were obtained from heparinized whole blood samples. Deformability measurements were made in erythrocyte suspensions in phosphate-buffered saline. A constant flow filtrometer system was used for the measurement of erythrocyte deformability and relative resistance was calculated. Results: Erythrocyte deformability index was found to be significantly different between the groups (p=0.002). Compared to the control group, the erythrocyte deformability index was significantly higher in IR and IRS groups (p<0.0001, p=0.003, respectively). In the IRCO and IRCOS groups, the erythrocyte deformability index was found to decrease significantly compared to the IR group (p=0.008, p=0.025, respectively). The erythrocyte deformability index was similar in Group C and in the IRCO and IRCOS groups (p=0.453, p=0.120, respectively). Discussion: We determined that cerium oxide administered intraperitoneally 30 minutes before ischemia in rats corrects the erythrocyte deformability deteriorated in IR-generated rats. We also found that cerium oxide had beneficial effects by reversing undesirable effects of IR. Further studies with larger volumes are required to support our promising results
Assessment of tebuconazole exposure on bovine testicular cells and epididymal spermatozoa
(Akademiai Kiado Zrt, 2021) Kabakci, Ruhi; Kaya, Abdulkadir; Yiğit, Ayşe Arzu; Varisli, Ömer
This study is the first to investigate the effects of tebuconazole (TEB) on the physiological functions of bovine testicular cells and epididymal spermatozoa. Motility and plasma membrane integrity of spermatozoa exposed to TEB (0.001-100 mM) were evaluated at different incubation times (0-6 h), while TEB-induced spermiotoxicity was assessed after 24 h in cell cultures. Testicular cells, obtained from the parenchyma of bovine testes, were seeded at 1.0 x 10(4) and 1.5 x 10(6) cells/well in 96- and 12-well culture plates and incubated for 48 h in culture media containing TEB (0.001- 100 mM) to evaluate cytotoxicity and hormone release, respectively. TEB did not affect the motility and plasma membrane integrity. However, significant spermiotoxicity occurred at higher TEB (1-100 mM) concentrations (P < 0.05) compared to control and lower doses. Although no dose caused cytotoxicity in testicular cells (P > 0.05), 1 and 100 mM TEB caused a significant increase in testosterone secretion (P < 0.05). As a result, high doses of TEB (1-100 mM) had slightly suppressive effects on spermatozoa; however, these doses had stimulatory effects on testosterone secretion by testicular cells. It appears that the disruption of hormonal homeostasis of testicular cells after TEB exposure may result in metabolic and especially reproductive adverse effects in bulls.
Consequences of Social Isolation in Rats on Their Antioxidant Defense System and Erythrocyte Deformability
(Aves, 2009) Aydoğan, Sami; Aşçıoğlu, Meral; Çomu, Faruk Metin
Purpose: In this study, our purpose was to investigate effect of oxidative stress composing in isolated rats on erythrocyte deformability and antioxidant system, considering importance of mechanical, and biochemical properties of erythrocytes in efficiency of blood circulation Material and Methods: Fourty Sprague-Dawley rats were divided into two groups according to their ages; where one of them consisted of 2 months old rats and the other 12 months old rats. Then, randomly selected ten rats in each group were isolated separately in a cage and hold 12/12 hour light-dark cycle lasting 21 days. Blood samples were collected at the end of the 21st day, and superoxide dismutasc (SOD), catalasc (CAT) activities and malondialdchydc (MDA) levels were measured spcctrophotometrically. Changes in plasma nitric oxide level were determined by Griess method depending on total nitrite -nitrate. In addition, relative filtration rate (RFR), relative filtration time (RFT) and relative resistance (Rrcl) of the erythrocytes were calculated as the indexes of erythrocyte deformability. Results: The SOD and CAT levels were found significantly lower in both of young and adult isolated rats when compared to the young and adult control groups. The nitric oxide levels were also found significantly lower in the young and adult isolated rats when compared to their control groups. The peroxidation of the lipids were also decreased by social isolation, in the erythrocyte membrane of both young and adult isolated rats compared to the controls. The indexes of erythrocyte deformability, RFR was found significantly higher, whereas the RFT was significantly lower in young and adult isolated rats compared to the young and adult controls. However, the Rrel of the erythrocytes were not altered dramatically. Conclusion: As a consequence, our data reveals that the social isolation causes a lack of plasma nitric oxide levels in the socially isolated rats and probably due to this decrease in one of the major oxidants for the erythrocyte membrane results in the decreased lipid peroxidation. Furthermore, our results reveal that the social isolation stress causes alterations in the antioxidant defense system and these alteration results in the changes in erythrocyte deformability reflecting that some tissue perfusion problems can occur with long term and repeated loneliness and especially in the early stages of the life span.
Zinc Supplementation Improves ZIP14 (SLC39A14) Levels in Cerebral Cortex Suppressed by icv-STZ Injection
(Turkish Neuropsychiatry Assoc-Turk Noropsikiyatri Dernegi, 2024) Baltaci, Saltuk Bugra; Gumus, Haluk; Unal, Omer; Acar, Gozde; Bayiroglu, Aysenur Feyza
Introduction: Metabolic dysfunctions are critical in the pathology of Alzheimer's disease. Impaired zinc homeostasis, in particular, is a significant issue in this disease that has yet to be explained. Gene expression of ZIP14 in brain tissue has been previously reported. But to date, only one study has reported reduced ZIP14 levels in aged brain tissue. We investigated how dietary zinc deprivation and supplementation impact ZIP14 levels in the cerebral cortex in rats with sporadic Alzheimer's disease (sAH) produced by intracerebroventricular streptozotocin (icv-STZ). Impaired zinc homeostasis, in particular, is a significant issue with this condition that has yet to be elucidated. Methods: Animals were divided into 5 groups in equal numbers (n=8): Sham 1 group: icv received artificial cerebrospinal fluid (aCSF); Sham 2 group: retrieved icv aCSF and intraperitoneal (ip) saline, STZ group: received 3 mg/kg icv-STZ; STZ-Zn-Deficient group: received 3 mg/ kg icv-STZ and fed a zinc -deprived diet; STZ-Zn-Supplemented: It received 3 mg/kg icv-STZ and ip zinc sulfate (5 mg/kg/day ZIP 14 levels (ng/L) in cortex tissue samples taken from animals sacrificed under general anesthesia were determined by ELISA at the final stage of the experimental applications. Results: Decreased ZIP14 levels in the sporadic Alzheimer's group were severely by zinc deficiency. Zinc supplementation treated the reduction in ZIP14 levels. Conclusion: The results of the current study show that ZIP14 levels in cerebral cortex tissue, which are suppressed in the experimental rat Alzheimer model and are even more critically reduced in zinc deficiency, can be restored by zinc supplementation.
Hippocampal ZnT3 (SLC30A3) Levels Reflect Hippocampal Tissue Damage in Chronic Exercising Diabetic Rats
(Pera Yayincilik Hizmetleri, 2024) Baltacı, Abdulkerim Kasım; Yaslı, Mehmet; Baltacı, Saltuk Buğra; Moğulkoç, Rasim; Menevşe, Esma; Ünal, Ömer
Objective: In this study, it was investigated how chronic exercise affects hippocampus tissue damage and ZnT3 levels in diabetic rats. Methods: The 40 adult rats were used in the study were divided into 4 equal groups: Control (G1), Exercise Control (G2), Diabetes (G3), Diabetes+Exercise (G4). Diabetes was induced in animals in G3 and G4 by injecting intraperitoneal streptozotocin (STZ) twice, 24 hours apart. The animals in G2 and G4 were runed on the rat treadmill for 45 minutes daily for 4 weeks. MDA (spectrophotometric method) and ZnT3 (ELISA method) levels were determined in hippocampus tissue samples obtained from animals sacrificed at the end of the experimental procedures.Results: In the current study, the highest MDA and lowest ZnT3 levels in the hippocampus tissue were obtained in the diabetes group (G3) (P<0.05). Chronic exercise prevented increased hippocampal tissue damage in diabetic rats and reversed decreased ZnT3 levels (P<0.05). Conclusion: The results of our study showed that 4 weeks of chronic exercise could be prevent increased tissue damage in the hippocampus tissue of diabetic rats and ameliorate the decreased ZnT3 levels. The data obtained in this study indicate that ZnT3 levels in diabetic rats may be an indicator of hippocampal tissue damage.
Plasma Leptin, Nesfatin 1, NPY, and Zinc Levels in Obese and Metabolic Syndrome Children
(Pera Yayincilik Hizmetleri, 2023) Aydoğdu, Adnan; Ünal, Ömer; Baltacı, Saltuk Buğra; Menevşe, Esma; Moğulkoç, Rasim; Erdem, Said Sami; Büyükinan, Muammer
Objective: The aim of this study is to investigate the relationship between leptin, nesfatin 1 and NPY hormones and zinc in boys and girls diagnosed with metabolic syndrome and obesity. Methods: This study included a total of 6 groups. Group 1 Boy Control, Group 2 Girl Control, Group 3 Obese Boys, Group 4 Obese Girls, Group 5 Boys with Metabolic Syndrome, Group 2 with Girls with Metabolic Syndrome. Plasma leptin, nesfatin-1, NPY (by ELISA method) and serum zinc (by AA method) levels were determined in blood samples obtained from the subjects. Results: Leptin and zinc levels were significantly higher both in boy and girl patients with metabolic syndrome than in obese and control children. Nesfatin-1 and NPY levels were significantly lower both in girl and boy obese and metabolic syndrome children compared to their control groups. Conclusion: In the current study a significant increase in plasma leptin and serum zinc levels and a significant decrease of plasma nesfatin-1 and NPY levels were observed in boys and girls with metabolic syndrome. The findings of our study show that leptin, nesfatin-1 and NPY levels may be important biomarkers in the assessment of metabolic syndrome risk in both girls and boys.
Effects of Pinealectomy and Melatonin Application on Serum Melatonin, Nesfatin-1 and Ghrelin Levels
(Pera Yayincilik Hizmetleri, 2023) Sönmez, Saadet; Menevşe, Esma; Baltacı, Saltuk Buğra; Ünal, Ömer; Moğulkoç, Rasim; Baltaci, Abdulkerim Kasım
Objective: In this study, it was aimed to investigate the relationship between the pineal gland and ghrelin and nesfatin-1 hormones in rats. Methods: A total of 36 male rats were used in the study, and the animals were divided into 4 groups. Group 1, Control; Group 2, Pinealectomy (Px); Group 3, Px+Melatonin; Group 4 Melatonin. After the end of the experimental applications, melatonin, ghrelin and nesfatin-1 levels (ELISA) were determined in the blood samples taken from the animals. Results: While pinealectomy resulted in suppression of melatonin levels, melatonin supplementation led to a significant increase in blood melatonin levels (p<0.01). Melatonin supplementation suppressed ghrelin levels, while pinealectomy increased ghrelin levels (P<0.01). On the other hand, Nesfatin-1 levels, which increased with melatonin support, were significantly suppressed by pinealectomy (p<0.01). Conclusion: The findings of the study draw attention to an important relationship between the endocrine activity of the pineal gland and the hormones ghrelin and nesfatin-1, which play a critical role in nutrition. Consequently, administration of melatonin inhibits ghrelin but increases nesfatin-1.
The Effect of Resveratrol Administration on Element Metabolism in Bone Tissue of Acute Swimming Exercised Rats
(Galenos Publ House, 2023) Arslangil, Dilek; Baltacı, Saltuk Buğra; Ünal, Ömer
BACKGROUND/AIMS: In this study, we investigated how acute exercise affects bone element levels in resveratrol supplemented rats. MATERIAL AND METHODS: The rats used in the study were divided into 4 groups with equal numbers (7 animals in each group). Control (group 1), swimming control (group 2), resveratrol (group 3), resveratrol + swimming (group 4). At the end of the four-week application, the animals were sacrificed under general anesthesia and bone tissue samples were removed. Zinc, magnesium, copper, iron, lead, cobalt, molybdenum, chromium, manganese, phosphorus, calcium and selenium levels were determined in bone tissue samples taken. RESULTS: The bone zinc, iron, calcium, phosphorus, magnesium and boron levels of group 3 who received resveratrol supplementation were higher than all other groups (p<0.05). The lowest magnesium, calcium, and phosphorus values were obtained in the swimming groups (groups 2 and 4) (p<0.05). The levels of other measured elements did not differ between the groups. CONCLUSION: According to the findings of this study: 1) Both resveratrol supplementation and acute swimming exercise cause changes in bone element metabolism. 2) Resveratrol supplementation changes bone element levels independent of exercise. 3) Resveratrol supplementation has a protective and/or regulating effect on bone element metabolism.
The Effects of HES 130/0.4 Application on Erythrocyte Deformability in Ureteral Obstructed Rats
(2018) Güneş, Işın; Küçük, Ayşegül; Çomu, Faruk Metin; Şıvgın, Volkan; Alkan, Metin; Arslan, Mustafa; Ünal, Yusuf
Amaç: Plazma genişleticilerinin uygulanması, önemli cerrahi, hemorajik şok ve travmayı içeren çeşitli klinik koşullardaki kritik hastaları yönetmek için çok önemlidir. Bununla birlikte, hidroksietil nişastanın (HES) eritrosit agregasyonu üzerindeki etkileri tartışmalıdır. Bu nedenle, deneysel tek taraflı üreteral tıkanıklık ile oluşturulan böbrek yetmezliğinde HES 130/0.4'ün eritrosit deformabilitesi üzerindeki etkilerini araştırmayı amaçladık. Yöntem: Toplam 24 rat kontrol, HES 130/0.4, Üreter Obstrüksiyon (ÜO) ve ÜOHES 130/0.4 olmak üzere dört gruba ayrıldı. Üreteral tıkanıklık gruplarına ketamin anestezisi altında düşük abdominal insizyon yapıldı. Sağ üreterin distaline ulaşıldıktan sonra 2.0 mersilen ile bağlandı, daha sonra geç dönemde böbrek yetmezliği için 3 hafta bekledi. 20 mL.kg-1 HES 130/0.4 (Voluven), HES 130/0.4 ve ÜO-HES 130/0.4 grubuna intravenöz olarak verildi. 24 saat sonra ratlar sakrifiye edildi. Deformabilite ölçümleri bir fosfat tamponlu salin (PBS) tamponu içinde% 5 hematokrit kullanılarak gerçekleştirildi. Bulgular: Her grupta rölatif rezistans kontrol grubuna göre arttı (p<0.0001). Her grupta eritrosit deformabilite indeksi kontrol grubuna göre anlamlı derecede yüksek bulundu (Grup K-Grup HES, p=0.023, Grup K-Grup ÜO, p<0.0001, Grup K-Grup ÜO-HES, p<0.0001) . ÜO-HES grubunda HES grubuna kıyasla eritrosit deformabilite indeksi önemli derecede arttı (p=0.031, p=0.021, sırasıyla). HES 130/0.4 uygulaması ile üreteral obstrüksiyon yapılmış sıçanlarda eritrosit deformabilitesinde herhangi bir değişiklik olmadığı belirlendi (p = 0.785). Sonuç: HES 130/0.4 kullanımı, üreteral obstrüksiyonu yapılan sıçanlarda eritrosit deformabilitesi üzerinde olumsuz bir etkiye sahip değildir. HES 130/0.4 kullanırken bu endikasyonların doğru kullanılması gerektiğini düşünüyoruz
Effect of Levosimendan and Nigella Sativa on Erythrocyte Deformability During Myocardial Ischaemia-Reperfusion Injury in Rats
(2018) Özer, Abdullah; Çomu, Faruk Metin; Küçük, Ayşegül; Kılıç, Yiğit; Mardin, Barış; Alkan, Metin; Oktar, Gürsel Levent
Amaç: İskemi-reperfüzyon (İR) hasarı, doku iskemisi sonucu gerçekleşen bir olaylar zinciridir. Hücresel hasarı takiben reperfüzyon, aktif bir inflamatuar yanıta neden olur. Eritrosit deformabilitesi ve plazma viskozitesi doku ve organ perfüzyonunda kritik bir rol oynar. Bu çalışmada, ratlarda miyokardiyal İR hasarı sırasında levosimendan ve nigella sativa'nın eritrosit deformabilitesi üzerine etkisini araştırmayı amaçladık. Yöntem: Yirmi dört adet Wistar albino rat çalışmaya dahil edildi. Hayvanlar rastgele dört deney grubuna ayrıldı. Grup K'daki (kontrol grubu) ratların koroner arterlerine oklüzyon veya reperfüzyon yapılmadı. Miyokardiyal İR, sol ön inen koroner arterin 30 dakika süreyle bağlanması, ardından İR (İR), İR-levosimendan (24 µg/kg) (İRL) ve İR-nigella sativa (0.2 mL/kg) (İRNS) gruplarında 2 saat reperfüzyon ile gerçekleştirildi. Deformabiliteyi ölçmek için% 5 htc içeren bir PBS tampon çözeltisi ile oluşturulan eritrosit süspansiyonları kullanıldı. Bulgular: Sonuç olarak, kontrol grubuna kıyasla İR, eritrosit deformabilitesinin bir belirteci olan nispi direnci artırdı (p<0.05). Gruplar arasında ANOVA testi ile yapılan karşılaştırmalara göre anlamlı fark vardı (p<0.0001). Bonferroni testi ile yapılan düzeltmelerden sonra elde edilen sonuçlar şu şekildedir: İRL ve İRNS gruplarının karşılaştırmaları benzer sonuçlar vermiştir (p=0.764). İR grubunun değerleri kontrol, İRNS ve İRL gruplarından anlamlı derecede yüksekti (sırasıyla p<0.0001, p=0.001, p=0.003). Sonuç: İskemi reperfüzyon hasarı olan ratlarda eritrosit deformabilitesi azaldı. Bu yaralanma mikrodolaşımda daha fazla sorun yaratabilir. Levosimendan ve nigella sativa, bu tip yaralanmaların olumsuz etkilerini azaltmada yararlı olabilir
Investigation of the Effects of Sevoflurane and Desflurane on Erythrocyte Deformability in Transient Hyperglycemia
(2018) Kalaycı, Dilek; Arpacı, Ayşe Hande; Çomu, Faruk Metin; Güneş, Işın; Beşkardeş, Elif; Kurtipek, Ömer; Arslan, Mustafa
Aim: Micro and macrovascular complications due to long-term hyperglycemia are associated with increased mortality and morbidity. Erythrocytes exposed to hyperglycemia for a long time may cause morphological changes in erythrocytes such as decreased deformability and development of aggregation. As a result, complications such as shortening life span of erythrocytes, impairment of oxygen carrying capacity, tissue hypoxia may occur. In our study, we would like to investigate the effects of Sevoflurane and Desflurane on erythrocyte deformability during transient hyperglycemia. Materials and Methods: In this study, 30 male Wistar albino rats were used. The animals were randomly divided into five groups, each contained 6 rats: Diabetic control (group DC), diabetic hyperglycemia group (group DH), diabetic hyperglycemia group with desflurane (group DH-D), and diabetic hyperglycemia group with sevoflurane (group DH-S) groups. Another 6 rats without diabetes were assigned as control group (group C). Streptozotocin- induced diabetic rats were kept 6 weeks, then transient hyperglycemia was created, and the administration of sevoflurane and desflurane were performed. After 24 hours blood samples were obtained and deformability measurements were performed in erythrocyte suspensions containing Htc 5% in a PBS buffer. Results: Diabetes mellitus was found to increase relative resistance in the control group (p <0.0001). Acute hyperglycemia increased relative resistance in diabetes control, relatively. Group DH, Group DH-D and Group DH-S deformability index were significantly different when compared to Group DC (p=0.007, p=0.025, p=0.016, respectively). It was found that administration of desflurane or sevoflurane did not alter erythrocyte deformability during acute hyperglycemia (p = 0.591, p = 0.739). Conclusion: As a consequence, we think that we can safely use inhalation anesthetics such as Desflurane and Sevoflurane during acute hyperglycemia attacks. But, it needs further investigation as both experimental and clinical
The Effect of Picroside-2 on Erythrocyte Deformability and Lipid Peroxidation in StreptozotocinInduced Diabetic Rats Subjected to Left Anterior Descending Artery-Ischaemia Reperfusion
(2017) Çomu, Faruk Metin; Polat, Yücel; Özer, Abdullah; Erer, Dilek; Kirişçi, Mehmet; Dursun, Ali Doğan; Tatar, Tolga
Aim: Diabetes mellitus (DM) is a chronic metabolic disorder principally characterized by an elevation in oxidative stress levels. Ischaemia-reperfusion (IR) injury starts a cascade of events that lead to tissue ischaemia and cellular damage produced by reperfusion causing an inflammatory like response. Erythrocyte deformability and plasma viscosity are important clinical implications for organ and tissue perfusion. Recent studies have found that picroside-2 has antioxidant, neuroprotective and anti-inflamatory effects. The aim of our study was to investigate the effects of picroside-2 on erythrocyte deformability and lipid peroxidation in streptozotocin-induced diabetic rats subjected to left anterior descending (LAD) artery IR. Methods: The animals were randomly assigned to one of five experimental groups. In Group (control) C, DC (diabetes-control group), and DP (diabetespicroside-2 group) neither coronary artery occlusion nor reperfusion were performed in the control rats. In Group DIR, a branch of the LAD artery was occluded for 45 minutes followed by 90 minutes of reperfusion to produce IR. In Group DIRP, picroside-2 was administrated via 10 mg.kg-1 inraperitoneal (IP) route 30 minutes before ligating the LAD artery. Serum malondialdehyde and nitric oxide activities were investigated to document lipid peroxidation and erythrocyte deformability index. Results: Deformability index was notably increased in diabetic rats (p<0.0001). It was notably increased in Group DIR when compared to Group C, DC, DP and DIRP (p<0.0001, p=0.009, p=0.013, p=0.009, respectively). MDA level and NO activity were also higher in IR group than the other groups. Conclusion: Erythrocyte deformability index was decreased in rats with diabetes and IR injury. This injury may lead to further microcirculatory problems. Picroside 2 was shown to be useful in reducing the side effects of this kind of injury.
Trpv2 Polymorphisms Change The Risk Of Type 2 Diabetes - Hashimoto Thyroiditis Comorbidity
(EDITURA ACAD ROMANE, 2020) Arikan, F. Bulut; Ozdemir, F. A.; Sen, D.; Erdem, S.; Yorubulut, S.; Dogan, H.; Keskin, L.
Context. Thyroid disorders are common in diabetics and related to severe diabetic complications. TRPV2 ion channels have crucial functions in insulin secretion and glucose metabolism which have an important role in the pathophysiology of diabetes. Also, they have a significant effect on various immunological events that are involved in the HT pathophysiology. Objective. This study aimed to investigate rs14039 and rs4792742 polymorphisms of the TRPV2 ion channels in type 2 diabetes mellitus (T2DM, n=100) Hashimoto thyroiditis (HT, n=70) and comorbid T2DM and HT (T2DM+HT, n=100) patients and control (n=100). Design. Case-control study Subject and Methods. RT-PCR genotyping was used to determine rs14039 and rs4792742 polymorphisms with DNA samples of subjects and appropriate primer and probes. Besides, required biochemical analyses were performed. Results. It was determined that the frequencies of the rs14039 GG homozygote polymorphic genotype and the G allele were significantly higher in T2DM+HT patients compared to the control (p=0.03 and p=0.01, respectively) and that especially the GG genotype increases the risk of T2DM+HT 3.046-fold (p=0.01, OR=3.046). It was detected that the GG genotype increased the risk of HT 2.54-fold (p=0.05, OR=2.541). TRPV2 rs4792742 polymorphisms reduce the risk of HT and T2DM+HT comorbidity almost by half and have a protective effect against HT and T2DM+HT. Conclusion. The rs14039 GG genotype of the TRPV2 gene significantly increases the risks of development of T2DM+HT and HT disorders, may have a significant role in the pathophysiology of these diseases, also leading to predisposition for their development. Conversely, rs4792742 polymorphic genotypes have a strong protective effect against the HT and T2DM+HT comorbidity.
Effects of N-Acetylcysteine and N-Acetylcysteine Amide on Erythrocyte Deformability and Oxidative Stress in a Rat Model of Lower Extremity Ischemia-Reperfusion Injury
(HINDAWI LTD, 2020) Erol, Gokhan; Kartal, Hakan; Comu, Faruk M.; Cetin, Erdem; Demirdas, Ertan; Sicim, Huseyin; Unal, Celal S.
N-acetylcysteine (NAC) is an antioxidant which works as a free radical scavenger and antiapoptotic agent. N-acetylcysteine-amide (NACA) is a modified form of NAC containing an amide group instead of a carboxyl group of NAC. Our study aims to investigate the effectiveness of these two substances on erythrocyte deformability and oxidative stress in muscle tissue.Materials and Methods. A total of 24 Wistar albino rats were used in our study. The animals were randomly divided into five groups as control (n: 6), ischemia (n: 6), NAC (n: 6), and NACA (n: 6). In the ischemia, NAC, and NACA groups, 120 min of ischemia and 120 min of reperfusion were achieved by placing nontraumatic vascular clamps across the abdominal aorta. The NAC and NACA groups were administered an injection 30 min before ischemia (100 mg/kg NAC; 100 mg/kg NACA; intravenous). Blood samples were taken from the animals at the end of the ischemic period. The lower extremity gastrocnemius muscle was isolated and stored at -80 degrees to assess the total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) values and was analyzed.Results. The erythrocyte deformability index was found to be statistically significantly lower in rats treated with NAC and NACA before ischemia-reperfusion compared to the groups that received only ischemia-reperfusion. In addition, no statistically significant difference was found between the control group and the NAC and NACA groups. The groups receiving NAC and NACA before ischemia exhibited higher total antioxidative status and lower total oxidative status while the oxidative stress index was also lower.Conclusion. The results of our study demonstrated the protective effects of NAC and NACA on erythrocyte deformability and oxidative damage in skeletal muscle in lower extremity ischemia-reperfusion. NAC and NACA exhibited similar protective effects on oxidative damage and erythrocyte deformability.

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