Browsing by Author "Acikgoz E."

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Comparison of nephron-protective effects of enalapril and glp analogues (exenatide) in diabetic nephropathy
    (Georg Thieme Verlag, 2014) Çavusoglu T.; Erbas O.; Karadeniz T.; Akdemir O.; Acikgoz E.; Karadeniz M.; Tuglu M.I.; Ates U.
    Background: One of the major concerns is a nephropathy in diabetes, which applies many different kinds of medicines. However, required level of the treatment of renal disease has not been achieved. Aim: To investigate and compare the effect of the enalapril and the exenatide on diabetic nephropathy in rats developed diabetes by streptozosin. Material and Methods: 32 male Sprague Dawley rats were divided into 4 groups: (1) Control, (2) Diabetic (DM), (3) DM+ Enalapril, and (4) DM+ exenatide groups. Then, the animals were euthanized and their blood samples were collected by cardiac puncture for blood glucose; blood urea nitrogen (BUN), creatinin, and nephrectomy were performed for histopathologic examination, and urine samples were taken on stick for proteinuria. Results: Administration of the enalapril or the exenatide in diabetic rats resulted in a significant reduction both fibronectin, induced nitric oxide synthase (i-NOS) expression in glomerular area and urine protein levels. It was shown that both of enalapril and exenatide protected the renal glomerulus more than diabetic group in the nephropathy histopathologically. Conclusion: The beneficial effects of enalapril and exenatide which reduces fibronectin, i-NOS expression and urine protein levels or increases recovery of glomerules, might be used for preventing the harmful effects of diabetic nephropathy. © 2014 Georg Thieme Verlag KG Stuttgart New York.
  • No Thumbnail Available
    Item
    The Protective Effect of Losartan on Diabetic Neuropathy in a Diabetic Rat Model
    (Georg Thieme Verlag, 2015) Cavusoglu T.; Karadeniz T.; Cagiltay E.; Karadeniz M.; Yigitturk G.; Acikgoz E.; Uyanikgil Y.; Ates U.; Tuglu M.I.; Erbas O.
    Aim: Involvement of the peripheral and autonomic nervous systems is possibly the most frequent complication of diabetes. Important risk factors included hyperglycemia, dyslipidemia, hypertension, and smoking. Angiotensin-converting-enzyme inhibitor (ACE) inhibitors should be beneficial in all vascular beds, including neuropathy and retinopathy. In this study we aimed to evaluate the effect of the angiotensin receptor blocker losartan on diabetic neuropathy in a diabetic rat model. Material and Methods: 24 male, Sprague Dawley albino mature rats were divided into 3 groups; (1) control group: No drug was administered to the remainder of rats which blood glucose levels were under 120mg/dl, (2) diabetic control: rats were given no medication, but 4ml per day of tap water was given by oral gavage, (3) losartan groups: rats were given 10mg/kg/day oral of losartan for 4 weeks. Electromyography (EMG) was applied to anesthetized rats at the end of 4th weekend. Then, the animals were euthanized and sciatic nerve was performed for histopathological examination. Results: Compound Muscle Action Potential (CMAP) amplitude of diabetic rats receiving the Saline in the EMG was significantly reduced when compared to the control group. Distal latency value and CMAP duration of diabetic rats receiving the saline were meaningfully increased when compared to the control group. CMAP amplitude and CMAP duration of diabetic rats receiving the Losartan treatment in the EMG were meaningfully reduced when compared to diabetic rats receiving the Saline. Perineural thickness in the rats receiving the Losartan treatment was found to be significantly reduced when compared to the group receiving the Saline. Conclusions: As a result, it has been shown in this study that perineural thickness of the Losartan treatment was significantly reduced when compared to saline receiving group, significantly increased the immunoexpression of NGF, and also provided a significantly recovery in EMG when compared to Saline receiving group. © J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart, New York.
  • No Thumbnail Available
    Item
    JAK/STAT pathway interacts with intercellular cell adhesion molecule (ICAM) and vascular cell adhesion molecule (VCAM) while prostate cancer stem cells form tumor spheroids
    (Zerbinis Publications, 2015) Duzagac F.; Inan S.; Simsek F.E.; Acikgoz E.; Guven U.; Khan S.A.; Rouhrazi H.; Oltulu F.; Aktug H.; Erol A.; Oktem G.
    Purpose: JAK/STAT is an evolutionarily conserved pathway and very important for second messenger system. This pathway is important in malignant transformation and accumulated evidence indicates that this pathway is involved in tumorigenesis and progression of several cancers. It was possible to assume that activation of JAK/STAT pathway is associated with increase in the expressions of ICAM-1 and VCAM-1. In this study we hypothesized that when cells were maintained as spheroids or monolayers, the structure of cancer stem cells (CSCs) could show differentiation when compared with non-CSCs. Methods: DU-145 human prostate cancer cells were cultured using the Ege University molecular embryology laboratory medium supplemented with 10% fetal bovine serum. Clusters of differentiation 133 (CD133)(+high)/CD44(+high) prostate CSCs were isolated from the DU145 cell line by using BD FACSAria. CD133+/CD44+ CSCs were cultured until confluent with 3% noble agar. The expression of these proteins in CSCs and non-CSCs was analyzed by immunohistochemistry. Results: Different expression profiles were observed in the conventional two-dimensional (2D) and three-dimensional (3D) experimental model system when CSCs and non-CSCs were compared. Human prostate CSCs exhibited intense ICAM-1 and VCAM-1 immunoreaction when compared with non-CSCs. These findings were supported by the fact that VCAM-1 on the surface of cancer cells binds to its counterreceptor, the a4fil integrin (also known as very-late antigen, VLA-4), on metastasis-associated macrophages, triggering VCAM-1-mediated activation of the phosphoinositide 3-kinase growth and survival pathway in cancer cells. Conclusions: The results of this study showed that changes in JAK/STAT pathway are related with adhesion molecules and could affect cancer progression.