Yazar "Bayraktar, Recep" seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Do Fasudil and Y-27632 affect the level of transient receptor potential (TRP) gene expressions in breast cancer cell lines?(Springer, 2014) Gogebakan, Bulent; Bayraktar, Recep; Suner, Ali; Balakan, Ozan; Ulasli, Mustafa; Izmirli, Muzeyyen; Oztuzcu, SerdarBreast cancer (BC) is the most frequent cancer type in women, and the mortality rate is high especially in metastatic disease. Ion channels such as the transient receptor potential (TRP) channels correlate with malignant growth and cancer progression. Hence, some authors have suggested that the expression levels of TRP channels may be used as a marker in the diagnosis and predicting the prognosis of BC. Also, in some recent studies, targeting TRP channels are suggested as a novel treatment strategy in BC. The aim of this study was to investigate the effect of two Rho-kinase (ROCK) inhibitors, fasudil and Y-27632, on the expression levels of TRP channel genes in breast cancer cell lines (ZR-75-1, MCF7, and MDA-MB-231) and breast epithelial cell line (hTERT-HME1). The expression levels of TRP genes were determined by quantitative reverse transcription polymerase chain reaction (qRT-PCR). We found that fasudil had reduced the TRPC1, TRPV2 expression levels in the ZR-75-1, MCF7, and MDA-MB-231 cell lines. On the other hand, fasudil and Y-27632 had reduced TRPM6 expression levels in all cell lines. Y-27632 increased the expression levels of TRPC7 in all cell lines. In conclusion, this is the first study demonstrating that the inhibition of ROCK pathway changes the expression levels of some TRP genes. Also, our study has firstly shown that the expression levels of the TRP genes which are suggested as a diagnostic and prognostic biomarker in BC, were changed with the treatment of fasudil and Y-27632.Öğe Effects of dexamethasone and anti-inflammatory drugs on inflammatory cytokines from bronchial epithelial cells of COPD patients(European Respiratory Soc Journals Ltd, 2015) Koc, Ibrahim; Gogebakan, Bulent; Bayraktar, Recep; Tasdemir, Demet; Ozdemir, Ufkun; Adcock, Ian; Bayram, Hasan[Abstract Not Available]Öğe NADPH oxidase P22PHOX gene expression in ulcerative colitis(2014) Bülbül, Neşe; Pala, Elif; İğci, Yusuf Ziya; Göğebakan, Bülent; Öztuzcu, Serdar; Cengiz, Beyhan; Bayraktar, Recep; Dağ, Muhammet Sait; Aydınlı, MusaBackground/Aims: Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase, which catalyzes the formation of reactive oxygen species (ROS) in phagocytic cells, has five subunits: p67phox ("phox"refers to "phagocyte oxidase"), p47phox, p40phox, p22phox, and gp91phox (catalytic subunit). Oxidative stress resulting from the accumulation of ROS and/or defective removal of ROS by antioxidants has detrimental effects on cellular functions and may contribute to chronic inflammation. Disruption of the colonic mucosa due to the dysregulation of antioxidants or transformation enzymes may play a role in the pathogenesis of ulcerative colitis (UC) and influence the clinical features of this disease. In this study, we examined the expression of the gene encoding NADPH oxidase subunit p22phox cytochrome b-245, alphapolypeptidein the colonic mucosa to test its possible contribution in the pathogenesis of UC.Materials and Methods: Expression levels of mRNA in the inflamed and non-inflamed colonic mucosa (determined using colonoscopy)of 22 patients with UC and in the normal mucosa of 22 healthy controls were analyzed using real-time polymerase chain reaction.Results: Expression levels of mRNA were not significantly different between patients with inflamed and non-inflamed colonic mucosa (p>0.05) and betweenpatients with inflamed colonicmucosa and healthy controls (p>0.05). Conclusion: Although our data suggest that expression of the gene encoding p22phox is not associated with chronic inflammation in patients with UC, other mechanisms can affect oxidative stress in these patients.Öğe The role of hepcidin and its related genes (BMP6, GDF-15, and HJV) in rats exposed to ischemia and reperfusion(2014) Dokuyucu, Recep; Demir, Tuncer; Yumrutaş, Önder; Erbağcı, Ayşe Binnur; Örkmez, Mustafa; Bahar, Abdulkadir Yasir; Bayraktar, Recep; Bozgeyik, İbrahim; Kaplan, Davut Sinan; Cengiz, Beyhan; Bağcı, CahitBackground/aim: To determine the roles of hepcidin and its related genes in a renal ischemia/reperfusion model. Materials and methods: A total of 20 Wistar albino rats were equally divided into 2 groups: Group I was the control group and Group II was the ischemia and reperfusion (I/R) group (60 min of ischemia + 48 h of reperfusion). I/R was performed on the left kidneys of these rats and then the I/R-treated kidneys were removed. The levels of serum biochemical markers were evaluated after renal I/R. The expression levels of hepcidin-linked genes [growth differentiation factor 15 (GDF-15), bone morphogenetic protein 6 (BMP6), and hemojuvelin (HJV)] were also measured by RT-PCR technique. In addition, the tissues were evaluated histopathologically. Results: No significant association was found between renal dysfunction and I/R when compared to biochemical parameters (P > 0.05). However, differences in platelet values were statistically significant (P < 0.05). Expression levels of GDF-15, BMP6, and HJV genes increased, but this increase was not statistically significant. In addition, histopathological evaluation was performed using hematoxylin and eosin stain. This showed a significant relationship between the control group and I/R group for ischemic and nonischemic kidney scoring. Conclusion: Hepcidin and BMP6, HJV, and GDF-15 should be taken into account when investigating the process of I/R.
