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    A significant association between rs2295190 polymorphism of the ESR1 gene and fibromyalgia syndrome
    (C M B Assoc, 2022) Kaydok, Ercan; Ozmen, Esma; Sari, Ismail; Sen Cakiroglu, Gozde; Tas, Ayca; Silig, Yavuz; Hayta, Emrullah
    Fibromyalgia syndrome (FMS) is a multifactorial disease characterized by chronic diffuse pain. Genetic factors are also involved in the etiology. However, there is not enough information on the genetic factors that play a role in the pathogenesis of FMS. This study aims to investigate the relationship between estrogen receptor 1 gene (ESRI) 594G>A (rs2228480) and 325C>G (rs2295190) polymorphisms and FMS. A total of 294 women, 146 of who were FMS patients and 148 of whom were healthy controls, were enrolled in the study. The instruments used to collect data from patients included patient follow-up forms, Visual Analog Scale (VAS), and Fibromyalgia Impact Questionnaire (FIQ). Genotyping of ESR1 594G>A and 325C>G polymorphisms in the extracted DNA samples was performed using an RT-PCR device and TaqMan hydrolysis probes. it was found that, for rs2295190 polymorphism, patients with CO and GO genotypes versus CC genotypes showed a decreased risk for FMS (OR: 0.442; 95% CI: 0.234-0.833). But there were no significant differences were found in the genotype distribution of rs2228480 polymorphism between the FMS patients and controls. The intragroup evaluation of FMS patients revealed no significant association between symptoms, pain score, FIQ score, and polymorphisms (p>0.05). We believe that there is a significant association between ESR1 rs2295190 polymorphism and FMS and that this polymorphism may be protective against FMS. However, there is a need for comprehensive studies on different populations to obtain clearer data as well as further studies to elucidate the possible mechanism of association. Copyright: (C) 2022 by the C.M.B. Association. All rights reserved.
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    Expression levels of BAP1, OGT, and YY1 genes in patients with eyelid tumors
    (Walter De Gruyter Gmbh, 2021) Tas, Ayca; Gumus, Erkan; Ozmen, Esma; Erdogan, Haydar; Silig, Yavuz
    Objectives The aim of this study was to investigate BAP1, OGT and YY1 genes and protein levels in 12 samples (8 males, 4 females) of eyelid tumor tissue with basal cell carcinoma (BCC) and 12 normal control subjects (8 males, 4 females). Methods The expression levels of these genes were determined with RT-PCR and the protein levels and expression using ELISA and IHC methods, respectively. Results In RT-PCR analysis, statistically significant upregulated expression was determined of 1.84-fold of BAP1, 2.85-fold of OGT and 3.06-fold of YY1 genes (p < 0.05). In the patient group, compared to the control group, there was a similar statistically significant strong correlation between the proteins (BAP1 and YY1; r = 0.850, BAP1 and OGT; r = 0.811, OGT and YY1; r = 0.755) (p < 0.05). In the ELISA and IHC analysis methods, a significant increase in BAP1 and YY1 protein expression levels was observed compared to the control group (p < 0.05). Conclusions The study results demonstrated that BAP1 and YY1 genes and protein levels were upregulated in eyelid tumor tissue with BCC.
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    Potassium Ion Channel Protein (KCNH) Levels in Patients with Fibromyalgia Syndrome
    (C M B Assoc, 2021) Tas, Ayca; Hayta, Emrullah; Karadag, Ahmet; Zontul, Cemile; Ozmen, Esma; Aydin, Suleyman; Silig, Yavuz
    Although there is not yet full clarity of the pathogenesis of fibromyalgia syndrome (FM), central sensitization is considered to be responsible. The purpose of this study was to measure the plasma levels of potassium ion channel proteins (human KCNH2, KCNH6 and KCNH7) in FM patients and healthy control subjects. The study sample includes 76 newly diagnosed FM patients and 79 healthy individuals. Venous blood samples were taken to measure the plasma levels of KCNH2, KCNH6 and KCNH7. Pain severity in FM patients was assessed using a visual analog scale (VAS). Bioinformatics analysis was performed using the STRING v 11 Protein interaction tool. Age, gender and body mass index were seen to be similar in both groups. In comparisons between FM and control groups, KCNH2 plasma levels was found to be significantly lower in the FM group. No significant correlation was found between plasma levels of KCNH2, KCNH6 and KCNH7 protein levels and VAS score of patients with FM. The KCNH2 protein had a high homology score with 9 proteins. The plasma levels of KCNH2 FM patients were found to be lower than those of the healthy control subjects, no difference was determined in respect of the plasma levels of KCNH6 and KCNH7. These results may be of use in guiding future studies on the pathogenesis of FM. Copyright: (c) 2021 by the C.M.B. Association. All rights reserved.
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    Significant association between MDM2 T309G polymorphism and colorectal cancer
    (Imprimatur Publications, 2019) Atabey, Mustafa; Tas, Ayca; Sari, Ismail; Bostanci, Meric Emre; Topcu, Omer; Silig, Yavuz
    Purpose: The Murine double minute 2 (MDM2) gene plays a crucial role in regulating and suppressing the function of apoptotic pathway. We investigated the relationship between MDM2 gene SNP309 (T309G) (rs2279744) polymorphism and colorectal cancer (CRC) in a Turkish population. Methods: The polymorphism T309G (rs2279744) in the MDM2 gene was studied in patients with colorectal cancer (n=135) and healthy control subjects (n=145) using the polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) method The findings were evaluated using logistic regression and x(2) tests. Results: When CRC cases and controls were evaluated based on different habits and family cancer histories, a statistically significant relationship was found between CRC and alcohol consumption (x(2) =4.07, p=0.044). Cancer cases and controls had statistically significant different family histories of cancer (x(2) =6.82, p =0.009). There was also significant difference in TG genotype distribution in the MDM2 T309G polymorphism between those with and without cancer (OR=1.98, 95% CI =1.98-3.91, x(2) =4.00, p =0.045). Conclusions: The SNP309 polymorphism of the MDM2 gene is associated with increased CRC risk in the Turkish population.
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    Significant association of the MDM2 T309G polymorphism with breast cancer risk in a Turkish population
    (Asian Pacific Organization for Cancer Prevention, 2018) Yilmaz, Meral; Tas, Ayca; Donmez, Gonca; Kacan, Turgut; Silig, Yavuz
    Background: Breast cancer is a leading cause of death in women worldwide. Genetic polymorphisms have been reported to be important etiological factors. Murine double minute 2 (MDM2) T309G interacts with p53 and mutations in p53 are present in approximately 50% of all cancers. However, it has been reported that effect of the polymorphism on breast cancer risk may vary in different populations. Here, we therefore investigated whether there is an association between MDM2 T309G (rs2279744) polymorphism and breast cancer in a Turkish population. Materials and Methods: We analysed 110 patients with breast cancer and 138 matched? controls. For genotyping, polymerase chain reaction and restriction length fragment polymorphism methods were used. Results: A significant difference was observed between case and control groups with regard to the distribution of the MDM2 T309G polymorphism (p < 0.05). There was a significantly higher frequency of the TT genotype in the control group (p=0.028; OR, 2.42; 95% CI, 1.09-5.37). However, we did not find any relationships among tumor grade and metastasis status and this polymorphism. Conclusion: This study indicates that the MDM2 T309G polymorphism GG genotype and the TG+GG combination may be risk factors for breast cancer in our Turkish population. © 2017, Asian Pacific Organization for Cancer Prevention.