نتایج جستجو برای: methylation gstm1
تعداد نتایج: 49137 فیلتر نتایج به سال:
BACKGROUND Gastric and colorectal cancers remain the major causes of cancer-related death. Although chemotherapy improves the prognosis of the patients with gastrointestinal cancers, some patients do not benefit from therapy and are exposed to the adverse effects. The polymorphisms in genes including GSTM1 and GSTT1 have been explored to predict therapeutic efficacy; however, the results were i...
Pooled analysis and meta-analysis of glutathione S-transferase M1 and bladder cancer: a HuGE review.
Smoking is a known risk factor for bladder cancer. The product of the GSTM1 gene, glutathione S-transferase M1 (GSTM1), is involved in the detoxification of polycyclic aromatic hydrocarbons found in tobacco smoke; a homozygous deletion of this gene in approximately 50% of Caucasians and Asians results in a lack of GSTM1 enzyme activity. Most studies examining the relation between bladder cancer...
Investigations of the ability of polymorphisms in the GSTM1, GSTT1, and GSTP1 genes to alter susceptibility to head and neck squamous cell carcinoma (HNSCC) have examined gene-environment interaction in their detoxification of tobacco-associated carcinogens. Little work has been done to ask if these variant genes also modify the interaction of tobacco and alcohol in the development of HNSCC. To...
BACKGROUND The enzymes encoded by the glutathione S-transferase mu 1 (GSTM1) and theta 1 (GSTT1) genes are involved in the metabolism (mainly inactivation, but activation is possible) of a wide range of carcinogens that are ubiquitous in the environment; the enzyme encoded by the GSTT1 gene may also be active in endogenous mutagenic processes. Homozygous deletions of the GSTM1 and GSTT1 genes a...
Oxidative stress is associated with osteoporosis. The glutathione S-transferases form the major detoxifying group of enzymes responsible for eliminating products of oxidative stress. We have therefore proposed GSTM1 and GSTT1 genes as candidates for studying the genetics of osteoporosis. The aim of the present study was to examine possible association of GSTM1 and GSTT1 gene deletion polymorphi...
Introduction: Breast cancer is a common disease diagnosed in Mexican women and the first leading cause of death [1]. Heterogeneity in patients’ response to treatment is consistently observed across populations. Glutathione S-transferases (GSTs) are involved in the metabolism of environmental carcinogens, reactive oxygen species and chemotherapeutic agents by catalyzing the glutathione with elec...
مقدمه: خانواده ژنی گلوتاتیون اس– ترانسفراز (gst) از آنزیم های متابولیکی مهم در سم زدایی مواد جهش زا و حذف کارسینوژنها می باشد. فقدان آللی ژنهای gstمی تواند در جمعیت های مختلف با افزایش خطر انواع سرطان به خصوص مرتبط با مصرف سیگار همراه باشد. هدف از این مطالعه، تعیین میزان فقدان ژنهای gstt1 و gstm1 در افراد سالم و بیماران مبتلا به سرطان ریه و تعیین رابطه آن با افزایش خطر ابتلا به سرطان ریه می باش...
OBJECTIVE To examine the effects of GSTM1 null-allele polymorphism on oxidative stress and disease progression in HIV infected and HIV/hepatitis C (HCV) co-infected adults. METHODS HIV-infected and HIV/HCV co-infected participants aged 40-60 years old with CD4 cell count >350 cells/ µl, were recruited. GSTM1 genotype was determined by quantitative PCR. Oxidative stress (mitochondrial 8-oxo-2'...
Glutathione S-transferase (GST), a member of the phase II group of xenobiotic metabolizing enzymes, has been intensively studied at the levels of phenotype and genotype. The GST mu 1 (GSTM1) and GST theta 1 (GSTT1) genes have a null-allele variant in which the entire gene is absent. The null genotype for both enzymes has been associated with many different types of tumors. The aim of this study...
Background and Aims: Smoking has an influence on different semen parameters. It is regarded as a risk factor for infertility. This study aims to evaluate the effect of smoking cigarettes on the expression of nuclear factor erythroid 2-related factor 2 (NRF2) and glutathione S-transferase Mu 1 (GSTM1) genes and biomarkers of oxidative stress in sperm. Materials and Methods: A case-control study...
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