نتایج جستجو برای: gstp1
تعداد نتایج: 1356 فیلتر نتایج به سال:
مقدمه: سرطان پستان یکی از شایع ترین سرطانهای شناخته شده زنان در تمام گروه های نژادی است. تحقیق درباره فاکتورهای محیطی و ژنتیکی که منجر به سرطان پستان می شوند فرصت جدیدی برای درک ریسک سرطان پستان در اختیار ما قرار می دهد. از جمله این عوامل ژنتیکی گلوتاتیون s- ترانسفراز است که یک سوپرژن با اعمال متنوع سم زدایی بوده و کارسینوژن ها را کاتالیز می کند. مواد و روش ها: این مطالعه به صورت Case-C...
Glutathione S-transferase P1 (GSTP1) is a critical enzyme in the phase II detoxification pathway. One of the common functional polymorphisms of GSTP1 is A→G at nucleotide 313, which results in an amino acid substitution (Ile105Val) at the substrate binding site and reduced catalytic activity. We evaluated the interaction between GSTP1 Val allele and Helicobacter pylori infection, smoking and al...
BACKGROUND Anti-tuberculosis (anti-TB) drug-induced liver injury (ADLI) is one of the most common adverse effects associated with TB treatment. Cytochrome P450 (CYP) 1A1 and glutathione S-transferase (GST) P1 are important phase I/II metabolizing enzymes involved in drug metabolism and detoxification. Genetic polymorphism and CpG island methylation have been reported as factors influencing the ...
The steric conversion of 13-cis-retinoic acid (13-cRA) to all-trans-retinoic acid (t-RA) has been proposed as an activation mechanism for the observed therapeutic and teratogenic activities of 13-cRA. Here we have investigated the catalysis of isomerization of 13-cRA to t-RA by recombinant human glutathione S-transferases (GSTs). Substrate was incubated with GST in 0.1 M sodium phosphate buffer...
BACKGROUND Glutathione transferases (GST) detoxify environmental and endogenous compounds and levels of two polymorphic GST proteins, GSTM3 and GSTP1, are high in the brain. Previous studies of GSTM3 and GSTP1 polymorphisms and adult brain tumor risk have produced inconsistent results, whereas the GSTM3 -63 variant is newly identified and, therefore, has not yet been studied in this context. We...
GSTP1 and GSTM1 are genes involved in Phase II metabolism, whereas p53 is a tumor suppressor gene. Individually, functional polymorphisms of these genes have been studied as risk factors for lung cancer. Small sample sizes have hindered the detection of possible increases in risk associated with having two or more "at risk" polymorphisms of these three genes. In a large Caucasian population, we...
Glutathione S-transferase Pi (GSTP) detoxifies electrophiles by catalyzing their conjugation with reduced glutathione. A second function of this protein in cell defense has recently been proposed that is related to its ability to interact with c-Jun N-terminal kinase (JNK). The present study aimed to determine whether this interaction results in increased constitutive JNK activity in the absenc...
Among the many somatic genome alterations present in cancer cells, changes in DNA methylation may represent reversible "epigenetic" lesions, rather than irreversible "genetic" alterations. Cancer cell DNA is typically characterized by increases in the methylation of CpG dinucleotides clustered into CpG islands, near the transcriptional regulatory regions of critical genes, and by an overall red...
زمینه و هدف: لیومیوم های رحمی شایع ترین تومور خوش خیم رحمی در زنان می باشد که تقریبا 40-20 درصد زنان در سن باروری به این بیماری مبتلا می باشند. استروژن نقش مهمی در پاتوژنز لیومیوما ایفا می کند. از جمله ژن های درگیر در بیوسنتز استروژن گلوتاتیون s- ترانسفراز می باشد. هدف از این مطالعه بررسی ارتباط میان پلی مورفیسم gstp1 ile105val و خطر ابتلا به لیومیوم رحمی در جمعیت ایرانی بود. روش بررسی: این مطا...
The present study examines the expression of p63, glutathione S-transferase-pi (GSTP1) and alpha-methylacyl-CoAracemase (AMACR) in serial slices in proliferative inflammatory atrophy (PIA) in order to implicate that some of the basal cells are probably the putative human prostate carcinoma stem cells (PHPCSC). Archived tissue sections obtained after radical prostatectomy from cases (n=30) compr...
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