dna methylation plays an important role in carcinogenesis through epigenetic silencing of tumor suppressor genes. aberrant methylation usually results from changes in the activity of dna methyltransferases (dnmts). some studies show that the overexpression of the dnmts may lead to aberrant methylation of tumor suppressor genes. also the overexpression of dnmts may be related to methylation stat...

Air-type photovoltaic thermal (PV/T) collectors have a lower heat recovery rate than liquid-type collectors. Therefore, in this study, semicircular turbulence promoters were attached to the back of PV cell improve rate. Based on computational fluid dynamics, heat-transfer performance and pressure drop evaluated by changing Reynolds number (Re) promoter shape conditions. The conditions include r...

E-cadherin is among tumor suppressor genes which mostly subjects to the down-regulation in squamous cell carcinoma of esophagus (SCCE). The gene is tightly associated with the tumor invasion and metastasis in multiple human cancers, especially SCCE. CpG islands’ methylation in the promoter region of E-cadherin is among the mechanisms that have been suggested for the E-cadherin silencing, howeve...

background: hepatitis b virus (hbv) infection is the most common cause of end-stage liver disease in iran. more than 70% of cases are negative for the hepatitis b e antigen (hbeag) and have a long-term response to antiviral therapy, as well as a high relapse rate after discontinuing lamivudine or interferon. these features could be due, in part, to genetic variation of the hbv genome. materials...

conclusions some il-10 promoter gene polymorphisms predisposed the infected hepatitis b virus cases to cirrhosis in our study population. patients and methods totally, 166 patients with chronic hepatitis b infection were enrolled. genotypes at different positions (i.e. -819, - 592, and - 1082) in the il-10 gene promoter were determined. results the c/a genotype at position -592, c/t genotype at...

objectives this study evaluates the correlation between hbv infection and snp in il-10 gene promoter. patients and methods ninety-six hbv-infected patients (32 chronic hepatitis b infection patients, 34 healthy carriers, 30 spontaneously recovered cases) and 31 healthy controls were enrolled. three biallelic (-819,-592,-1082) regions in the il-10 gene promoter were sequenced for all patients. r...

Background and Objective: The DBC2 (deleted in breast cancer 2) or RhoBTB2 (Located on 8p21) is a tumor suppressor gene associated with tumorigenesis. Mutational studies of DBC2 at its promoter region in breast cancer revealed an important role for epigenetic changes contributing to its low expression. Epigenetic changes through hypermethylation of the promoter can cause the inactivation of DBC...

CSN1S1is one of the major genes encoding milk proteins of mammals. In this study we determined allele frequencies of CSN1S1-5` flanking region as well as exon 17 variants and their effects on milk traits in three indigenous cattle breeds Mazandarani, Golpaygani (Bos indicus) and Sarabi (Bos taurus) and Holstein cattle in Iran. CSN1S1*B variant was nearly fixed in Holstein but ranged from 0.40 t...