background: to evaluate vdr gene variation and its interaction with immune regulatory molecules in osteoporosis. methods: totally 205 pre and postmenopausal women were recruited in the study. after an overnight fast, peripheral blood was taken and centrifuged to sprat serum for measurement of serum parathyroid hormone, 25 hydroxyvitamin d, osteocal­cin and cross laps. the fok i polymorphism in ...

collection of multiple processes that increase the chronological age of an organism leading to death is defined as aging, and even though important, it is poorly understood. recent research has shown that aging is due to biochemical and genetic changes, in interaction with environmental effects, including diet and nutrition. most knowledge on aging is based on ge­netic model system, but its mol...

background: prostate cancer is one of the most widespread cancers in men and is fundamentally a genetic disease. identifying regulators in cancer using novel systems biology approaches will potentially lead to new insight into this disease. it was sought to address this by inferring gene regulatory networks (grns). moreover, dynamical analysis of grns can explain how regulators change among dif...

asthma is a chronic inflammatory disorder of the airways. the stress is a factor for asthma which indicates a disorder in the function of communicational mediators of nervous and  immunological systems  such  as  neurotransmitters.  a  study  indicated  that  blood serotonin concentration increases in asthmatic patients. other study indicates that one kind of the serotonin  receptors, named 5ht...

background : colorectal cancer is the second cause of mortality in developed countries. the p53gene and some of it's polymorphisms are among the causes for cancer development.the purpose of this study is to evaluate the relationship between the p53 codon 72 polymorphism in colorectal adenocarcinoma specimens compared with controls. materials and methods : we performed a case-control study among...

an important step in considering of gene expression data is obtained groups of genes that have similarity patterns. biclustering methods was recently introduced for discovering subsets of genes that have coherent values across a subset of conditions. the las algorithm relies on a heuristic randomized search to find biclusters. in this paper, we introduce biclustering las algorithm and then appl...

background human telomerase reverse transcriptase (htert) has become an ideal target for development of anticancer therapy. small interfering rnas (sirnas) are very powerful reagents for gene silencing and show promise for cancer gene therapy. however, only a small number of sirnas have been demonstrated to be effective. for gene therapy targeting htert, it is essential to develop a robust syst...

background: killer cell immunoglobulin-like receptors (kir) are expressed on nk cells and a subset of t cells. the variable kir receptors along with their ligands, hla class i, influence risk for autoimmune and malignant diseases. objective: to investigate the kir gene profiles in relation to susceptibility to graves’ disease in patients with ophthalmopathy. methods: kir genes profiles were ana...

background: regulatory cd4+t (treg) cells are effective in maintaining immune tolerance. objective: to investigate single nucleotide polymorphisms (snps) of transforming growth factor β-1 (tgf-β1) and forkhead box protein 3 (foxp3) genes in iranian patients with allergic rhinitis (ar). methods: variations at codons 10 and 25 of tgf-β1 and foxp3 at positions -3279 a>c and -924 a>g were evaluated...

results a number of 7-11 repeats in the spa gene xr region were determined. strains with 10 repeats were65%, therefore they had the highest percentage in isolates. seven repeats strains were 20% and each of the strains with 8, 9 and 11 repeats had the frequency of 5%. s. aureus strains antibiotic resistance was 35%, 5%, 45% and 40% for tetracycline, amoxicillin, gentamicin and erythromycin resp...