breast cancer is the most common cancer among women in developed countries. the prevalence of the disease is increasing in the world. its annual incidence among iranian women is about 7000 cases. rap1a, a tumor suppressor gene, is located at 1p13.3 and plays an important role in the cellular adhesion pathway and is involved in the pathogenesis of breast cancer. the dock4 gene, which is located ...

Background: Pharmacogenomics is the study of genetic variations among individuals to predict the probability that a patient will respond to single or multidrug chemotherapy. Breast cancer is one of the most common cancers among women worldwide. Treatment of breast cancer by application of biological rationales gives us the ability to match the correct pharmacology to individual tumour genetic p...

background: pharmacogenomics is the study of genetic variations among individuals to predict the probability that a patient will respond to single or multidrug chemotherapy. breast cancer is one of the most common cancers among women worldwide. treatment of breast cancer by application of biological rationales gives us the ability to match the correct pharmacology to individual tumour genetic p...

Hypermethylation of promoter regions leading to inactivation of tumor suppressor genes is a common event in the progression of several tumor types. We have employed a novel restriction digestion based multiplex PCR assay to analyse the methylation status of promoter regions of tumor suppressor genes (p16, hMLH1, MGMT and E-cadherin) in sporadic breast carcinomas of Indian women. The present res...

Genomic instability is thought to underlie tumor progression in solid tumors, such as breast cancer. Although evidence that the hereditary breast cancer genes, BRCA1 and BRCA2, are involved in DNA repair suggests that genomic instability plays an important role in hereditary breast tumorigenesis, genomic instability remains poorly characterized in sporadic breast cancers. Using a DNA fingerprin...

The partner and localizer of BRCA2 (PALB2) gene was recently identified as a BRCA2-interacting protein and subsequently shown to be a Fanconi anemia gene (FANCN). Disease-associated point mutations resulting in protein truncation have been found in BRCA1/2 mutation-negative breast cancer families identifying PALB2 as a susceptibility gene for breast cancer. Aberrant promoter hypermethylation is...

PURPOSE Germ-line mutations in the BRCA1 tumor suppressor gene predispose to early onset breast cancers with a distinct phenotype characterized by high tumor grade, aneuploidy, high proliferation rate, and estrogen receptor-negativity. The molecular mechanisms and cooperative oncogenes contributing to multistep tumor progression in cells lacking BRCA1 are not well defined. To examine whether C-...

BRCA1, a breast-ovarian cancer susceptibility gene which has been localized to 17q21, appears to be a tumor suppressor gene based on evidence from loss of heterozygosity (LOH) studies. We analyzed 14 ovarian and breast tumors from BRCA1 carriers and 1 sporadic breast tumor from 3 kindreds for 17q21 LOH. Thirteen of the 14 tumors from gene carriers exhibited LOH of the wild-type allele. Tumors f...

PURPOSE Familial breast cancer represents 5% to 10% of all breast tumors. Mutations in the two known major breast cancer susceptibility genes, BRCA1 and BRCA2, account for a minority of familial breast cancer, whereas families without mutations in these genes (BRCAX group) account for 70% of familial breast cancer cases. EXPERIMENTAL DESIGN To better characterize and define the genomic differ...

Evidence for alteration of the FHIT gene in a significant fraction of breast carcinomas has been reported, in apparent concordance with loss of heterozygosity (LOH) at chromosome region 3p14.2 in breast cancer and benign proliferative breast disease. A significantly higher frequency of LOH at the FHIT locus was reported for BRCA2-/- tumors, possibly due to misrepaired double-strand breaks at th...