نتایج جستجو برای: brca1 و brca2
تعداد نتایج: 770130 فیلتر نتایج به سال:
BACKGROUND Germline mutations in the BRCA1 and BRCA2 genes are the most frequent known hereditary causes of familial breast cancer. Little is known about the interaction of age at diagnosis, estrogen receptor (ER) and progesterone receptor (PgR) expression and outcomes in patients with BRCA1 or BRCA2 mutations. METHODS A PubMed search identified publications exploring the association between ...
Mutations in the BRCA1/2 genes are associated with an increased risk of breast cancer, but no large-scale research have examined the BRCA1/2 mutations in Chinese Kazakh women. We evaluated the frequency and distributions of BRCA1 and BRCA2 gene mutations in Kazakh sporadic breast cancer patients and healthy women in China. The association between the clinical-pathologic features of Kazakh breas...
PURPOSE Pancreatic ductal adenocarcinoma (PDAC) is associated with the breast ovarian cancer syndrome (BRCA1/BRCA2) mutations. It is unknown if this association is causal. EXPERIMENTAL DESIGN This is a single-site study of patients who underwent surgical pancreatic tumor resection and self-identified as Ashkenazi Jewish. DNA from normal pancreatic tissue was genotyped for the three Ashkenazi ...
AIMS Women with inherited pathogenic mutations in the BRCA1 or BRCA2 genes have up to an 85% risk of developing breast cancer in their lifetime. However, only about 20% of familial breast cancer is attributed to mutations in BRCA1 and BRCA2, while a further 5-10% are attributed to mutations in other rare susceptibility genes such as TP53, STK11, PTEN, ATM and CHEK2. Despite extensive efforts to...
There are two major cancer susceptibility genes, BRCA1 and BRCA2, mutations in which predispose to early onset breast and ovarian cancer. 2 The frequency of BRCA1 and BRCA2 mutations in the general population ranges from 1-500 to 1-800. 3 In a recent population study, the authors showed that the estimated population frequencies for BRCA1 and BRCA2 mutations were similar under both recessive and...
BACKGROUND Because it is insufficiently clear whether BRCA-associated epithelial ovarian cancer (EOC) is more chemosensitive than sporadic EOC, we examined response to chemotherapy, progression-free survival (PFS) and overall survival (OS) in BRCA1- and BRCA2-associated versus sporadic EOC patients. METHODS Data about patient characteristics, response to and outcome after primary therapy, inc...
BACKGROUND It is recommended that BRCA1/2 mutation carriers undergo breast cancer screening using MRI because of their very high cancer risk and the high sensitivity of MRI in detecting invasive cancers. Clinical observations suggest important differences in the natural history between breast cancers due to mutations in BRCA1 and BRCA2, potentially requiring different screening guidelines. ME...
PURPOSE We analyzed the expression of critical cell cycle regulators cyclin E and cyclin D1 in familial breast cancer, focusing on BRCA mutation-negative tumors. Cyclin E expression in tumors of BRCA1 or BRCA2 carriers is higher, and cyclin D1 expression lower, than in sporadic tumors. In familial non-BRCA1/2 tumors, cyclin E and cyclin D1 expression has not been studied. EXPERIMENTAL DESIGN ...
مقدمه: آفلاتوکسین ها ترکیباتی سرطان زا هستند که توسط قارچ های aspergillus flvaus و a. parasiticus تولید می شوند. در میان آفلاتوکسین های شناخته شده سرطان زایی آفلاتوکسین b1 بیشتر از سایر آفلاتوکسین ها می باشد. این سم می تواند با آلوده کردن مواد غذایی وارد بدن انسان و درنهایت بافت پستان شود. دو ژن مؤثر در سرکوب تومور در پستان، ژن های brca1 و brca2 می باشند که بیان این ژن ها می تواند توسط آفلاتوکس...
Comprehensive spectrum of BRCA1 and BRCA2 deleterious mutations in breast cancer in Asian countries.
Approximately 5%-10% of breast cancers are due to genetic predisposition caused by germline mutations; the most commonly tested genes are BRCA1 and BRCA2 mutations. Some mutations are unique to one family and others are recurrent; the spectrum of BRCA1/BRCA2 mutations varies depending on the geographical origins, populations or ethnic groups. In this review, we compiled data from 11 participati...
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