نتایج جستجو برای: pik3ca
تعداد نتایج: 2433 فیلتر نتایج به سال:
Evidence suggests that nonsteroidal anti-inflammatory drug aspirin (acetylsalicylic acid) may improve patient survival in PIK3CA-mutant colorectal carcinoma, but not in PIK3CA-wild-type carcinoma. However, whether aspirin directly influences the viability of PIK3CA-mutant colon cancer cells is poorly understood. We conducted in vitro experiments to test our hypothesis that the anti-proliferativ...
چکیده مقدمه: مسیر انتقال پیام فسفاتیدیل اینوزیتول 3- کیناز(PI3K) تنظیم کننده طیف گسترده‌ای از فرایندهای مهم سلولی از جمله تکثیر سلولی، بقا، آپوپتوز، جنبش سلولی، مهاجرت سلولی و متابولیسم انسولین است. زیر واحد کاتولیتیکی آلفا انسانی بوسیله ژن فسفوتیدیل اینوزیتول 4،5 بیس فسفات (PIK3CA) کد می‌شود. بر اساس اطلاعات ما این اولین گزارش در مورد پلی‌مورفیسم تکرار دی نولئوتید CA در ژن PIK3CA و ارتباط آ...
We investigated the frequency and function of mutations and increased copy number of the PIK3CA gene in lung cancers. PIK3CA mutations are one of the most common gene changes present in human cancers. We analyzed the mutational status of exons 9 and 20 and gene copy number of PIK3CA using 86 non-small cell lung cancer (NSCLC) cell lines, 43 small cell lung cancer (SCLC) cell lines, 3 extrapulmo...
PURPOSE High activity of the intracellular phosphatidylinositol-3 kinase (PI3K) pathway is common in breast cancer. Here, we explore differences in expression of important PI3K pathway regulators: the activator, phosphatidylinositol-3-kinase catalytic subunit alpha (PIK3CA), and the tumour suppressor, phosphatase and tensin homolog (PTEN), in breast carcinoma tissue and normal breast tissue. Fu...
AIMS To evaluate PIK3CA gene mutations and PIK3CA expression status in Chinese esophageal squamous cell carcinoma (ESCC) patients, and their correlation with clinicopathological characteristics and clinical outcomes. METHODS Direct sequencing was applied to investigate mutations in exons 9 and 20 of PIK3CA in 406 Chinese ESCC patients. PIK3CA expression was evaluated using immunohistochemistr...
BACKGROUND We investigated the epidemiologic characteristics and prognostic significance of PIK3CA mutations/amplifications in curative resected liposarcoma. PATIENTS AND METHODS A total of 125 liposarcoma tissue samples were collected over a 12-year period. PIK3CA mutations and gene copy number amplifications were analyzed by pyrosequencing and fluorescence in situ hybridization (FISH). RE...
PURPOSE Mutations in PIK3CA [the gene encoding the p110α catalytic subunit of phosphatidylinositide-3-kinase (PI3K)] play an important role in colorectal carcinogenesis. Experimental evidence suggests that PIK3CA exon 9 and exon 20 mutations trigger different biologic effects, and that concomitant mutations in both exons 9 and 20 synergistically enhance tumorigenic effects. Thus, we hypothesize...
PIK3CA, which codes for the p110α catalytic subunit of phosphatidylinositol 3-kinase, is one of the most frequently mutated genes in human breast cancer. Here, we describe a mouse model for PIK3CA-induced breast cancer by using the ROSA26 (R26) knock-in system, in which targeted Pik3ca alleles can be activated through transgenic expression of Cre recombinase. We mated Pik3ca(H1047R) and Pik3ca(...
BACKGROUND Somatic mutations of the PIK3CA gene have been described in non-small cell lung cancer (NSCLC), but limited data is available on their biological relevance. This study was performed to characterize PIK3CA-mutated NSCLC clinically and genetically. PATIENTS AND METHODS Tumor tissue collected consecutively from 1144 NSCLC patients within a molecular screening network between March 201...
The genomic region containing PIK3CA was found to be amplified in esophageal squamous cell carcinoma (ESCC) tissue. PIK3CA at 3q26, which encodes the p110alpha catalytic subunit of phosphatidylinositol (PI) 3-kinase, is a unique intracellular signal transducer characterized by its lipid substrate specificity. In order to characterize PIK3CA in ESCC, we investigated hot-spot mutations in exons 1...
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