نتایج جستجو برای: ژن pik3ca
تعداد نتایج: 18195 فیلتر نتایج به سال:
PURPOSE Detecting circulating plasma tumor DNA (ptDNA) in patients with early-stage cancer has the potential to change how oncologists recommend systemic therapies for solid tumors after surgery. Droplet digital polymerase chain reaction (ddPCR) is a novel sensitive and specific platform for mutation detection. EXPERIMENTAL DESIGN In this prospective study, primary breast tumors and matched p...
Although 75% of endometrial cancers are treated at an early stage, 15% to 20% of these recur. We performed an integrated analysis of genome-wide expression and copy-number data for primary endometrial carcinomas with extensive clinical and histopathological data to detect features predictive of recurrent disease. Unsupervised analysis of the expression data distinguished 2 major clusters with s...
Phosphatidylinositol-3 phosphate kinase (PI3K) and phosphatase protein homologue to tensin (PTEN) are involved in cell signaling by catalyzing opposite reactions in the balance of phosphatidylinositol-3,4,5,-trisphosphate and are deregulated in many tumors. Recently, Saal et al. (1) reported that these two proteins are altered in a consistent fraction of breast cancers and, more importantly, th...
Increased signaling through the phosphoinositide 3-kinase (PI3K)/AKT/ mammalian target of rapamycin (mTOR) pathway occurs in diverse malignancies. In cancer, the PI3K/AKT/mTOR pathway can be activated by mutations in several oncogenes such as PIK3CA, PIK3R1, AKT, TSC1/2, LKB1 and PTEN (Fig. 1). Most activating mutations occur in the helical or kinase domain of the PIK3CA gene. Preclinical model...
Mosaicism is increasingly recognized as a cause of developmental disorders with the advent of next-generation sequencing (NGS). Mosaic mutations of PIK3CA have been associated with the widest spectrum of phenotypes associated with overgrowth and vascular malformations. We performed targeted NGS using 2 independent deep-coverage methods that utilize molecular inversion probes and amplicon sequen...
Somatic mutations in cervical intraepithelial neoplasia (CIN) are largely unknown. Here, we profiled 35 cervical carcinomas and 23 CIN grade 2/3 (CIN2/3) for mutations in 48 cancer-related genes using a Next Generation Sequencing-based cancer panel. PIK3CA exon 9 was the most frequently mutated locus in cervical carcinoma and the only mutated locus detected in CIN2/3. These PIK3CA exon 9 mutati...
BACKGROUND The PIK3CA gene mutation was found to associate with prognosis and might affect molecular targeted therapy in esophageal carcinoma (EC). The aim of this study is to compare different methods for analyzing the PIK3CA gene mutation in EC. METHODS Genomic DNA was extracted from 106 surgically resected EC patient tissues. The PIK3CA mutation status (exons 9 and 20) were screened by mut...
In an effort to identify genes whose expression is regulated by activated phosphatidylinositol 3-kinase (PI3K) signaling, we performed microarray analysis and subsequent quantitative reverse transcription-PCR on an isogenic set of PTEN gene-targeted human cancer cells. Numerous p53 effectors were upregulated following PTEN deletion, including p21, GDF15, PIG3, NOXA, and PLK2. Stable depletion o...
BACKGROUND Mutations of the p110α catalytic subunit of phosphatidylinositol 3-kinase (PIK3CA) are among the most common genetic aberrations in human breast cancer. At present, controversy exists concerning the prognostic value of the mutations. METHODS We performed a systematic review and meta-analysis to clarify the association between PIK3CA mutations and survival outcomes. A comprehensive,...
PIK3CA-Related Overgrowth Spectrum (PROS) refers to rare syndromes, which are characterized by malformations and excessive tissue growth caused somatic mutations in the PIK3CA gene occurring during embryogenesis. This article discusses pathogenesis, clinical picture, diagnosis treatment of these syndromes. Some illustrations used this copied from other resources, rights authors respected not vi...
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