Advertisement

Topics

A study of HER2 gene amplification and protein expression in gastric cancer.

06:00 EDT 11th August 2010 | BioPortfolio

Summary of "A study of HER2 gene amplification and protein expression in gastric cancer."

Background Gastric cancer is a leading cause of cancer-related mortality, and current treatment outcomes for advanced disease remain poor. HER2 has been identified as a potential candidate for targeted therapy in gastric cancers displaying HER2 gene amplification and protein overexpression. Aims To study the prevalence rate of HER2 gene amplification/overexpression in a local population, and determine the concordance rate between the various modalities. Methods 128 gastric cancer samples were analysed by fluorescence (FISH) and chromogenic (CISH) in situ hybridisation and immunohistochemistry (IHC). The relation between HER2 status and various clinicopathological parameters was also analysed. Results 11.7% (15/128) and 9.4% (12/128) of gastric cancers displayed HER2 gene amplification and protein overexpression (score 3+), respectively, with a perfect correlation between the FISH and CISH analyses. There was also a significant inverse correlation between overall survival and HER2 protein overexpression in intestinal-type gastric carcinomas (p<0.05). Conclusion Results, besides corroborating existing reports that discrepancies exist between HER2 ISH and IHC assays, also suggest the need to rigorously evaluate CISH as an independent reference standard for assessment of HER2 amplification in gastric cancers.

Affiliation

Department of Pathology, National University Health System and National University of Singapore, Singapore, Republic of Singapore.

Journal Details

This article was published in the following journal.

Name: Journal of clinical pathology
ISSN: 1472-4146
Pages:

Links

DeepDyve research library

PubMed Articles [54372 Associated PubMed Articles listed on BioPortfolio]

IMMUNOHISTOCHEMICAL EXPRESSION OF HER2 IN ADENOCARCINOMA OF THE STOMACH.

Background Worldwide, gastric cancer is the fourth cancer in incidence and the second most common cause of cancer death. Gastric cancer is asymptomatic in the early stages and very often diagnosed at ...

Serum HER2 as an adjunct to assess HER2 status for advanced gastric cancer: A prospective multicenter trial (SHERLOCK).

Intratumoral human epidermal growth factor receptor 2 (HER2) heterogeneity of gastric cancer can be an obstacle to accurate HER2 assessment. Serum HER2, concentrations of the HER2 extracellular domain...

HER2/ERBB2 immunoreactivity in human retinoblastoma.

Retinoblastoma (RB) is an ocular malignancy of early childhood. Although mutations in the Rb1 gene and expression of stem cell markers have been identified in RB, additional information on RB-specific...

Programmed cell death protein 1 expression is an independent prognostic factor in gastric cancer after curative resection.

Programmed cell death protein 1 (PD-1) and its ligand PD-L1 downregulate T cell activation and are related to immune tolerance. The aim of this study was to clarify the significance of PD-1 and PD-L1 ...

Concordance of HER2 expression in paired primary and metastatic sites of gastric and gastro-oesophageal junction cancers.

HER2 is amplified/overexpressed in a subset of gastric and gastro-oesophageal junction cancers. Addition of anti-HER2 therapy has been shown to provide survival benefit in this setting. However, there...

Clinical Trials [8785 Associated Clinical Trials listed on BioPortfolio]

Level of HER2-neu Gene Amplification an Response to Trastuzumab

Primary objective of the study is to evaluate the correlation between level of HER2-neu gene amplification evalued by dual-color Fluorescent in-situ hybridization (FISH) test and time to p...

LOGiC - Lapatinib Optimization Study in ErbB2 (HER2) Positive Gastric Cancer: A Phase III Global, Blinded Study Designed to Evaluate Clinical Endpoints and Safety of Chemotherapy Plus Lapatinib

This is an international multi-center trial that will enroll patients with locally advanced, unresectable, or metastatic gastric, esophageal, or gastro-esophageal junction cancer whose tum...

Semi-Quantification of Her2/Neu Protein Expression in Formalin Fixed, Paraffin-Embedded Normal and Neoplastic Tissue

The purpose of the study is the identification and quantification of protein expression level in breast cancer tissues. The imaging system is intended for diagnostic use as an aid to the ...

PTK787 + Trastuzumab for HER2 Overexpressing Metastatic Breast Cancer

HER2 gene amplification increases VEGF production in breast cancers; combined inhibition of HER2 and VEGF enhances response in xenograft models. The upregulation of VEGF in HER2-overexpres...

Construction and Use of Lung Tumor Microarray for the Analysis of Gene Expression in Lung Cancer

The proposed research intends to construct a set of tissue microarrays containing different types of normal and lung cancer tissues for the study of genes associated with lung cancer. Thus...

Medical and Biotech [MESH] Definitions

Techniques used to add in exogenous gene sequence such as mutated genes; REPORTER GENES, to study mechanisms of gene expression; or regulatory control sequences, to study effects of temporal changes to GENE EXPRESSION.

A proto-oncogene protein and member of the Wnt family of proteins. It is frequently up-regulated in human GASTRIC CANCER and is a tumor marker (TUMOR MARKERS, BIOLOGICAL) of gastric and COLORECTAL CANCER.

That portion of the stomach remaining after gastric surgery, usually gastrectomy or gastroenterostomy for cancer of the stomach or peptic ulcer. It is a common site of cancer referred to as stump cancer or carcinoma of the gastric stump.

Techniques to alter a gene sequence that result in an inactivated gene, or one in which the expression can be inactivated at a chosen time during development to study the loss of function of a gene.

A large, nuclear protein, encoded by the BRCA2 gene (GENE, BRCA2). Mutations in this gene predispose humans to breast and ovarian cancer. The BRCA2 protein is an essential component of DNA repair pathways, suppressing the formation of gross chromosomal rearrangements. (from Genes Dev. 2000;14(11):1400-6)

Quick Search
Advertisement
 


DeepDyve research library

Relevant Topics

Bioinformatics
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...

Nutrition
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...


Searches Linking to this Article