Track topics on Twitter Track topics that are important to you
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.
Department of Pathology, National University Health System and National University of Singapore, Singapore, Republic of Singapore.
This article was published in the following journal.
Name: Journal of clinical pathology
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...
We previously demonstrated the potential of circulating tumor DNA (ctDNA) for the amplification of detecting HER2 in patients with gastric cancer (GC). In the present study, we focused on the clinical...
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...
Valid HER2 testing is essential for the optimal care of patients with HER2-positive gastric cancer and the correct use of first-line treatment. Although all cases of breast cancer are routinely tested...
Valid HER2 testing is essential for optimal therapy of patients with HER2 positive gastric cancer and the correct use of first-line treatment. While each breast cancer is routinely being tested for th...
Background: Gastric cancer (GC) is major global health concern and the second leading cause of cancer deaths worldwide. Amplification of Her2/neu gene and/or overexpression of the Her2/neu...
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...
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...
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 ...
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...
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)
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...
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...