当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF CANCER期刊下所有文献 > Transcriptomic profiling reveals three molecular phenotypes of adenocarcinoma at the gastroesophageal junction.

Transcriptomic profiling reveals three molecular phenotypes of adenocarcinoma at the gastroesophageal junction.

Abstract：

:Cancers occurring at the gastroesophageal junction (GEJ) are classified as predominantly esophageal or gastric, which is often difficult to decipher. We hypothesized that the transcriptomic profile might reveal molecular subgroups which could help to define the tumor origin and behavior beyond anatomical location. The gene expression profiles of 107 treatment-naïve, intestinal type, gastroesophageal adenocarcinomas were assessed by the Illumina-HTv4.0 beadchip. Differential gene expression (limma), unsupervised subgroup assignment (mclust) and pathway analysis (gage) were undertaken in R statistical computing and results were related to demographic and clinical parameters. Unsupervised assignment of the gene expression profiles revealed three distinct molecular subgroups, which were not associated with anatomical location, tumor stage or grade (p > 0.05). Group 1 was enriched for pathways involved in cell turnover, Group 2 was enriched for metabolic processes and Group 3 for immune-response pathways. Patients in group 1 showed the worst overall survival (p = 0.019). Key genes for the three subtypes were confirmed by immunohistochemistry. The newly defined intrinsic subtypes were analyzed in four independent datasets of gastric and esophageal adenocarcinomas with transcriptomic data available (RNAseq data: OCCAMS cohort, n = 158; gene expression arrays: Belfast, n = 63; Singapore, n = 191; Asian Cancer Research Group, n = 300). The subgroups were represented in the independent cohorts and pooled analysis confirmed the prognostic effect of the new subtypes. In conclusion, adenocarcinomas at the GEJ comprise three distinct molecular phenotypes which do not reflect anatomical location but rather inform our understanding of the key pathways expressed.

journal_name

Int J Cancer

journal_title

International journal of cancer

authors

Bornschein J,Wernisch L,Secrier M,Miremadi A,Perner J,MacRae S,O'Donovan M,Newton R,Menon S,Bower L,Eldridge MD,Devonshire G,Cheah C,Turkington R,Hardwick RH,Selgrad M,Venerito M,Malfertheiner P,OCCAMS Consortium.,F

doi

10.1002/ijc.32384

subject

Has Abstract

pub_date

2019-12-15 00:00:00

pages

3389-3401

issue

eissn

0020-7136

issn

1097-0215

journal_volume

145

pub_type

杂志文章

在线工具

Transcriptomic profiling reveals three molecular phenotypes of adenocarcinoma at the gastroesophageal junction.