Gene expression profiling reveals novel biomarkers in nonsmall cell lung cancer.

Abstract:

:The development of reliable gene expression profiling technology is having an increasing impact on our understanding of lung cancer biology. Our study aimed to determine any correlation between the phenotypic heterogeneity and genetic diversity of lung cancer. Microarray analysis was performed on a set of 46 tumor samples and 45 paired nontumor samples of nonsmall cell lung cancer (NSCLC) samples to establish gene signatures in primary adenocarcinomas and squamous-cell carcinomas, determine differentially expressed gene sequences at different stages of the disease and identify sequences with biological significance for tumor progression. After the microarray analysis, the expression level of 92 selected genes was validated by qPCR and the robust Bonferroni test in an independent set of 70 samples composed of 48 tumor samples and 22 nontumor samples. Gene sequences were differentially expressed as a function of tumor type, stage and differentiation grade. High upregulation was observed for KRT15 and PKP1, which may be good markers to distinguish squamous-cell carcinoma samples. High downregulation was observed for DSG3 in stage IA adenocarcinomas.

journal_name

Int J Cancer

authors

Sanchez-Palencia A,Gomez-Morales M,Gomez-Capilla JA,Pedraza V,Boyero L,Rosell R,Fárez-Vidal ME

doi

10.1002/ijc.25704

subject

Has Abstract

pub_date

2011-07-15 00:00:00

pages

355-64

issue

2

eissn

0020-7136

issn

1097-0215

journal_volume

129

pub_type

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