Relevance of insulin-like growth factor 1 receptor gene expression as a prognostic factor in non-small-cell lung cancer.

Abstract:

PURPOSE:Signalling through the insulin-like growth factor 1 receptor (IGF-1R) is implicated in carcinogenesis, metastasis, and resistance to cytotoxic cancer therapies. The purpose of this study was to investigate the prognostic role of IGF-1R expression in surgically resected non-small-cell lung cancer (NSCLC), and responses to IGF-1R tyrosine kinase inhibitor NVP-ADW742 in a panel of lung cancer cell lines. METHODS:Insulin-like growth factor 1 receptor (IGF-1R) expression was evaluated by quantitative RT-PCR in 115 NSCLC samples and in a panel of 6 NSCLC cell lines. Cytotoxicity experiments with IGF-1R inhibitor and conventional systemic drugs such as paclitaxel in cell lines were realised. RESULTS:Insulin-like growth factor 1 receptor (IGF-1R) was differentially expressed across histologic subtypes, with the lowest levels observed in squamous cell tumours. Median survival was longer in patients with squamous tumour histology expressing low IGF-1R levels. In multivariable analysis, ageing and high tumour stage were significant predictors of worse overall survival. The hazard of death was lower in patients with squamous histology and low IGF-1R gene expression. There was no correlation between IGF-1R expression and response to tyrosine kinase inhibitor in cell lines tested. However, combination drug treatment resulted in synergistically enhanced antiproliferative effects on several cell lines. CONCLUSIONS:These findings suggest that IGF-1R is a potential target for therapy in NSCLC patients. Combination therapies will have an important role in treatment.

authors

Agulló-Ortuño MT,Díaz-García CV,Agudo-López A,Pérez C,Cortijo A,Paz-Ares L,López-Ríos F,Pozo F,de Castro J,Cortés-Funes H,López Martín JA

doi

10.1007/s00432-014-1787-z

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

43-53

issue

1

eissn

0171-5216

issn

1432-1335

journal_volume

141

pub_type

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