Development and Validation of a Quantitative Real-time Polymerase Chain Reaction Classifier for Lung Cancer Prognosis

Overview

Journal J Thorac Oncol

Publisher Elsevier

Specialties Oncology
Pulmonary Medicine

Date 2011 Jul 28

PMID 21792073

Citations 19

Authors

Guoan Chen

Sinae Kim

Jeremy M G Taylor

Zhuwen Wang

Oliver Lee

Nithya Ramnath

Rishindra M Reddy

Jules Lin

Andrew C Chang

Mark B Orringer

David G Beer

Affiliations

Soon will be listed here.

Abstract

Introduction: This prospective study aimed to develop a robust and clinically applicable method to identify patients with high-risk early-stage lung cancer and then to validate this method for use in future translational studies.

Methods: Three published Affymetrix microarray data sets representing 680 primary tumors were used in the survival-related gene selection procedure using clustering, Cox model, and random survival forest analysis. A final set of 91 genes was selected and tested as a predictor of survival using a quantitative real-time polymerase chain reaction-based assay using an independent cohort of 101 lung adenocarcinomas.

Results: The random survival forest model built from 91 genes in the training set predicted patient survival in an independent cohort of 101 lung adenocarcinomas, with a prediction error rate of 26.6%. The mortality risk index was significantly related to survival (Cox model p < 0.00001) and separated all patients into low-, medium-, and high-risk groups (hazard ratio = 1.00, 2.82, 4.42). The mortality risk index was also related to survival in stage 1 patients (Cox model p = 0.001), separating patients into low-, medium-, and high-risk groups (hazard ratio = 1.00, 3.29, 3.77).

Conclusions: The development and validation of this robust quantitative real-time polymerase chain reaction platform allows prediction of patient survival with early-stage lung cancer. Utilization will now allow investigators to evaluate it prospectively by incorporation into new clinical trials with the goal of personalized treatment of patients with lung cancer and improving patient survival.

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