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Published in: BMC Cancer 1/2019

Open Access 01-12-2019 | NSCLC | Research article

Prognostic value of TGF-β in lung cancer: systematic review and meta-analysis

Authors: Jue Li, Cheng Shen, Xin Wang, Yutian Lai, Kun Zhou, Pengfei Li, Lunxu Liu, Guowei Che

Published in: BMC Cancer | Issue 1/2019

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Abstract

Background

Lung cancer is the most important cause of cancer-related deaths worldwide and the overall survival of patients with non-small cell lung cancer has not improved. Transforming growth factor beta or TGF-β is a polypeptide member of the transforming growth factor beta superfamily of cytokines, while far fewer clinical studies addressing the association between TGF-β expression and the disease prognosis have been reported up to now. Therefore, our meta-analysis aims to determine the prognostic significance of TGF-β expression in lung cancer patients.

Methods

PubMed, EMBASE, the Web of Science and China National Knowledge Infrastructure (CNKI) databases were searched for full-text literature citations. We applied the hazard ratio (HR) with 95% confidence interval (CI) as the appropriate summarized statistics. Q-test and I2 statistic were used to estimate the level of heterogeneity. The publication bias was detected by Begg’s test and Egger’s test.

Results

Eight eligible studies involving 579 patients were selected for this meta-analysis. The combined HR for the eight eligible studies was 2.17 (95% CI: 1.71–2.77, P < 0.00001) and heterogeneity of overall prognosis was relatively low (I2 = 14.2%, P = 0.319). We further undertook the subgroup analysis including assessment of the association between TGF-β expression and pathology of the lung cancer, treatment and quantity of sample in studies. All the results revealed that a significantly high TGF-β expression in patients was an indicator of poor survival. Neither Begg’s test nor Egger’s test found publication bias in any analysis.

Conclusions

The present evidence indicates that TGF-β expression can significantly predict the worse prognosis in patients with lung cancer. The findings of our meta-analysis may be confirmed in the future by the use of more updated review pooling and additional relevant investigations.
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Metadata
Title
Prognostic value of TGF-β in lung cancer: systematic review and meta-analysis
Authors
Jue Li
Cheng Shen
Xin Wang
Yutian Lai
Kun Zhou
Pengfei Li
Lunxu Liu
Guowei Che
Publication date
01-12-2019
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2019
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-019-5917-5

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