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BMC Cancer
Published in: BMC Cancer 1/2017

Open Access 01-12-2017 | Research article

A genetic variant in long non-coding RNA MALAT1 associated with survival outcome among patients with advanced lung adenocarcinoma: a survival cohort analysis

Authors: Jian-Zhong Wang, Jing-Jun Xiang, Li-Ge Wu, Yan-Sen Bai, Zhuo-Wang Chen, Xiang-Qian Yin, Qing Wang, Wen-Hao Guo, Ying Peng, Huan Guo, Ping Xu

Published in: BMC Cancer | Issue 1/2017

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Abstract

Background

Recently studies have demonstrated that the long non-coding RNA (lncRNA) metastasis associated lung adenocarcinoma transcript 1 (MALAT1) may participate in the development and progression of lung cancer. In this study, we hypothesized that genetic variant of this lncRNA may affect the prognosis of lung cancer patients.

Methods

We conducted a follow-up study for 538 patients with non–small cell lung carcinoma (NSCLC), including 140 early-staged (stage I and II) and 398 advanced staged (stage III and IV) patients. The genetic variant rs3200401 in MALAT1 was then genotyped among this population by using TaqMan assay. The association of this variant with overall survival of these patients was further analyzed.

Results

It was shown that among the advanced lung adenoma patients, subjects carrying rs3200401 CT and CT + TT genotypes had significantly longer median survival time (MST = 29.9, 28.9 vs. 19.3 month, Long-rank P = 0.019 and 0.024, respectively) and decreased death risks [crude HR (95% CI) = 0.65 (0.43–0.98) and 0.64 (0.44–0.95), P = 0.040 and 0.025, respectively], when compared to subjects wtih the MALAT1 rs3200401 CC genotype. However, the beneficial effect of rs3200401 was not seen among early NSCLC and advanced lung squamous cell carcinoma patients. We further tested the TCGA data, and found that a higher expression of MALAT1 was associated with metastatic of advanced lung adenocarcinoma but not with lung squamous cell carcinoma.

Conclusions

The rs3200401 T allele located on the lncRNA MALAT1 was associated with a better survival for advanced lung adenocarcinoma patients, which may offer a novel prognostic biomarker for this patient subgroup. However, these results need to be validated in larger populations of lung cancer and the biological function of this variant still warrants further investigation.
Appendix
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Metadata
Title
A genetic variant in long non-coding RNA MALAT1 associated with survival outcome among patients with advanced lung adenocarcinoma: a survival cohort analysis
Authors
Jian-Zhong Wang
Jing-Jun Xiang
Li-Ge Wu
Yan-Sen Bai
Zhuo-Wang Chen
Xiang-Qian Yin
Qing Wang
Wen-Hao Guo
Ying Peng
Huan Guo
Ping Xu
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2017
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-017-3151-6

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