Scientific Reports (Jun 2017)

Overexpression of LINC00152 correlates with poor patient survival and knockdown impairs cell proliferation in lung cancer

  • Shumei Feng,
  • Jie Zhang,
  • Wenmei Su,
  • Shengbin Bai,
  • Lei Xiao,
  • Xiuyuan Chen,
  • Jules Lin,
  • Rishindra M. Reddy,
  • Andrew C. Chang,
  • David G. Beer,
  • Guoan Chen

DOI
https://doi.org/10.1038/s41598-017-03043-x
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 10

Abstract

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Abstract We employed RNA sequencing analysis to reveal dysregulated lncRNAs in lung cancer utilizing 461 lung adenocarcinomas and 156 normal lung tissues from 3 separate cohorts. We found that LINC00152 was highly overexpressed in lung tumors as compared to their adjacent normal tissues. Patients with high LINC00152 expression demonstrate a significantly poorer survival than those with low expression. We verified the diagnostic/prognostic potential of LINC00152 expression in an independent cohort of lung tumor tissues using quantitative RT-PCR. After knockdown of LINC00152 using siRNAs in lung cancer cell lines, both cell proliferation and colony formation were decreased. Cell fractionation and qRT-PCR analysis indicated that LINC00152 is found mainly in the cytoplasm. Treatment with Trichostatin A in cell lines having low LINC00152 expression indicated that histone acetylation may be one mechanism underlying LINC00152 overexpression in NSCLC. Western blot analyses indicated that p38a, STAT1, STAT3, CREB1, CCNE1 and c-MYC proteins were decreased after LINC00152 siRNA treatment. Our study indicates LINC00152 plays an important role in lung tumor growth and is potentially a diagnostic/prognostic marker. Further characterization of LINC00152 in regulating its target proteins may provide a novel therapeutic target of lung cancer.