SOX2 suppresses CDKN1A to sustain growth of lung squamous cell carcinoma.

Abstract:

:Since the SOX2 amplification was identified in lung squamous cell carcinoma (lung SCC), SOX2 transcriptional downstream targets have been actively investigated; however, such targets are often cell line specific. Here, in order to identify highly consensus SOX2 downstream genes in lung SCC cells, we used RNA-seq data from 178 lung SCC specimens (containing tumor and tumor-associated cells) and analyzed the correlation between SOX2 and previously-reported SOX2-controlled genes in lung SCC. In addition, we used another RNA-seq dataset from 105 non-small cell lung cancer cell lines (NSCLC; including 4 lung SCC cell lines) and again analyzed the correlation between SOX2 and the reported SOX2-controlled genes in the NSCLC cell lines (no tumor-associated cells). We combined the two analyses and identified genes commonly correlated with SOX2 in both datasets. Among the 99 genes reported as SOX2 downstream and/or correlated genes, we found 4 negatively-correlated (e.g., CDKN1A) and 11 positively-correlated genes with SOX2. We used biological studies to demonstrate that CDKN1A was suppressed by SOX2 in lung SCC cells. G1 cell cycle arrest induced by SOX2 siRNA was rescued by CDKN1A siRNA. These results indicate that the tumorigenic effect of SOX2 in lung SCC cells is mediated in part by suppression of CDKN1A.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Fukazawa T,Guo M,Ishida N,Yamatsuji T,Takaoka M,Yokota E,Haisa M,Miyake N,Ikeda T,Okui T,Takigawa N,Maeda Y,Naomoto Y

doi

10.1038/srep20113

subject

Has Abstract

pub_date

2016-02-05 00:00:00

pages

20113

issn

2045-2322

pii

srep20113

journal_volume

6

pub_type

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