Abstract
Lineage-survival oncogenes are activated by somatic DNA alterations in cancers arising from the cell lineages in which these genes play a role in normal development. Here we show that a peak of genomic amplification on chromosome 3q26.33 found in squamous cell carcinomas (SCCs) of the lung and esophagus contains the transcription factor gene SOX2, which is mutated in hereditary human esophageal malformations, is necessary for normal esophageal squamous development, promotes differentiation and proliferation of basal tracheal cells and cooperates in induction of pluripotent stem cells. SOX2 expression is required for proliferation and anchorage-independent growth of lung and esophageal cell lines, as shown by RNA interference experiments. Furthermore, ectopic expression of SOX2 here cooperated with FOXE1 or FGFR2 to transform immortalized tracheobronchial epithelial cells. SOX2-driven tumors show expression of markers of both squamous differentiation and pluripotency. These characteristics identify SOX2 as a lineage-survival oncogene in lung and esophageal SCC.
| Original language | English |
|---|---|
| Journal | Nature Genetics |
| Volume | 41 |
| Issue number | 11 |
| Pages (from-to) | 1238-1242 |
| Number of pages | 5 |
| ISSN | 1061-4036 |
| DOIs | |
| Publication status | Published - 11.2009 |
Funding
We thank J. Francis, J. Cho, A. Schinzel, R. Firestein, I. Guney and J. Boehm for technical advice and discussions. A.J.B. is supported by the Harvard Clinical Investigator Training Program and American Society of Clinical Oncology. H.W. is supported by a Ruth L. Kirschstein NRSA T32 institutional training grant. R.G.V. is supported by the KWF Kankerbestrijding. The Morphology, Molecular Biology and Cell Culture Core of 5P01CA098101-05 (A.K.R.) provided tissue processing for this project. This work was supported by US Department of Defense VITAL grant (J.D.M, A.F.G.) and by National Cancer Institute grants K08CA134931 (A.J.B.), P50CA70907 (J.D.M, A.F.G.), R33CA128625 (W.C.H.), R01CA071606-12 (D.G.B.), P01CA098101-05 (A.K.R.) and R01CA109038 and P50CA90578 (M.M.). Funding for lung SCC SNP arrays was provided by Genentech, Inc. Funding was provided by the Sara Thomas Monopoli Lung Cancer Research Fund and the Seaman Corporation Fund for Lung Cancer Research.