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Molecular Biology and Genetics |
Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107 [S. Y., T. K., F. T., K. H., C. M. C.], and Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania 19104 [A. C. H., K. R. D., N. N. W., L. R. K.]
WWOX (WW domain containing oxidoreductase), a putative tumor suppressor gene that mapsto the common fragile site FRA16D on chromosome 16q23.3-24.1, is altered in breast, esophageal, and ovarian cancer. Because the FRA3B/FHIT locus at 3p14.2 is a preferential target for genetic changes caused by tobacco smoke, we intended to evaluate the status of the FRA16D/WWOX gene in non-small cell lung cancer; we have analyzed 27 paired normal and tumor lung tissues and 8 lung cancer cell lines for WWOX alterations by reverse transcriptase-PCR, loss of heterozygosity, and mutation analysis. Transcripts missing WWOX exons were detected in 7 primary tumors (7 of 27; 25.9%) and 5 of 8 cell lines. In addition, loss of heterozygosity at the WWOX locus was observed in 10 primary tumors (10 of 27; 37.0%). We conclude that WWOX alterations occur in a significant fraction of lung cancers and may contribute to the pathogenesis of non-small cell lung cancer.
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