Codeletion of p15 and p16 genes in primary non-small cell lung carcinoma - PubMed (original) (raw)
. 1995 Jul 15;55(14):2968-71.
Affiliations
- PMID: 7606711
Codeletion of p15 and p16 genes in primary non-small cell lung carcinoma
S Xiao et al. Cancer Res. 1995.
Abstract
Chromosome band 9p21 is deleted frequently in non-small cell lung carcinoma (NSCLC), and the p15 and p16 cyclin-dependent kinase-4 inhibitor genes map within this deletion region. Recent studies demonstrated deletion of p15 and p16 in NSCLC metastases and cell lines, suggesting a role for these genes in NSCLC progression. We now report p15 and p16 copy number, as determined by fluorescence in situ hybridization with a P1 contig, in 18 primary NSCLCs. Codeletion of p15 and p16 was found in 15 of 18 NSCLCs, and 1 of the 3 tumors with normal p15 and p16 copy number had a nonsense mutation in exon 2 of p16. We conclude that p15 and p16 are deleted and/or mutated in most primary NSCLCs. Two observations, however, support the involvement of at least one additional tumor suppressor gene on chromosome 9. These observations are: (a) the large size (> 100 kb) of most NSCLC p15/p16 deletions; and (b) the absence of exon 2 mutations in most retained NSCLC p15 and p16 alleles.
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