PMID: 9443040Jan 27, 1998Paper

Minimal deletion of 3p13-->14.2 associated with immortalization of human uroepithelial cells

Genes, Chromosomes & Cancer
L VietenC A Reznikoff

Abstract

Immortalization and tumorigenic transformation of many human cell types, including human uroepithelial cells (HUCs), are frequently associated with loss of genetic material from the short arm of chromosome 3 (3p). In addition, losses of 3p have been observed in many human cancers including renal cell carcinoma, lung cancer, breast cancer, and bladder cancer. Genetic studies suggest that there are at least two regions on 3p in which tumor suppressor genes might be located, but the precise location of these genes is not known. We studied chromosome 3 losses that were specifically associated with immortalization of five independent human papilloma virus 16 (HPV16) E6- or E7-transformed HUCs. Cytogenetic analysis showed that the smallest common region of deletion was 3p14.1-->14.2. Fluorescence in situ hybridization using a 3p13-->14-specific yeast artificial chromosome (YAC) contig showed the precise localization of the breakpoints to be in 3p13 and 3p14.2, thus defining the smallest common overlap of 3p deletions in HPV16 E6- or E7-immortalized HUCs. These results suggest the presence in this region of genes involved in the control of senescence in vitro and possibly tumorigenesis in vivo.

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