Frequent p16-independent inactivation of p14ARF in human melanoma.

ABSTRACT:

Background

The tumor suppressors p14(ARF) (ARF) and p16(INK4A) (p16) are encoded by overlapping reading frames at the CDKN2A/INK4A locus on chromosome 9p21. In human melanoma, the accumulated evidence has suggested that the predominant tumor suppressor at 9p21 is p16, not ARF. However, recent observations from melanoma-prone families and murine melanoma models suggest a p16-independent tumor suppressor role for ARF. We analyzed a group of melanoma metastases and cell lines to investigate directly whether somatic alterations to the ARF gene support its role as a p16-independent tumor suppressor in human melanoma, assuming that two alterations (genetic and/or epigenetic) would be required to inactivate a gene.

Methods

We examined the p16/ARF locus in 60 melanoma metastases fro

SUBMITTER: Freedberg DE 

PROVIDER: S-EPMC4410798 | biostudies-literature | 2008 Jun

REPOSITORIES: biostudies-literature