Ovarian Cancer Has Frequent Loss of Heterozygosity at Chromosome 12p12.3-13.1 (region of TEL and Kip1 Loci) and Chromosome 12q23-ter: Evidence for Two New Tumour-suppressor Genes

Overview

Journal Br J Cancer

Specialty Oncology

Date 1997 Jan 1

PMID 9155043

Citations 9

Authors

Y Hatta

S Takeuchi

J Yokota

H P Koeffler

Affiliations

Soon will be listed here.

Abstract

Identification of the key genetic alterations leading to ovarian cancer is in its infancy. Polymerase chain reaction (PCR)-based analysis of loss of heterozygosity (LOH) is a powerful method for detecting regions of altered tumour-suppressor genes. Focusing on chromosome 12, we examined 23 ovarian cancer samples for LOH using 31 highly polymorphic microsatellite markers and found the chromosomal localization of two putative tumour-suppressor genes. Two commonly deleted regions were 12p12.3-13.1 in 6/23 (26%) and 12q23-ter in 7/23 (30%) samples. LOH on chromosome 12 was more common in late-stage ovarian carcinomas. The region of LOH at 12p12.3-13.1 includes the genes that code for the ETS-family transcriptional factor, known as TEL, and the cyclin-dependent kinase inhibitor, known as p27Kip1. Mutational analysis of both TEL and p27Kip1 using single-strand conformation polymorphism (SSCP) showed no abnormalities, suggesting that the altered gene in this region is neither of these genes. Taken together, our data suggest that new tumour-suppressor genes in the region of chromosomes 12p12.3-13.1 and 12q23-ter may be involved in the development of ovarian cancer.

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