Allelic Deletion Mapping of Putative Tumor Suppressor Genes on 17q in Sporadic Ovarian Cancer

Objectives: 1) To study whether the same or different chromosome 17q genes may be involved in the oncogenesis of familial and sporadic ovarian malignancies. 2) To localize the candidate gene in the sporadic ovarian cancers. Methods (Study design): Using DNA extracted from ovarian tumors and corresponding peripheral leukocyte, we examined the status of loss of heterozygosity (LOH) at 12 loci spanning chromosome 17q12–q25 by Southern hybridization and polymerase chain reaction. Results: Comparison of the extent of LOH among 25 epithelial ovarian tumors showing allele loss at one or more loci on 17q, the smallest overlapping region of allelic deletion is between D17S579 and GIP, with a genetic distance of approximate 2cM. Conclusions: From our allelic deletion analysis of chromosome 17q loci, it indicates that there are more than one ovarian cancer candidate genes on chromosome 17q.