Frequent loss of heterozygosity at 1p36 in ovarian adenocarcinomas but the gene encoding p73 is unlikely to be the target

Imyanitov, Evgeny N., Birrell, Geoff W., Filippovich, Igor, Sorokina, Natasha, Arnold, Jeremy, Mould, Michelle A., Wright, Kim, Walsh, Michael, Mok, Samuel C ., Lavin, Martin F., Chenevix-Trench, Georgia and Khanna, Kum Kum (1999) Frequent loss of heterozygosity at 1p36 in ovarian adenocarcinomas but the gene encoding p73 is unlikely to be the target. Oncogene, 18 32: 4640-4642. doi:10.1038/sj.onc.1202863


Author Imyanitov, Evgeny N.
Birrell, Geoff W.
Filippovich, Igor
Sorokina, Natasha
Arnold, Jeremy
Mould, Michelle A.
Wright, Kim
Walsh, Michael
Mok, Samuel C .
Lavin, Martin F.
Chenevix-Trench, Georgia
Khanna, Kum Kum
Title Frequent loss of heterozygosity at 1p36 in ovarian adenocarcinomas but the gene encoding p73 is unlikely to be the target
Journal name Oncogene   Check publisher's open access policy
ISSN 0950-9232
Publication date 1999-08-12
Sub-type Article (original research)
DOI 10.1038/sj.onc.1202863
Volume 18
Issue 32
Start page 4640
End page 4642
Total pages 3
Place of publication Basingstoke, U.K.
Publisher Stockton Press
Collection year 1999
Language eng
Subject C1
321015 Oncology and Carcinogenesis
730108 Cancer and related disorders
Abstract Loss of heterozygosity (LOH) involving the distal part of the short arm of chromosome 1 occurs frequently in ovarian adenocarcinomas but the tumour suppressor gene(s) targeted by this event is unknown. We have used five microsatellite markers in a panel of 56 ovarian adenocarcinomas to determine which part of 1p34 - 36 is the focus of this LOH. LOH was considerably more common at 1p36 (43%) than at 1p34 - 35 (18%), and 11 tumours showed LOH at 1p36 but not at 1p34 - 35. These data strongly suggest the presence of a tumour suppressor gene inactivated in ovarian adenocarcinoma at 1p36. The p53 homologue, p73, has recently been isolated and mapped to 1p36 and therefore is a candidate for this tumour suppressor gene. However, RT - PCR and Western analyses revealed strong expression of p73 in ovarian adenocarcinoma cell lines but very low or undetectable levels in normal ovarian surface epithelial cells. Immunohistochemical analysis of primary ovarian tumours showed that only 3/22 (14%) contained p73 expressing cells. There was no association between 1p36 LOH and p73 expression in ovarian tumours, nor between p73 and p53 expression. These findings strongly suggest that p73 is not the target of 1p36 LOH in ovarian adenocarcinomas but indicate the presence of an, as yet unidentified, tumour suppressor gene in this region that plays an important role in ovarian tumorigenesis.
Keyword p73
ovarian adenocarcinoma
loss of heterozygosity
tumour suppressor
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Medicine Publications
 
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Created: Wed, 11 Jun 2008, 00:13:28 EST