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The TP53 mutational spectrum and frequency of CHEK2*1100delC in Li-Fraumeni-like kindreds.

Abstract：

:Li-Fraumeni syndrome (LFS) is a dominantly inherited cancer predisposition syndrome characterized by a wide spectrum of neoplasms occurring at young age. Germline mutations in the TP53 tumor suppressor gene have been identified in approximately 71 of LFS patients and 22 of Li-Fraumeni-like (LFL) patients. Mutations within the cell cycle checkpoint gene CHEK2 have also been reported in some patients with LFS, LFL, and phenotypically suggestive of LFS (PS-LFS) not carrying a TP53 mutation. In this study, we show that 7 of the 23 patients with LFS/LFL tested positive for deleterious mutations in p53. Fifteen of the remaining sixteen were not found to carry the CHEK2* 1100delCmutation. These results indicate that CHEK2*1100delC is not a common cause of LFS, LFL, or PS-LFS in North American kindreds not carrying a TP53 mutation. Of note, two patients were found to carry p53* R72P, which is of unknown clinical significance. Lack of segregation of this allele in one of these kindreds provides strong evidence that the R72P allele is not disease-causing. While mutations in p53 account for a proportion of patients with LFS/LFL, future studies are needed to determine if other genes are responsible for LFS/LFL families not carrying germline p53 mutations.

journal_name

Fam Cancer

journal_title

Familial cancer

authors

Siddiqui R,Onel K,Facio F,Nafa K,Diaz LR,Kauff N,Huang H,Robson M,Ellis N,Offit K

doi

10.1007/s10689-004-1946-5

keywords:

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

177-81

issue

2

eissn

1389-9600

issn

1573-7292

journal_volume

4

pub_type

杂志文章

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