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Two TP53 germline mutations in a classical Li-Fraumeni syndrome family

Two TP53 germline mutations in a classical Li-Fraumeni syndrome family Li-Fraumeni syndrome (LFS) is an autosomal dominantly inherited cancer predisposition syndrome characterized by a combination of tumors including sarcoma, breast cancer, brain tumors, adrenocortical carcinoma and leukemia. Germline mutations in the tumor suppressor gene TP53 are associated with LFS. We present a family with LFS in which initially a novel germline TP53 intron 5 splice site mutation was found. A second germline TP53 mutation, the exon 7 Asn235Ser (704A→G) mutation, was detected in this family through pre-symptomatic DNA testing. This latter mutation has been reported repeatedly in the literature as a pathogenic mutation involved in LFS. We provide evidence for pathogenicity of the novel intron 5 splice site mutation, whereas this evidence is lacking for the exon 7 Asn235Ser (704A→G) mutation. Our findings emphasize the importance of performing additional tests in case of germline sequence variants with uncertain functional effects. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Familial Cancer Springer Journals

Two TP53 germline mutations in a classical Li-Fraumeni syndrome family

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References (20)

Publisher
Springer Journals
Copyright
Copyright © 2007 by Springer Science + Business Media B.V.
Subject
Biomedicine; Biomedicine general; Epidemiology; Human Genetics ; Cancer Research
ISSN
1389-9600
eISSN
1573-7292
DOI
10.1007/s10689-006-9115-7
pmid
17318340
Publisher site
See Article on Publisher Site

Abstract

Li-Fraumeni syndrome (LFS) is an autosomal dominantly inherited cancer predisposition syndrome characterized by a combination of tumors including sarcoma, breast cancer, brain tumors, adrenocortical carcinoma and leukemia. Germline mutations in the tumor suppressor gene TP53 are associated with LFS. We present a family with LFS in which initially a novel germline TP53 intron 5 splice site mutation was found. A second germline TP53 mutation, the exon 7 Asn235Ser (704A→G) mutation, was detected in this family through pre-symptomatic DNA testing. This latter mutation has been reported repeatedly in the literature as a pathogenic mutation involved in LFS. We provide evidence for pathogenicity of the novel intron 5 splice site mutation, whereas this evidence is lacking for the exon 7 Asn235Ser (704A→G) mutation. Our findings emphasize the importance of performing additional tests in case of germline sequence variants with uncertain functional effects.

Journal

Familial CancerSpringer Journals

Published: Feb 23, 2007

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