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Heterogeneity of familial medulloblastoma and contribution of germline PTCH1 and SUFU mutations to sporadic medulloblastoma.

Abstract：

:PTCH1 and SUFU are both regulators of the sonic hedgehog signalling pathway. Germline inactivating mutations in both genes are associated with multisystem phenotypes including medulloblastoma. Somatic inactivating mutations in PTCH1 and SUFU each occur in approximately 10% of medulloblastomas. Recently, SUFU mutations were reported in familial medulloblastoma pedigrees without additional phenotypic features. We sought to further investigate the contribution of germline PTCH1 and SUFU mutations to familial and sporadic medulloblastoma. We performed full-gene mutational analysis of both PTCH1 and SUFU in three familial medulloblastoma pedigrees and 83 individuals with sporadic non-familial medulloblastoma. We identified no mutations in PTCH1 or SUFU in the three familial medulloblastoma pedigrees. We identified no PTCH1 mutations and two SUFU mutations that cause premature protein truncating in the series of sporadic non-familial medulloblastomas. The SUFU mutations were identified in two of the 16 individuals with desmoplastic medulloblastomas. These data indicate that familial medulloblastoma is a genetically heterogeneous disorder with at least one further susceptibility gene to be discovered. Furthermore, although both PTCH1 and SUFU play a key role in the sonic hedgehog signalling pathway, PTCH1 does not make an appreciable contribution to non-familial sporadic medulloblastoma, whereas inactivating germline mutations of SUFU cause ~2-3% of sporadic medulloblastomas and > 10% of desmoplastic medulloblastomas.

journal_name

Fam Cancer

journal_title

Familial cancer

authors

Slade I,Murray A,Hanks S,Kumar A,Walker L,Hargrave D,Douglas J,Stiller C,Izatt L,Rahman N

doi

10.1007/s10689-010-9411-0

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

337-42

issue

2

eissn

1389-9600

issn

1573-7292

journal_volume

10

pub_type

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