Human medulloblastomas lack point mutations and homozygous deletions of the hSNF5/INI1 tumour suppressor gene.

Abstract:

:Medulloblastomas (MBs) are malignant primitive neuroectodermal tumours (PNETs) of the cerebellum occurring predominantly in childhood. The association of monosomy of chromosome 22 with MB is controversial. Atypical teratoid/rhabdoid tumours (AT/RTs) of the brain share clinical and histological features with MBs and supratentorial PNETs (sPNETs). In particular, AT/RTs can be misdiagnosed as MBs and sPNETs because AT/RTs frequently contain areas of primitive neuroepithelial cells similar to PNETs. Recently, mutations of the tumour suppressor gene hSNF5/INI1, located on 22q11.23, have been described in AT/RTs, MBs and sPNETs, with conflicting data on the prevalence of hSNF5/INI1 mutations in the latter entities. Therefore, we screened MBs for point mutations and homozygous deletions of the hSNF5/INI1 tumour suppressor gene. In 90 MBs, no mutations of the hSNF5/INI1 gene were identified. Thus, our study virtually rules out hSNF5/INI1 as a tumour suppressor gene involved in the pathogenesis of medulloblastoma.

authors

Kraus JA,Oster C,Sörensen N,Berthold F,Schlegel U,Tonn JC,Wiestler OD,Pietsch T

doi

10.1046/j.1365-2990.2002.00388.x

keywords:

subject

Has Abstract

pub_date

2002-04-01 00:00:00

pages

136-41

issue

2

eissn

0305-1846

issn

1365-2990

pii

388

journal_volume

28

pub_type

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