期刊
HUMAN MUTATION
卷 30, 期 4, 页码 669-676出版社
WILEY
DOI: 10.1002/humu.20935
关键词
Pitt-Hopkins; TCF4; bHLH; E-protein; mental retardation
资金
- Agence Nationale pour la Recherche (ANR)
- Fondation pour la Recherche Medicale (FRM)
Pitt-Hopkins syndrome is a severe congenital encephalopathy recently ascribed to de novo heterozygous TCF4 gene mutations. we report a series of 13 novel PHS cases with a TCF4 mutation and show that EEG, brain magnetic resonance imagain (MRI), and immunological investigations provide valuable additional clues to the diagnosis. We confirm a mutational hot spot in the basic domain of the E-protein. Functional studies illustrate that heterodimerisation of mutant TCF4 proteins with a tissue-specific transcription factor is less effective than that homodimerisation in a luciferase reporter assay. We also show that the TCF4 expression pattern in human embryonic development is widespread but not ubiquitous. In summary, we further delineate an underdiagnosed mental retardation syndrome, highlighting TCF4 function during development and facilitating diagnosis within the first year of life. Hum Mutat 30, 669-676, 2009. (C) 2009 Wiley Liss, Inc.
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