Truncating loss-of-function mutations of DISP1 contribute to holoprosencephaly-like microform features in humans.

Abstract:

:Defective function of the Sonic Hedgehog (SHH) signaling pathway is the most frequent alteration underlying holoprosencephaly (HPE) or its various clinical microforms. We performed an extensive mutational analysis of the entire human DISP1 gene, required for secretion of all hedgehog ligand(s) and which maps to the HPE 10 locus of human chromosome 1q41, as a HPE candidate gene. Here, we describe two independent families with truncating mutations in human DISP1 that resemble the cardinal craniofacial and neuro-developmental features of a recently described microdeletion syndrome that includes this gene; therefore, we suggest that DISP1 function contributes substantially to both of these signs in humans. While these clinical features are consistent with common HPE microforms, especially those linked to defective signaling by Sonic Hedgehog, we have insufficient evidence so far that functionally abnormal DISP1 alleles will commonly contribute to the more severe features of typical HPE.

journal_name

Hum Genet

journal_title

Human genetics

authors

Roessler E,Ma Y,Ouspenskaia MV,Lacbawan F,Bendavid C,Dubourg C,Beachy PA,Muenke M

doi

10.1007/s00439-009-0628-7

subject

Has Abstract

pub_date

2009-05-01 00:00:00

pages

393-400

issue

4

eissn

0340-6717

issn

1432-1203

journal_volume

125

pub_type

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