Abstract:
:Hemizygous deletion of chromosome 22q11 (del22q11) causes thymic, parathyroid, craniofacial and life-threatening cardiovascular birth defects in 1 in 4,000 infants. The del22q11 syndrome is likely caused by haploinsufficiency of TBX1, but its variable expressivity indicates the involvement of additional modifiers. Here, we report that absence of the Vegf164 isoform caused birth defects in mice, reminiscent of those found in del22q11 patients. The close correlation of birth and vascular defects indicated that vascular dysgenesis may pathogenetically contribute to the birth defects. Vegf interacted with Tbx1, as Tbx1 expression was reduced in Vegf164-deficient embryos and knocked-down vegf levels enhanced the pharyngeal arch artery defects induced by tbx1 knockdown in zebrafish. Moreover, initial evidence suggested that a VEGF promoter haplotype was associated with an increased risk for cardiovascular birth defects in del22q11 individuals. These genetic data in mouse, fish and human indicate that VEGF is a modifier of cardiovascular birth defects in the del22q11 syndrome.
journal_name
Nat Medjournal_title
Nature medicineauthors
Stalmans I,Lambrechts D,De Smet F,Jansen S,Wang J,Maity S,Kneer P,von der Ohe M,Swillen A,Maes C,Gewillig M,Molin DG,Hellings P,Boetel T,Haardt M,Compernolle V,Dewerchin M,Plaisance S,Vlietinck R,Emanuel B,Gittenbdoi
10.1038/nm819keywords:
subject
Has Abstractpub_date
2003-02-01 00:00:00pages
173-82issue
2eissn
1078-8956issn
1546-170Xpii
nm819journal_volume
9pub_type
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