Arap3 is dysregulated in a mouse model of hypotrichosis-lymphedema-telangiectasia and regulates lymphatic vascular development.

Abstract:

:Mutations in SOX18, VEGFC and Vascular Endothelial Growth Factor 3 underlie the hereditary lymphatic disorders hypotrichosis-lymphedema-telangiectasia (HLT), Milroy-like lymphedema and Milroy disease, respectively. Genes responsible for hereditary lymphedema are key regulators of lymphatic vascular development in the embryo. To identify novel modulators of lymphangiogenesis, we used a mouse model of HLT (Ragged Opossum) and performed gene expression profiling of aberrant dermal lymphatic vessels. Expression studies and functional analysis in zebrafish and mice revealed one candidate, ArfGAP with RhoGAP domain, Ankyrin repeat and PH domain 3 (ARAP3), which is down-regulated in HLT mouse lymphatic vessels and necessary for lymphatic vascular development in mice and zebrafish. We position this known regulator of cell behaviour during migration as a mediator of the cellular response to Vegfc signalling in lymphatic endothelial cells in vitro and in vivo. Our data refine common mechanisms that are likely to contribute during both development and the pathogenesis of lymphatic vascular disorders.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Kartopawiro J,Bower NI,Karnezis T,Kazenwadel J,Betterman KL,Lesieur E,Koltowska K,Astin J,Crosier P,Vermeren S,Achen MG,Stacker SA,Smith KA,Harvey NL,François M,Hogan BM

doi

10.1093/hmg/ddt518

subject

Has Abstract

pub_date

2014-03-01 00:00:00

pages

1286-97

issue

5

eissn

0964-6906

issn

1460-2083

pii

ddt518

journal_volume

23

pub_type

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