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EPHB4 kinase-inactivating mutations cause autosomal dominant lymphatic-related hydrops fetalis.

Martin-Almedina, S; Martinez-Corral, I; Holdhus, R; Vicente, A; Fotiou, E; Lin, S; Petersen, K; Simpson, MA; Hoischen, A; Gilissen, C; et al. Martin-Almedina, S; Martinez-Corral, I; Holdhus, R; Vicente, A; Fotiou, E; Lin, S; Petersen, K; Simpson, MA; Hoischen, A; Gilissen, C; Jeffery, H; Atton, G; Karapouliou, C; Brice, G; Gordon, K; Wiseman, JW; Wedin, M; Rockson, SG; Jeffery, S; Mortimer, PS; Snyder, MP; Berland, S; Mansour, S; Makinen, T; Ostergaard, P (2016) EPHB4 kinase-inactivating mutations cause autosomal dominant lymphatic-related hydrops fetalis. Journal of Clinical Investigation, 126 (8). pp. 3080-3088. ISSN 1558-8238 https://doi.org/10.1172/JCI85794
SGUL Authors: Jeffery, Stephen Mortimer, Peter Sydney Ostergaard, Pia Mansour, Sahar Martin Almedina, Silvia

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Abstract

Hydrops fetalis describes fluid accumulation in at least 2 fetal compartments, including abdominal cavities, pleura, and pericardium, or in body tissue. The majority of hydrops fetalis cases are nonimmune conditions that present with generalized edema of the fetus, and approximately 15% of these nonimmune cases result from a lymphatic abnormality. Here, we have identified an autosomal dominant, inherited form of lymphatic-related (nonimmune) hydrops fetalis (LRHF). Independent exome sequencing projects on 2 families with a history of in utero and neonatal deaths associated with nonimmune hydrops fetalis uncovered 2 heterozygous missense variants in the gene encoding Eph receptor B4 (EPHB4). Biochemical analysis determined that the mutant EPHB4 proteins are devoid of tyrosine kinase activity, indicating that loss of EPHB4 signaling contributes to LRHF pathogenesis. Further, inactivation of Ephb4 in lymphatic endothelial cells of developing mouse embryos led to defective lymphovenous valve formation and consequent subcutaneous edema. Together, these findings identify EPHB4 as a critical regulator of early lymphatic vascular development and demonstrate that mutations in the gene can cause an autosomal dominant form of LRHF that is associated with a high mortality rate.

Item Type: Article
Additional Information: © 2016 American Society for Clinical Investigation. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles under the "fair use" limitations of US copyright law.
Keywords: Immunology, 11 Medical And Health Sciences
SGUL Research Institute / Research Centre: Academic Structure > Molecular and Clinical Sciences Research Institute (MCS)
Academic Structure > Molecular and Clinical Sciences Research Institute (MCS) > Cell Sciences (INCCCS)
Journal or Publication Title: Journal of Clinical Investigation
ISSN: 1558-8238
Language: ENG
Dates:
DateEvent
11 July 2016Published
9 May 2016Accepted
Publisher License: Publisher's own licence
Projects:
Project IDFunderFunder ID
SP/13/5/30288British Heart Foundationhttp://dx.doi.org/10.13039/501100000274
FS/11/40/28739British Heart Foundationhttp://dx.doi.org/10.13039/501100000274
FS/15/39/31526British Heart Foundationhttp://dx.doi.org/10.13039/501100000274
PG/10/58/28477British Heart Foundationhttp://dx.doi.org/10.13039/501100000274
12-13/01Newlife Foundation for Disabled Childrenhttp://dx.doi.org/10.13039/501100000871
PubMed ID: 27400125
Go to PubMed abstract
URI: https://openaccess.sgul.ac.uk/id/eprint/108018
Publisher's version: https://doi.org/10.1172/JCI85794

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