Germline Loss-of-Function Mutations in EPHB4 Cause a Second Form of Capillary Malformation-Arteriovenous Malformation (CM-AVM2) Deregulating RAS-MAPK Signaling


Por: Amyere, M, Revencu, N, Helaers, R, Pairet, E, Baselga, E, Cordisco, M, Chung, W, Dubois, J, Lacour, JP, Martorell, L, Mazereeuw-Hautier, J, Pyeritz, RE, Amor, DJ, Bisdorff, A, Blei, F, Bombei, H, Dompmartin, A, Brooks, D, Dupont, J, Gonzalez-Enseat, MA, Frieden, I, Gerard, M, Kvarnung, M, Hanson-Kahn, AK, Hudgins, L, Leaute-Labreze, C, McCuaig, C, Metry, D, Parent, P, Paul, C, Petit, F, Phan, A, Quere, I, Salhi, A, Turner, A, Vabres, P, Vicente, A, Wargon, O, Watanabe, S, Weibel, L, Wilson, A, Willing, M, Mulliken, JB, Boon, LM, Vikkula, M

Publicada: 12 sep 2017
Resumen:
BACKGROUND: Most arteriovenous malformations (AVMs) are localized and occur sporadically. However, they also can be multifocal in autosomal-dominant disorders, such as hereditary hemorrhagic telangiectasia and capillary malformation (CM)-AVM. Previously, we identified RASA1 mutations in 50% of patients with CM-AVM. Herein we studied non-RASA1 patients to further elucidate the pathogenicity of CMs and AVMs. METHODS: We conducted a genome-wide linkage study on a CM-AVM family. Whole-exome sequencing was also performed on 9 unrelated CM-AVM families. We identified a candidate gene and screened it in a large series of patients. The influence of several missense variants on protein function was also studied in vitro. RESULTS: We found evidence for linkage in 2 loci. Whole-exome sequencing data unraveled 4 distinct damaging variants in EPHB4 in 5 families that cosegregated with CM-AVM. Overall, screening of EPHB4 detected 47 distinct mutations in 54 index patients: 27 led to a premature stop codon or splice-site alteration, suggesting loss of function. The other 20 are nonsynonymous variants that result in amino acid substitutions. In vitro expression of several mutations confirmed loss of function of EPHB4. The clinical features included multifocal CMs, telangiectasias, and AVMs. CONCLUSIONS: We found EPHB4 mutations in patients with multifocal CMs associated with AVMs. The phenotype, CM-AVM2, mimics RASA1-related CM-AVM1 and also hereditary hemorrhagic telangiectasia. RASA1-encoded p120RASGAP is a direct effector of EPHB4. Our data highlight the pathogenetic importance of this interaction and indicts EPHB4-RAS-ERK signaling pathway as a major cause for AVMs.

Filiaciones:
Amyere, M:
 Catholic Univ Louvain, Duve Inst, Human Mol Genet, Ave Hippocrate 74, B-1200 Brussels, Belgium

Revencu, N:
 Catholic Univ Louvain, Clin Univ St Luc, Ctr Human Genet, Brussels, Belgium

Helaers, R:
 Catholic Univ Louvain, Duve Inst, Human Mol Genet, Ave Hippocrate 74, B-1200 Brussels, Belgium

Pairet, E:
 Catholic Univ Louvain, Brussels, Belgium

Baselga, E:
 Hosp Santa Creu & Sant Pau, Dept Dermatol, Barcelona, Spain

Cordisco, M:
 Hosp Garrahan, Dept Dermatol, Buenos Aires, DF, Argentina

 Univ Rochester, Sch Med & Dent, Strong Hosp, Rochester, NY USA

Chung, W:
 Columbia Univ, Dept Pediat & Med, New York, NY USA

Dubois, J:
 St Justine Mother Child Univ Hosp, Dept Med Imaging, Montreal, PQ, Canada

Lacour, JP:
 Ctr Hosp Univ Nice, Serv Dermatol, Nice, France

Martorell, L:
 Hosp St Joan Deu, Genet Mol, Barcelona, Spain

Mazereeuw-Hautier, J:
 Hop Larrey, Ctr Reference Malad Rares Peau, Serv Dermatol, Toulouse, France

Pyeritz, RE:
 Univ Penn, Perelman Sch Med, Dept Med & Genet, Philadelphia, PA 19104 USA

Amor, DJ:
 Royal Childrens Hosp, Murdoch Childrens Res Inst, Victorian Clin Genet Serv, Parkville, Vic, Australia

Bisdorff, A:
 Columbia Univ, Dept Pediat & Med, New York, NY USA

 Lariboisiere Hosp, Dept Neuroradiol, Paris, France

Blei, F:
 Lenox Hill Hosp, Vasc Anomalies Program, New York, NY 10021 USA

Bombei, H:
 Univ Iowa, Dept Pediat, Carver Coll Med, Iowa City, IA 52242 USA

Dompmartin, A:
 Univ Caen Basse Normandie, CHU Caen, Dept Dermatol, Caen, France

Brooks, D:
 Wake Forest Sch Med, Dept Urol, Winston Salem, NC USA

Dupont, J:
 Univ Hosp Santa Maria, Paediat Dept, Genet Serv, Lisbon, Portugal

Gonzalez-Enseat, MA:
 Hosp San Juan Dios, Dept Dermatol, Barcelona, Spain

Frieden, I:
 Univ Calif San Francisco, Dept Dermatol, Sch Med, San Francisco, CA 94143 USA

Gerard, M:
 Univ Hosp, Dept Genet, Caen, France

Kvarnung, M:
 Karolinska Inst, Ctr Mol Med, Dept Mol Med & Surg, Stockholm, Sweden

Hanson-Kahn, AK:
 Stanford Univ, Sch Med, Dept Pediat, Div Med Genet, Stanford, CA 94305 USA

Hudgins, L:
 Stanford Univ, Sch Med, Dept Pediat, Div Med Genet, Stanford, CA 94305 USA

Leaute-Labreze, C:
 Hop Pellegrin Enfants, Bordeaux, France

McCuaig, C:
 Hop St Justine, Montreal, PQ, Canada

Metry, D:
 Texas Childrens Hosp, Dept Dermatol, Houston, TX 77030 USA

Parent, P:
 CHRU Hop Morvan, Dept Pediat & Genet Med, Brest, France

Paul, C:
 Paul Sabatier Univ, Dept Dermatol, Toulouse, France

Petit, F:
 Hop Jeanne Flandre, Serv Genet Clin, Lille, France

Phan, A:
 Claude Bernard Lyon Univ, Pediat Dermatol Unit, Lyon, France

 Hop Femme Mere Enfant, Hosp Civils Lyon, Lyon, France

Quere, I:
 Ctr Hosp Univ, Montpellier, France

Salhi, A:
 Fac Med, Dermatol, Algiers, Algeria

Turner, A:
 Sydney Childrens Hosp, Dept Med Genet, Randwick, NSW, Australia

Vabres, P:
 Ctr Hosp Univ Dijon, Serv Dermatol, Dijon, Bourgogne, France

Vicente, A:
 Hosp San Juan Dios, Dept Dermatol, Barcelona, Spain

Wargon, O:
 Univ New South Wales, Sch Womens & Childrens Hlth, Sydney Childrens Hosp, Dept Paediat Dermatol, Sydney, NSW, Australia

Watanabe, S:
 Univ Tokyo, Dept Plast & Reconstruct Surg, Hongo, Japan

Weibel, L:
 Univ Childrens Hosp Zurich, Dept Pediat Dermatol, Zurich, Switzerland

Wilson, A:
 Childrens Hosp New York, New York, NY USA

Willing, M:
 Univ Iowa, Hosp & Clin, Iowa City, IA USA

 Washington Univ, Dept Pediat, St Louis, MO 63130 USA

Boon, LM:
 Harvard Med Sch, Boston Childrens Hosp, Vasc Anomalies Ctr, Boston, MA USA

Vikkula, M:
 Catholic Univ Louvain, Duve Inst, Human Mol Genet, Ave Hippocrate 74, B-1200 Brussels, Belgium
ISSN: 00097322





CIRCULATION
Editorial
LIPPINCOTT WILLIAMS & WILKINS, TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA, Estados Unidos America
Tipo de documento: Article
Volumen: 136 Número: 11
Páginas: 1037
WOS Id: 000410062800009
ID de PubMed: 28687708
imagen Bronze, Green Accepted

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