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Bilateral periventricular nodular heterotopia in France: frequency of mutations in FLNA, phenotypic heterogeneity and spectrum of mutations
  1. G Solé1,2,
  2. I Coupry1,
  3. C Rooryck1,3,
  4. E Guérineau1,
  5. F Martins1,
  6. S Devés3,
  7. C Hubert1,
  8. N Souakri1,
  9. O Boute4,
  10. C Marchal2,
  11. L Faivre5,
  12. E Landré6,
  13. S Debruxelles2,
  14. A Dieux-Coeslier4,
  15. C Boulay7,
  16. S Chassagnon8,
  17. V Michel2,
  18. M-C Routon9,
  19. A Toutain10,
  20. N Philip11,
  21. D Lacombe1,3,
  22. L Villard12,
  23. B Arveiler1,3,
  24. C Goizet1,2,3
  1. 1
    Université Victor Segalen Bordeaux 2, Laboratoire de Génétique Humaine, Bordeaux, France
  2. 2
    CHU Bordeaux, Fédération des Neurosciences Cliniques, Hôpital Pellegrin, Bordeaux, France
  3. 3
    CHU Bordeaux, Service de Génétique Médicale, Hôpital Pellegrin-Enfants, Bordeaux, France
  4. 4
    CHU Lille, Service de Génétique Clinique, Hôpital Jeanne de Flandre, Lille, France
  5. 5
    CHU Dijon, Centre de Génétique, Hôpital d’Enfants, Dijon, France
  6. 6
    CHU Cochin Port-Royal, Centre de Neurochirurgie, Hôpital Sainte-Anne, Paris, France
  7. 7
    CH Mulhouse, Service de Neurologie et d’Explorations Fonctionnelles du Système Nerveux et Neuro-musculaire, Mulhouse, France
  8. 8
    CHU Strasbourg, Département de Neurologie, Strasbourg, France
  9. 9
    CHG d’Orsay, Service de Pédiatrie et de Néonatologie, Orsay, France
  10. 10
    CHU Tours, Service de Génétique Médicale, Hôpital Bretonneau, Tours, France
  11. 11
    APHM Marseille, Département de Génétique Médicale, Hôpital Timone-Enfants, Marseille, France
  12. 12
    INSERM U910, Faculté de Médecine de La Timone, Marseille, France
  1. Correspondence to Dr C Goizet, Laboratoire de Génétique Humaine, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux cedex, France; cyril.goizet{at}u-bordeaux2.fr

Abstract

Bilateral periventricular nodular heterotopia (BPNH) is the most common form of periventricular heterotopia. Mutations in FLNA, encoding filamin A, are responsible for the X linked dominant form of BPNH (FLNA-BPNH). Recently, atypical phenotypes including BPNH with Ehlers–Danlos syndrome (BPNH-EDS) have been recognised. A total of 44 FLNA mutations have so far been reported in this phenotype. Most of these mutations lead to a truncated protein, but few missense mutations have also been described. Here, the results of a mutation screening conducted in a series of 32 BPNH patients with the identification of 12 novel point mutations in 15 patients are reported. Nine mutations were truncating, while three were missense. Three additional patients with BPNH-EDS and a mutation in FLNA are described. No phenotype–genotype correlations could be established, but these clinical data sustain the importance of cardiovascular monitoring in FLNA-BPNH patients.

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Footnotes

  • ▸ Additional tables are published online only at http://jnnp.bmj.com/content/vol80/issue12

  • GS and IC contributed equally to this work.

  • Funding This work was supported by GIS (projects no 04/59 and 05/46) and from the Programme Hospitalier de Recherche Clinique national no 04/07, the Institut des Maladies Rares, INSERM, the Ministère de l’Enseignement Supérieur et de la Recherche and the Ministère de la Santé. The experimental work was performed on the Plateforme Génotypage Séquençage (PGS) of Bordeaux. The PGS was constituted thanks to grants from the Conseil Régional d’Aquitaine (no 20030304002FA and no 20040305003FA) and from the FEDER (no 2003227).

  • Competing interests None.

  • Patient consent Obtained.

  • Provenance and Peer review Not commissioned; externally peer reviewed.

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