Involvement of hyperprolinemia in cognitive and psychiatric features of the 22q11 deletion syndrome - Archive ouverte HAL
Article Dans Une Revue Human Molecular Genetics Année : 2007

Involvement of hyperprolinemia in cognitive and psychiatric features of the 22q11 deletion syndrome

Gregory Raux
  • Fonction : Auteur
Emilie Bumsel
  • Fonction : Auteur
Bernadette Hecketsweiler
  • Fonction : Auteur
Therese Van Amelsvoort
  • Fonction : Auteur
Janneke Zinkstok
  • Fonction : Auteur
Georges-Marie M. Breviere
  • Fonction : Auteur
Giuseppina Pustorino
  • Fonction : Auteur
Annick Vogels
  • Fonction : Auteur
Ann Swillen
  • Fonction : Auteur
Jacqueline Bou
  • Fonction : Auteur
Gaelle Opolczynski
  • Fonction : Auteur
Marie Lemarchand
  • Fonction : Auteur
Aude Gerard-Desplanches
  • Fonction : Auteur
Michèle Carlier
Anne Philippe
Marie Christine Nolen
  • Fonction : Auteur
Cyril Coizet
  • Fonction : Auteur
Alexandra Afenjar
  • Fonction : Auteur
  • PersonId : 902592
Florence Thibaut
  • Fonction : Auteur
  • PersonId : 829758

Résumé

Microdeletions of the 22q11 region, responsible for the velo-cardio-facial syndrome (VCFS), are associated with an increased risk for psychosis and mental retardation. Recently, it has been shown in a hyperprolinemic mouse model that an interaction between two genes localized in the hemideleted region, proline dehydrogenase (PRODH) and catechol-o-methyl-transferase (COMT), could be involved in this phenotype. Here, we further characterize in eight children the molecular basis of type I hyperprolinemia (HPI), a recessive disorder resulting from reduced activity of proline dehydrogenase (POX). We show that these patients present with mental retardation, epilepsy and, in some cases, psychiatric features. We next report that, among 92 adult or adolescent VCFS subjects, a subset of patients with severe hyperprolinemia has a phenotype distinguishable from that of other VCFS patients and reminiscent of HPI. Forward stepwise multiple regression analysis selected hyperprolinemia, psychosis and COMT genotype as independent variables influencing IQ in the whole VCFS sample. An inverse correlation between plasma proline level and IQ was found. In addition, as predicted from the mouse model, hyperprolinemic VCFS subjects bearing the Met-COMT low activity allele are at risk for psychosis (OR = 2.8, 95% CI = 1.04-7.4). Finally, from the extensive analysis of the PRODH gene coding sequence variations, it is predicted that POX residual activity in the 0-30% range results into HPI, whereas residual activity in the 30-50% range is associated either with normal plasma proline levels or with mild-to-moderate hyperprolinemia.

Domaines

Psychologie

Dates et versions

hal-01440622 , version 1 (19-01-2017)

Identifiants

Citer

Gregory Raux, Emilie Bumsel, Bernadette Hecketsweiler, Therese Van Amelsvoort, Janneke Zinkstok, et al.. Involvement of hyperprolinemia in cognitive and psychiatric features of the 22q11 deletion syndrome. Human Molecular Genetics, 2007, 16 (1), pp.83-91. ⟨10.1093/hmg/ddl443⟩. ⟨hal-01440622⟩
179 Consultations
0 Téléchargements

Altmetric

Partager

More