title: Identification of new FOXP3 mutations and prenatal diagnosis of IPEX syndrome.
abstract: OBJECTIVE
  Molecular diagnosis and prenatal care of two pregnant women at risk of transmitting immunodysregulation, polyendocrinopathy, enteropathy X-linked (IPEX) syndrome.
  
  
  METHODS
  FOXP3 coding sequence and exon boundaries were analyzed in the two consultants and family members. Non-invasive sex determination and specific prenatal diagnosis was realized.
  
  
  RESULTS
  Following sequence analysis a new FOXP3 mutation was identified in each consultant. Sex diagnosis realized by amplification of Y sequences from the plasma of the two mothers revealed a male and a female fetus, respectively. Prenatal diagnosis showed that the male fetus was unaffected. The baby is now born and healthy. Subsequent ultrasound examinations confirmed the sex in the second pregnancy but unfortunately led to the diagnosis of a 69,XXX triploidy. The pregnancy was thus interrupted.
  
  
  CONCLUSIONS
  Two new FOXP3 mutations were identified and prenatal diagnosis could be proposed. Due to the rarity of the disease, clinical diagnosis is often considered with delay. Both patients reported here were already pregnant at the beginning of the genetic investigation and one had previously interrupted a male pregnancy for lack of diagnosis. When faced with children with severe refractory diarrhea, clinicians should entertain the possibility of IPEX.
authors.affiliation: Département de Génétique et Procréation, CHU de Grenoble, France.
authors.forename: Radu
authors.initials: R
authors.lastname: Harbuz
authors.forename: James
authors.initials: J
authors.lastname: Lespinasse
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Boulet
authors.forename: Christine
authors.initials: C
authors.lastname: Francannet
authors.forename: Isabelle
authors.initials: I
authors.lastname: Creveaux
authors.forename: Mariem
authors.initials: M
authors.lastname: Benkhelifa
authors.forename: Pierre-Simon
authors.initials: PS
authors.lastname: Jouk
authors.forename: Joël
authors.initials: J
authors.lastname: Lunardi
authors.forename: Pierre F
authors.initials: PF
authors.lastname: Ray
mesh_terms: D005260:Female; D051858:Forkhead Transcription Factors / Q000235:genetics* / Q000276:immunology; D040181:Genetic Diseases, X-Linked / Q000235:genetics* / Q000276:immunology; D014644:Genetic Variation; D006801:Humans; D007231:Infant, Newborn; D007410:Intestinal Diseases / Q000235:genetics* / Q000276:immunology; D008297:Male; D017354:Point Mutation; D016884:Polyendocrinopathies, Autoimmune / Q000235:genetics* / Q000276:immunology; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D012313:RNA / Q000737:chemistry / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D013577:Syndrome
chemical_list: C418974:FOXP3 protein, human; D051858:Forkhead Transcription Factors; D012313:RNA