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Genetic characterisation of circulating fetal cells allows non-invasive prenatal diagnosis of cystic fibrosis.
Saker, Ali; Benachi, Alexandra; Bonnefont, Jean Paul; Munnich, Arnold; Dumez, Yves; Lacour, Bernard; Paterlini-Brechot, Patrizia.
Afiliación
  • Saker A; INSERM, Unité 807, Paris, France, Université Réné Descartes, Paris, France.
Prenat Diagn ; 26(10): 906-16, 2006 Oct.
Article en En | MEDLINE | ID: mdl-16832834
OBJECTIVES: Cystic fibrosis (CF) is an autosomal recessive disease due to mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. The purpose of this study was to develop a molecular method to characterise both paternal and maternal CFTR alleles in DNA from circulating fetal cells (CFCs) isolated by ISET (isolation by size of epithelial tumour/trophoblastic cells). METHODS: The molecular protocol was defined by developing the F508del mutation analysis and addressing it both to single trophoblastic cells, isolated by ISET and identified by short tandem repeats (STR) genotyping, and to pooled trophoblastic genomes, thus avoiding the risk of allele drop out (ADO). This protocol was validated in 100 leucocytes from F508del carriers and subsequently blindly applied to the blood (5 mL) of 12 pregnant women, at 11 to 13 weeks of gestation, whose offspring had a 1/4 risk of CF. Ten couples were carriers of F508del mutation, while two were carriers of unknown CFTR mutations. RESULTS: Results showed that one fetus was affected, seven were heterozygous carriers of a CFTR mutation, and four were healthy homozygotes. These findings were consistent with those obtained by chorionic villus sampling (CVS). CONCLUSION: Our data show that the ISET-CF approach affords reliable prenatal diagnosis (PND) of cystic fibrosis and is potentially applicable to pregnant women at risk of having an affected child, thus avoiding the risk of iatrogenic miscarriage.
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Diagnóstico Prenatal / Pruebas Genéticas / Regulador de Conductancia de Transmembrana de Fibrosis Quística / Fibrosis Quística / Feto Tipo de estudio: Diagnostic_studies / Guideline / Prognostic_studies Límite: Female / Humans / Pregnancy Idioma: En Revista: Prenat Diagn Año: 2006 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Diagnóstico Prenatal / Pruebas Genéticas / Regulador de Conductancia de Transmembrana de Fibrosis Quística / Fibrosis Quística / Feto Tipo de estudio: Diagnostic_studies / Guideline / Prognostic_studies Límite: Female / Humans / Pregnancy Idioma: En Revista: Prenat Diagn Año: 2006 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido