The use of DHPLC (Denaturing High Performance Liquid Chromatography) in II level screening of the CFTR gene in Prenatal Diagnosis

Mesoraca, Alvaro and Di Natale, Manuela and Cima, Antonella and Di Giacomo, Gianluca and Sarti, Monica and Barone, Maria Antonietta and Bizzocco, Domenico and Cignini, Pietro and Mobili, Luisa and D'Emidio, Laura and Giorlandino, Claudio (2010) The use of DHPLC (Denaturing High Performance Liquid Chromatography) in II level screening of the CFTR gene in Prenatal Diagnosis. Journal of prenatal medicine, 4 (3). pp. 45-50. ISSN 1971-3290

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Abstract

The aim of the study is to evaluate the role of Denaturing High Performance Liquid Chromatography (DHPLC) in the second level screening of the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene. Methods. A 9-month prospective study, between June 2008 and March 2009 at Artemisia Fetal Medical Centre, included 3829 samples of amniotic fluid collected from women undergoing mid-trimester amniocentesis. The genetic diagnosis of CF was based on research of the main mutations of the CFTR gene on fetal DNA extracted from the amniocytes, (first level screening) using different commercial diagnostic systems. A second level screening using DHPLC, on the amniotic fluid and on a blood sample from the couple, was offered in case of fetuses heterozygous at first level screening. Results. Of 3829 fetuses, 134 were found to be positive, 129 heterozygous and 5 affected. Of the 129 couples, following appropriate genetic counselling, 53 requested a second level screening. Through the use of DHPLC, 44 couples were found to be negative, and in nine couples, nine rare mutations were identified. Conclusions The first level screening can be useful to evidence up to 75% of the CF mutations. The second level screening can identify a further 10% of mutant alleles. DHPLC was found to be a reliable and specific method for the rapid identification of the rare CFTR mutations which were not revealed in initial first level screening.

Item Type:	Article
Uncontrolled Keywords:	CFTR, gene, cystic fibrosis, chromatography
Subjects:	600 Tecnologia - Scienze applicate > 610 Medicina e salute (Classificare qui la tecnologia dei servizi medici) > 618 Altri rami della medicina; Ginecologia e ostetricia, Pediatria, Geriatria > 618.2 Ostetricia
Depositing User:	Gianni Aiello
Date Deposited:	30 Apr 2013 10:36
Last Modified:	16 May 2013 12:26
URI:	http://eprints.bice.rm.cnr.it/id/eprint/5061

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