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Disease Markers
Volume 28, Issue 5, Pages 287-292
http://dx.doi.org/10.3233/DMA-2010-0703

Multiplex Ligation-Dependent Probe Amplification Analysis of GATA4 Gene Copy Number Variations in Patients with Isolated Congenital Heart Disease

Valentina Guida,1 Francesca Lepri,1 Raymon Vijzelaar,2 Andrea De Zorzi,3 Paolo Versacci,4 Maria Cristina Digilio,3 Bruno Marino,4 Alessandro De Luca,1 and Bruno Dallapiccola3

1Mendel Laboratory, Casa Sollievo della Sofferenza Hospital, IRCCS, San Giovanni Rotondo, Rome, Italy
2MRC Holland, Amsterdam, The Netherlands
3Bambino Gesù Children Hospital, IRCCS, Rome, Italy
4Division of Pediatric Cardiology, Department of Pediatrics, “Sapienza” University, Rome, Italy

Received 25 June 2010; Accepted 25 June 2010

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

GATA4 mutations are found in patients with different isolated congenital heart defects (CHDs), mostly cardiac septal defects and tetralogy of Fallot. In addition, GATA4 is supposed to be the responsible gene for the CHDs in the chromosomal 8p23 deletion syndrome, which is recognized as a malformation syndrome with clinical symptoms of facial anomalies, microcephaly, mental retardation, and congenital heart defects. Thus far, no study has been carried out to investigate the role of GATA4 copy number variations (CNVs) in non-syndromic CHDs. To explore the possible occurrence of GATA4 gene CNVs in isolated CHDs, we analyzed by multiplex ligation-dependent probe amplification (MLPA) a cohort of 161 non-syndromic patients with cardiac anomalies previously associated with GATA4 gene mutations. The patients were mutation-negative for GATA4, NKX2.5, and FOG2 genes after screening with denaturing high performance liquid chromatography. MLPA analysis revealed that normalized MLPA signals were all found within the normal range values for all exons in all patients, excluding a major contribution of GATA4 gene CNVs in CHD pathogenesis.