Chromosomal Imbalances in Patients with Congenital Cardiac Defects: a Meta-Analysis Reveals Novel Potential Critical Regions Involved in Heart Development
193 ORIGINAL ARTICLES Chromosomal Imbalances in Patients with Congenital Cardiac Defects: A Meta-analysis Reveals Novel Potential Critical Regions Involved in Heart Development Thor Thorsson, MD,* William W. Russell,* Nour El-Kashlan,* Rachel Soemedi, PhD,† Jonathan Levine,* Sarah B. Geisler, MS,* Todd Ackley, PhD,‡ Aoy Tomita-Mitchell, PhD,§ Jill A. Rosenfeld, MS, CGC,¶ Ana Töpf, PhD,** Marwan Tayeh, PhD,‡ Judith Goodship, PhD,** Jeffrey W. Innis, MD, PhD,‡†† Bernard Keavney, MD,‡‡ and Mark W. Russell, MD* Department of Pediatrics and Communicable Diseases, Divisions of *Pediatric Cardiology and ‡Pediatric Genetics, University of Michigan, Ann Arbor, Mich, USA; †Center for Computational Molecular Biology, Brown University, Providence, RI, USA; §Department of Surgery, Medical College of Wisconsin, Milwaukee, Wis, USA; ¶Signature Genomic Laboratories, PerkinElmer, Inc., Spokane, Wash, USA; **Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom; ††Department of Human Genetics, University of Michigan, Ann Arbor, Mich, USA; ‡‡Institute of Cardiovascular Sciences, Central Manchester University, Manchester, United Kingdom ABSTRACT Objective. Congenital cardiac defects represent the most common group of birth defects, affecting an estimated six per 1000 births. Genetic characterization of patients and families with cardiac defects has identified a number of genes required for heart development. Yet, despite the rapid pace of these advances, mutations affecting known genes still account for only a small fraction of congenital heart defects suggesting that many more genes and developmental mechanisms remain to be identified. Design. In this study, we reviewed 1694 described cases of patients with cardiac defects who were determined to have a significant chromosomal imbalance (a deletion or duplication). The cases were collected from publicly available databases (DECIPHER, ISCA, and CHDWiki) and from recent publications.
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