Article

Genetic regulation of cardiogenesis and congenital heart disease

Gladstone Institute of Cardiovascular Disease, Department of Pediatrics, University of California, San Francisco, California 94158, USA.
Annual Review of Pathology Mechanisms of Disease (Impact Factor: 18.75). 02/2006; 1(1):199-213. DOI: 10.1146/annurev.pathol.1.110304.100039
Source: PubMed

ABSTRACT

Developmental heart disorders are the most common of all human birth defects and occur in nearly one percent of the population. Survivors of congenital heart malformations are an increasing population, and it is becoming clear that genetic mutations that cause developmental anomalies may result in cardiac dysfunction later in life. This review highlights the progress in understanding the underlying molecular basis for cardiac formation and how disruption of the intricate steps of cardiogenesis can lead to congenital heart defects. The lessons learned from examining the early steps of heart formation are essential for informing the prevention of malformations and their long-term consequences, as well as for approaches to guide stem cells into cardiac lineages.

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    • "Mammalian heart development is a tightly regulated process requiring exquisite control of transcriptional programs. Consistent with this idea, disruption of transcriptional networks underpins congenital heart disease (CHD) and certain forms of adult cardiac disease (Bruneau, 2008; Srivastava, 2006a). In fact, heart disease is the leading cause of morbidity and mortality worldwide (WHO 2011) with dramatic effects on the life quality of patients as well as on the health care system. "
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    ABSTRACT: Cardiogenesis in mammals requires exquisite control of gene expression and faulty regulation of transcriptional programs underpins congenital heart disease (CHD), the most common defect among live births. Similarly, many adult cardiac diseases involve transcriptional changes and sometimes have a developmental basis. Long non-coding RNAs (lncRNAs) are a novel class of transcripts that regulate cellular processes by controlling gene expression; however, detailed insights into their biological and mechanistic functions are only beginning to emerge. Here, we discuss recent findings suggesting that lncRNAs are important factors in regulation of mammalian cardiogenesis and in the pathogenesis of CHD as well as adult cardiac disease. We also outline potential methodological and conceptual considerations for future studies of lncRNAs in the heart and other contexts.
    Full-text · Article · Jun 2013 · The EMBO Journal
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    • "Heart formation is a complex morphogenetic process involving specification, differentiation, and migration of cardiac progenitor cells. Defects in this program are responsible for the high rate of congenital cardiac abnormalities in humans underscoring the importance of understanding the molecular mechanisms regulating cardiogenesis (Bruneau, 2008; Srivastava, 2006a). Using different model systems, including Drosophila, Xenopus, zebrafish , chick, and mouse, substantial progress has been made to unveil the principal mechanisms and the key molecular players driving heart development. "
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    ABSTRACT: Morphogenesis of the heart requires tight control of cardiac progenitor cell specification, expansion, and differentiation. Retinoic acid (RA) signaling restricts expansion of the second heart field (SHF), serving as an important morphogen in heart development. Here, we identify the LIM domain protein Ajuba as a crucial regulator of the SHF progenitor cell specification and expansion. Ajuba-deficient zebrafish embryos show an increased pool of Isl1(+) cardiac progenitors and, subsequently, dramatically increased numbers of cardiomyocytes at the arterial and venous poles. Furthermore, we show that Ajuba binds Isl1, represses its transcriptional activity, and is also required for autorepression of Isl1 expression in an RA-dependent manner. Lack of Ajuba abrogates the RA-dependent restriction of Isl1(+) cardiac cells. We conclude that Ajuba plays a central role in regulating the SHF during heart development by linking RA signaling to the function of Isl1, a key transcription factor in cardiac progenitor cells.
    Preview · Article · Jul 2012 · Developmental Cell
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    • "Genetic ablation of many of these components in mice leads to developmental pathologies that are similar to those that form in humans with congenital heart defects (Srivastava, 2006). Extracellular matrix (ECM)-regulated adhesion and signaling pathways are also important for normal heart development . "
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    ABSTRACT: Morphogenesis of the heart is regulated by various cues, including growth factors and extracellular matrix (ECM) proteins. The mechanisms by which cardiac cells properly integrate these cues to regulate growth, differentiation, and migration remain poorly understood. Here we have used genetic strategies in mice to identify αvβ8 integrin and its cytoskeletal adaptor protein, Band 4.1B, as essential regulators of cardiac morphogenesis. We demonstrate that approximately 60% of mouse embryos genetically null for β8 integrin and Band 4.1B display cardiovascular phenotypes and die by E11.5. This premature death is due, in part, to defective development of the cardiac outflow tract (OFT), with reduced expression of smooth muscle α-actin (SMAα-actin) in OFT cells derived from the cardiac neural crest. These data are the first to identify cell adhesion and signaling pathways regulated by αvβ8 integrin and Band 4.1B as essential for normal formation and function of the heart during embryogenesis.
    Full-text · Article · Jan 2011 · Developmental Dynamics
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