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Advanced cardiac morphogenesis does not require heart tube fusion.

Science (New York, N.Y.) | Sep 10, 2004

The bilateral cardiac mesoderm migrates from the lateral region of the embryo to the ventral midline, where it fuses to form the primitive heart tube. It is generally accepted that migration and fusion are essential for subsequent stages of cardiac morphogenesis. We present evidence that, in Foxp4 mutant embryonic mice, each bilateral heart-forming region is capable of developing into a highly differentiated four-chambered mammalian heart in the absence of midline fusion. These data demonstrate that left-right chamber specification, cardiac looping, septation, cardiac myocyte differentiation, and endocardial cushion formation are preprogrammed in the precardiac mesoderm and do not require midline positional identity or heart tube fusion.

Pubmed ID: 15361625 RIS Download

Mesh terms: Animals | Apoptosis | Atrial Natriuretic Factor | Basic Helix-Loop-Helix Transcription Factors | Body Patterning | Cell Differentiation | DNA-Binding Proteins | Endocardium | Endoderm | Forkhead Transcription Factors | Gene Targeting | Heart | Heart Atria | Heart Ventricles | In Situ Hybridization | Mesoderm | Mice | Morphogenesis | Mutation | Myocytes, Cardiac | Proto-Oncogene Proteins c-myc | Transcription Factors | Zebrafish Proteins

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Associated grants

  • Agency: NHLBI NIH HHS, Id: HL71589

Mouse Genome Informatics (Data, Gene Annotation)

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