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Imaging Cleared Embryonic and Postnatal Hearts at Single-cell Resolution
Published on: October 7, 2016
Advanced cardiac morphogenesis does not require heart tube fusion
Shanru Li1, Deying Zhou, Min Min Lu
1Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Science (New York, N.Y.)
|September 14, 2004
Summary
Cardiac development can proceed without midline fusion. Foxp4 mutant mice show that bilateral heart-forming regions can develop into a four-chambered heart independently, challenging previous assumptions.
Area of Science:
- Developmental biology
- Embryology
- Genetics
Background:
- Cardiac morphogenesis traditionally assumes midline fusion of bilateral mesoderm is crucial.
- The formation of the primitive heart tube involves migration and fusion of embryonic cardiac mesoderm.
Purpose of the Study:
- To investigate the necessity of midline fusion for cardiac development.
- To determine if cardiac chamber specification and differentiation can occur without heart tube fusion.
Main Methods:
- Utilized Foxp4 mutant embryonic mice models.
- Observed cardiac development in the absence of midline fusion.
Main Results:
- Bilateral heart-forming regions in Foxp4 mutants developed into differentiated four-chambered hearts without midline fusion.
- Key developmental processes like chamber specification, looping, and myocyte differentiation occurred independently.
Conclusions:
- Midline fusion is not essential for mammalian heart development.
- Cardiac development processes are preprogrammed in the precardiac mesoderm, independent of midline positional identity.
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