Sphingosine-1-phosphate receptor 1 and cardiac development
Author Information
Author(s): Ryan R. Poulsen, Carolyn M. McClaskey, Scott A. Rivkees, Christopher C. Wendler
Primary Institution: Yale University School of Medicine
Hypothesis
S1P1R is critical for cardiac development and mediates S1P action during this process.
Conclusion
Loss of S1P1R expression leads to malformed embryonic hearts due to reduced fibronectin expression and decreased cell proliferation.
Supporting Evidence
- S1P1R was expressed at least 10-fold higher than other S1P receptors in the developing heart.
- S1P1R-/- hearts were malformed with reduced myocardial tissue.
- Loss of S1P1R expression led to reduced fibronectin deposition in the heart.
- S1P1R-/- myocardial cells had a reduction in cell proliferation of 33%.
- Altered S1P signaling disrupts cell morphology and cell survival in cardiac cushion tissue.
Takeaway
S1P1R helps the heart grow properly, and without it, the heart doesn't develop right.
Methodology
Real-time PCR and immunohistochemical analysis were used to assess S1P1R expression and its effects on cardiac development in mouse embryos.
Limitations
The study primarily focuses on the role of S1P1R without exploring potential compensatory mechanisms from other S1P receptors.
Participant Demographics
C57Bl/6 mice were used for the experiments.
Statistical Information
P-Value
p ≤ 0.02
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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