Changes in Aortic Valve Cells and Their Genes in Disease
Author Information
Author(s): Villa-Roel Nicolas, Park Christian, Andueza Aitor, Baek Kyung In, Su Ally, Blaser Mark C., Leshnower Bradley G., Yoganathan Ajit, Aikawa Elena, Jo Hanjoong
Primary Institution: Emory University and Georgia Institute of Technology
Hypothesis
The fibrosa side of the aortic valve is more prone to calcific aortic valve disease due to differences in cell types and gene expression.
Conclusion
The study found that valvular endothelial cells are heterogeneous and their gene expression varies significantly between the fibrosa and ventricularis sides of the aortic valve, especially in the context of calcific aortic valve disease.
Supporting Evidence
- 82,356 aortic valve cells were analyzed, revealing 27 distinct cell clusters.
- VEC clusters showed significant differences in gene expression patterns between the fibrosa and ventricularis sides.
- Homeostatic VIC clusters were more prevalent in non-diseased tissues, while pathogenic clusters increased with disease progression.
Takeaway
This study looked at heart valve cells to see how they change when people get sick, finding that one side of the valve is more affected than the other.
Methodology
Single-cell RNA sequencing was performed on endothelial-enriched samples from the fibrosa and ventricularis sides of human aortic valve leaflets from five donors.
Potential Biases
The study's findings may not be generalizable due to the limited demographic diversity of the donor samples.
Limitations
The study used a small number of male donors, and the sample with extensive calcification was the only one with significant disease.
Participant Demographics
Five male donors aged 36 to 60, with varying degrees of calcific aortic valve disease.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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