Cardiac Specific Overexpression of Serum Response Factor Alters Mitochondrial Structure and Function
2024
How Heart Protein Affects Mitochondria as We Age
Sample size: 12
publication
Evidence: moderate
Author Information
Author(s): Patyal Pankaj, Azhar Gohar, Verma Ambika, Zhang Xiaomin, Wei Jeanne Y
Primary Institution: University of Arkansas for Medical Sciences
Hypothesis
Cardiac specific overexpression of serum response factor alters mitochondrial function.
Conclusion
Increased serum response factor in the heart leads to mitochondrial abnormalities and functional decline.
Supporting Evidence
- Western blot analysis showed a significant increase in BNP, a marker for left ventricular cardiac hypertrophy.
- Electron microscopy revealed mitochondrial abnormalities.
- High-resolution respirometry indicated a significant decrease in mitochondrial respiratory chain complexes I-IV respiratory rates.
- Expression levels of PGC1α and PGC1β, markers for mitochondrial biogenesis, were reduced.
- Protein levels of Opa1 and DRP1, markers for mitochondrial fusion and fission, were significantly reduced.
Takeaway
When a certain protein in the heart is too high, it can mess up tiny parts of the cell that help make energy, especially as we get older.
Methodology
We used SRF transgenic mice and performed western blot analysis, electron microscopy, and high-resolution respirometry.
Statistical Information
P-Value
p < 0.01; p < 0.05
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website