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Capsaicin-sensitive sensory neurons regulate myocardial function and gene expression pattern of rat hearts: a DNA
Agnes Zvara1, Péter Bencsik, Gabriella Fodor
1Laboratory of Functional Genomics, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary.
Summary
Capsaicin-sensitive sensory nerves regulate cardiac function by altering gene expression in the heart. This study identifies specific genes affected by capsaicin, revealing new molecular mechanisms.
Area of Science:
- Cardiovascular Physiology
- Molecular Biology
- Neuroscience
Background:
- Capsaicin-sensitive sensory nerves influence cardiac function and adaptation to ischemic stress.
- The molecular mechanisms underlying these effects are not well understood.
Purpose of the Study:
- To investigate cardiac functional alterations and gene expression changes following capsaicin-induced sensory denervation.
- To identify specific genes regulated by capsaicin-sensitive sensory nerves in the heart.
Main Methods:
- Systemic capsaicin treatment in rats to induce sensory chemodenervation.
- DNA microarray analysis of 6400 genes in rat hearts.
- Real-time quantitative PCR for gene expression verification.
Main Results:
- Capsaicin pretreatment caused cardiac dysfunction, including elevated left ventricular end-diastolic pressure.
- Expression of 80 genes was altered, with 47 up-regulated and 33 down-regulated.
- Identified changes in genes such as vanilloid receptor-1, endothelial nitric oxide synthase, and matrix metalloproteinase-13.
Conclusions:
- Capsaicin-sensitive sensory nerves significantly regulate diverse neuronal and non-neuronal genes in the heart.
- These findings provide novel insights into the molecular basis of sensory nerve involvement in cardiac regulation.
- The identified genes may represent new targets for understanding cardiac adaptation and dysfunction.