Effect of testosterone on plaque development and androgen receptor expression in the arterial vessel wall
View abstract on PubMed
Summary
This summary is machine-generated.Testosterone protects the arterial vascular system by inhibiting neointimal plaque development. This effect is linked to increased vascular androgen receptor mRNA, suggesting a key role for androgens in vascular health.
Area Of Science
- Cardiovascular Biology
- Endocrinology
- Vascular Medicine
Background
- Emerging evidence suggests testosterone offers arterial protection.
- Molecular mechanisms underlying testosterone's vascular effects remain largely unknown.
- Investigating testosterone's impact on neointimal hyperplasia and androgen receptor expression is crucial.
Purpose Of The Study
- To examine testosterone's influence on neointimal plaque formation.
- To assess the effect of testosterone on vascular androgen receptor expression.
Main Methods
- Neointimal plaque formation was induced in rabbit aortas via endothelial denudation.
- Aortic ring segments were cultured for 21 days with varying testosterone concentrations.
- Neointimal plaque size (intima/media ratio) and androgen receptor mRNA levels were quantified.
Main Results
- Testosterone significantly inhibited neointimal plaque development at 10 ng/mL and 100 ng/mL.
- A 50% increase in androgen receptor mRNA was observed in testosterone-treated arterial segments.
- These findings correlate testosterone's plaque-inhibitory effects with androgen receptor expression.
Conclusions
- Testosterone exhibits beneficial effects on post-injury plaque development in the male vascular system.
- Androgens, via the vascular androgen receptor, play a significant role in these protective processes.
- Further research is needed to elucidate androgen receptor-dependent pathways in vascular regulation.