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Published on: June 30, 2023
Androgens, angiogenesis and cardiovascular regeneration
Daniel P Sieveking1, Renée W Y Chow, Martin K C Ng
1Heart Research Institute, University of Sydney, Sydney, Australia.
Insights
Androgens play a crucial role in cardiovascular repair and regeneration by stimulating new blood vessel growth (angiogenesis). This finding has implications for therapeutic angiogenesis and androgen replacement therapies in aging men.
Area of Science:
- Cardiovascular Science
- Endocrinology
- Regenerative Medicine
Background:
- Significant sex differences exist in cardiovascular disease incidence and outcomes.
- While estrogen's role in angiogenesis is well-studied, androgen's role remains largely unexplored.
- Cardiovascular adaptation and repair following ischemia/infarction may involve intrinsic sex differences.
Purpose of the Study:
- To review the role of androgens in cardiovascular repair and regeneration.
- To explore the mechanisms by which androgens influence angiogenesis.
- To discuss the implications for therapeutic interventions.
Main Methods:
- Review of existing scientific literature on androgens, angiogenesis, and cardiovascular repair.
- Analysis of studies investigating androgen effects on vascular endothelial growth factor (VEGF) and erythropoietin.
- Examination of research on endothelial progenitor cells and hormonal regulation.
Main Results:
- Evidence suggests androgens are important for cardiovascular repair and regeneration.
- Androgens stimulate angiogenesis through VEGF-related pathways and erythropoietin production.
- Endothelial progenitor cells, key to angiogenesis, are targets of androgen action.
Conclusions:
- Androgens significantly contribute to cardiovascular repair and regeneration.
- Therapeutic angiogenesis and androgen replacement may benefit aging and hypogonadal men.
- Further research into androgen-mediated cardiovascular effects is warranted.
Purpose Of Review:
Striking sex differences exist not only in the incidence of cardiovascular disease, but also in the clinical outcomes. Although cardiovascular events occur earlier in men, in women, it appears they have poorer short-term and long-term outcomes following these events compared to men. Thus, intrinsic sex differences may exist not only in atherogenesis, but also with respect to cardiovascular adaptation/repair in response to ischemia and/or infarction. Angiogenesis, the growth of new blood vessels, is essential for organ development and is critical to cardiovascular repair/regeneration. Although the effect of estrogen on angiogenesis has been studied extensively, the role of androgens has remained largely unexplored.
Recent Findings:
Multiple lines of evidence now suggest an important role for androgens in cardiovascular repair and regeneration. Studies suggest that androgens stimulate angiogenesis via vascular endothelial growth factor-related mechanisms and by the stimulation of erythropoietin production. Furthermore, endothelial progenitor cells, important in angiogenesis, appear to be hormonally regulated and an important target of androgen action.
Summary:
Given the age-related decline in androgens, the findings discussed here have implications for therapeutic angiogenesis and androgen replacement therapies in aging and hypogonadal men.
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