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An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause
Published on: August 13, 2019
Rapid estrogen actions in the cardiovascular system.
Tommaso Simoncini1, Paolo Mannella, Andrea Riccardo Genazzani
1Molecular and Cellular Gynecological Endocrinology Laboratory (MCGEL), Department of Reproductive Medicine and Child Development, Division of Gynecology and Obstetrics, University of Pisa, 56100 Pisa, Italy. t.simoncini@obgyn.med.unipi.it
Annals of the New York Academy of Sciences
|January 31, 2007
Summary
Nuclear receptors mediate rapid, nongenomic steroid hormone actions, particularly estrogens in the vascular wall. These non-transcriptional pathways are crucial for vascular health and disease, influencing vasodilation and inflammation.
Area of Science:
- Endocrinology
- Molecular Biology
- Vascular Biology
Background:
- Classical genomic mechanisms of steroid hormones involve gene transcription.
- Emerging evidence highlights rapid, non-transcriptional signaling pathways.
- Nuclear receptors mediate these rapid actions independently of protein synthesis.
Purpose of the Study:
- To review the role of nongenomic signaling of estrogens in nonreproductive tissues.
- To elucidate the importance of rapid steroid hormone actions in vascular function.
- To explore the interplay between nongenomic and genomic pathways.
Main Methods:
- Review of recent studies on nuclear receptor signaling.
- Analysis of literature on nongenomic estrogen effects in the vascular wall.
- Investigation of mechanisms underlying rapid steroid hormone actions.
Main Results:
- Nongenomic estrogen signaling is vital in the vascular wall, mediating vasodilation, anti-inflammatory effects, and endothelial cell stimulation.
- These rapid actions protect vessels from atherosclerotic degeneration.
- Nongenomic pathways modulate gene expression via signaling cascades, interacting with classical genomic mechanisms.
Conclusions:
- Nontranscriptional actions of steroid hormone receptors represent a critical signaling category.
- These newly recognized mechanisms are essential for steroid hormone functions in nonreproductive tissues, especially the vasculature.
- Further research into these rapid signaling pathways is warranted.
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