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Endogenous estrogens increase postischemic hyperemia in the skin microcirculation
Vesna Stojanovic1, Fides Küng, Lukas E Spieker
1Cardiovascular Center, Department of Cardiology, University Hospital, Zürich, Switzerland.
Journal of Cardiovascular Pharmacology
|April 12, 2005
Summary
Endogenous estrogens significantly enhance the skin's microcirculation's response to post-ischemic hyperemia. This study demonstrates that elevated estrogen levels improve reactive hyperemia in the skin.
Area of Science:
- Vascular Biology
- Dermatology
- Endocrinology
Background:
- Estrogens play a crucial role in regulating vascular tone and skin structure.
- Understanding the impact of endogenous estrogens on skin microcirculation is essential for various physiological and pathological conditions.
Purpose of the Study:
- To investigate the effects of endogenous estrogens on the skin's microcirculation.
- To assess how hormonal stimulation influences skin blood flow dynamics.
Main Methods:
- Laser Doppler flowmetry was used to measure forearm skin blood flow in 32 healthy women undergoing in-vitro fertilization.
- Participants received hormonal treatment for 10-12 days, modulating endogenous estrogen levels.
- Measurements included basal skin blood flow and post-ischemic hyperemia response.
Main Results:
- Plasma estrogen levels significantly increased from baseline (132 pmol/L) to post-treatment (8471 pmol/L).
- Maximal hyperemic blood flow increased substantially from 353% to 516% after hormonal stimulation.
- Basal skin blood flow remained unchanged, indicating a specific effect on reactive hyperemia.
Conclusions:
- Endogenous estrogens enhance the post-ischemic hyperemic response in the skin microcirculation.
- This suggests a significant role for estrogens in modulating reactive hyperemia in the skin.