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Title: Cardiovascular autonomic dysfunction in primary ovarian insufficiency: clinical and experimental evidence
Authors: GOLDMEIER, SilviaANGELIS, Katia DeCASALI, Karina RabelloVILODRE, CesarCONSOLIM-COLOMBO, FernandaKLEIN, Adriane BelloPLENTZ, RodrigoSPRITZER, PoliMaraIRIGOYEN, Maria-Claudia
Citation: AMERICAN JOURNAL OF TRANSLATIONAL RESEARCH, v.6, n.1, p.91-101, 2014
Abstract: Objective: Women with primary ovarian insufficiency (POI) present an increased risk for cardiovascular disease. In this study we tested the hypothesis that POI in women under hormone therapy (HT) are associated with vascular vasodilatation attenuation and cardiovascular autonomic dysfunction and these impairments are related to changes in systemic antioxidant enzymes. Furthermore, the possibility that ovarian hormone deprivation can induce such changes and that HT cannot reverse all of those impairments was examined in an experimental model of POI. Methods: Fifteen control and 17 patients with primary ovarian insufficiency receiving HT were included in the study. To test the systemic and cardiac consequences of ovarian hormone deprivation, ovariectomy was induced in young female rats that were submitted or not to HT. Spectral analysis of RR interval and blood pressure signals were performed and oxidative stress parameters were determined. Results: POI women under HT have increased mean arterial pressure (94 +/- 10 vs. 86 +/- 5 mmHg) despite normal endothelial and autonomic modulation of vasculature. Additionally, they presented impaired baroreflex sensitivity (3.9 +/- 1.38 vs. 7.15 +/- 3.62 ms/mmHg) and reduced heart rate variability (2310 +/- 1173 vs. 3754 +/- 1921 ms(2)). Similar results obtained in ovariectomized female rats were accompanied by an increased lipoperoxidation (7433 +/- 1010 vs. 6180 +/- 289 cps/mg protein) and decreased antioxidant enzymes in cardiac tissue. As it was observed in women, the HT in animals did not restore hemodynamic and autonomic dysfunctions. Conclusion: These data provide clinical and experimental evidence that long term HT may not restore all cardiovascular risk factors associated with ovarian hormone deprivation.
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Artigos e Materiais de Revistas Científicas - HC/InCor
Instituto do Coração - HC/InCor

Artigos e Materiais de Revistas Científicas - LIM/59
LIM/59 - Laboratório de Biologia Celular

Artigos e Materiais de Revistas Científicas - ODS/03
ODS/03 - Saúde e bem-estar

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