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• W2964768044 abstract "Abstract: This study was aimed to clarify differences in how specific agonists of the 3 estrogen receptors (ERs) influence diastolic function and the renin–angiotensin system (RAS) after ovariectomy (OVX) in 24 female spontaneously hypertensive rat (SHR) undergoing bilateral OVX at 12 weeks of age. Eight weeks after surgery, rats were randomized (n = 6/group) to receive equipotent, daily treatments of one of the ER agonists (ERα agonist, propyl pyrazole trisphenol 94 μg/kg; ERβ agonist, diarylpropionitrile 58 μg/kg; G-protein–coupled estrogen receptor [GPER] agonist, G1 100 μg/kg), or vehicle (peanut oil). After 4 weeks of treatment, left ventricular function/structure and systemic/intracardiac pressure measurements were obtained by echocardiography and a fluid-filled catheter attached to a pressure transducer, respectively. Selective ER agonist treatment with G1 or propyl pyrazole trisphenol led to improvements in diastolic function after estrogen loss when compared with vehicle-treated OVX rats. Although mean arterial blood pressure was not overtly different among groups, chronic G1, but not the other ER ligands, enhanced the in vitro vasorelaxant responsiveness to acetylcholine in aortic rings. These favorable effects of G1 were further linked to reductions in cardiac angiotensin-converting enzyme activity, AT1R protein expression, and Ang II immunoreactivity. Activation of ERβ had no effect on cardiac function and did not alter components of the canonical cardiac RAS in comparison with vehicle-treated OVX SHR. These data imply that of the 3 ERs, GPER has a unique role in preserving diastolic function and favorably modulating the cardiac RAS independent of arterial pressure. Specifically, if GPER is pharmacologically activated, it could provide a therapeutic opportunity to limit the development and/or progression of diastolic dysfunction in hypertensive women after estrogen loss." @default.
• W2964768044 created "2019-08-13" @default.
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• W2964768044 date "2019-11-01" @default.
• W2964768044 modified "2023-10-12" @default.
• W2964768044 title "G-Protein–Coupled Estrogen Receptor Agonist G1 Improves Diastolic Function and Attenuates Cardiac Renin–Angiotensin System Activation in Estrogen-Deficient Hypertensive Rats" @default.
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• W2964768044 doi "https://doi.org/10.1097/fjc.0000000000000721" @default.
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