Key result
Acute GPER1 activation increases urinary ATP excretion ~46% and enhances natriuresis via P2 receptors.
Why the study?
Does GPER1 activation prevent blood pressure increases and enhance natriuresis in female rodent models of estrogen deprivation?
Does GPER1 activation prevent blood pressure increases and enhance natriuresis in female rodent models of estrogen deprivation?
GPER1 activation prevents ovariectomy-induced blood pressure elevations and promotes natriuresis via the renal Cx30/ATP/P2Y2 receptor signaling pathway, providing mechanistic insight into estrogen-mediated blood pressure regulation.
Answers are grounded in this paper and cite their sources.
No immediate clinical implications; extends GPER1-Cx30/ATP/P2Y2 natriuresis pathway in female rats but leaves human relevance open.
Systemic GPER1 activation upregulated renal Cx30 and P2Y 2 receptor mRNA expression in ovariectomized rats, whereas genetic deletion of GPER1 downregulated renal Cx30 and P2Y 2 receptor mRNA expression in ovary-intact female mice. Acute renal medullary GPER1 activation enhances natriuresis and urinary ATP excretion in ovary-intact female rats. These findings indicate that GPER1 regulates the natriuretic Cx30/ATP/P2Y 2 receptor signaling pathway in the kidney, which may contribute to the blood pressure-lowering response to GPER1 activation.
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A 2025 study studied Ovariectomy-induced hypertension and salt sensitivity. G1 (GPER1 agonist) vs. Vehicle (0.02% dimethyl sulfoxide in saline) was evaluated on Urinary ATP excretion (increased by 46.49%, p=<0.05). Acute renal medullary GPER1 activation with G1 increased urinary ATP excretion by 46.49% and enhanced natriuresis in female rats, effects that were abolished by P2 receptor blockade.
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