Angiotensin-Converting Enzyme Inhibition and Parathyroid Hormone Secretion

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Angiotensin-Converting Enzyme Inhibition and Parathyroid Hormone Secretion

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Title: Angiotensin-Converting Enzyme Inhibition and Parathyroid Hormone Secretion
Author: Zaheer, Sarah; Brown, Jenifer M.; Connors, Molly; Williams, Jonathan S.; Adler, Gail K.; Vaidya, Anand

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Citation: Zaheer, Sarah, Jenifer M. Brown, Molly Connors, Jonathan S. Williams, Gail K. Adler, and Anand Vaidya. 2017. “Angiotensin-Converting Enzyme Inhibition and Parathyroid Hormone Secretion.” International Journal of Endocrinology 2017 (1): 4138783. doi:10.1155/2017/4138783.
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Abstract: Background: Prior studies suggest that renin-angiotensin-aldosterone system (RAAS) inhibitors decrease parathyroid hormone (PTH) secretion. Objective: To evaluate the effect of angiotensin-converting enzyme inhibitors (ACEi) on serum PTH in participants with and without primary hyperparathyroidism (P-HPT). Methods: An open-label, single-arm, pilot study whereby participants with and without P-HPT had PTH were evaluated before and after 1 week of maximally tolerated lisinopril therapy. Results: A total of 12 participants with, and 15 participants without, P-HPT successfully completed the protocol. Following 1 week of lisinopril, participants with P-HPT had a decrease in systolic blood pressure (SBP) (−6.4 mmHg, P < 0.01), an increase in plasma renin activity (PRA) (+1.50 ng/mL/h, P = 0.06), and a decrease in PTH (79.5 (21.6) to 70.9 (19.6) pg/mL, ∆ = −8.6 pg/mL, P = 0.049); however, serum and urine calcium did not change. In contrast, although 1 week of lisinopril significantly decreased SBP and increased PRA among participants without P-HPT, there were no changes in PTH or calcium. Conclusion: In this short pilot investigation, 1 week of maximally titrated ACEi did not impact PTH in participants without P-HPT, but resulted in a modest and marginally significant reduction of PTH but not calcium, among participants with P-HPT. This trial is registered with NCT01691781.
Published Version: doi:10.1155/2017/4138783
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