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Beta1-adrenergic blockade augments pulsatile PTH secretion in humans
Claus P Schmitt1, Jennifer Obry, Reinhard Feneberg
1Departments of Pediatrics and Internal Medicine, University of Heidelberg, Heidelberg, Germany.
Journal of the American Society of Nephrology : JASN
|November 26, 2003
Summary
Sympathetic nervous system activity influences parathyroid hormone (PTH) release. Beta-1 adrenergic blockade increased PTH secretion by enhancing hormone burst mass, not rhythm.
Area of Science:
- Endocrinology
- Neuroendocrinology
- Physiology
Background:
- Pulsatile peptide hormone secretion is crucial for end-organ function.
- The role of sympathetic activity in regulating parathyroid hormone (PTH) pulsatile release is not fully understood.
Purpose of the Study:
- To investigate the hypothesis that sympathetic neuronal activity drives synchronous pulsatile PTH release.
- To determine the acute effects of beta-1 adrenergic receptor blockade on PTH secretion patterns.
Main Methods:
- Single-blinded study in nine healthy adults.
- Measurement of plasma PTH levels at 1-min intervals.
- Analysis of PTH secretion using deconvolution and Approximate Entropy statistics.
Main Results:
- Beta-1 adrenergic blockade with esmolol increased mean plasma PTH by 33%.
- This increase was driven by a preferential rise in pulsatile PTH secretion (129%), specifically augmented PTH burst mass (117%).
- Burst frequency and regularity of PTH fluctuations remained unchanged.
Conclusions:
- The sympathetic nervous system modulates pulsatile PTH secretion.
- Selective beta-1 adrenergic blockade acutely increases plasma PTH by augmenting burst mass, without altering release rhythmicity.