Cited by 42Renin-Angiotensin System StudiesParathyroid Disorders and TreatmentsEicosanoids and Hypertension Pharmacology

Parathyroid Hormone and Calcium: Interactions in the Control of Renin Secretion in the Isolated, Nonfiltering Rat Kidney*

HELWIG, JEAN-JACQUES, MUSSO, MARIE-JOSE, JUDES, CLEMENT, NICKOLS, G. ALLEN·1991·Endocrinology

Abstract

The present study was designed to characterize the interaction of calcium and PTH in the control of renin release in isolated rat kidneys perfused in a closed circuit at constant flow. Kidneys were rendered nonfiltering using low perfusion pressures (70 mm Hg) and a hyperoncotic perfusate (100 g/liter BSA). Under these conditions, differences in perfusion pressure were less than 9 mm Hg between control and PTH-treated kidneys over the 50 min of perfusion. In the absence of PTH, renin release was inversely correlated with ionized calcium (Ca2+) concentration, with the highest release of renin noted with 1 mM EGTA and no added calcium. Also, verapamil treatment markedly elevated renin release, even in the presence of 2 mM Ca2+. In contrast, renin secretion was strongly depressed by 20 nM BAY-K8644 in the perfusate. In medium containing normal calcium concentrations (1 mM Ca2+), rat PTH(1-34) induced a 2-fold greater renin accumulation than in the control, non-PTH-treated kidneys. Isoproterenol induced a 5-fold stimulation under the same conditions. In the 0 Ca2+/1 mM EGTA perfusion, PTH did not elevate renin secretion. Renin release in response to PTH in 2 mM Ca2+ was similar to that observed in the 1 mM Ca2+ perfusion. PTH also reversed the effects of BAY-K8644 to suppress renin release. In verapamil-treated kidneys, PTH failed to stimulate renin release. These results indicate that PTH stimulates renin release by a process independent of the baroreceptors and macula densa. The Ca2+ modulation of PTH-induced renin release is consistent with the reported ability of PTH to block calcium channels and relax vascular smooth muscle.

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Crossref · 10.1210/endo-129-3-1233

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Authors
HELWIG, J.-J., MUSSO, M.-J., JUDES, C., & NICKOLS, G. A.
Affiliations
Monsanto (United States) (US)
Venue
Endocrinology
Published
1991-09
Volume
129
Issue
3
Pages
1233-1242
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2168728040
Cited by
42
References
0
Citations by year
2026: 2 · 2023: 2 · 2020: 6 · 2019: 3 · 2015: 2 · 2014: 1 · 2012: 3
FWCI
2.19
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Renin-Angiotensin System Studies
  • Health Sciences › Medicine › Nephrology › Parathyroid Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
parathyroid hormone, renin secretion, calcium, ionized calcium, verapamil, Bay K 8644, isoproterenol, calcium channels, baroreceptors, macula densa, vasorelaxation, teriparatide
MeSH terms
Animals, 3-Pyridinecarboxylic acid, 1,4-dihydro-2,6-dimethyl-5-nitro-4-(2-(trifluoromethyl)phenyl)-, Methyl ester, Calcium, Egtazic Acid, Isoproterenol, Kidney, Kinetics, Male, Parathyroid Hormone, Peptide Fragments, Perfusion, Rats, Inbred Strains, Renin, Verapamil, Teriparatide, Rats, In Vitro Techniques

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