Cited by 124Hormonal Regulation and HypertensionRenin-Angiotensin System StudiesBlood Pressure and Hypertension Studies

Mechanism of Salt-Sensitive Hypertension: Focus on Adrenal and Sympathetic Nervous Systems

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Fujita, Toshiro·2014·Journal of the American Society of Nephrology

Abstract

A central role for the kidney among the systems contributing to BP regulation and the development of hypertension has been proposed. Both the aldosterone/mineralocorticoid receptor pathway and the renal sympathetic nervous system have important roles in the regulation of renal excretory function and BP control, but the mechanisms underlying these processes have remained unclear. However, recent studies revealed the activation of two pathways in salt-sensitive hypertension. Notably, Rac1, a member of the Rho-family of small GTP binding proteins, was identified as a novel ligand-independent modulator of mineralocorticoid receptor activity. Furthermore, these studies point to crucial roles for the Rac1-mineralocorticoid receptor-NCC/ENaC and the renal β-adrenergic stimulant-glucocorticoid receptor-WNK4-NCC pathways in certain rodent models of salt-sensitive hypertension. The nuclear mineralocorticoid and glucocorticoid receptors may contribute to impaired renal excretory function and the resulting salt-sensitive hypertension by increasing sodium reabsorption at different tubular segments. This review provides an in-depth discussion of the evidence supporting these conclusions and considers the significance with regard to treating salt-sensitive hypertension and salt-induced cardiorenal injury.

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Crossref · 10.1681/asn.2013121258

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  • Rac1 stimulates mineralocorticoid receptor signalling, and Rac1 levels in renal epithelial cells are increased in obese rodents.

    “Racl stimulates MR signalling, and the levels of Racl in renal epithelial cells were increased in obese rodents.”
  • Rac1 inhibitors ameliorated proteinuria and kidney injury in obese rodents and in rodents with salt-sensitive hypertension.

    “In addition, Racl inhibitors amelio-rated proteinuria and kidney injury in obese rodents and in rodents with salt-sensitive hypertension82.”
  • Obesity causes mineralocorticoid receptor activation independent of aldosterone or angiotensin II.

    “However, obesity also causes mineralocorticoid receptor activation independent of aldosterone or angiotensin II.”
  • BP reductions after MR antagonism in obese patients with resistant hypertension occurred despite concurrent therapy with ACE inhibitors or ARBs, suggesting that MR activation in obesity can occur independently of AngII-mediated stimulation of aldosterone secretion.

    “BP reductions after MR antagonism in obese patients with resistant hypertension occurred despite concurrent therapy with ACE inhibitors or ARBs, suggesting that MR activation in obesity can occur independently of AngII-mediated stimulation of aldosterone secretion54.”

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Authors
Fujita, T.
Affiliations
Research Center for Advanced Science and Technology, The University of Tokyo (JP)
Corresponding author
Fujita, Toshiro
Venue
Journal of the American Society of Nephrology
Published
2014-06
Volume
25
Issue
6
Pages
1148-1155
ISSN
1046-6673 (ISSN-L)
OpenAlex
W2157066558
Cited by
124
References
89
Citations by year
2026: 2 · 2025: 10 · 2024: 8 · 2023: 11 · 2022: 12 · 2021: 7 · 2020: 12 · 2019: 16 · 2018: 11 · 2017: 15 · 2016: 6 · 2015: 10 · 2014: 3 · 2013: 1
FWCI
1.80
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Society of Nephrology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (26670426, 24659410, 21229012)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal Regulation and Hypertension
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Renin-Angiotensin System Studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
Keywords
salt-sensitive hypertension, mineralocorticoid receptor, glucocorticoid receptor, Rac1, WNK4, sodium chloride cotransporter, epithelial sodium channel, renal sodium reabsorption, renal excretory function, renal sympathetic nervous system, aldosterone, Rho GTPases, blood pressure regulation
MeSH terms
Animals, Blood Pressure, Humans, Hypertension, Renal, Kidney, Sympathetic Nervous System, Sodium Chloride, Dietary

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