Cited by 61Hormonal Regulation and HypertensionSodium Intake and HealthRenin-Angiotensin System Studies

Pathophysiology of salt sensitivity hypertension

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Ando, Katsuyuki, Fujita, Toshiro·2012·Annals of Medicine

Abstract

Dietary salt intake is the most important factor contributing to hypertension, but the salt susceptibility of blood pressure (BP) is different in individual subjects. Although the pathogenesis of salt-sensitive hypertension is heterogeneous, it is mainly attributable to an impaired renal capacity to excrete sodium (Na(+) ). We recently identified two novel mechanisms that impair renal Na(+) -excreting function and result in an increase in BP. First, mineralocorticoid receptor (MR) activation in the kidney, which facilitates distal Na(+) reabsorption through epithelial Na(+) channel activation, causes salt-sensitive hypertension. This mechanism exists not only in models of high-aldosterone hypertension as seen in conditions of obesity or metabolic syndrome, but also in normal- or low-aldosterone type of salt-sensitive hypertension. In the latter, Rac1 activation by salt excess causes MR stimulation. Second, renospecific sympathoactivation may cause an increase in BP under conditions of salt excess. Renal beta2 adrenoceptor stimulation in the kidney leads to decreased transcription of the gene encoding WNK4, a negative regulator of Na(+) reabsorption through Na(+) -Cl (-) cotransporter in the distal convoluted tubules, resulting in salt-dependent hypertension. Abnormalities identified in these two pathways of Na(+) reabsorption in the distal nephron may present therapeutic targets for the treatment of salt-sensitive hypertension.

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  1. [11]11. Horita S, Zheng Y, Hara C, Yamada H, Kunimi M, Taniguchi S, 11. et al. Biphasic regulation of Na ϩ -HCO3 -cotransporter by angi- otensin II type 1A receptor. Hypertension. 2002;40:707 -12.
  2. [48]48. Ono A, Kuwaki T, Cao WH, Kumada M, Fujita T. High cal- 45. cium diet prevents barorefl ex impairment in salt-loaded spon- taneously hypertensive rats. Hypertension. 1994;24:83 -90.

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Authors
Ando, K., & Fujita, T.
Affiliations
The University of Tokyo (JP)
Corresponding author
Fujita, Toshiro
Venue
Annals of Medicine
Published
2012-06
Volume
44
Issue
sup1
Pages
S119-S126
ISSN
  • 0785-3890 (ISSN-L)
  • 1365-2060
OpenAlex
W1983090164
Cited by
61
References
61
Citations by year
2026: 1 · 2025: 2 · 2024: 11 · 2023: 3 · 2022: 5 · 2021: 2 · 2020: 5 · 2019: 3 · 2018: 5 · 2017: 4 · 2016: 4 · 2015: 4 · 2014: 2 · 2013: 8 · 2012: 1
FWCI
0.66
Type
journal article
Language
en
Open access
Locations
  • Annals of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (22590908, 24659410, 21229012)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal Regulation and Hypertension
  • Health Sciences › Nursing › Nutrition and Dietetics › Sodium Intake and Health
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Renin-Angiotensin System Studies
Keywords
salt-sensitive hypertension, salt intake, renal sodium excretion, mineralocorticoid receptor, epithelial sodium channel, aldosterone, Rac1, beta2-adrenergic receptor, WNK4, NaCl cotransporter, distal convoluted tubule, blood pressure regulation, metabolic syndrome, obesity
MeSH terms
Aldosterone, Blood Pressure, Humans, Hypertension, Kidney, Sodium, Signal Transduction, Protein Serine-Threonine Kinases, Sodium Chloride, Dietary, Receptors, Mineralocorticoid, rac1 GTP-Binding Protein

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