Calciotropic hormones in salt-sensitive essential hypertension : 1,25-dihydroxyvitamin D and parathyroid hypertensive factor

HYPOTHESIS: Some, but not all, men and women display a pressor response to increases in dietary salt intake. The mechanism(s) underlying this salt-sensitive hypertension remains poorly defined. We have developed a hypothesis that all hypertension arises from an imbalance between mechanisms of cytosolic calcium accumulation from the extracellular space versus calcium release into the cytoplasm from intracellular storage sites. Extracellular calcium-dependent hypertension predominates in salt-sensitive subjects, while excess angiotensin II mediates the excess intracellular calcium release that is characteristic of renin-dependent salt-insensitive forms of hypertension. Studies on pressor hormones: We investigated potential etiologic factors mediating the cellular calcium accumulation in salt-sensitive hypertensive human subjects, and focused on two calcium-related circulating hormonal substances, 1,25-dihydroxyvitamin D and the recently described parathyroid hypertensive factor. Both of these substances directly facilitate calcium transport from the extracellular space in the cell. Furthermore, levels of these hormones are greatest in black normotensive and low-renin essential hypertensive subjects, both groups associated with salt-related hypertensive disease. Lastly, dietary salt loading elevates 1,25-dihydroxyvitamin D and parathyroid hypertensive factor levels, and the greater the level of either hormone, the greater the pressor response to salt.

CONCLUSIONS: It is reasonable to consider that these salt-induced cellular ionophoric actions of 1,25-dihydroxyvitamin D and parathyroid hypertensive factor contribute, at least in part, to the mechanism of salt-sensitive hypertension in man.

Medienart:

Artikel

Erscheinungsjahr:

1994

Erschienen:

1994

Enthalten in:

Zur Gesamtaufnahme - volume:12

Enthalten in:

Journal of hypertension. Supplement : official journal of the International Society of Hypertension - 12(1994), 1 vom: 01. Jan., Seite S3-9

Sprache:

Englisch

Beteiligte Personen:

Resnick, L M [VerfasserIn]

Themen:

451W47IQ8X
Biological Factors
Calcitriol
Calcium
FXC9231JVH
Journal Article
Parathyroid hypertensive factor
Review
SY7Q814VUP
Sodium Chloride

Anmerkungen:

Date Completed 11.07.1994

Date Revised 19.11.2015

published: Print

Citation Status MEDLINE

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM081825463