Antihypertensive treatment normalizes decreased endothelium-dependent relaxations in rats with salt-induced hypertension.
Why the study?
Does antihypertensive treatment improve endothelium-dependent relaxations in rats with salt-induced hypertension?
Population
Dahl salt-sensitive (DS) and Dahl salt-resistant rats (DR) on a high (8% NaCl) or low (0.1% NaCl) sodium diet
Comparison
Combination of reserpine, hydrochlorothiazide… vs 8% NaCl diet or 0.1% NaCl diet without…
Design
Preclinical
Follow-up
8 weeks
Authors
Discussion
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Implication
Antihypertensive treatment may restore endothelial function in salt-sensitive hypertension models; leaves open translation to human outcomes.
Key Points
- This research investigates the impact of antihypertensive treatment on endothelium-dependent relaxations in salt-sensitive and salt-resistant rats under varying sodium diets.
- Dahl salt-sensitive and salt-resistant rats were placed on high (8% NaCl) or low (0.1% NaCl) sodium diets for 8 weeks.
- Antihypertensive agents including reserpine, hydrochlorothiazide, and hydralazine were administered for 8 or 2 weeks in specific groups.
- Endothelium-dependent relaxations were measured in aortic rings using isometric tension recordings after exposure to various agonists.
- Endothelium-dependent relaxations were significantly lower in Dahl salt-sensitive rats on the high sodium diet compared to the other groups.
- Antihypertensive treatment for both 8 and 2 weeks effectively prevented or reversed reduced endothelial relaxations in salt-sensitive rats.
- Relaxations in response to endothelium-independent agonist sodium nitroprusside did not change with treatment.
Structured PICO
Does antihypertensive treatment improve endothelium-dependent relaxations in rats with salt-induced hypertension?
P
Population
Dahl salt-sensitive (DS) and Dahl salt-resistant rats (DR) on a high (8% NaCl) or low (0.1% NaCl) sodium diet
I
Intervention
Combination of reserpine, hydrochlorothiazide, and hydralazine added to 8% NaCl diet for 8 or 2 weeks
C
Comparator
8% NaCl diet or 0.1% NaCl diet without antihypertensive treatment
O
Outcome
Endothelium-dependent relaxations in aortic rings (measured by isometric tension recording in response to acetylcholine, adenosine 5'-diphosphate, and thrombin)surrogate
Antihypertensive treatment normalizes impaired endothelium-dependent relaxations in a rat model of salt-induced hypertension, suggesting a mechanism for preventing cardiovascular complications.
Cite This Study
Lüscher et al. (1987) studied this question.