Why the study?
To investigate whether the renal beta-adrenergic-WNK4-NCC pathway hypothesis is valid for salt hypertension in Dahl rats characterized by high sympathetic tone and abnormal renal sodium handling.
Does propranolol reduce blood pressure and alter sodium excretion in salt-sensitive and salt-resistant Dahl rats on high- or low-salt diets?
Population
Male 8-week-old salt-sensitive (SS/Jr) and salt-resistant (SR/Jr) Dahl rats
Comparison
Low-salt vs high-salt diet with or without chronic propranolol treatment
Design
Preclinical animal study
Follow-up
6 weeks
Authors
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Findings in Dahl rats do not support the proposed pathway; leaves open its role in other salt-sensitive models.
Does propranolol reduce blood pressure and alter sodium excretion in salt-sensitive and salt-resistant Dahl rats on high- or low-salt diets?
The study suggests that the renal ß-adrenergic-WNK4-NCC pathway is not essential for the pathogenesis or maintenance of salt hypertension in Dahl rats.
Zicha et al. (2019) studied this question.
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