What question did this study set out to answer?

To evaluate subcellular membrane properties, enzymatic activities, and calcium handling in vascular and non-vascular smooth muscles of salt-sensitive and salt-resistant Dahl rats on different dietary salt regimens.

February 1, 1986Journal of Hypertension

Subcellular Membrane Properties in Vascular and Non-Vascular Smooth Muscles of Dahl Hypertensive Rats

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Why the study?

Does a high-salt diet alter subcellular membrane properties in vascular and non-vascular smooth muscles of salt-sensitive Dahl rats?

Key Points

To evaluate subcellular membrane properties, enzymatic activities, and calcium handling in vascular and non-vascular smooth muscles of salt-sensitive and salt-resistant Dahl rats on different dietary salt regimens.
Assigned salt-resistant and salt-sensitive Dahl rats to either a low-salt (0.4% NaCl) or high-salt (8.0% NaCl) diet for 5 weeks across four experimental groups.
Isolated subcellular membrane fractions from mesenteric arteries (vascular) and vas deferens (non-vascular) to measure protein content, membrane-associated enzyme activity, Ca2+ binding, and ATP-dependent Ca2+ transport.
Only salt-sensitive Dahl rats maintained on the 8.0% NaCl high-salt diet developed sustained high blood pressure after 5 weeks.
Mesenteric arterial membranes from hypertensive salt-sensitive rats demonstrated minor enhancements in Mg2+- and Ca2+-ATPase activities compared to all other groups.
Vas deferens membrane fractions from salt-sensitive rats on the high-salt diet exhibited decreased ATP-dependent Ca2+ transport compared to low-salt controls, whereas salt-resistant rats showed no membrane differences between diets.

Structured PICO

Does a high-salt diet alter subcellular membrane properties in vascular and non-vascular smooth muscles of salt-sensitive Dahl rats?

Population

Salt-resistant and salt-sensitive Dahl rats

Intervention

High-salt diet (8.0% NaCl) for 5 weeks

Comparator

Low-salt diet (0.4% NaCl)

Outcome

Subcellular membrane properties including protein contents, membrane associated enzyme activities, calcium ion (Ca2+) binding, and ATP-dependent Ca2+ transport in mesenteric arteries and vas deferenssurrogate

A high-salt diet induces specific alterations in calcium transport and ATPase activities in the smooth muscle membranes of salt-sensitive Dahl rats, which may relate to the development of hypertension.

Discussion

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Implication

Hypothesis-generating for Ca2+ handling in salt-sensitive hypertension; does not support clinical translation.

Cite This Study

Kwan et al. (1986) studied this question.

synapsesocial.com/papers/6a81de956494b7aed7bf76e5 https://doi.org/10.1097/00004872-198602000-00008

Topics

Hypertension management

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Subcellular Membrane Properties in Vascular and Non-Vascular Smooth Muscles of Dahl Hypertensive Rats

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Topics

Subcellular Membrane Properties in Vascular and Non-Vascular Smooth Muscles of Dahl Hypertensive Rats

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Topics

Also Consider