What is the clinical evidence from this study?

Study design: Other. Population: Rat arterial smooth muscle cell proliferation. Intervention: Angiotensin II and Aldosterone vs. Untreated controls. Primary outcome: Tritiated thymidine incorporation and cell number (p=<0.05).

What question did this study set out to answer?

This research investigates how aldosterone affects the proliferation of rat arterial smooth muscle cells (RASMC) in response to angiotensin II.

August 10, 2004Hypertension

Mechanism for Aldosterone Potentiation of Angiotensin II–Stimulated Rat Arterial Smooth Muscle Cell Proliferation

Q: What are the key findings of this study?

Aldosterone significantly enhanced Angiotensin II-induced rat arterial smooth muscle cell proliferation (P<0.05), potentially by modulating AT1 receptor expression.

Q: What question did this study set out to answer?

This research investigates how aldosterone affects the proliferation of rat arterial smooth muscle cells (RASMC) in response to angiotensin II.

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Key result

Aldosterone significantly enhanced Angiotensin II-induced rat arterial smooth muscle cell proliferation (P<0.05), potentially by modulating AT1 receptor expression.

Population

Rat arterial smooth muscle cells (RASMC) in vitro

Comparison

Angiotensin II (10 mol/L) alone or combined with… vs Untreated controls

Design

Preclinical

Authors

FXFang XiaoNanjing University of Finance and Economics JPJ.R. PuddefootQueen Mary University of London SBStewart BarkerAin Shams University

Discussion

Member takes

Implication

Cautions against clinical extrapolation from rat cells; leaves open mechanistic validation in human vascular disease.

Key Points

This research investigates how aldosterone affects the proliferation of rat arterial smooth muscle cells (RASMC) in response to angiotensin II.
In vitro proliferation studies using tritiated thymidine incorporation in RASMC, with varying concentrations of angiotensin II and aldosterone.
Gene transcription analysis of CYP11B1 and CYP11B2 by real-time RT-PCR in RASMC.
Assessment of AT1 receptor mRNA and protein levels through RT-PCR and immunoblotting after aldosterone treatment.
Ang II significantly increased RASMC proliferation (P<0.01) compared to controls, which was inhibited by trilostane (P<0.05).
Aldosterone enhanced Ang II-induced proliferation at lower concentrations (P<0.05).
Aldosterone treatment increased AT1 receptor mRNA and protein levels (P<0.05) in RASMC.

Structured PICO

Population

Rat arterial smooth muscle cells (RASMC) in vitro

Intervention

Angiotensin II (10(-7) mol/L) alone or combined with aldosterone (10(-10) mol/L and 10(-8) mol/L) or trilostane

Comparator

Untreated controls

Outcome

Cell proliferation (assessed by tritiated thymidine incorporation and cell number) and AT1 receptor expression (mRNA and protein)surrogate

Main Result

p-value: p=<0.05

Aldosterone potentiates Angiotensin II-stimulated proliferation of rat arterial smooth muscle cells, likely by upregulating the expression of the AT1 receptor.

Cite This Study

Xiao et al. (2004) studied Rat arterial smooth muscle cell proliferation. Angiotensin II and Aldosterone vs. Untreated controls was evaluated on Tritiated thymidine incorporation and cell number (p=<0.05). Aldosterone significantly enhanced Angiotensin II-induced rat arterial smooth muscle cell proliferation (P<0.05), potentially by modulating AT1 receptor expression.

synapsesocial.com/papers/6a2030aa60a84f4b7dd8d901 https://doi.org/10.1161/01.hyp.0000140771.21243.ed

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Mechanism for Aldosterone Potentiation of Angiotensin II–Stimulated Rat Arterial Smooth Muscle Cell Proliferation

Discussion

Member takes

Implication

Key Points

Structured PICO

Main Result

Cite This Study

Mechanism for Aldosterone Potentiation of Angiotensin II–Stimulated Rat Arterial Smooth Muscle Cell Proliferation

Discussion

Member takes

Implication

Key Points

Structured PICO

Main Result

Cite This Study

Also Consider

Also Consider