What question did this study set out to answer?

To determine the electrophysiological and transcriptional mechanisms by which the potassium channel KCa3.1 controls vascular smooth muscle cell proliferation.

April 23, 2013Journal of Biological ChemistryOpen Access

The Intermediate Conductance Calcium-activated Potassium Channel KCa3.1 Regulates Vascular Smooth Muscle Cell Proliferation via Controlling Calcium-dependent Signaling

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Population

Human coronary artery vascular smooth muscle cells (VSMCs)

Design

Preclinical

Authors

DBDan BiUniversity of Nevada, Reno KTKazuyoshi ToyamaUniversity of Nevada, Reno VLVincent LemaîtreUCLouvain

Discussion

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Implication

KCa3.1 blockade may limit VSMC proliferation in vitro; leaves open therapeutic targeting in atherosclerosis pending in vivo studies.

Key Points

To determine the electrophysiological and transcriptional mechanisms by which the potassium channel KCa3.1 controls vascular smooth muscle cell proliferation.
Assessed PDGF-BB-induced proliferation in human coronary artery vascular smooth muscle cells under modulated intracellular calcium levels.
Evaluated the impact of KCa3.1 blockade, genetic knockdown, overexpression, and pharmacological stimulation on cell phenotype, transcription factor expression, and calcium influx.
KCa3.1 blockade or knockdown inhibited cell proliferation by reducing intracellular calcium levels and decreasing expression of phosphorylated CREB, c-Fos, and NOR-1.
KCa3.1 overexpression enhanced proliferation, while pharmacological stimulation unexpectedly suppressed proliferation, downregulated KCa3.1 and PDGF β-receptors, and promoted a differentiated spindle-shaped phenotype.

Structured PICO

Population

Human coronary artery vascular smooth muscle cells (VSMCs)

Intervention

KCa3.1 blockade, knockdown, overexpression, and pharmacological stimulation

Outcome

VSMC proliferation and intracellular calcium concentration ([Ca2+]i)surrogate

KCa3.1 regulates vascular smooth muscle cell proliferation via calcium-dependent signaling, highlighting its potential as a therapeutic target for atherosclerosis.

Cite This Study

Bi et al. (2013) studied this question.

synapsesocial.com/papers/6a83b60dd4bda846d66a8d57 https://doi.org/10.1074/jbc.m112.427187

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The Intermediate Conductance Calcium-activated Potassium Channel KCa3.1 Regulates Vascular Smooth Muscle Cell Proliferation via Controlling Calcium-dependent Signaling

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

The Intermediate Conductance Calcium-activated Potassium Channel KCa3.1 Regulates Vascular Smooth Muscle Cell Proliferation via Controlling Calcium-dependent Signaling

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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