Related Experiment Video

Updated: Feb 24, 2026

Voltage-Dependent Potassium Current Recording on H9c2 Cardiomyocytes via the Whole-Cell Patch-Clamp Technique
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Voltage-Dependent Potassium Current Recording on H9c2 Cardiomyocytes via the Whole-Cell Patch-Clamp Technique

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Effects of equol on multiple K+ channels stably expressed in HEK 293 cells

Xiu-Ling Deng1, Yan Wang2, Guo-Sheng Xiao2

  • 1Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China.

Plos One
|August 24, 2017
PubMed

Insights

Equol affects cardiovascular potassium (K+) channels, inhibiting some while increasing others at specific concentrations. This suggests equol

Area of Science:

  • Cardiovascular pharmacology
  • Molecular biology
  • Electrophysiology

Background:

  • Potassium channels play critical roles in cardiovascular function.
  • Equol's effects on cardiac ion channels are not fully understood.
  • Investigating equol's impact on cardiovascular K+ channels is crucial for understanding its therapeutic potential.

Purpose of the Study:

  • To investigate the effects of equol on various cardiovascular potassium (K+) channel currents.
  • To determine the concentration-dependent effects of equol on specific K+ channel subtypes.
  • To evaluate equol's potential as a therapeutic agent for cardiovascular disorders.

Main Methods:

  • HEK 293 cells stably expressing cloned cardiovascular K+ channels were used.
  • The conventional whole-cell patch voltage-clamp technique was employed.
  • Concentration-response relationships were established for equol's effects.

Main Results:

  • Equol inhibited hKv1.5, hKv4.3, IKs, and IhERG currents in a concentration-dependent manner.
  • Equol increased large-conductance calcium-activated potassium (BKCa) channel current at very low concentrations (EC50: 0.1 μM).
  • Equol did not significantly affect guinea pig ventricular action potentials at concentrations up to 3 μM.

Conclusions:

  • Equol exhibits differential effects on cardiac K+ channels, inhibiting some at higher concentrations and activating BKCa channels at lower concentrations.
  • These findings suggest equol may be a safe drug candidate for cerebral vascular disorders.
  • Further research is warranted to explore equol's therapeutic applications in cardiovascular conditions.

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