Inhibition of cardiac voltage-gated sodium channels by grape polyphenols

C. H R Wallace, I. Baczkó, L. Jones, M. Fercho, P. E. Light

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Background and purpose:The cardiovascular benefits of red wine consumption are often attributed to the antioxidant effects of its polyphenolic constituents, including quercetin, catechin and resveratrol. Inhibition of cardiac voltage-gated sodium channels (VGSCs) is antiarrhythmic and cardioprotective. As polyphenols may also modulate ion channels, and possess structural similarities to several antiarrhythmic VGSC inhibitors, we hypothesised that VGSC inhibition may contribute to cardioprotection by these polyphenols. Experimental approach: The whole-cell voltage-clamp technique was used to record peak and late VGSC currents (I Na) from recombinant human heart Na V1.5 channels expressed in tsA201 cells. Right ventricular myocytes from rat heart were isolated and single myocytes were field-stimulated. Either calcium transients or contractility were measured using the calcium-sensitive dye Calcium-Green 1AM or video edge detection, respectively. Key results: The red grape polyphenols quercetin, catechin and resveratrol blocked peak I Na with IC 50s of 19.4 μM, 76.8 μM and 77.3 μM, respectively. In contrast to lidocaine, resveratrol did not exhibit any frequency-dependence of peak I Na block. Late I Na induced by the VGSC long QT mutant R1623Q was reduced by resveratrol and quercetin. Resveratrol and quercetin also blocked late I Na induced by the toxin, ATX II, with IC 50s of 26.1 μM and 24.9 μM, respectively. In field-stimulated myocytes, ATXII-induced increases in diastolic calcium were prevented and reversed by resveratrol. ATXII-induced contractile dysfunction was delayed and reduced by resveratrol. Conclusions and implications: Our results indicate that several red grape polyphenols inhibit cardiac VGSCs and that this effect may contribute to the documented cardioprotective efficacy of red grape products.

Original languageEnglish
Pages (from-to)657-665
Number of pages9
JournalBritish Journal of Pharmacology
Volume149
Issue number6
DOIs
Publication statusPublished - Nov 3 2006

Fingerprint

Voltage-Gated Sodium Channels
Vitis
Polyphenols
Quercetin
Muscle Cells
Catechin
Calcium
Voltage-Gated Sodium Channel Blockers
Patch-Clamp Techniques
Wine
Lidocaine
resveratrol
Ion Channels
Coloring Agents
Antioxidants

Keywords

  • Calcium homeostasis
  • Calcium overload
  • Cardioprotection
  • Catechin
  • Ischaemia-reperfusion injury
  • Polyphenols
  • Quercetin
  • Resveratrol
  • Sodium homeostasis
  • Voltage-gated sodium channels

ASJC Scopus subject areas

  • Pharmacology

Cite this

Inhibition of cardiac voltage-gated sodium channels by grape polyphenols. / Wallace, C. H R; Baczkó, I.; Jones, L.; Fercho, M.; Light, P. E.

In: British Journal of Pharmacology, Vol. 149, No. 6, 03.11.2006, p. 657-665.

Research output: Contribution to journalArticle

Wallace, C. H R ; Baczkó, I. ; Jones, L. ; Fercho, M. ; Light, P. E. / Inhibition of cardiac voltage-gated sodium channels by grape polyphenols. In: British Journal of Pharmacology. 2006 ; Vol. 149, No. 6. pp. 657-665.
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AU - Wallace, C. H R

AU - Baczkó, I.

AU - Jones, L.

AU - Fercho, M.

AU - Light, P. E.

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N2 - Background and purpose:The cardiovascular benefits of red wine consumption are often attributed to the antioxidant effects of its polyphenolic constituents, including quercetin, catechin and resveratrol. Inhibition of cardiac voltage-gated sodium channels (VGSCs) is antiarrhythmic and cardioprotective. As polyphenols may also modulate ion channels, and possess structural similarities to several antiarrhythmic VGSC inhibitors, we hypothesised that VGSC inhibition may contribute to cardioprotection by these polyphenols. Experimental approach: The whole-cell voltage-clamp technique was used to record peak and late VGSC currents (I Na) from recombinant human heart Na V1.5 channels expressed in tsA201 cells. Right ventricular myocytes from rat heart were isolated and single myocytes were field-stimulated. Either calcium transients or contractility were measured using the calcium-sensitive dye Calcium-Green 1AM or video edge detection, respectively. Key results: The red grape polyphenols quercetin, catechin and resveratrol blocked peak I Na with IC 50s of 19.4 μM, 76.8 μM and 77.3 μM, respectively. In contrast to lidocaine, resveratrol did not exhibit any frequency-dependence of peak I Na block. Late I Na induced by the VGSC long QT mutant R1623Q was reduced by resveratrol and quercetin. Resveratrol and quercetin also blocked late I Na induced by the toxin, ATX II, with IC 50s of 26.1 μM and 24.9 μM, respectively. In field-stimulated myocytes, ATXII-induced increases in diastolic calcium were prevented and reversed by resveratrol. ATXII-induced contractile dysfunction was delayed and reduced by resveratrol. Conclusions and implications: Our results indicate that several red grape polyphenols inhibit cardiac VGSCs and that this effect may contribute to the documented cardioprotective efficacy of red grape products.

AB - Background and purpose:The cardiovascular benefits of red wine consumption are often attributed to the antioxidant effects of its polyphenolic constituents, including quercetin, catechin and resveratrol. Inhibition of cardiac voltage-gated sodium channels (VGSCs) is antiarrhythmic and cardioprotective. As polyphenols may also modulate ion channels, and possess structural similarities to several antiarrhythmic VGSC inhibitors, we hypothesised that VGSC inhibition may contribute to cardioprotection by these polyphenols. Experimental approach: The whole-cell voltage-clamp technique was used to record peak and late VGSC currents (I Na) from recombinant human heart Na V1.5 channels expressed in tsA201 cells. Right ventricular myocytes from rat heart were isolated and single myocytes were field-stimulated. Either calcium transients or contractility were measured using the calcium-sensitive dye Calcium-Green 1AM or video edge detection, respectively. Key results: The red grape polyphenols quercetin, catechin and resveratrol blocked peak I Na with IC 50s of 19.4 μM, 76.8 μM and 77.3 μM, respectively. In contrast to lidocaine, resveratrol did not exhibit any frequency-dependence of peak I Na block. Late I Na induced by the VGSC long QT mutant R1623Q was reduced by resveratrol and quercetin. Resveratrol and quercetin also blocked late I Na induced by the toxin, ATX II, with IC 50s of 26.1 μM and 24.9 μM, respectively. In field-stimulated myocytes, ATXII-induced increases in diastolic calcium were prevented and reversed by resveratrol. ATXII-induced contractile dysfunction was delayed and reduced by resveratrol. Conclusions and implications: Our results indicate that several red grape polyphenols inhibit cardiac VGSCs and that this effect may contribute to the documented cardioprotective efficacy of red grape products.

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KW - Ischaemia-reperfusion injury

KW - Polyphenols

KW - Quercetin

KW - Resveratrol

KW - Sodium homeostasis

KW - Voltage-gated sodium channels

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