author_facet Lin, Zhenhao
Xing, Wenlu
Gao, Chuanyu
Wang, Xianpei
Qi, Datun
Dai, Guoyou
Zhao, Wen
Yan, Ganxin
Lin, Zhenhao
Xing, Wenlu
Gao, Chuanyu
Wang, Xianpei
Qi, Datun
Dai, Guoyou
Zhao, Wen
Yan, Ganxin
author Lin, Zhenhao
Xing, Wenlu
Gao, Chuanyu
Wang, Xianpei
Qi, Datun
Dai, Guoyou
Zhao, Wen
Yan, Ganxin
spellingShingle Lin, Zhenhao
Xing, Wenlu
Gao, Chuanyu
Wang, Xianpei
Qi, Datun
Dai, Guoyou
Zhao, Wen
Yan, Ganxin
Journal of the American Heart Association
Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
Cardiology and Cardiovascular Medicine
author_sort lin, zhenhao
spelling Lin, Zhenhao Xing, Wenlu Gao, Chuanyu Wang, Xianpei Qi, Datun Dai, Guoyou Zhao, Wen Yan, Ganxin 2047-9980 Ovid Technologies (Wolters Kluwer Health) Cardiology and Cardiovascular Medicine http://dx.doi.org/10.1161/jaha.117.007730 <jats:sec xml:lang="en"> <jats:title>Background</jats:title> <jats:p xml:lang="en"> Vascular endothelial growth factor ( <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ) exerts a number of beneficial effects on ischemic myocardium via its angiogenic properties. However, little is known about whether <jats:styled-content style="fixed-case">VEGF</jats:styled-content> has a direct effect on the electrical properties of cardiomyocytes. In the present study, we investigated the effects of different concentrations of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> on delayed rectifier potassium currents ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> ) in guinea pig ventricular myocytes and their effects on action potential ( <jats:styled-content style="fixed-case">AP</jats:styled-content> ) parameters. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Methods and Results</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> and <jats:styled-content style="fixed-case">AP</jats:styled-content> were recorded by the whole‐cell patch clamp method in ventricular myocytes. Cells were superfused with control solution or solution containing <jats:styled-content style="fixed-case">VEGF</jats:styled-content> at different concentrations for 10 minutes before recording. Some ventricular myocytes were pretreated with a phosphatidylinositol 3‐kinase inhibitor for 1 hour before the addition of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> . We found that <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited the slowly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> ) in a concentration‐dependent manner (18.13±1.04 versus 12.73±0.34, n=5, <jats:italic>P</jats:italic> =0.001; 12.73±0.34 versus 9.05±1.20, n=5, <jats:italic>P</jats:italic> =0.036) and prolonged <jats:styled-content style="fixed-case">AP</jats:styled-content> duration (894.5±36.92 versus 746.3±33.71, n=5, <jats:italic>P</jats:italic> =0.021). Wortmannin, a phosphatidylinositol 3‐kinase inhibitor, eliminated these <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ‐induced effects. <jats:styled-content style="fixed-case">VEGF</jats:styled-content> had no significant effect on the rapidly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>r</jats:sub> ), resting membrane potential, <jats:styled-content style="fixed-case">AP</jats:styled-content> amplitude, or maximal velocity of depolarization. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Conclusions</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> in a concentration‐dependent manner through a phosphatidylinositol 3‐kinase–mediated signaling pathway, leading to <jats:styled-content style="fixed-case">AP</jats:styled-content> prolongation. The results indicate a promising therapeutic potential of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> in prevention of ventricular tachyarrhythmias under conditions of high sympathetic activity and ischemia. </jats:p> </jats:sec> Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes Journal of the American Heart Association
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recordtype ai
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series Journal of the American Heart Association
source_id 49
title Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_unstemmed Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_full Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_fullStr Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_full_unstemmed Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_short Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_sort inhibitory effect of vascular endothelial growth factor on the slowly activating delayed rectifier potassium current in guinea pig ventricular myocytes
topic Cardiology and Cardiovascular Medicine
url http://dx.doi.org/10.1161/jaha.117.007730
publishDate 2018
physical
description <jats:sec xml:lang="en"> <jats:title>Background</jats:title> <jats:p xml:lang="en"> Vascular endothelial growth factor ( <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ) exerts a number of beneficial effects on ischemic myocardium via its angiogenic properties. However, little is known about whether <jats:styled-content style="fixed-case">VEGF</jats:styled-content> has a direct effect on the electrical properties of cardiomyocytes. In the present study, we investigated the effects of different concentrations of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> on delayed rectifier potassium currents ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> ) in guinea pig ventricular myocytes and their effects on action potential ( <jats:styled-content style="fixed-case">AP</jats:styled-content> ) parameters. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Methods and Results</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> and <jats:styled-content style="fixed-case">AP</jats:styled-content> were recorded by the whole‐cell patch clamp method in ventricular myocytes. Cells were superfused with control solution or solution containing <jats:styled-content style="fixed-case">VEGF</jats:styled-content> at different concentrations for 10 minutes before recording. Some ventricular myocytes were pretreated with a phosphatidylinositol 3‐kinase inhibitor for 1 hour before the addition of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> . We found that <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited the slowly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> ) in a concentration‐dependent manner (18.13±1.04 versus 12.73±0.34, n=5, <jats:italic>P</jats:italic> =0.001; 12.73±0.34 versus 9.05±1.20, n=5, <jats:italic>P</jats:italic> =0.036) and prolonged <jats:styled-content style="fixed-case">AP</jats:styled-content> duration (894.5±36.92 versus 746.3±33.71, n=5, <jats:italic>P</jats:italic> =0.021). Wortmannin, a phosphatidylinositol 3‐kinase inhibitor, eliminated these <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ‐induced effects. <jats:styled-content style="fixed-case">VEGF</jats:styled-content> had no significant effect on the rapidly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>r</jats:sub> ), resting membrane potential, <jats:styled-content style="fixed-case">AP</jats:styled-content> amplitude, or maximal velocity of depolarization. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Conclusions</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> in a concentration‐dependent manner through a phosphatidylinositol 3‐kinase–mediated signaling pathway, leading to <jats:styled-content style="fixed-case">AP</jats:styled-content> prolongation. The results indicate a promising therapeutic potential of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> in prevention of ventricular tachyarrhythmias under conditions of high sympathetic activity and ischemia. </jats:p> </jats:sec>
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author Lin, Zhenhao, Xing, Wenlu, Gao, Chuanyu, Wang, Xianpei, Qi, Datun, Dai, Guoyou, Zhao, Wen, Yan, Ganxin
author_facet Lin, Zhenhao, Xing, Wenlu, Gao, Chuanyu, Wang, Xianpei, Qi, Datun, Dai, Guoyou, Zhao, Wen, Yan, Ganxin, Lin, Zhenhao, Xing, Wenlu, Gao, Chuanyu, Wang, Xianpei, Qi, Datun, Dai, Guoyou, Zhao, Wen, Yan, Ganxin
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description <jats:sec xml:lang="en"> <jats:title>Background</jats:title> <jats:p xml:lang="en"> Vascular endothelial growth factor ( <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ) exerts a number of beneficial effects on ischemic myocardium via its angiogenic properties. However, little is known about whether <jats:styled-content style="fixed-case">VEGF</jats:styled-content> has a direct effect on the electrical properties of cardiomyocytes. In the present study, we investigated the effects of different concentrations of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> on delayed rectifier potassium currents ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> ) in guinea pig ventricular myocytes and their effects on action potential ( <jats:styled-content style="fixed-case">AP</jats:styled-content> ) parameters. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Methods and Results</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> and <jats:styled-content style="fixed-case">AP</jats:styled-content> were recorded by the whole‐cell patch clamp method in ventricular myocytes. Cells were superfused with control solution or solution containing <jats:styled-content style="fixed-case">VEGF</jats:styled-content> at different concentrations for 10 minutes before recording. Some ventricular myocytes were pretreated with a phosphatidylinositol 3‐kinase inhibitor for 1 hour before the addition of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> . We found that <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited the slowly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> ) in a concentration‐dependent manner (18.13±1.04 versus 12.73±0.34, n=5, <jats:italic>P</jats:italic> =0.001; 12.73±0.34 versus 9.05±1.20, n=5, <jats:italic>P</jats:italic> =0.036) and prolonged <jats:styled-content style="fixed-case">AP</jats:styled-content> duration (894.5±36.92 versus 746.3±33.71, n=5, <jats:italic>P</jats:italic> =0.021). Wortmannin, a phosphatidylinositol 3‐kinase inhibitor, eliminated these <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ‐induced effects. <jats:styled-content style="fixed-case">VEGF</jats:styled-content> had no significant effect on the rapidly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>r</jats:sub> ), resting membrane potential, <jats:styled-content style="fixed-case">AP</jats:styled-content> amplitude, or maximal velocity of depolarization. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Conclusions</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> in a concentration‐dependent manner through a phosphatidylinositol 3‐kinase–mediated signaling pathway, leading to <jats:styled-content style="fixed-case">AP</jats:styled-content> prolongation. The results indicate a promising therapeutic potential of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> in prevention of ventricular tachyarrhythmias under conditions of high sympathetic activity and ischemia. </jats:p> </jats:sec>
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imprint Ovid Technologies (Wolters Kluwer Health), 2018
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spelling Lin, Zhenhao Xing, Wenlu Gao, Chuanyu Wang, Xianpei Qi, Datun Dai, Guoyou Zhao, Wen Yan, Ganxin 2047-9980 Ovid Technologies (Wolters Kluwer Health) Cardiology and Cardiovascular Medicine http://dx.doi.org/10.1161/jaha.117.007730 <jats:sec xml:lang="en"> <jats:title>Background</jats:title> <jats:p xml:lang="en"> Vascular endothelial growth factor ( <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ) exerts a number of beneficial effects on ischemic myocardium via its angiogenic properties. However, little is known about whether <jats:styled-content style="fixed-case">VEGF</jats:styled-content> has a direct effect on the electrical properties of cardiomyocytes. In the present study, we investigated the effects of different concentrations of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> on delayed rectifier potassium currents ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> ) in guinea pig ventricular myocytes and their effects on action potential ( <jats:styled-content style="fixed-case">AP</jats:styled-content> ) parameters. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Methods and Results</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> and <jats:styled-content style="fixed-case">AP</jats:styled-content> were recorded by the whole‐cell patch clamp method in ventricular myocytes. Cells were superfused with control solution or solution containing <jats:styled-content style="fixed-case">VEGF</jats:styled-content> at different concentrations for 10 minutes before recording. Some ventricular myocytes were pretreated with a phosphatidylinositol 3‐kinase inhibitor for 1 hour before the addition of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> . We found that <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited the slowly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> ) in a concentration‐dependent manner (18.13±1.04 versus 12.73±0.34, n=5, <jats:italic>P</jats:italic> =0.001; 12.73±0.34 versus 9.05±1.20, n=5, <jats:italic>P</jats:italic> =0.036) and prolonged <jats:styled-content style="fixed-case">AP</jats:styled-content> duration (894.5±36.92 versus 746.3±33.71, n=5, <jats:italic>P</jats:italic> =0.021). Wortmannin, a phosphatidylinositol 3‐kinase inhibitor, eliminated these <jats:styled-content style="fixed-case">VEGF</jats:styled-content> ‐induced effects. <jats:styled-content style="fixed-case">VEGF</jats:styled-content> had no significant effect on the rapidly activating delayed rectifier potassium current ( <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>r</jats:sub> ), resting membrane potential, <jats:styled-content style="fixed-case">AP</jats:styled-content> amplitude, or maximal velocity of depolarization. </jats:p> </jats:sec> <jats:sec xml:lang="en"> <jats:title>Conclusions</jats:title> <jats:p xml:lang="en"> <jats:styled-content style="fixed-case">VEGF</jats:styled-content> inhibited <jats:styled-content style="fixed-case"> I <jats:sub>K</jats:sub> </jats:styled-content> <jats:sub>s</jats:sub> in a concentration‐dependent manner through a phosphatidylinositol 3‐kinase–mediated signaling pathway, leading to <jats:styled-content style="fixed-case">AP</jats:styled-content> prolongation. The results indicate a promising therapeutic potential of <jats:styled-content style="fixed-case">VEGF</jats:styled-content> in prevention of ventricular tachyarrhythmias under conditions of high sympathetic activity and ischemia. </jats:p> </jats:sec> Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes Journal of the American Heart Association
spellingShingle Lin, Zhenhao, Xing, Wenlu, Gao, Chuanyu, Wang, Xianpei, Qi, Datun, Dai, Guoyou, Zhao, Wen, Yan, Ganxin, Journal of the American Heart Association, Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes, Cardiology and Cardiovascular Medicine
title Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_full Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_fullStr Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_full_unstemmed Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_short Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
title_sort inhibitory effect of vascular endothelial growth factor on the slowly activating delayed rectifier potassium current in guinea pig ventricular myocytes
title_unstemmed Inhibitory Effect of Vascular Endothelial Growth Factor on the Slowly Activating Delayed Rectifier Potassium Current in Guinea Pig Ventricular Myocytes
topic Cardiology and Cardiovascular Medicine
url http://dx.doi.org/10.1161/jaha.117.007730