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De Waard S, Montnach J, Ribeiro B, Nicolas S, Forest V, Charpentier F, Mangoni ME, Gaborit N, Ronjat M, Loussouarn G, Lemarchand P, De Waard M. Functional Impact of BeKm-1, a High-Affinity hERG Blocker, on Cardiomyocytes Derived from Human-Induced Pluripotent Stem Cells. Int J Mol Sci 2020; 21:ijms21197167. [PMID: 32998413 PMCID: PMC7582727 DOI: 10.3390/ijms21197167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/21/2020] [Accepted: 09/24/2020] [Indexed: 12/22/2022] Open
Abstract
IKr current, a major component of cardiac repolarization, is mediated by human Ether-à-go-go-Related Gene (hERG, Kv11.1) potassium channels. The blockage of these channels by pharmacological compounds is associated to drug-induced long QT syndrome (LQTS), which is a life-threatening disorder characterized by ventricular arrhythmias and defects in cardiac repolarization that can be illustrated using cardiomyocytes derived from human-induced pluripotent stem cells (hiPS-CMs). This study was meant to assess the modification in hiPS-CMs excitability and contractile properties by BeKm-1, a natural scorpion venom peptide that selectively interacts with the extracellular face of hERG, by opposition to reference compounds that act onto the intracellular face. Using an automated patch-clamp system, we compared the affinity of BeKm-1 for hERG channels with some reference compounds. We fully assessed its effects on the electrophysiological, calcium handling, and beating properties of hiPS-CMs. By delaying cardiomyocyte repolarization, the peptide induces early afterdepolarizations and reduces spontaneous action potentials, calcium transients, and contraction frequencies, therefore recapitulating several of the critical phenotype features associated with arrhythmic risk in drug-induced LQTS. BeKm-1 exemplifies an interesting reference compound in the integrated hiPS-CMs cell model for all drugs that may block the hERG channel from the outer face. Being a peptide that is easily modifiable, it will serve as an ideal molecular platform for the design of new hERG modulators displaying additional functionalities.
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Affiliation(s)
- Stephan De Waard
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
- LabEx Ion Channels, Science & Therapeutics, F-06560 Valbonne, France;
| | - Jérôme Montnach
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Barbara Ribeiro
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Sébastien Nicolas
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Virginie Forest
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Flavien Charpentier
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Matteo Elia Mangoni
- LabEx Ion Channels, Science & Therapeutics, F-06560 Valbonne, France;
- Institut de Génomique Fonctionnelle, CNRS, INSERM, Université de Montpellier, F34094 Montpellier, France
| | - Nathalie Gaborit
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Michel Ronjat
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
- LabEx Ion Channels, Science & Therapeutics, F-06560 Valbonne, France;
| | - Gildas Loussouarn
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Patricia Lemarchand
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
| | - Michel De Waard
- L’institut du thorax, INSERM, CNRS, Université de Nantes, F-44007 Nantes, France; (S.D.W.); (J.M.); (B.R.); (S.N.); (V.F.); (F.C.); (N.G.); (M.R.); (G.L.); (P.L.)
- LabEx Ion Channels, Science & Therapeutics, F-06560 Valbonne, France;
- Smartox Biotechnology, 6 rue des Platanes, F-38120 Saint-Egrève, France
- Correspondence: ; Tel.: +33-228-080-076
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Wang L, Dou W, Malhi M, Zhu M, Liu H, Plakhotnik J, Xu Z, Zhao Q, Chen J, Chen S, Hamilton R, Simmons CA, Maynes JT, Sun Y. Microdevice Platform for Continuous Measurement of Contractility, Beating Rate, and Beating Rhythm of Human-Induced Pluripotent Stem Cell-Cardiomyocytes inside a Controlled Incubator Environment. ACS Appl Mater Interfaces 2018; 10:21173-21183. [PMID: 29874032 DOI: 10.1021/acsami.8b05407] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The heart completes a complex set of tasks, including the initiation or propagation of an electrical signal with regularity (proper heart rate and rhythm) and generating sufficient force of contraction (contractility). Probing mechanisms of heart diseases and quantifying drug efficacies demand a platform that is capable of continuous operation inside a cell incubator for long-term measurement of cardiomyocyte (CM) monolayers. Here, we report a microdevice array that is capable of performing continuous, long-term (14 days) measurement of contractility, beating rate, and beating rhythm in a monolayer of human-induced pluripotent stem cell-CMs (hiPSC-CMs). The device consists of a deformable membrane with embedded carbon nanotube (CNT)-based strain sensors. Contraction of the hiPSC-CMs seeded on the membrane induces electrical resistance change of the CNT strain sensor. Continuously reading the sensor signals revealed that hiPSC-CMs started to beat from day 2 and plateaued on day 5. Average contractile stress generated by a monolayer of hiPSC-CMs was determined to be 2.34 ± 0.041 kPa with a beating rate of 1.17 ± 0.068 Hz. The device arrays were also used to perform comprehensive measurement of the beating rate, rhythm, and contractility of the hiPSC-CMs and quantify the cell responses to different concentrations of agonists and antagonists, which altered the average contractile stress to the range of 1.15 ± 0.13 to 3.96 ± 0.53 kPa. The continuous measurement capability of the device arrays also enabled the generation of Poincaré plots for revealing subtle changes in the beating rhythm of hiPSC-CMs under different drug treatments.
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Affiliation(s)
- Li Wang
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
| | - Wenkun Dou
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
| | - Manpreet Malhi
- Hospital for Sick Children , Toronto ON M5G 1X8 , Canada
| | - Min Zhu
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
| | - Haijiao Liu
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
- Institute of Biomaterials and Biomedical Engineering , University of Toronto , Toronto ON M5S 3G9 , Canada
| | | | - Zhensong Xu
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
| | - Qili Zhao
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
| | - Jun Chen
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
| | - Siyu Chen
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
| | | | - Craig A Simmons
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
- Institute of Biomaterials and Biomedical Engineering , University of Toronto , Toronto ON M5S 3G9 , Canada
| | - Jason T Maynes
- Hospital for Sick Children , Toronto ON M5G 1X8 , Canada
| | - Yu Sun
- Department of Mechanical and Industrial Engineering , University of Toronto , Toronto ON M5S 3G8 , Canada
- Institute of Biomaterials and Biomedical Engineering , University of Toronto , Toronto ON M5S 3G9 , Canada
- Department of Electrical and Computer Engineering , University of Toronto , Toronto ON M5S 3G4 , Canada
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