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Sadan O, Jeong YS, Cohen-Sadan S, Sathialingam E, Buckley EM, Kandiah PA, Grossberg JA, Asbury W, Jusko WJ, Samuels OB. Cerebrospinal Fluid Pharmacokinetics of Nicardipine Following Intrathecal Administration in Subarachnoid Hemorrhage Patients. J Clin Pharmacol 2024. [PMID: 38923537 DOI: 10.1002/jcph.2488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 05/28/2024] [Indexed: 06/28/2024]
Abstract
Subarachnoid hemorrhage (SAH) is a devastating type of stroke, leading to high mortality and morbidity rates. Cerebral vasospasm and delayed cerebral ischemia (DCI) are common complications following SAH that contribute significantly to the poor outcomes observed in these patients. Intrathecal (IT) nicardipine delivered via an existing external ventricular drain is an off-label intervention that has been shown to be correlated with reduced DCI and improved patient outcomes. The current study aims to characterize the population pharmacokinetic (popPK) properties of intermittent IT nicardipine. Following informed consent, serial cerebrospinal fluid (CSF) samples were obtained from 16 SAH patients (50.4 ± 9.3 years old; 13 females) treated with IT nicardipine every 6 h (q6h, n = 8) or every 8 h (q8h, n = 8) for an average of 72 ± 21 doses. High-performance liquid chromatography was used to quantify CSF concentration from each sample. Our popPK analysis showed that the CSF pharmacokinetics of IT nicardipine in the cohort was adequately described by a two-compartment model with a lag time. Model parameter estimates were reliable (relative standard error <50%). Intracranial pressure influenced both the total clearance and the central volume of nicardipine (i.e., negative correlation, P <-.001). Calculated PK parameters were similar between q6h and q8h dosing regimens. Despite a small cohort of SAH patients, we successfully developed a popPK model to describe the nicardipine disposition kinetics in the CSF following IT administration. These findings may help inform future clinical trials designed to examine the optimal dosing of IT nicardipine.
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Affiliation(s)
- Ofer Sadan
- Department of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University School of Medicine, Atlanta, GA, USA
| | - Yoo-Seong Jeong
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Shany Cohen-Sadan
- Department of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University School of Medicine, Atlanta, GA, USA
| | - Eashani Sathialingam
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, GA, USA
| | - Erin M Buckley
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, GA, USA
- Department of Pediatrics, Emory School of Medicine, Atlanta, GA, USA
- Children's Research Scholar, Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Prem A Kandiah
- Department of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University School of Medicine, Atlanta, GA, USA
| | - Jonathan A Grossberg
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, USA
| | - William Asbury
- Department of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University School of Medicine, Atlanta, GA, USA
| | - William J Jusko
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Owen B Samuels
- Department of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University School of Medicine, Atlanta, GA, USA
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2
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Gao H, Wang Z, Yang F, Wang X, Wang S, Zhang Q, Liu X, Sun Y, Kong J, Yao J. Graphene-integrated mesh electronics with converged multifunctionality for tracking multimodal excitation-contraction dynamics in cardiac microtissues. Nat Commun 2024; 15:2321. [PMID: 38485708 PMCID: PMC10940632 DOI: 10.1038/s41467-024-46636-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/05/2024] [Indexed: 03/18/2024] Open
Abstract
Cardiac microtissues provide a promising platform for disease modeling and developmental studies, which require the close monitoring of the multimodal excitation-contraction dynamics. However, no existing assessing tool can track these multimodal dynamics across the live tissue. We develop a tissue-like mesh bioelectronic system to track these multimodal dynamics. The mesh system has tissue-level softness and cell-level dimensions to enable stable embedment in the tissue. It is integrated with an array of graphene sensors, which uniquely converges both bioelectrical and biomechanical sensing functionalities in one device. The system achieves stable tracking of the excitation-contraction dynamics across the tissue and throughout the developmental process, offering comprehensive assessments for tissue maturation, drug effects, and disease modeling. It holds the promise to provide more accurate quantification of the functional, developmental, and pathophysiological states in cardiac tissues, creating an instrumental tool for improving tissue engineering and studies.
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Affiliation(s)
- Hongyan Gao
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA, 01003, USA
| | - Zhien Wang
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Feiyu Yang
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, 01003, USA
| | - Xiaoyu Wang
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA, 01003, USA
| | - Siqi Wang
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA, 01003, USA
| | - Quan Zhang
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA, 01003, USA
| | - Xiaomeng Liu
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA, 01003, USA
| | - Yubing Sun
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, 01003, USA
- Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA, 01003, USA
- Department of Biomedical Engineering, University of Massachusetts, Amherst, MA, 01003, USA
| | - Jing Kong
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Jun Yao
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA, 01003, USA.
- Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA, 01003, USA.
- Department of Biomedical Engineering, University of Massachusetts, Amherst, MA, 01003, USA.
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3
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Bamgboye MA, Traficante MK, Owoyemi J, DiSilvestre D, Vieira DCO, Dick IE. Impaired Ca V1.2 inactivation reduces the efficacy of calcium channel blockers in the treatment of LQT8. J Mol Cell Cardiol 2022; 173:92-100. [PMID: 36272554 PMCID: PMC10583761 DOI: 10.1016/j.yjmcc.2022.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 10/12/2022] [Accepted: 10/16/2022] [Indexed: 11/23/2022]
Abstract
Mutations in the CaV1.2 L-type calcium channel can cause a profound form of long-QT syndrome known as long-QT type 8 (LQT8), which results in cardiac arrhythmias that are often fatal in early childhood. A growing number of such pathogenic mutations in CaV1.2 have been identified, increasing the need for targeted therapies. As many of these mutations reduce channel inactivation; resulting in excess Ca2+ entry during the action potential, calcium channel blockers (CCBs) would seem to represent a promising treatment option. Yet CCBs have been unsuccessful in the treatment of LQT8. Here, we demonstrate that this lack of efficacy likely stems from the impact of the mutations on CaV1.2 channel inactivation. As CCBs are known to preferentially bind to the inactivated state of the channel, mutation-dependent deficits in inactivation result in a decrease in use-dependent block of the mutant channel. Further, application of the CCB verapamil to induced pluripotent stem cell (iPSC) derived cardiomyocytes from an LQT8 patient demonstrates that this loss of use-dependent block translates to a lack of efficacy in correcting the LQT phenotype. As a growing number of channelopathic mutations demonstrate effects on channel inactivation, reliance on state-dependent blockers may leave a growing population of patients without a viable treatment option. This biophysical understanding of the interplay between inactivation deficits and state-dependent block may provide a new avenue to guide the development of improved therapies.
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Affiliation(s)
- Moradeke A Bamgboye
- Department of Physiology, University of Maryland, School of Medicine, Baltimore, MD, United States of America
| | - Maria K Traficante
- Department of Physiology, University of Maryland, School of Medicine, Baltimore, MD, United States of America
| | - Josiah Owoyemi
- Department of Physiology, University of Maryland, School of Medicine, Baltimore, MD, United States of America
| | - Deborah DiSilvestre
- Department of Physiology, University of Maryland, School of Medicine, Baltimore, MD, United States of America
| | - Daiana C O Vieira
- Department of Physiology, University of Maryland, School of Medicine, Baltimore, MD, United States of America
| | - Ivy E Dick
- Department of Physiology, University of Maryland, School of Medicine, Baltimore, MD, United States of America.
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4
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Gao H, Yang F, Sattari K, Du X, Fu T, Fu S, Liu X, Lin J, Sun Y, Yao J. Bioinspired two-in-one nanotransistor sensor for the simultaneous measurements of electrical and mechanical cellular responses. SCIENCE ADVANCES 2022; 8:eabn2485. [PMID: 36001656 PMCID: PMC9401615 DOI: 10.1126/sciadv.abn2485] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 07/11/2022] [Indexed: 05/21/2023]
Abstract
The excitation-contraction dynamics in cardiac tissue are the most important physiological parameters for assessing developmental state. We demonstrate integrated nanoelectronic sensors capable of simultaneously probing electrical and mechanical cellular responses. The sensor is configured from a three-dimensional nanotransistor with its conduction channel protruding out of the plane. The structure promotes not only a tight seal with the cell for detecting action potential via field effect but also a close mechanical coupling for detecting cellular force via piezoresistive effect. Arrays of nanotransistors are integrated to realize label-free, submillisecond, and scalable interrogation of correlated cell dynamics, showing advantages in tracking and differentiating cell states in drug studies. The sensor can further decode vector information in cellular motion beyond typical scalar information acquired at the tissue level, hence offering an improved tool for cell mechanics studies. The sensor enables not only improved bioelectronic detections but also reduced invasiveness through the two-in-one converging integration.
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Affiliation(s)
- Hongyan Gao
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
| | - Feiyu Yang
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
| | - Kianoosh Sattari
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA
| | - Xian Du
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
- Institute for Applied Life Sciences, University of Massachusetts, Amherst, Amherst, MA 01003, USA
| | - Tianda Fu
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
| | - Shuai Fu
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
| | - Xiaomeng Liu
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
| | - Jian Lin
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA
| | - Yubing Sun
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
- Institute for Applied Life Sciences, University of Massachusetts, Amherst, Amherst, MA 01003, USA
- Department of Biomedical Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
| | - Jun Yao
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
- Institute for Applied Life Sciences, University of Massachusetts, Amherst, Amherst, MA 01003, USA
- Department of Biomedical Engineering, University of Massachusetts, Amherst, Amherst, MA 01003, USA
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5
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Kilfoil P, Feng SL, Bassyouni A, Lee T, Leishman D, Li D, MacEwan DJ, Sharma P, Watt ED, Jenkinson S. Characterization of a high throughput human stem cell cardiomyocyte assay to predict drug-induced changes in clinical electrocardiogram parameters. Eur J Pharmacol 2021; 912:174584. [PMID: 34678241 DOI: 10.1016/j.ejphar.2021.174584] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/12/2021] [Accepted: 10/18/2021] [Indexed: 01/12/2023]
Abstract
Human induced pluripotent stem cell derived cardiomyocytes (hIPSC-CM's) play an increasingly important role in the safety profiling of candidate drugs. For such models to have utility a clear understanding of clinical translation is required. In the present study we examined the ability of our hIPSC-CM model to predict the clinically observed effects of a diverse set of compounds on several electrocardiogram endpoints, including changes in QT and QRS intervals. To achieve this, compounds were profiled in a novel high throughput voltage-sensitive dye platform. Measurements were taken acutely (30 min) and chronically (24 h) to ensure that responses from compounds with slow onset kinetics or that affected surface ion channel expression would be captured. In addition, to avoid issues associated with changes in free drug levels due to protein binding, assays were run in serum free conditions. Changes in hIPSC-CM threshold APD90 values correlated with compound plasma exposures that produced a +10 ms change in clinical QTc (Pearson r2 = 0.80). In addition, randomForest modeling showed high predictivity in defining TdP risk (AUROC value = 0.938). Risk associated with QRS prolongation correlated with an increase in action potential rise-time (AUROC value = 0.982). The in-depth understanding of the clinical translatability of our hIPSC-CM model positions this assay to play a key role in defining cardiac risk early in drug development. Moreover, the ability to perform longer term studies enables the detection of compounds that may not be highlighted by more acute assay formats, such as inhibitors of hERG trafficking.
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Affiliation(s)
- Peter Kilfoil
- Worldwide Research and Development, Pfizer Inc., La Jolla, CA, 92121, USA
| | - Shuyun Lily Feng
- Worldwide Research and Development, Pfizer Inc., La Jolla, CA, 92121, USA
| | - Asser Bassyouni
- Worldwide Research and Development, Pfizer Inc., La Jolla, CA, 92121, USA
| | - Tiffany Lee
- Worldwide Research and Development, Pfizer Inc., La Jolla, CA, 92121, USA
| | - Derek Leishman
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, 46285, USA
| | | | - David J MacEwan
- Department of Pharmacology and Therapeutics, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, L69 3GE, UK
| | - Parveen Sharma
- Department of Cardiovascular & Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, L69 3GE, UK
| | | | - Stephen Jenkinson
- Worldwide Research and Development, Pfizer Inc., La Jolla, CA, 92121, USA.
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6
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Scorpion Venom peptide, AGAP inhibits TRPV1 and potentiates the analgesic effect of lidocaine. Heliyon 2021; 7:e08560. [PMID: 35005265 PMCID: PMC8715296 DOI: 10.1016/j.heliyon.2021.e08560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/04/2021] [Accepted: 12/01/2021] [Indexed: 11/20/2022] Open
Abstract
The current study was designed to test the hypothesis that BmK AGAP (AGAP) potentiates the analgesic effect of lidocaine. The chronic constrictive injury was performed on 72 rats to induce a rapid onset and long-lasting pain. The rats were randomly assigned to one of six groups; Group A (n = 12) received an intrathecal administration of saline, Group B (n = 12) received an intrathecal injection of lidocaine, Group C (n = 12) received an intrathecal administration of AGAP, Group D, E, and F (n = 12 each) received an intrathecal administration of lidocaine 0.005 mg/ml + AGAP 25, 50, 100 μg/kg respectively. The von Frey filaments were used to assess mechanical allodynia. Nav1.7 and TRPV1 currents were recorded by the whole-cell aspiration patch-clamp technique, and KCNQ2/3 currents were recorded by the whole-cell drilling patch-clamp technique. The whole-cell aspiration patch-clamp technique showed that AGAP inhibited TRPV1and KCNQ2/3 currents and increased the analgesic effect of lidocaine. AGAP may have a synergistic effect with lidocaine which demonstrates a potential therapeutic approach for optimizing post-operative analgesia.
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7
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Cashman JR. Small Molecule Regulation of Stem Cells that Generate Bone, Chondrocyte, and Cardiac Cells. Curr Top Med Chem 2020; 20:2344-2361. [PMID: 32819246 DOI: 10.2174/1568026620666200820143912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/20/2020] [Accepted: 08/13/2020] [Indexed: 11/22/2022]
Abstract
Embryonic stem cells (ESCs) are stem cells (SCs) that can self-renew and differentiate into a myriad of cell types. The process of developing stemness is determined by signaling molecules that drive stem cells to a specific lineage. For example, ESCs can differentiate into mature cells (e.g., cardiomyocytes) and mature cardiomyocytes can be characterized for cell beating, action potential, and ion channel function. A goal of this Perspective is to show how small molecules can be used to differentiate ESCs into cardiomyocytes and how this can reveal novel aspects of SC biology. This approach can also lead to the discovery of new molecules of use in cardiovascular disease. Human induced pluripotent stem cells (hiPSCs) afford the ability to produce unlimited numbers of normal human cells. The creation of patient-specific hiPSCs provides an opportunity to study cell models of human disease. The second goal is to show that small molecules can stimulate hiPSC commitment to cardiomyocytes. How iPSCs can be used in an approach to discover new molecules of use in cardiovascular disease will also be shown in this study. Adult SCs, including mesenchymal stem cells (MSCs), can likewise participate in self-renewal and multilineage differentiation. MSCs are capable of differentiating into osteoblasts, adipocytes or chondrocytes. A third goal of this Perspective is to describe differentiation of MSCs into chondrogenic and osteogenic lineages. Small molecules can stimulate MSCs to specific cell fate both in vitro and in vivo. In this Perspective, some recent examples of applying small molecules for osteogenic and chondrogenic cell fate determination are summarized. Underlying molecular mechanisms and signaling pathways involved are described. Small molecule-based modulation of stem cells shows insight into cell regulation and potential approaches to therapeutic strategies for MSC-related diseases.
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Affiliation(s)
- John R Cashman
- Human BioMolecular Research Institute, 5310 Eastgate Mall, San Diego, CA 92121, United States
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8
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Trovato C, Passini E, Nagy N, Varró A, Abi-Gerges N, Severi S, Rodriguez B. Human Purkinje in silico model enables mechanistic investigations into automaticity and pro-arrhythmic abnormalities. J Mol Cell Cardiol 2020; 142:24-38. [PMID: 32251669 PMCID: PMC7294239 DOI: 10.1016/j.yjmcc.2020.04.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 03/30/2020] [Accepted: 04/01/2020] [Indexed: 02/06/2023]
Abstract
Cardiac Purkinje cells (PCs) are implicated in lethal arrhythmias caused by cardiac diseases, mutations, and drug action. However, the pro-arrhythmic mechanisms in PCs are not entirely understood, particularly in humans, as most investigations are conducted in animals. The aims of this study are to present a novel human PCs electrophysiology biophysically-detailed computational model, and to disentangle ionic mechanisms of human Purkinje-related electrophysiology, pacemaker activity and arrhythmogenicity. The new Trovato2020 model incorporates detailed Purkinje-specific ionic currents and Ca2+ handling, and was developed, calibrated and validated using human experimental data acquired at multiple frequencies, both in control conditions and following drug application. Multiscale investigations were performed in a Purkinje cell, in fibre and using an experimentally-calibrated population of PCs to evaluate biological variability. Simulations demonstrate the human Purkinje Trovato2020 model is the first one to yield: (i) all key AP features consistent with human Purkinje recordings; (ii) Automaticity with funny current up-regulation (iii) EADs at slow pacing and with 85% hERG block; (iv) DADs following fast pacing; (v) conduction velocity of 160 cm/s in a Purkinje fibre, as reported in human. The human in silico PCs population highlights that: (1) EADs are caused by ICaL reactivation in PCs with large inward currents; (2) DADs and triggered APs occur in PCs experiencing Ca2+ accumulation, at fast pacing, caused by large L-type calcium current and small Na+/Ca2+ exchanger. The novel human Purkinje model unlocks further investigations into the role of cardiac Purkinje in ventricular arrhythmias through computer modeling and multiscale simulations.
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Affiliation(s)
- Cristian Trovato
- Department of Computer Science, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford OX13QD, United Kingdom.
| | - Elisa Passini
- Department of Computer Science, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford OX13QD, United Kingdom
| | - Norbert Nagy
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Szeged H-6720, Hungary; Department of Pharmacology and Pharmacotherapy, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary
| | - András Varró
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Szeged H-6720, Hungary; Department of Pharmacology and Pharmacotherapy, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary
| | - Najah Abi-Gerges
- AnaBios Corporation, San Diego Science Center, San Diego, CA 92109, USA
| | - Stefano Severi
- Department of Electrical, Electronic and Information Engineering, University of Bologna, Cesena 47521, Italy
| | - Blanca Rodriguez
- Department of Computer Science, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford OX13QD, United Kingdom.
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9
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An JR, Li H, Seo MS, Park WS. Inhibition of voltage-dependent K + current in rabbit coronary arterial smooth muscle cells by the class Ic antiarrhythmic drug propafenone. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2018; 22:597-605. [PMID: 30181706 PMCID: PMC6115351 DOI: 10.4196/kjpp.2018.22.5.597] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 07/26/2018] [Accepted: 07/26/2018] [Indexed: 12/30/2022]
Abstract
In this study, we demonstrated the inhibitory effect of the Class Ic antiarrhythmic agent propafenone on voltage-dependent K+ (Kv) channels using freshly isolated coronary artery smooth muscle cells from rabbits. The Kv current amplitude was progressively inhibited by propafenone in a dose-dependent manner, with an apparent IC50 value of 5.04±1.05 µM and a Hill coefficient of 0.78±0.06. The application of propafenone had no significant effect on the steady-state activation and inactivation curves, indicating that propafenone did not affect the voltage-sensitivity of Kv channels. The application of train pulses at frequencies of 1 or 2 Hz progressively increased the propafenone-induced inhibition of the Kv current. Furthermore, the inactivation recovery time constant was increased after the application of propafenone, suggesting that the inhibitory action of propafenone on Kv current is partially use-dependent. Pretreatment with Kv1.5, Kv2.1 or Kv7 inhibitor did not change the inhibitory effect of propafenone on the Kv current. Together, these results suggest that propafenone inhibits the vascular Kv channels in a dose- and use-dependent manner, regardless of Na+ channel inhibition.
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Affiliation(s)
- Jin Ryeol An
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Hongliang Li
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Mi Seon Seo
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Won Sun Park
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
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10
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An Z, Yang G, Liu X, Zhang Z, Liu G. New Progress in Understanding the Cellular Mechanisms of Anti-arrhythmic Drugs. Open Life Sci 2018; 13:335-339. [PMID: 33817101 PMCID: PMC7874705 DOI: 10.1515/biol-2018-0041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 06/08/2018] [Indexed: 11/30/2022] Open
Abstract
Antiarrhythmic drugs are widely used, however, their efficacy is moderate and they can have serious side effects. Even if catheter ablation is effective for the treatment of atrial fibrillation and ventricular tachycardia, antiarrhythmic drugs are still important tools for the treatment of arrhythmia. Despite efforts, the development of antiarrhythmic drugs is still slow due to the limited understanding of the role of various ionic currents. This review summarizes the new targets and mechanisms of antiarrhythmic drugs.
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Affiliation(s)
- Zhe An
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
| | - Guang Yang
- Department of Molecular Biology, College of Basic Medical Science, Jilin University, Changchun 130033, Jilin, P.R. China
| | - Xuanxuan Liu
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
| | - Zhongfan Zhang
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
| | - Guohui Liu
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
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11
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Kim HS, Li H, Kim HW, Shin SE, Seo MS, An JR, Ha KS, Han ET, Hong SH, Choi IW, Choi G, Lee DS, Park WS. Escitalopram, a selective serotonin reuptake inhibitor, inhibits voltage-dependent K + channels in coronary arterial smooth muscle cells. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2017; 21:415-421. [PMID: 28706455 PMCID: PMC5507780 DOI: 10.4196/kjpp.2017.21.4.415] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 02/27/2017] [Accepted: 03/08/2017] [Indexed: 01/06/2023]
Abstract
We investigated the inhibitory effect of escitalopram, a selective serotonin reuptake inhibitor (SSRI), on voltage-dependent K+ (Kv) channels in freshly separated from rabbit coronary arterial smooth muscle cells. The application of escitalopram rapidly inhibited vascular Kv channels. Kv currents were progressively inhibited by an increase in the concentrations of escitalopram, suggesting that escitalopram inhibited vascular Kv currents in a concentration-dependent manner. The IC50 value and Hill coefficient for escitalopram-induced inhibition of Kv channels were 9.54±1.33 µM and 0.75±0.10, respectively. Addition of escitalopram did not alter the steady-state activation and inactivation curves, suggesting that the voltage sensors of the channels were not affected. Pretreatment with inhibitors of Kv1.5 and/or Kv2.1 did not affect the inhibitory action of escitalopram on vascular Kv channels. From these results, we concluded that escitalopram decreased the vascular Kv current in a concentration-dependent manner, independent of serotonin reuptake inhibition.
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Affiliation(s)
- Han Sol Kim
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Hongliang Li
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Hye Won Kim
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Sung Eun Shin
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Mi Seon Seo
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Jin Ryeol An
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Kwon-Soo Ha
- Department of Molecular and Cellular Biochemistry, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Eun-Taek Han
- Department of Medical Environmental Biology and Tropical Medicine, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Seok-Ho Hong
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Il-Whan Choi
- Department of Microbiology, Inje University College of Medicine, Busan 47392, Korea
| | - Grace Choi
- Department of Applied Research, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea
| | - Dae-Sung Lee
- Department of Applied Research, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea
| | - Won Sun Park
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
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