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Yeh CC, Chiu CC, Wang JJ, Chou AK, Chen YW, Zhu GC, Hung CH. Intrathecal pramipexole and selegiline for sensory and motor block in rats. Pharmacol Rep 2022; 74:470-480. [PMID: 35554880 DOI: 10.1007/s43440-022-00368-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 04/08/2022] [Accepted: 04/12/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND The purpose of the study was to investigate spinal sensory and motor block by antiparkinsonian drugs (pramipexole and selegiline), and the combination of pramipexole and the local anesthetic lidocaine. METHODS Using a technique of spinal blockade in rats, the effects of pramipexole, selegiline, and coadministration of pramipexole and lidocaine on spinal blockades of motor and sensory function were investigated. RESULTS Under a concentration of 100 mM, pramipexole displayed more potent and had a longer duration of nociceptive, proprioceptive, and motor block than selegiline, whereas pramipexole and selegiline were less potent in comparison to lidocaine. Pramipexole produced spinal nociceptive, proprioceptive, and motor blocks in a dose-related manner. On the ED50 (50% effective dose) basis, the rank-order potency on nociceptive, proprioceptive, and motor block was pramipexole < lidocaine. The spinal block duration of pramipexole was greater than lidocaine at every equipotent dose tested (ED25, ED50, and ED75). Coadministration of lidocaine (ED50 or ED95) with pramipexole (4.5 μmol/kg) improved the effect (efficacy) and duration of the spinal block. CONCLUSIONS Pramipexole and selegiline were less potent than lidocaine to block sensory and motor responses. The duration of the spinal anesthetic effect of pramipexole was longer than lidocaine. At a non-effective dose, pramipexole increased the duration of efficacy of lidocaine.
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Affiliation(s)
- Chun-Chang Yeh
- Department of Anesthesiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
| | - Chong-Chi Chiu
- School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
- Department of General Surgery, E-Da Cancer Hospital, Kaohsiung, Taiwan
| | - Jhi-Joung Wang
- Department of Anesthesiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
| | - An-Kuo Chou
- Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan
| | - Yu-Wen Chen
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
- Department of Physical Therapy, College of Health Care, China Medical University, Taichung, Taiwan
| | - Guan-Cheng Zhu
- Department of Physical Therapy, College of Medicine, National Cheng Kung University, No.1 Ta-Hsueh Road, Tainan, Taiwan
| | - Ching-Hsia Hung
- Department of Physical Therapy, College of Medicine, National Cheng Kung University, No.1 Ta-Hsueh Road, Tainan, Taiwan.
- Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Chou AK, Chiu CC, Han MM, Chen YW, Wang JJ, Hung CH. Intrathecal pramoxine causes long-lasting spinal sensory and motor block in rats. J Pharm Pharmacol 2018; 70:543-549. [PMID: 29441574 DOI: 10.1111/jphp.12894] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Accepted: 01/13/2018] [Indexed: 02/05/2023]
Abstract
OBJECTIVES The objective of this experiment was to investigate spinal anaesthetic effects of pramoxine and its comparison with bupivacaine, a long-lasting local anaesthetic. METHODS After intrathecal injection, three neurobehavioural assessments, which consisted of nociceptive, proprioceptive and motor block, were constructed in rats. The effects of bupivacaine and pramoxine (four doses of each drug) in a dose-related manner were conducted to obtain the ED50 (50% effective dose). Pramoxine potency and duration at provoking spinal nociceptive, proprioceptive and motor block were compared with those of bupivacaine. KEY FINDINGS We manifested that pramoxine provoked dose-relatedly spinal blockades of nociception, proprioception and motor function. Based on the ED50 , the rank potency at producing spinal nociceptive, proprioceptive and motor block was bupivacaine (0.90 (0.82-1.02), 1.00 (0.92-1.08) and 1.16 (1.02-1.34) μmol/kg) greater (P < 0.01 for the differences) than pramoxine (15.47 (14.04-17.05), 16.46 (15.06-17.99), and 17.77 (16.48-19.15) μmol/kg). The spinal block duration created by bupivacaine was not predominantly different (P > 0.05 for the differences) from that created by pramoxine at the equipotent doses (ED75 , ED50 and ED25 ). CONCLUSIONS Our preclinical experiment indicated that pramoxine elicited a dose-related spinal block, was less potent than bupivacaine and had a similar duration of spinal block compared with bupivacaine.
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Affiliation(s)
- An-Kuo Chou
- Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan
| | - Chong-Chi Chiu
- Department of General Surgery, Chi Mei Medical Center, Tainan and Liouying, Taiwan
- Department of Electrical Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Ming-Ming Han
- Department of Anesthesiology, Anhui Provincial Hospital, Anhui Medical University, Hefei, China
| | - Yu-Wen Chen
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
- Department of Physical Therapy, College of Health Care, China Medical University, Taichung, Taiwan
| | - Jhi-Joung Wang
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
| | - Ching-Hsia Hung
- Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Chen YW, Chen CM, Liu KS, Wang JJ, Hung CH. 2-Adamantanamine produces prolonged spinal block in rats. Neurosci Lett 2017; 653:168-172. [DOI: 10.1016/j.neulet.2017.05.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/22/2017] [Accepted: 05/22/2017] [Indexed: 02/07/2023]
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Hof T, Sallé L, Coulbault L, Richer R, Alexandre J, Rouet R, Manrique A, Guinamard R. TRPM4 non-selective cation channels influence action potentials in rabbit Purkinje fibres. J Physiol 2015; 594:295-306. [PMID: 26548780 DOI: 10.1113/jp271347] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 10/29/2015] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS The transient receptor potential melastatin 4 (TRPM4) inhibitor 9-phenanthrol reduces action potential duration in rabbit Purkinje fibres but not in ventricle. TRPM4-like single channel activity is observed in isolated rabbit Purkinje cells but not in ventricular cells. The TRPM4-like current develops during the notch and early repolarization phases of the action potential in Purkinje cells. ABSTRACT Transient receptor potential melastatin 4 (TRPM4) Ca(2+)-activated non-selective cation channel activity has been recorded in cardiomyocytes and sinus node cells from mammals. In addition, TRPM4 gene mutations are associated with human diseases of cardiac conduction, suggesting that TRPM4 plays a role in this aspect of cardiac function. Here we evaluate the TRPM4 contribution to cardiac electrophysiology of Purkinje fibres. Ventricular strips with Purkinje fibres were isolated from rabbit hearts. Intracellular microelectrodes recorded Purkinje fibre activity and the TRPM4 inhibitor 9-phenanthrol was applied to unmask potential TRPM4 contributions to the action potential. 9-Phenanthrol reduced action potential duration measured at the point of 50 and 90% repolarization with an EC50 of 32.8 and 36.1×10(-6) mol l(-1), respectively, but did not modulate ventricular action potentials. Inside-out patch-clamp recordings were used to monitor TRPM4 activity in isolated Purkinje cells. TRPM4-like single channel activity (conductance = 23.8 pS; equal permeability for Na(+) and K(+); sensitivity to voltage, Ca(2+) and 9-phenanthrol) was observed in 43% of patches from Purkinje cells but not from ventricular cells (0/16). Action potential clamp experiments performed in the whole-cell configuration revealed a transient inward 9-phenanthrol-sensitive current (peak density = -0.65 ± 0.15 pA pF(-1); n = 5) during the plateau phases of the Purkinje fibre action potential. These results show that TRPM4 influences action potential characteristics in rabbit Purkinje fibres and thus could modulate cardiac conduction and be involved in triggering arrhythmias.
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Affiliation(s)
- Thomas Hof
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
| | - Laurent Sallé
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
| | - Laurent Coulbault
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
| | - Romain Richer
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
| | - Joachim Alexandre
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
| | - René Rouet
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
| | - Alain Manrique
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
| | - Romain Guinamard
- Groupe Signalisation, Electrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, Unicaen, Normandie Université, EA 4650, Caen, France
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Chen YW, Chiu CC, Liu KS, Hung CH, Wang JJ. Memantine elicits spinal blockades of motor function, proprioception, and nociception in rats. Fundam Clin Pharmacol 2015; 29:567-74. [PMID: 26301611 DOI: 10.1111/fcp.12142] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/07/2015] [Accepted: 08/18/2015] [Indexed: 02/05/2023]
Abstract
Although memantine blocks sodium currents and produces local skin anesthesia, spinal anesthesia with memantine is unknown. The purpose of the study was to evaluate the local anesthetic effect of memantine in spinal anesthesia and its comparison with a widely used local anesthetic lidocaine. After intrathecally injecting the rats with five doses of each drug, the dose-response curves of memantine and lidocaine were constructed. The potencies of the drugs and durations of spinal anesthetic effects on motor function, proprioception, and nociception were compared with those of lidocaine. We showed that memantine produced dose-dependent spinal blockades in motor function, proprioception, and nociception. On a 50% effective dose (ED50 ) basis, the rank of potency was lidocaine greater than memantine (P < 0.05 for the differences). At the equipotent doses (ED25 , ED50 , ED75 ), the block duration produced by memantine was longer than that produced by lidocaine (P < 0.05 for the differences). Memantine, but not lidocaine, displayed more sensory/nociceptive block than motor block. The preclinical data demonstrated that memantine is less potent than lidocaine, whereas memantine produces longer duration of spinal anesthesia than lidocaine. Memantine shows a more sensory-selective action over motor blockade.
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Affiliation(s)
- Yu-Wen Chen
- Department of Physical Therapy & Graduate Institute of Rehabilitation Science, College of Health Care, China Medical University, Taichung, Taiwan
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
| | - Chong-Chi Chiu
- Department of General Surgery, Chi Mei Medical Center, Tainan and Liouying, Taiwan
- Department of Electrical Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Kuo-Sheng Liu
- Department of Pharmacy, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Ching-Hsia Hung
- Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Jhi-Joung Wang
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
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Mamou Z, Descotes J, Chevalier P, Bui-Xuan B, Romestaing C, Timour Q. Electrophysiological, haemodynamic, and mitochondrial alterations induced by levobupivacaine during myocardial ischemia in a pig model: protection by lipid emulsions? Fundam Clin Pharmacol 2015; 29:439-49. [PMID: 26118736 DOI: 10.1111/fcp.12131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 03/31/2015] [Accepted: 05/07/2015] [Indexed: 11/30/2022]
Abstract
Accidental intravascular or high-dose injection of local anesthetics (LA) can result in serious, potentially life-threatening complications. Indeed, adequate supportive measures and the administration of lipid emulsions are required in such complications. The study's objectives were threefold: (i) evaluate the myocardial toxicity of levobupivacaine when administered intravenously; (ii) investigate levobupivacaine toxicity on cardiomyocytes mitochondrial functions and cellular structure; (iii) assess the protective effects of a lipid emulsion in the presence or absence of myocardial ischemia. Domestic pigs randomized into two groups of 24 animals each, with either preserved coronary circulation or experimental myocardial ischemia. Six animals from each group received either: (i) single IV injection of saline, (ii) lipid emulsion (Intralipid(®) ), (iii) levobupivacaine, (iv) combination levobupivacaine-Intralipid(®) . Serially measured endpoints included: heart rate, duration of the monophasic action potentials (dMAP), mean arterial pressure, and peak of the time derivative of left ventricular pressure (LV dP/dtmax ). In addition, the following cardiomyocytes mitochondrial functions were measured: reactive oxygen species (ROS) production, oxidative phosphorylation, and calcium retention capacity (CRC) as well as the consequences of ROS production on lipids, proteins, and DNA. IV injection of levobupivacaine induced sinus bradycardia and reduced dMAP and LV dP/dtmax . At the mitochondrial level, oxygen consumption and CRC were decreased. In contrast, ROS production was increased leading to enhanced lipid peroxidation and structural alterations of proteins and DNA. Myocardial ischemia was associated with global worsening of all changes. Intralipid(®) quickly improved haemodynamics. However, beneficial effects of Intralipid(®) were less clear after myocardial ischemia.
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Affiliation(s)
- Zahida Mamou
- Neurocardiology Unit, EA 4612, Claude Bernard University, F-69008 Lyon, France
| | - Jacques Descotes
- Neurocardiology Unit, EA 4612, Claude Bernard University, F-69008 Lyon, France
| | - Philippe Chevalier
- Neurocardiology Unit, EA 4612, Claude Bernard University, F-69008 Lyon, France
| | - Bernard Bui-Xuan
- Neurocardiology Unit, EA 4612, Claude Bernard University, F-69008 Lyon, France
| | - Caroline Romestaing
- Laboratory of Ecology of Natural and Anthropized Hydrosystems, CNRS UMR 5023, Claude Bernard University, F-69100 Villeurbanne, France.,Laboratory of Extrem Physiology, Claude Bernard University, F-69100 Villeurbanne, France
| | - Quadiri Timour
- Neurocardiology Unit, EA 4612, Claude Bernard University, F-69008 Lyon, France
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