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Lai MC, Wu SN, Huang CW. Rufinamide, a Triazole-Derived Antiepileptic Drug, Stimulates Ca 2+-Activated K + Currents While Inhibiting Voltage-Gated Na + Currents. Int J Mol Sci 2022; 23:ijms232213677. [PMID: 36430153 PMCID: PMC9697614 DOI: 10.3390/ijms232213677] [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: 09/29/2022] [Revised: 10/27/2022] [Accepted: 11/03/2022] [Indexed: 11/10/2022] Open
Abstract
Rufinamide (RFM) is a clinically utilized antiepileptic drug that, as a triazole derivative, has a unique structure. The extent to which this drug affects membrane ionic currents remains incompletely understood. With the aid of patch clamp technology, we investigated the effects of RFM on the amplitude, gating, and hysteresis of ionic currents from pituitary GH3 lactotrophs. RFM increased the amplitude of Ca2+-activated K+ currents (IK(Ca)) in pituitary GH3 lactotrophs, and the increase was attenuated by the further addition of iberiotoxin or paxilline. The addition of RFM to the cytosolic surface of the detached patch of membrane resulted in the enhanced activity of large-conductance Ca2+-activated K+ channels (BKCa channels), and paxilline reversed this activity. RFM increased the strength of the hysteresis exhibited by the BKCa channels and induced by an inverted isosceles-triangular ramp pulse. The peak and late voltage-gated Na+ current (INa) evoked by rapid step depolarizations were differentially suppressed by RFM. The molecular docking approach suggested that RFM bound to the intracellular domain of KCa1.1 channels with amino acid residues, thereby functionally affecting BKCa channels' activity. This study is the first to present evidence that, in addition to inhibiting the INa, RFM effectively modifies the IK(Ca), which suggests that it has an impact on neuronal function and excitability.
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Affiliation(s)
- Ming-Chi Lai
- Department of Pediatrics, Chi-Mei Medical Center, Tainan 71004, Taiwan
| | - Sheng-Nan Wu
- Department of Physiology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Correspondence: (S.-N.W.); (C.-W.H.)
| | - Chin-Wei Huang
- Department of Neurology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
- Correspondence: (S.-N.W.); (C.-W.H.)
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Kirkpatrick L, Waters J, O'Neal MA. Preventive Approaches in Women's Neurology: Prepartum, Pregnancy, and Postpartum. Semin Neurol 2022; 42:665-678. [PMID: 36216357 DOI: 10.1055/a-1958-0633] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Women's neurology is the subspecialty within neurology concerned with the distinct healthcare needs of women. In this article, we review current literature and expert management strategies regarding disease-specific neurologic concerns of women, with an emphasis on issues related to contraception, pregnancy, and lactation. Health conditions that we discuss in this article include epilepsy, headache, stroke, multiple sclerosis, and Chiari I malformation. Current findings on neurologic disease in women suggest that many women with neurologic disease can safely manage their disease during pregnancy and have healthy children, though pregnancy planning is important in many conditions to mitigate risks and effective contraceptive management is important when pregnancy prevention is desired.
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Affiliation(s)
- Laura Kirkpatrick
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Janet Waters
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Mary Angela O'Neal
- Department of Neurology, Brigham and Women's Hospital, Boston, Massachusetts
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Contraception and Reproductive Health Care for Adolescent and Young Adult Women with Epilepsy. J Pediatr 2022; 241:229-236. [PMID: 34728232 DOI: 10.1016/j.jpeds.2021.10.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 10/16/2021] [Accepted: 10/27/2021] [Indexed: 11/21/2022]
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Łukawski K, Czuczwar SJ. Developing precision treatments for epilepsy using patient and animal models. Expert Rev Neurother 2020; 21:1241-1250. [PMID: 33339471 DOI: 10.1080/14737175.2021.1866989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Introduction: Phenytoin was the first antiepileptic drug (AED) discovered in an animal model of seizures whose clinical efficacy was subsequently confirmed. This clearly indicated that a search for other AEDs had to consider animal studies.Areas covered: Main seizure tests used for the evaluation of possible anticonvulsive activity of potential anticonvulsants and their predictive values have been reviewed. Procedures used for the estimation of antiepileptogenic effects have been also included.Expert opinion: First-line seizure models comprise maximal electroshock (MES)-, pentylenetetrazol (PTZ)- and kindling-induced convulsions in rodents. The MES test may be considered as a convenient and easy model of generalized tonic-clonic seizures, PTZ test - as a model of generalized myoclonic seizures and to a certain degree - absence seizures. Kindled seizures (for example, from amygdala) may be regarded as a model of focal seizures. Some tests have been suggested for the search of AEDs effective in drug-resistant seizures - for instance, 6 Hz (44 mA) test or intrahippocampal kainate model of mesial temporal lobe epilepsy. There are also recommendations from experimental epileptology on synergistic AED combinations for patients with drug-resistant seizures. The clinical evidence on this issue is scarce and favors a combined treatment with valproate + lamotrigine.
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Affiliation(s)
- Krzysztof Łukawski
- Department of Physiopathology, Institute of Rural Health, Lublin, Poland.,Department of Pathophysiology, Medical University of Lublin, Lublin, Poland
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Zhang Z, Xu L, Zhang Z, Ding H, Rayburn ER, Li H. The need for contraception in patients taking prescription drugs: a review of FDA warning labels, duration of effects, and mechanisms of action. Expert Opin Drug Saf 2018; 17:1171-1183. [PMID: 30394114 DOI: 10.1080/14740338.2018.1544617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Introduction: This review provides a guide for the rational use of prescription drugs in patients of reproductive age. Areas covered: A comprehensive retrieval of the labels of FDA-approved drugs was performed to identify drugs where the label recommends contraceptive use during and/or after treatment. The acquired data were analyzed and organized into a table. Contraception was recommended or mandated for 268 single-ingredient drugs. These could be divided into four main categories, with many having effects across several categories: 177 drugs required contraception because they were associated with pregnancy loss or stillbirth, 177 drugs were associated with teratogenesis, 136 were associated with non-teratogenic adverse peri- or postnatal effects on the fetus (e.g. low birth weight), and 44 were associated with decreased efficacy of contraception or a change in ovulatory cycle. We also discuss the period of time contraception is required, as well as the known or hypothesized reasons for the reproductive toxicity of these agents. Expert opinion: We have provided a comprehensive overview of the FDA-approved drugs where the warning labels currently stipulate that contraception should be used. Although other references are available for clinicians, this review provides a useful source of information regarding the single-ingredient prescription drugs that may affect the outcome of pregnancy. This information is particularly relevant for researchers, as it provides an overview of the different drugs with reproductive toxicity, and because it highlights the specific needs for future research. In particular, more work (especially epidemiological studies) is needed to clarify the clinical relevance of these findings, most of which were obtained through animal studies.
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Affiliation(s)
- Zhanhu Zhang
- a Department of Clinical Laboratory Medicine , Nantong Maternal and Child Health Hospital , Jiangsu , China
| | - Lili Xu
- a Department of Clinical Laboratory Medicine , Nantong Maternal and Child Health Hospital , Jiangsu , China
| | - Zhenyu Zhang
- a Department of Clinical Laboratory Medicine , Nantong Maternal and Child Health Hospital , Jiangsu , China
| | - Hongxia Ding
- b Pharmacodia (Beijing) Co., LTD , Beijing , China
| | | | - Haibo Li
- a Department of Clinical Laboratory Medicine , Nantong Maternal and Child Health Hospital , Jiangsu , China
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Thome-Souza S, Kadish NE, Ramgopal S, Sánchez Fernández I, Bergin AM, Bolton J, Harini C, Libenson M, Olson H, Peters J, Poduri A, Rotenberg A, Takeoka M, Kothare SV, Kapur K, Bourgeois BFD, Loddenkemper T. Safety and retention rate of rufinamide in 300 patients: A single pediatric epilepsy center experience. Epilepsia 2014; 55:1235-44. [DOI: 10.1111/epi.12689] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Sigride Thome-Souza
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
- Department and Institute of Psychiatry; Faculty of Medicine; University of São Paulo; São Paulo Brazil
| | - Navah E. Kadish
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Sriram Ramgopal
- Department of Pediatrics; The Children's Hospital of Pittsburgh; University of Pittsburgh Medical Center; Pittsburgh Pennsylvania U.S.A
| | - Iván Sánchez Fernández
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
- Department of Child Neurology; Hospital Sant Joan de Déu; University of Barcelona; Barcelona Spain
| | - Ann M. Bergin
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Jeffrey Bolton
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Chellamani Harini
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Mark Libenson
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Heather Olson
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Jurriaan Peters
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Annapurna Poduri
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Alexander Rotenberg
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Masanori Takeoka
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Sanjeev V. Kothare
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
- Langone School of Medicine; New York University Medical Center; New York New York U.S.A
| | - Kush Kapur
- Department of Neurology; Clinical Research Center; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Blaise F. D. Bourgeois
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
| | - Tobias Loddenkemper
- Division of Epilepsy and Clinical Neurophysiology; Department of Neurology; Boston Children's Hospital; Boston Massachusetts U.S.A
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Mula M. Recent and future antiepileptic drugs and their impact on cognition: what can we expect? Expert Rev Neurother 2013; 12:667-71. [PMID: 22650169 DOI: 10.1586/ern.12.51] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cognitive problems are frequently observed in patients with epilepsy and the relative contribution of antiepileptic drugs (AEDs) in this respect is determinant. During the past few years, a number of new AEDs have been introduced, and new compounds will be probably available in the forthcoming years. The ideal AED would be the one characterized by good efficacy with no negative effects on cognitive functions, mood and behavior. This paper is aimed at discussing the potential impact on cognition of a number of new compounds, namely lacosamide, rufinamide, retigabine, eslicarbazepine acetate, brivaracetam, perampanel and ganaxolone. In almost all cases, specific data on cognitive functions are not yet available, and it is possible only to speculate on their potential impact considering the mechanism of action and the adverse event profile in placebo-controlled studies. Lacosamide, eslicarbazepine acetate and probably brivaracetam are promising and will probably exhibit very limited impact on cognition. Conversely, retigabine may be more problematic, needing low starting doses and slow titration rates to improve cognitive tolerability. Data on rufinamide are restricted to special populations such as Lennox-Gastaut syndrome. Perampanel and ganaxolone are still in Phase III development, but the mechanism of action of these compounds is in line with a more sedative than neutral profile.
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Affiliation(s)
- Marco Mula
- Division of Neurology, Amedeo Avogadro University, C.so Mazzini, 18 - 28100 Novara, Italy.
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Bentué-Ferrer D, Tribut O, Verdier MC. Suivi thérapeutique pharmacologique du rufinamide. Therapie 2012; 67:161-5. [DOI: 10.2515/therapie/2012013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Accepted: 10/20/2011] [Indexed: 11/20/2022]
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