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Paul T, Basak S, Nanjegowda MV, Punniyamurthy T. Biorelevant Weakly Coordinating Directing Group Assisted C-H Alkenylation with Cyclopropanols via Sequential C-H/C-C Activation. Org Lett 2023; 25:8975-8980. [PMID: 38071624 DOI: 10.1021/acs.orglett.3c03493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
A weakly coordinating biorelevant intrinsic directing group (DG) assisted site-selective C-H alkenylation via sequential C-H/C-C bond activation has been accomplished under Ru(II)-catalysis using readily accessible cyclopropyl alcohol as an alkenyl surrogate. Utilization of an intrinsic DG, exclusive regioselectivity, functional group diversity, late-stage natural product and drug mutations are the important practical features.
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Affiliation(s)
- Tripti Paul
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Shubhajit Basak
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Maniya V Nanjegowda
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
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Bensken WP, Fernandez Baca Vaca G, Alberti PM, Khan OI, Ciesielski TH, Jobst BC, Williams SM, Stange KC, Sajatovic M, Koroukian SM. Racial and Ethnic Differences in Antiseizure Medications Among People With Epilepsy on Medicaid: A Case of Potential Inequities. Neurol Clin Pract 2023; 13:e200101. [PMID: 36865639 PMCID: PMC9973322 DOI: 10.1212/cpj.0000000000200101] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 10/03/2022] [Indexed: 01/13/2023]
Abstract
Background and Objectives Being on a newer, second-, and third-generation antiseizure medication (ASM) may represent an important marker of quality of care for people with epilepsy. We sought to examine whether there were racial/ethnic differences in their use. Methods Using Medicaid claims data, we identified the type and number of ASMs, as well as the adherence, for people with epilepsy over a 5-year period (2010-2014). We used multilevel logistic regression models to examine the association between newer-generation ASMs and adherence. We then examined whether there were racial/ethnic differences in ASM use in models adjusted for demographics, utilization, year, and comorbidities. Results Among 78,534 adults with epilepsy, 17,729 were Black, and 9,376 were Hispanic. Overall, 25.6% were on older ASMs, and being solely on second-generation ASMs during the study period was associated with better adherence (adjusted odds ratio: 1.17, 95% confidence interval [CI]: 1.11-1.23). Those who saw a neurologist (3.26, 95% CI: 3.13-3.41) or who were newly diagnosed (1.29, 95% CI: 1.16-1.42) had higher odds of being on newer ASMs. Importantly, Black (0.71, 95% CI: 0.68-0.75), Hispanic (0.93, 95% CI: 0.88-0.99), and Native Hawaiian and Other Pacific Island individuals (0.77, 95% CI: 0.67-0.88) had lower odds of being on newer ASMs when compared with White individuals. Discussion Generally, racial and ethnic minoritized people with epilepsy have lower odds of being on newer-generation ASMs. Greater adherence by people who were only on newer ASMs, their greater use among people seeing a neurologist, and the opportunity of a new diagnosis point to actionable leverage points for reducing inequities in epilepsy care.
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Affiliation(s)
- Wyatt P Bensken
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Guadalupe Fernandez Baca Vaca
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Philip M Alberti
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Omar I Khan
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Timothy H Ciesielski
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Barbara C Jobst
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Scott M Williams
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Kurt C Stange
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Martha Sajatovic
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
| | - Siran M Koroukian
- Department of Population and Quantitative Health Sciences (WPB, THC, SMW, KCS, MS), School of Medicine, Case Western Reserve University, Cleveland, OH; Department of Neurology (GFBV), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, Cleveland, OH; AAMC Center for Health Justice (PMA), Association of American Medical Colleges, Washington, DC; Epilepsy Center of Excellence (OIK), Baltimore VA Medical Center, US Department of Veterans Affairs, MD; Department of Neurology and Geisel School of Medicine (BCJ), Dartmouth-Hitchcock Medical Center, Lebanon, NH; Center for Community Health Integration (KCS, MS), Department of Sociology, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland; and Departments of Neurology and Psychiatry (SMK), University Hospitals Cleveland Medical Center and School of Medicine, Case Western Reserve University, OH
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Terman SW, Lin CC, Kerr WT, DeLott LB, Callaghan BC, Burke JF. Changes in the Use of Brand Name and Generic Medications and Total Prescription Cost Among Medicare Beneficiaries With Epilepsy. Neurology 2022; 99:e751-e761. [PMID: 35705496 PMCID: PMC9484734 DOI: 10.1212/wnl.0000000000200779] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 04/11/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVE To characterize trends in antiseizure medication (ASM) fills and total prescription costs in people with epilepsy. METHODS This was a retrospective cohort study of beneficiaries with epilepsy (ASM, plus ICD codes) in a 20% random Medicare sample, with continuous Fee-For-Service coverage (Parts A, B, and D) in 2008-2018. We summed the number of pill days and costs (adjusted to 2018 dollars) per person-year for each ASM. ASMs were categorized into brand vs generic, first vs newer generation, and enzyme inducers vs noninducers. RESULTS There were 77,000-133,000 beneficiaries with epilepsy per year. The most common ASM was phenytoin in 2008, which shifted to levetiracetam in 2018 (2008: phenytoin 25%, levetiracetam 14%; 2018: phenytoin 9%, levetiracetam 27%). Brand name (2008: 56%; 2018: 14%), first-generation (2008: 55%; 2018: 32%), and enzyme-inducing ASMs (2008: 44%; 2018: 24%) each decreased over time as a proportion of pill days. The number of brand pill days per person-year initially decreased (e.g., 2008: 250; 2009: 121; 2010: 96) but then plateaued (2013-2018: between 66 and 69) given a notable increase in lacosamide pill days per person (2008: 0; 2018: 20). Total brand name costs per year initially decreased 2008-2010 (2008: $150 million; 2010: $72 million) but then increased after 2010 (2018: $256 million). In 2018, brand name ASMs represented 79% of costs despite representing only 14% of pill days, a 1-year pill supply became 277% more expensive for brand name medications but 42% less expensive for generic medications over time (2008: brand ∼$2,800 vs generic ∼$800; 2018: brand ∼$10,700 vs generic ∼$460), and many common brand name ASMs cost approximately 10-fold more per pill day than their generic equivalents. DISCUSSION First-generation and enzyme-inducing ASMs waned from 2008 to 2018. Although brand name ASMs initially waned translating into lower costs and potentially higher value care, after 2010, brand name costs markedly increased because of increasing use of lacosamide plus a 277% increase in per-pill cost of brand name ASMs. Brand name ASMs represented a minority of prescriptions, but the majority of costs.
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Affiliation(s)
- Samuel W Terman
- From the Department of Neurology, University of Michigan, Ann Arbor, MI.
| | - Chun C Lin
- From the Department of Neurology, University of Michigan, Ann Arbor, MI
| | - Wesley T Kerr
- From the Department of Neurology, University of Michigan, Ann Arbor, MI
| | - Lindsey B DeLott
- From the Department of Neurology, University of Michigan, Ann Arbor, MI
| | - Brian C Callaghan
- From the Department of Neurology, University of Michigan, Ann Arbor, MI
| | - James F Burke
- From the Department of Neurology, University of Michigan, Ann Arbor, MI
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4
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Raziullah, Kumar M, Ahmad A, Dutta HS, Rastogi A, Gangwar MK, Koley D. Ru-Catalyzed C-H alkenylation on the arene ring of pirfenidone using pyridone as a directing group. Chem Commun (Camb) 2022; 58:3481-3484. [PMID: 35191453 DOI: 10.1039/d2cc00257d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A method to functionalize the arene ring of pirfenidone has been demonstrated using pyridone as a directing group. Unlike the functionalization of the pyridone nucleus, the method demonstrated here is the alkenylation of the N-aryl ring of pirfenidone with internal alkynes using ruthenium catalyst. High functional group tolerance, simple reaction conditions and site-selective functionalization permit the synthesis of new analogues of drugs in a step-economical manner. The data of the control experiments suggest the possibilities of a base-assisted internal electrophilic substitution (BIES) pathway.
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Affiliation(s)
- Raziullah
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India.
| | - Mohit Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Ashfaq Ahmad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India.
| | - Himangsu Sekhar Dutta
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Anushka Rastogi
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Manoj Kumar Gangwar
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal-23955-6900, Kingdom of Saudi Arabia
| | - Dipankar Koley
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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5
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Meirinho S, Rodrigues M, Fortuna A, Falcão A, Alves G. Liquid chromatographic methods for determination of the new antiepileptic drugs stiripentol, retigabine, rufinamide and perampanel: A comprehensive and critical review. J Pharm Anal 2021; 11:405-421. [PMID: 34513117 PMCID: PMC8424363 DOI: 10.1016/j.jpha.2020.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 10/26/2020] [Accepted: 11/17/2020] [Indexed: 01/28/2023] Open
Abstract
The new antiepileptic drugs perampanel, retigabine, rufinamide and stiripentol have been recently approved for different epilepsy types. Being them an innovation in the antiepileptics armamentarium, a lot of investigations regarding their pharmacological properties are yet to be performed. Besides, considering their broad anticonvulsant activities, an extension of their therapeutic indications may be worthy of investigation, especially regarding other seizure types as well as other central nervous system disorders. Although different liquid chromatographic (LC) methods coupled with ultraviolet, fluorescence, mass or tandem-mass spectrometry detection have already been developed for the determination of perampanel, retigabine, rufinamide and stiripentol, new and more cost-effective methods are yet required. Therefore, this review summarizes the main analytical aspects regarding the liquid chromatographic methods developed for the analysis of perampanel, retigabine (and its main active metabolite), rufinamide and stiripentol in biological samples and pharmaceutical dosage forms. Furthermore, the physicochemical and stability properties of the target compounds will also be addressed. Thus, this review gathers, for the first time, important background information on LC methods that have been developed and applied for the determination of perampanel, retigabine, rufinamide and stiripentol, which should be considered as a starting point if new (bio)analytical techniques are aimed to be implemented for these drugs.
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Affiliation(s)
- Sara Meirinho
- Faculty of Health Sciences, Health Sciences Research Center, University of Beira Interior (CICS UBI), 6200-506, Covilhã, Portugal
| | - Márcio Rodrigues
- Faculty of Health Sciences, Health Sciences Research Center, University of Beira Interior (CICS UBI), 6200-506, Covilhã, Portugal
- Research Unit for Inland Development, Polytechnic Institute of Guarda (UDI-IPG), 6300-654, Guarda, Portugal
| | - Ana Fortuna
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, 3000-548, Coimbra, Portugal
- Laboratory of Pharmacology, Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Amílcar Falcão
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, 3000-548, Coimbra, Portugal
- Laboratory of Pharmacology, Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Gilberto Alves
- Faculty of Health Sciences, Health Sciences Research Center, University of Beira Interior (CICS UBI), 6200-506, Covilhã, Portugal
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Kiernan MC, Vucic S, Talbot K, McDermott CJ, Hardiman O, Shefner JM, Al-Chalabi A, Huynh W, Cudkowicz M, Talman P, Van den Berg LH, Dharmadasa T, Wicks P, Reilly C, Turner MR. Improving clinical trial outcomes in amyotrophic lateral sclerosis. Nat Rev Neurol 2021; 17:104-118. [PMID: 33340024 PMCID: PMC7747476 DOI: 10.1038/s41582-020-00434-z] [Citation(s) in RCA: 127] [Impact Index Per Article: 42.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/05/2020] [Indexed: 12/11/2022]
Abstract
Individuals who are diagnosed with amyotrophic lateral sclerosis (ALS) today face the same historically intransigent problem that has existed since the initial description of the disease in the 1860s - a lack of effective therapies. In part, the development of new treatments has been hampered by an imperfect understanding of the biological processes that trigger ALS and promote disease progression. Advances in our understanding of these biological processes, including the causative genetic mutations, and of the influence of environmental factors have deepened our appreciation of disease pathophysiology. The consequent identification of pathogenic targets means that the introduction of effective therapies is becoming a realistic prospect. Progress in precision medicine, including genetically targeted therapies, will undoubtedly change the natural history of ALS. The evolution of clinical trial designs combined with improved methods for patient stratification will facilitate the translation of novel therapies into the clinic. In addition, the refinement of emerging biomarkers of therapeutic benefits is critical to the streamlining of care for individuals. In this Review, we synthesize these developments in ALS and discuss the further developments and refinements needed to accelerate the introduction of effective therapeutic approaches.
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Affiliation(s)
- Matthew C Kiernan
- Brain and Mind Centre, University of Sydney, Sydney, New South Wales, Australia.
- Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.
| | - Steve Vucic
- Sydney Medical School Westmead, University of Sydney, Sydney, New South Wales, Australia
| | - Kevin Talbot
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Christopher J McDermott
- Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
- NIHR Sheffield Biomedical Research Centre, Sheffield, UK
| | - Orla Hardiman
- Academic Neurology Unit, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- National Neuroscience Centre, Beaumont Hospital, Dublin, Ireland
| | - Jeremy M Shefner
- Department of Neurology, Barrow Neurological Institute, University of Arizona College of Medicine Phoenix, Creighton University, Phoenix, AZ, USA
| | - Ammar Al-Chalabi
- King's College London, Maurice Wohl Clinical Neuroscience Institute, Department of Basic and Clinical Neuroscience, London, UK
| | - William Huynh
- Brain and Mind Centre, University of Sydney, Sydney, New South Wales, Australia
- Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Merit Cudkowicz
- Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Paul Talman
- Neurosciences Department, Barwon Health District, Melbourne, Victoria, Australia
| | - Leonard H Van den Berg
- Department of Neurology, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, Netherlands
| | - Thanuja Dharmadasa
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Paul Wicks
- Wicks Digital Health, Lichfield, United Kingdom
| | - Claire Reilly
- The Motor Neurone Disease Association of New Zealand, Auckland, New Zealand
| | - Martin R Turner
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
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Molecular basis and restoration of function deficiencies of Kv7.4 variants associated with inherited hearing loss. Hear Res 2020; 388:107884. [PMID: 31995783 DOI: 10.1016/j.heares.2020.107884] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 12/12/2019] [Accepted: 12/31/2019] [Indexed: 11/20/2022]
Abstract
Deafness non-syndromic autosomal dominant 2 (DFNA2) is characterized by symmetric, predominantly high-frequency sensorineural hearing loss that is progressive across all frequencies. The disease is associated with variants of a potassium voltage-gated channel subfamily Q member 4 gene, KCNQ4 (Kv7.4). Here, we studied nine recently identified Kv7.4 variants in DFNA2 pedigrees, including V230E, E260K, D262V, Y270H, W275R, G287R, P291L, P291S and S680F. We proved that the variant S680F did not alter the channel function while the other eight variants resulted in function deficiencies. We further proved that the two variants E260K and P291S showed reduced cell membrane expressions while the other seven variants showed moderate cell surface expressions. Thus, trafficking deficiency is not a common mechanism underlying channel dysfunction. Next, we studied two variants, V230E and G287R, using molecular dynamics simulation. We showed that V230E stabilized Kv7.4 channel in the closed state by forming an additional hydrogen bond with a basic residue K325, while G287R distorted the selectivity filter and blocked the pore region of Kv7.4 channel. Moreover, by co-expressing wild-type (WT) and variant proteins in vitro, we demonstrated that the heterogeneous Kv7.4 channel currents were reduced compared to the WT channel currents and the reduction could be rescued by a Kv7.4 opener retigabine. Our study provided the underlying mechanisms and suggested a potential alternative therapeutic approach for DFNA2.
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8
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Hwang SK, Lee YJ, Nam SO, Kim WS, Kim JS, Kim SJ, Lee YJ, Kwon S. Real-Life Effectiveness and Tolerability of Perampanel in Pediatric Patients Aged 4 Years or Older with Epilepsy: A Korean National Multicenter Study. J Clin Neurol 2020; 16:53-59. [PMID: 31942758 PMCID: PMC6974830 DOI: 10.3988/jcn.2020.16.1.53] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 08/27/2019] [Accepted: 08/27/2019] [Indexed: 12/25/2022] Open
Abstract
Background and Purpose The US Food and Drug Administration approval for perampanel has only recently been expanded to patients as young as 4 years, and so there have been few real-life studies of the effects of perampanel in pediatric patients. The aim of this study was to determine the long-term efficacy, factors affecting treatment response, and tolerability of perampanel as an add-on therapy in pediatric patients aged 4 years or older with epilepsy. Methods This multicenter retrospective observational study collected data from pediatric epilepsy centers of four Korean national universities. Changes in the seizure frequency from baseline, adverse events, and retention rates were obtained at 3, 6, and 12 months. Adverse events and discontinuation profiles were obtained to assess tolerability. Results This study included 220 children and adolescents (117 males and 103 females) aged 4 to 20 years. The overall response rate was 43.6%, and the seizure-freedom rate was 17.7%. Factors affecting a good treatment response were the absence of intellectual disability, small number of concomitant antiepileptic drugs, and low baseline seizure frequency. Eighty-eight patients (40%) experienced adverse events, but they mostly were of mild severity and resolved after the dose reduction or discontinuation of perampanel. The retention rates at 3, 6, and 12 months were 85.0%, 71.8%, and 50.5%, respectively. Conclusions Adjunctive treatment with perampanel was efficacious and tolerated in pediatric patients aged 4 years or older with epilepsy. Early perampanel treatment may help to reduce the burden of their seizures and improve their quality of life.
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Affiliation(s)
- Su Kyeong Hwang
- Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Yun Jin Lee
- Department of Pediatrics, Pusan National University Children's Hospital, Pusan National University School of Medicine, Yangsan, Korea.,Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Sang Ook Nam
- Department of Pediatrics, Pusan National University Children's Hospital, Pusan National University School of Medicine, Yangsan, Korea.,Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Won Seop Kim
- Department of Pediatrics, College of Medicine, Chungbuk National University, Cheongju, Korea
| | - Jon Soo Kim
- Department of Pediatrics, College of Medicine, Chungbuk National University, Cheongju, Korea
| | - Sun Jun Kim
- Department of Pediatrics, Chonbuk National University Medical School, Jeonju, Korea
| | - Yun Jeong Lee
- Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Soonhak Kwon
- Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea.
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9
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Mitta N, Rajiv KR, Baishya J, Chandran A, Menon R, Thomas SV, Radhakrishnan A. How safe is bone health in patients on newer or enzyme inhibitor antiepileptic drugs? J Neurol Sci 2019; 405:116422. [PMID: 31415951 DOI: 10.1016/j.jns.2019.116422] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 07/10/2019] [Accepted: 08/06/2019] [Indexed: 01/10/2023]
Abstract
BACKGROUND Data on the effect of enzyme inhibitors and newer anti-epileptic drugs (AEDs) on bone health is limited with conflicting results. AIM We compared the effects on bone health of patients exposed to enzyme inducer versus enzyme inhibitor AEDs and newer versus older AEDs. METHODS We prospectively studied 51 patients on AEDs for more than two years and equal age and sex matched controls from March 2017 to September 2018. Biochemical bone mineral markers and bone mineral density (BMD) were measured and analysed between patients versus controls and between various sub-groups based on enzymatic effect, generation and number of AEDs. RESULTS Of 51 patients,11(21.5%) had osteopenia and 3(5.9%) had osteoporosis. T-score (-0.75 ± 1.22 versus 0.004 ± 1.0, p < .001) and Z-score at femur neck (-0.38 ± 1.08 versus0.002 ± 0.81, p < .001) were found to be significantly lower in patients compared to controls. Relative risk for low BMD was higher in patients on polytherapy compared to monotherapy (RR = 1.37,CI = 0.69-2.74).Higher relative risk for low BMD was noted with; clobazam (RR = 1.51,CI = 0.82-2.78), oxcarbazepine (RR = 1.33,CI = 0.68-2.59), phenobarbitone (RR = 1.31,CI = 0.26-6.7) and leviteracetam (RR = 1.18,CI = 0.45-3.06) mono or polytherapy and valproate monotherapy (RR = 3.5,CI = 1.09-11.29). No significant difference was noted with regards to mean dosage or metabolic or radiological markers of bone health between patients on enzyme inducer versus inhibitors and newer versus older AEDs. A significant negative correlation was found between cumulative drug load and femur T-score (r2 = -0.27, p = .04). CONCLUSION Bone health in epilepsy is adversely affected by chronic exposure to AEDs; irrespective of the enzymatic effect or generation of AEDs. Complex pharmacodynamic mechanisms of AEDs as well as pharmacokinetic interactions between various AED polytherapies affects bone health.
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Affiliation(s)
- Nandini Mitta
- R.Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree ChitraTirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Keni Ravish Rajiv
- R.Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree ChitraTirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Jitupam Baishya
- R.Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree ChitraTirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Anuvitha Chandran
- R.Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree ChitraTirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Ramshekhar Menon
- R.Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree ChitraTirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Sanjeev V Thomas
- R.Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree ChitraTirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Ashalatha Radhakrishnan
- R.Madhavan Nayar Centre for Comprehensive Epilepsy Care, Department of Neurology, Sree ChitraTirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India.
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de Biase S, Nilo A, Bernardini A, Gigli GL, Valente M, Merlino G. Timing use of novel anti-epileptic drugs: is earlier better? Expert Rev Neurother 2019; 19:945-954. [DOI: 10.1080/14737175.2019.1636649] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Stefano de Biase
- Neurology Unit, Department of Neurosciences, University Hospital of Udine, Udine, Italy
| | - Annacarmen Nilo
- Neurology Unit, Department of Neurosciences, University Hospital of Udine, Udine, Italy
| | - Andrea Bernardini
- Neurology Unit, Department of Neurosciences, University Hospital of Udine, Udine, Italy
| | - Gian Luigi Gigli
- Neurology Unit, Department of Neurosciences, University Hospital of Udine, Udine, Italy
- DMIF, University of Udine, Udine, Italy
| | - Mariarosaria Valente
- Neurology Unit, Department of Neurosciences, University Hospital of Udine, Udine, Italy
- Department of Medicine, University of Udine Medical School, Udine, Italy
| | - Giovanni Merlino
- Stroke Unit, Department of Neurosciences, University Hospital of Udine, Udine, Italy
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11
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Verrotti A, Iapadre G, Di Donato G, Di Francesco L, Zagaroli L, Matricardi S, Belcastro V, Iezzi ML. Pharmacokinetic considerations for anti-epileptic drugs in children. Expert Opin Drug Metab Toxicol 2019; 15:199-211. [PMID: 30689454 DOI: 10.1080/17425255.2019.1575361] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Epilepsy is a chronic and debilitating neurological disease, with a peak of incidence in the first years of life. Today, the vast armamentarium of antiepileptic drugs (AEDs) available make even more challenging to select the most appropriate AED and establish the most effective dosing regimen. In fact, AEDs pharmacokinetics is under the influence of important age-related factors which cannot be ignored. Areas covered: Physiological changes occurring during development age (different body composition, immature metabolic patterns, reduced renal activity) can significantly modify the pharmacokinetic profile of AEDs (adsorption, volume of distribution, half-life, clearance), leading to an altered treatment response. We reviewed the main pharmacokinetic characteristics of AEDs used in children, focusing on age-related factors which are of relevance when treating this patient population. Expert opinion: To deal with this pharmacokinetic variability, physicians have at their disposal two tools: 1) therapeutic drug concentration monitoring, which may help to set the optimal therapeutic regimen for each patient and to monitor eventual fluctuation, and 2) the use of extended-release drug formulations, when available. In the next future, the development of 'ad-hoc' electronic dashboard systems will represent relevant decision-support tools making the AED therapy even more individualized and precise, especially in children.
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Affiliation(s)
- Alberto Verrotti
- a Department of Pediatrics , University of L'Aquila , L'Aquila , Italy
| | - Giulia Iapadre
- a Department of Pediatrics , University of L'Aquila , L'Aquila , Italy
| | - Giulia Di Donato
- a Department of Pediatrics , University of L'Aquila , L'Aquila , Italy
| | | | - Luca Zagaroli
- a Department of Pediatrics , University of L'Aquila , L'Aquila , Italy
| | - Sara Matricardi
- b Child Neurology and Psychiatry Unit , Children's Hospital G. Salesi , Ancona , Italy
| | | | - Maria Laura Iezzi
- a Department of Pediatrics , University of L'Aquila , L'Aquila , Italy
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12
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Yun Y, Kim D, Lee YJ, Kwon S, Hwang SK. Efficacy and tolerability of adjunctive perampanel treatment in children under 12 years of age with refractory epilepsy. KOREAN JOURNAL OF PEDIATRICS 2018; 62:269-273. [PMID: 30590000 PMCID: PMC6642925 DOI: 10.3345/kjp.2018.06863] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 12/26/2018] [Indexed: 02/08/2023]
Abstract
Purpose There is limited data on the use of perampanel in children under 12 years of age. We evaluated the efficacy and tolerability of adjunctive perampanel treatment in children under 12 years of age with refractory epilepsy. Methods This retrospective observational study was performed in Kyungpook National University Hospital from July 2016 to March 2018. A responder was defined as a patient with ≥50% reduction in monthly seizure frequency compared with the baseline. Adverse events and discontinuation data were obtained to evaluate tolerability. Results Twenty-two patients (8 males, 14 females) aged 3.1–11.4 years (mean, 8.0±2.5 years) were included in this study. After an average of 9.2 months (range, 0.5–19 months) of follow-up, 15 patients (68%) showed a reduction in seizure frequency, including 5 patients (23%) with seizure freedom. The age at epilepsy onset was significantly lower (P=0.048), and the duration of epilepsy was significantly longer (P=0.019) in responders than in nonresponders. Nine patients (41%) experienced adverse events, including somnolence (23%), respiratory depression (9%), violence (4.5%), and seizure aggravation (4.5%). The most serious adverse event was respiratory depression, which required mechanical ventilation in 2 patients (9%). Eight patients (36%) discontinued perampanel due to lack of efficacy or adverse events. Three out of 4 patients (75%) who discontinued perampanel due to adverse events had an underlying medical condition. Conclusion Perampanel offers a treatment option for refractory epilepsy in children. Adjunctive treatment with perampanel requires special consideration in those with underlying medical conditions to prevent serious adverse events.
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Affiliation(s)
- Yuni Yun
- Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu , Korea
| | - Dongsub Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yun-Jeong Lee
- Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu , Korea
| | - Soonhak Kwon
- Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu , Korea
| | - Su-Kyeong Hwang
- Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu , Korea
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Tyrlikova I, Brazdil M, Rektor I, Tyrlik M. Perampanel as monotherapy and adjunctive therapy for focal onset seizures, focal to bilateral tonic-clonic seizures and as adjunctive therapy of generalized onset tonic-clonic seizures. Expert Rev Neurother 2018; 19:5-16. [DOI: 10.1080/14737175.2019.1555474] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Ivana Tyrlikova
- Mid-Atlantic Epilepsy and Sleep Center, Bethesda, MD, USA
- Brno Epilepsy Center, 1st Department of Neurology, St. Anne’s Univ. Hospital and Medical Faculty of Masaryk University, Brno, Czech Republic
| | - Milan Brazdil
- Brno Epilepsy Center, 1st Department of Neurology, St. Anne’s Univ. Hospital and Medical Faculty of Masaryk University, Brno, Czech Republic
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Ivan Rektor
- Brno Epilepsy Center, 1st Department of Neurology, St. Anne’s Univ. Hospital and Medical Faculty of Masaryk University, Brno, Czech Republic
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Michal Tyrlik
- Mid-Atlantic Epilepsy and Sleep Center, Bethesda, MD, USA
- University of Maryland, College Park, USA
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Mechanisms Underlying Aggressive Behavior Induced by Antiepileptic Drugs: Focus on Topiramate, Levetiracetam, and Perampanel. Behav Neurol 2018; 2018:2064027. [PMID: 30581496 PMCID: PMC6276511 DOI: 10.1155/2018/2064027] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 10/30/2018] [Indexed: 12/28/2022] Open
Abstract
Antiepileptic drugs (AEDs) are effective against seizures, but their use is often limited by adverse effects, among them psychiatric and behavioral ones including aggressive behavior (AB). Knowledge of the incidence, risk factors, and the underlying mechanisms of AB induced by AEDs may help to facilitate management and reduce the risk of such side effects. The exact incidence of AB as an adverse effect of AEDs is difficult to estimate, but frequencies up to 16% have been reported. Primarily, levetiracetam (LEV), perampanel (PER), and topiramate (TPM), which have diverse mechanisms of action, have been associated with AB. Currently, there is no evidence for a specific pharmacological mechanism solely explaining the increased incidence of AB with LEV, PER, and TPM. Serotonin (5-HT) and GABA, and particularly glutamate (via the AMPA receptor), seem to play key roles. Other mechanisms involve hormones, epigenetics, and “alternative psychosis” and related phenomena. Increased individual susceptibility due to an underlying neurological and/or a mental health disorder may further explain why people with epilepsy are at an increased risk of AB when using AEDs. Remarkably, AB may occur with a delay of weeks or months after start of treatment. Information to patients, relatives, and caregivers, as well as sufficient clinical follow-up, is crucial, and there is a need for further research to understand the complex relationship between AED mechanisms of action and the induction/worsening of AB.
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Martinez A, Palomo Ruiz MDV, Perez DI, Gil C. Drugs in clinical development for the treatment of amyotrophic lateral sclerosis. Expert Opin Investig Drugs 2017; 26:403-414. [PMID: 28277881 DOI: 10.1080/13543784.2017.1302426] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Amyotrophic Lateral Sclerosis (ALS) is a fatal motor neuron progressive disorder for which no treatment exists to date. However, there are other investigational drugs and therapies currently under clinical development may offer hope in the near future. Areas covered: We have reviewed all the ALS ongoing clinical trials (until November 2016) and collected in Clinicaltrials.gov or EudraCT. We have described them in a comprehensive way and have grouped them in the following sections: biomarkers, biological therapies, cell therapy, drug repurposing and new drugs. Expert opinion: Despite multiple obstacles that explain the absence of effective drugs for the treatment of ALS, joint efforts among patient's associations, public and private sectors have fueled innovative research in this field, resulting in several compounds that are in the late stages of clinical trials. Drug repositioning is also playing an important role, having achieved the approval of some orphan drug applications, in late phases of clinical development. Endaravone has been recently approved in Japan and is pending in USA.
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Affiliation(s)
- Ana Martinez
- a IPSBB Unit , Centro de Investigaciones Biologicas-CSIC , Madrid , Spain
| | | | - Daniel I Perez
- a IPSBB Unit , Centro de Investigaciones Biologicas-CSIC , Madrid , Spain
| | - Carmen Gil
- a IPSBB Unit , Centro de Investigaciones Biologicas-CSIC , Madrid , Spain
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