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Li J, Zhang S, Chen R. Pharmacokinetics and multi-peak phenomenon analysis of novel anti-Parkinson's drug FLZ after multi-dose in cynomolgus monkeys. Xenobiotica 2024; 54:201-210. [PMID: 38563808 DOI: 10.1080/00498254.2024.2326475] [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: 01/17/2024] [Accepted: 02/29/2024] [Indexed: 04/04/2024]
Abstract
The novel anti-Parkinson disease drug, FLZ, had a complicated drug absorption and metabolise process reported in single-dose studies. A multi-peak absorption peak phenomenon was found.This study focused on the multi-dose pharmacokinetics (PK) characteristics of FLZ, T1, and T2 in cynomolgus monkeys and raised discussion on its multi-peak absorption situation. Different doses of FLZ ranging from 75 to 300 mg/kg were administered orally to 16 cynomolgus monkeys. The whole treatment period lasted for 42 days with FLZ once a day.The primary metabolites of FLZ were Target1 (T1) and Target2 (T2), which had plasma exposure (calculated as AUC0-24, day 42) approximately 2 and 10 times higher than the parent drug. The proportion of plasma exposure increase was lower than the proportion of dose increase in FLZ, T1, and T2.Gender influenced its exposure (AUC0-24) with approximately 3-fold higher in males than females. There was no significant accumulation of T1 and T2. Enterohepatic Circulation (EHC) and gastrointestinal (GI) tract absorption may be involved in the mechanism of multi-peak characteristics.
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Affiliation(s)
- Jiayu Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Shuofeng Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Rui Chen
- Clinical Pharmacology Research Centre, Peking Union Medical College Hospital, State Key Laboratory of Complex Severe and Rare Diseases, NMPA Key Laboratory for Clinical Research and Evaluation of Drug, Beijing Key Laboratory of Clinical PK and PD Investigation for Innovative Drugs, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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2
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Jing S, Yuan Y, Leuratti C, Vaja V, Cattaneo C. Pharmacokinetic and Safety Study of Single and Multiple Oral Doses of Safinamide in Healthy Chinese Volunteers. Clin Pharmacol Drug Dev 2023; 12:1104-1113. [PMID: 37293981 DOI: 10.1002/cpdd.1277] [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: 03/14/2023] [Accepted: 05/08/2023] [Indexed: 06/10/2023]
Abstract
This randomized, parallel-group study evaluated the plasma pharmacokinetic profile of safinamide in 24 healthy Chinese men and women, randomly assigned to receive 50 or 100 mg of safinamide as a single dose, followed, after a 7-day washout, by multiple doses once daily for 7 days. Plasma safinamide was determined up to 96 h after the first single dose (day 1) and the last multiple dose (day 14), and up to 24 h after the first multiple dose (day 8). Following single- and multiple-dose administration, peak concentrations were achieved at a median time of 1.5-2 h. Plasma exposure increased in a dose-proportional manner. After single dose, mean half-life was 23-24 h. Area under the concentration-time curve (AUC) from time zero extrapolated to infinity was only slightly higher than AUC from time zero to the last quantifiable concentration, corresponding for the 2 parameters, respectively, to 12,380 and 11,560 ng • h/mL for the 50 mg and to 22,030 and 20,790 ng • h/mL for the 100-mg dose. AUC in the dosing interval at steady state was 13,150 and 23,100 ng • h/mL for 50 and 100 mg of safinamide. Steady state was reached in 6 days, accumulation was approximately twofold, and the pharmacokinetics were time independent. The plasma safinamide pharmacokinetic profile observed in this study is in line with the published results in both Chinese and non-Asian populations.
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Affiliation(s)
- Sun Jing
- Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yaozong Yuan
- Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Wang Y, Zhao GA, Li X, Zhang E, Tan W, Chen JQ. Establishment of a sensitive UPLC-MS/MS method to quantify safinamide in rat plasma. Front Pharmacol 2023; 14:1211383. [PMID: 37701033 PMCID: PMC10493267 DOI: 10.3389/fphar.2023.1211383] [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: 04/24/2023] [Accepted: 08/03/2023] [Indexed: 09/14/2023] Open
Abstract
A fast, simple, and sensitive ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method was established for the quantification of safinamide in rat plasma. Plasma samples were treated with acetonitrile for protein precipitation, and diazepam was used as an internal standard (IS). The analytes were separated on an Acquity UPLC C18 (2.1 mm × 50 mm, 1.7 μm) chromatographic column with gradient elution using a mobile phase (0.1% formic acid-acetonitrile). Then, the eluates were detected by electrospray ionization (ESI) in positive ion mode. The analytes were quantified by multiple reaction monitoring (MRM) using the transition m/z 303.3→215.0 of safinamide and m/z 285.0→154.0 of IS. Safinamide had good linearity in the concentration range of 1.0-2000 ng/mL, and the lower limit of quantitation (LLOQ) was 1.0 ng/mL. The intra- and inter-day precision and accuracy of safinamide were less than 7.63%, while the average recovery rate was 92.98%-100.29%. The method was validated to be stable and had low noise, short chromatographic run time, wide linear range, small sample volumes, low sample injection volumes, and high sensitivity. Therefore, it can be used in pharmacokinetics and preclinical and clinical studies.
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Affiliation(s)
- Ying Wang
- Department of Pharmacy, The Affiliated Lihuili Hospital, Ningbo University, Ningbo, Zhejiang, China
| | - Guan-An Zhao
- Urinary Surgery, The People’s Hospital of Lishui, Lishui, Zhejiang, China
| | - Xia Li
- Clinical Laboratory, The Affiliated Lihuili Hospital, Ningbo University, Ningbo, Zhejiang, China
| | - En Zhang
- Clinical Laboratory, The Affiliated Lihuili Hospital, Ningbo University, Ningbo, Zhejiang, China
| | - Wei Tan
- The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, China
| | - Jia-qi Chen
- Clinical Lab, The People’s Hospital of Lishui, Lishui, Zhejiang, China
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Ayuso P, Jiménez-Jiménez FJ, Gómez-Tabales J, Alonso-Navarro H, García-Martín E, Agúndez JAG. An update on the pharmacogenetic considerations when prescribing dopamine receptor agonists for Parkinson's disease. Expert Opin Drug Metab Toxicol 2023; 19:447-460. [PMID: 37599424 DOI: 10.1080/17425255.2023.2249404] [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: 05/02/2023] [Revised: 07/31/2023] [Accepted: 08/15/2023] [Indexed: 08/22/2023]
Abstract
INTRODUCTION Parkinson's disease is a chronic neurodegenerative multisystemic disorder that affects approximately 2% of the population over 65 years old. This disorder is characterized by motor symptoms which are frequently accompanied by non-motor symptoms such as cognitive disorders. Current drug therapies aim to reduce the symptoms and increase the patient's life expectancy. Nevertheless, there is heterogeneity in therapy response in terms of efficacy and adverse effects. This wide range in response may be linked to genetic variability. Thus, it has been suggested that pharmacogenomics may help to tailor and personalize drug therapy for Parkinson's disease. AREAS COVERED This review describes and updates the clinical impact of genetic factors associated with the efficacy and adverse drug reactions related to common medications used to treat Parkinson's disease. Additionally, we highlight current informative recommendations for the drug treatment of Parkinson's disease. EXPERT OPINION The pharmacokinetic, pharmacodynamic, and safety profiles of Parkinson's disease drugs do not favor the development of pharmacogenetic tests with a high probability of success. The chances of obtaining ground-breaking pharmacogenetics biomarkers for Parkinson's disease therapy are limited. Nevertheless, additional information on the metabolism of certain drugs, and an analysis of the potential of pharmacogenetics in novel drugs could be of interest.
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Affiliation(s)
- Pedro Ayuso
- Universidad de Extremadura, University Institute of Molecular Pathology Biomarkers, Cáceres, Spain
| | | | - Javier Gómez-Tabales
- Universidad de Extremadura, University Institute of Molecular Pathology Biomarkers, Cáceres, Spain
| | | | - Elena García-Martín
- Universidad de Extremadura, University Institute of Molecular Pathology Biomarkers, Cáceres, Spain
| | - José A G Agúndez
- Universidad de Extremadura, University Institute of Molecular Pathology Biomarkers, Cáceres, Spain
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Li X, Wen J, Liu Y, Xu B, Li Y, Li Y, Zhang P, Li X. Pharmacokinetics and Bioequivalence of 2 Safinamide Tablets in Healthy Chinese Volunteers Under Fasting and Fed Conditions. Clin Pharmacol Drug Dev 2023; 12:70-76. [PMID: 36057952 DOI: 10.1002/cpdd.1157] [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: 06/11/2022] [Accepted: 07/26/2022] [Indexed: 01/06/2023]
Abstract
To assess the bioequivalence of a generic safinamide tablet (test) vs a brand-name safinamide tablet (reference) and effects of food on the pharmacokinetics of safinamide in healthy Chinese subjects, a single-center, single-dose, randomized, open-label, 2-preparation, 2-period study with a 15-day washout period was undertaken. A total of 56 healthy subjects were recruited in this study (fasting, n = 28; fed, n = 28). A single dose of a 100-mg test or reference safinamide tablet was administered to each subject in a randomized sequence. Blood samples were obtained at 5 minutes before drug administration and during the 120 hours after dosing. The safinamide concentration in plasma was determined by high-performance liquid chromatography-tandem mass spectrometry. Pharmacokinetic parameters were analyzed with noncompartmental methods. Safety was also monitored. The major pharmacokinetic parameters including maximum plasma drug concentration, area under plasma concentration-time curve (AUC) from zero to time t (AUC0-t ), and AUC from time 0 to infinity (AUC0-∞ ) were similar between the test and reference tablets under fasting and fed conditions. The 90% CIs of the test/reference ratios of log-transformed maximum plasma drug concentration, AUC from zero to time t, and AUC from time 0 to infinity all fell within the equivalence interval (80.0%-125%) whether under fasting condition or fed condition. In conclusion, the 2 formulations of safinamide tablets were bioequivalent and well tolerated under both fasting and fed conditions in healthy Chinese volunteers. High-fat food delayed the absorption of safinamide but did not affect the final bioavailability.
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Affiliation(s)
- Xin Li
- Department of Pharmacy, The Third Hospital of Changsha, Changsha, Hunan, People's Republic of China
| | - Jing Wen
- Department of Pharmacy, The Third Hospital of Changsha, Changsha, Hunan, People's Republic of China
| | - Yujie Liu
- Nanjing Chia Tai Tianqing Pharmaceutical Co., Ltd., Nanjing, Jiangsu, People's Republic of China
| | - Bing Xu
- Department of Pharmacy, The Third Hospital of Changsha, Changsha, Hunan, People's Republic of China
| | - Yuan Li
- Department of Pharmacy, The Third Hospital of Changsha, Changsha, Hunan, People's Republic of China
| | - You Li
- Department of Pharmacy, The Third Hospital of Changsha, Changsha, Hunan, People's Republic of China
| | - Ping Zhang
- Department of Pharmacy, The Third Hospital of Changsha, Changsha, Hunan, People's Republic of China
| | - Xianjing Li
- Nanjing Clinical Tech Laboratories Inc., Nanjing, Jiangsu, People's Republic of China
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Sudevan ST, Oh JM, Abdelgawad MA, Abourehab MAS, Rangarajan TM, Kumar S, Ahmad I, Patel H, Kim H, Mathew B. Introduction of benzyloxy pharmacophore into aryl/heteroaryl chalcone motifs as a new class of monoamine oxidase B inhibitors. Sci Rep 2022; 12:22404. [PMID: 36575270 PMCID: PMC9794710 DOI: 10.1038/s41598-022-26929-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022] Open
Abstract
The inhibitory action of fifteen benzyloxy ortho/para-substituted chalcones (B1-B15) was evaluated against human monoamine oxidases (hMAOs). All the molecules inhibited hMAO-B isoform more potently than hMAO-A. Furthermore, the majority of the molecules showed strong inhibitory actions against hMAO-B at 10 μM level with residual activities of less than 50%. Compound B10 has an IC50 value of 0.067 μM, making it the most potent inhibitor of hMAO-B, trailed by compound B15 (IC50 = 0.12 μM). The thiophene substituent (B10) in the A-ring exhibited the strongest hMAO-B inhibition structurally, however, increased residue synthesis did not result in a rise in hMAO-B inhibition. In contrast, the benzyl group at the para position of the B-ring displayed more hMAO-B inhibition than the other positions. Compounds B10 and B15 had relatively high selectivity index (SI) values for hMAO-B (504.791 and 287.600, respectively). Ki values of B10 and B15 were 0.030 ± 0.001 and 0.033 ± 0.001 μM, respectively. The reversibility study showed that B10 and B15 were reversible inhibitors of hMAO-B. PAMPA assay manifested that the benzyloxy chalcones (B10 and B15) had a significant permeability and CNS bioavailability with Pe value higher than 4.0 × 10-6 cm/s. Both compounds were stabilized in protein-ligand complexes by the π-π stacking, which enabled them to bind to the hMAO-B enzyme's active site incredibly effectively. The hMAO-B was stabilized by B10- and B15-hMAO-B complexes, with binding energies of - 74.57 and - 87.72 kcal/mol, respectively. Using a genetic algorithm and multiple linear regression, the QSAR model was created. Based on the best 2D and 3D descriptor-based QSAR model, the following statistics were displayed: R2 = 0.9125, Q2loo = 0.8347. These findings imply that B10 and B15 are effective, selective, and reversible hMAO-B inhibitors.
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Affiliation(s)
- Sachithra Thazhathuveedu Sudevan
- grid.411370.00000 0000 9081 2061Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Sciences Campus, Kochi, 682 041 India
| | - Jong Min Oh
- grid.412871.90000 0000 8543 5345Department of Pharmacy, and Research Institute of Life Pharmaceutical Sciences, Sunchon National University, Suncheon, 57922 Republic of Korea
| | - Mohamed A. Abdelgawad
- grid.440748.b0000 0004 1756 6705Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, 72341 Saudi Arabia ,grid.411662.60000 0004 0412 4932Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62514 Egypt
| | - Mohammed A. S. Abourehab
- grid.412832.e0000 0000 9137 6644Department of Pharmaceutics, College of Pharmacy, Umm Al-Qura University, Makkah, 21955 Saudi Arabia
| | - T. M. Rangarajan
- grid.8195.50000 0001 2109 4999Department of Chemistry, Sri Venketeswara College, University of Delhi, New Delhi, 110021 India
| | - Sunil Kumar
- grid.411370.00000 0000 9081 2061Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Sciences Campus, Kochi, 682 041 India
| | - Iqrar Ahmad
- Department of Pharmaceutical Chemistry, Prof. Ravindra Nikam College of Pharmacy, Gondur, Dhule, 424002 Maharashtra India
| | - Harun Patel
- grid.412233.50000 0001 0641 8393Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, 425405 Maharashtra India
| | - Hoon Kim
- grid.412871.90000 0000 8543 5345Department of Pharmacy, and Research Institute of Life Pharmaceutical Sciences, Sunchon National University, Suncheon, 57922 Republic of Korea
| | - Bijo Mathew
- grid.411370.00000 0000 9081 2061Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Sciences Campus, Kochi, 682 041 India
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Xu Y, Cen P, Ma L, Tian M, Zhang X, Zhang Q, Yu K, Zhang H, Gu W, He Q. Highly efficient radiosynthesis and biological evaluation of [18F]safinamide, a radiolabelled anti-parkinsonian drug for PET imaging. ChemMedChem 2022; 17:e202200472. [PMID: 36068922 DOI: 10.1002/cmdc.202200472] [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: 08/31/2022] [Indexed: 11/06/2022]
Abstract
As an add-on drug approved for Parkinson's disease treatment, safinamide has multiple functions, such as selective and reversible monoamine oxidase-B inhibition, voltage-sensitive sodium/potassium channel blockage, and glutamate release inhibition. Meanwhile, safinamide shows tremendous therapeutic potential in the context of other central nervous system diseases (e.g., ischaemic stroke, amyotrophic lateral sclerosis, depression, etc.). In this work, [18F]safinamide, which is safinamide labelled by the positron-emitting radionuclide [18F]fluorine, was synthesized automatically based on iodonium ylide precursors with high radiochemical yield and high molar activity. Density functional theory was applied to calculate the Gibbs free energy change during iodonium ylide-mediated fluorination and to interpret the effect of tetraethylammonium (TEA+) as the counter cation in these reactions to improve the nucleophilicity of [18F/19F]fluoride. In addition, positron emission tomography studies on Sprague Dawley rats were carried out to determine the imaging characteristics, pharmacokinetics, and metabolism of the [18F]safinamide radiotracer. The results displayed the complete biodistribution of the radiotracer, especially in rat brains, and revealed that [18F]safinamide has moderate brain uptake, rapid and reversible binding kinetics, and good stability.
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Affiliation(s)
- Yangyang Xu
- Zhejiang University, College of Chemical & Biological Engineering, CHINA
| | - Peili Cen
- Zhejiang University, Department of Nuclear Medicine and PET/CT Center, CHINA
| | - Lijuan Ma
- Zhejiang University, Department of Nuclear Medicine and PET/CT Center, CHINA
| | - Mei Tian
- Zhejiang University, Department of Nuclear Medicine and PET/CT Center, CHINA
| | - Xue Zhang
- Chinese Academy of Sciences, Shenzhen Institutes of Advanced Technology, CHINA
| | - Qinghua Zhang
- Zhejiang University, College of Chemical & Biological Engineering, CHINA
| | - Kaiwu Yu
- Zhejiang University, College of Chemical & Biological Engineering, CHINA
| | - Hong Zhang
- Zhejiang University, Department of Nuclear Medicine and PET/CT Center, CHINA
| | - Wangjun Gu
- Zhejiang University, College of Chemical & Biological Engineering, CHINA
| | - Qinggang He
- Zhejiang University, Chemical Engineering, 38 Zheda Rd., 310027, Hangzhou, CHINA
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Elkamhawy A, Paik S, Park JH, Kim HJ, Hassan AHE, Lee K, Park KD, Roh EJ. Discovery of novel and potent safinamide-based derivatives as highly selective hMAO-B inhibitors for treatment of Parkinson's disease (PD): Design, synthesis, in vitro, in vivo and in silico biological studies. Bioorg Chem 2021; 115:105233. [PMID: 34390968 DOI: 10.1016/j.bioorg.2021.105233] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/27/2021] [Accepted: 07/29/2021] [Indexed: 01/31/2023]
Abstract
Up to date, the current clinical practice employs only symptomatic treatments for management of Parkinson's disease (PD) but unable to stop disease progression. The discovery of new chemical entities endowed with potent and selective human monoamine oxidase B (hMAO-B) inhibitory activity is a clinically relevant subject. Herein, a structural optimization strategy for safinamide (a well-known second generation hMAO-B inhibitor) afforded a series of thirty-six safinamide-derived new analogs (4aa-bj). Most compounds showed promising inhibitory activities against hMAO-B (>70% inhibition at a single dose concentration of 10 µM), with no apparent effect on hMAO-A at 100 μM. Moreover, while six compounds (4ak, 4as, 4az, 4be, 4bg, and 4bi) exhibited potent double-digit nanomolar activities over hMAO-B with IC50 values of 29.5, 42.2, 22.3, 18.8, 42.2, and 33.9 nM, respectively, three derivatives (4aq, 4at, and 4bf), possessing the same carboxamide moiety (2-pyrazinyl), showed the most potent single-digit nanomolar activities (IC50 = 9.7, 5.1, and 3.9 nM, respectively). Compound 4bf revealed an excellent selectivity index (SI > 25641) with a 29-fold increase compared to safinamide (SI > 892). A structure activity relationship along with molecular docking simulations provided insights into enzyme - inhibitor interactions and a rational for the observed activity. In an in vivo MPTP-induced mouse model of PD, oral administration of compound 4bf significantly protected nigrostriatal dopaminergic neurons as revealed by tyrosine hydroxylase staining and prevented MPTP-induced Parkinsonism as revealed by motor behavioral assays. Accordingly, we present compound 4bf as a novel, highly potent, and selective hMAO-B inhibitor with an effective therapeutic profile for relieving PD.
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Affiliation(s)
- Ahmed Elkamhawy
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Republic of Korea; Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
| | - Sora Paik
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Jong-Hyun Park
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Hyeon Jeong Kim
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Ahmed H E Hassan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
| | - Kyeong Lee
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Republic of Korea
| | - Ki Duk Park
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea.
| | - Eun Joo Roh
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea.
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Nair AS, Oh JM, Koyiparambath VP, Kumar S, Sudevan ST, Soremekun O, Soliman ME, Khames A, Abdelgawad MA, Pappachen LK, Mathew B, Kim H. Development of Halogenated Pyrazolines as Selective Monoamine Oxidase-B Inhibitors: Deciphering via Molecular Dynamics Approach. Molecules 2021; 26:molecules26113264. [PMID: 34071665 PMCID: PMC8198649 DOI: 10.3390/molecules26113264] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/24/2021] [Accepted: 05/27/2021] [Indexed: 02/08/2023] Open
Abstract
Halogens have been reported to play a major role in the inhibition of monoamine oxidase (MAO), relating to diverse cognitive functions of the central nervous system. Pyrazoline/halogenated pyrazolines were investigated for their inhibitory activities against human monoamine oxidase-A and -B. Halogen substitutions on the phenyl ring located at the fifth position of pyrazoline showed potent MAO-B inhibition. Compound 3-(4-ethoxyphenyl)-5-(4-fluorophenyl)-4,5-dihydro-1H-pyrazole (EH7) showed the highest potency against MAO-B with an IC50 value of 0.063 µM. The potencies against MAO-B were increased in the order of –F (in EH7) > –Cl (EH6) > –Br (EH8) > –H (EH1). The residual activities of most compounds for MAO-A were > 50% at 10 µM, except for EH7 and EH8 (IC50 = 8.38 and 4.31 µM, respectively). EH7 showed the highest selectivity index (SI) value of 133.0 for MAO-B, followed by EH6 at > 55.8. EH7 was a reversible and competitive inhibitor of MAO-B in kinetic and reversibility experiments with a Ki value of 0.034 ± 0.0067 µM. The molecular dynamics study documented that EH7 had a good binding affinity and motional movement within the active site with high stability. It was observed by MM-PBSA that the chirality had little effect on the overall binding of EH7 to MAO-B. Thus, EH7 can be employed for the development of lead molecules for the treatment of various neurodegenerative disorders.
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Affiliation(s)
- Aathira Sujathan Nair
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, AIMS Health Sciences Campus, Amrita Vishwa Vidyapeetham, Kochi 682 041, India; (A.S.N.); (V.P.K.); (S.K.); (S.T.S.)
| | - Jong-Min Oh
- Department of Pharmacy, Research Institute of Life Pharmaceutical Sciences, Sunchon National University, Suncheon 57922, Korea;
| | - Vishal Payyalot Koyiparambath
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, AIMS Health Sciences Campus, Amrita Vishwa Vidyapeetham, Kochi 682 041, India; (A.S.N.); (V.P.K.); (S.K.); (S.T.S.)
| | - Sunil Kumar
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, AIMS Health Sciences Campus, Amrita Vishwa Vidyapeetham, Kochi 682 041, India; (A.S.N.); (V.P.K.); (S.K.); (S.T.S.)
| | - Sachithra Thazhathuveedu Sudevan
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, AIMS Health Sciences Campus, Amrita Vishwa Vidyapeetham, Kochi 682 041, India; (A.S.N.); (V.P.K.); (S.K.); (S.T.S.)
| | - Opeyemi Soremekun
- Molecular Bio-computation and Drug Design Laboratory, School of Health Sciences, Westville Campus, University of KwaZulu-Natal, Durban 4001, South Africa; (O.S.); (M.E.S.)
| | - Mahmoud E. Soliman
- Molecular Bio-computation and Drug Design Laboratory, School of Health Sciences, Westville Campus, University of KwaZulu-Natal, Durban 4001, South Africa; (O.S.); (M.E.S.)
| | - Ahmed Khames
- Department of Pharmaceutics and Industrial Pharmacy, College of Pharmacy, Taif University, P.O. Box-11099, Taif 21944, Saudi Arabia;
| | - Mohamed A. Abdelgawad
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka 72341, Saudi Arabia;
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Beni-Suef University, Beni Suef 62514, Egypt
| | - Leena K. Pappachen
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, AIMS Health Sciences Campus, Amrita Vishwa Vidyapeetham, Kochi 682 041, India; (A.S.N.); (V.P.K.); (S.K.); (S.T.S.)
- Correspondence: (L.K.P.); or (B.M.); (H.K.)
| | - Bijo Mathew
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, AIMS Health Sciences Campus, Amrita Vishwa Vidyapeetham, Kochi 682 041, India; (A.S.N.); (V.P.K.); (S.K.); (S.T.S.)
- Correspondence: (L.K.P.); or (B.M.); (H.K.)
| | - Hoon Kim
- Department of Pharmacy, Research Institute of Life Pharmaceutical Sciences, Sunchon National University, Suncheon 57922, Korea;
- Correspondence: (L.K.P.); or (B.M.); (H.K.)
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Wasan H, Singh D, Kh R. Safinamide in neurological disorders and beyond: Evidence from preclinical and clinical studies. Brain Res Bull 2020; 168:165-177. [PMID: 33387637 DOI: 10.1016/j.brainresbull.2020.12.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/04/2020] [Accepted: 12/27/2020] [Indexed: 01/08/2023]
Abstract
The discovery and development of safinamide, an alpha-aminoamide, has been a valuable addition to the existing clinical management of Parkinson's disease (PD). The journey of safinamide dates back to the year 1983, when an alpha-aminoamide called milacemide showed a weak anticonvulsant activity. Milacemide was then structurally modified to give rise to safinamide, which in turn produced robust anticonvulsant activity. The underlying mechanism behind this action of safinamide is attributed to the inhibition of voltage gated calcium and sodium channels. Moreover, owing to the importance of ion channels in maintaining neuronal circuitry and neurotransmitter release, numerous studies explored the potential of safinamide in neurological diseases including PD, stroke, multiple sclerosis and neuromuscular disorders such as Duchenne muscular dystrophy and non-dystrophic myotonias. Nevertheless, evidence from multiple preclinical studies suggested a potent, selective and reversible inhibitory activity of safinamide against monoamine oxidase (MAO)-B enzyme which is responsible for degrading dopamine, a neurotransmitter primarily implicated in the pathophysiology of PD. Therefore, clinical studies were conducted to assess safety and efficacy of safinamide in PD. Indeed, results from various Phase 3 clinical trials suggested strong evidence of safinamide as an add-on therapy in controlling the exacerbation of PD. This review presents a thorough developmental history of safinamide in PD and provides comprehensive insight into plausible mechanisms via which safinamide can be explored in other neurological and muscular diseases.
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Affiliation(s)
- Himika Wasan
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India.
| | - Devendra Singh
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India.
| | - Reeta Kh
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India.
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Abstract
The deficiency pattern of neurotransmitters is heterogeneous in patients with Parkinson's disease. Consequence is an individual variable expression of motor and nonmotor features. They respond to agents with a broader spectrum of mode of actions, whereas dopamine substitution only targets impaired motor behavior. The pharmacological profile of safinamide includes reversible monoamine oxidase B inhibition and modulation of voltage-dependent sodium- and calcium channels with consecutive decline of glutamate release. Safinamide improves motor and nonmotor symptoms. Combination of safinamide with the catechol-O-methyltransferase inhibitor opicapone in one capsule is a promising future treatment alternative, which simplifies drug therapy in Parkinson's disease. Both agents complement each other in terms of application mode and efficacy on motor complications as adjuncts to levodopa therapy.
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Affiliation(s)
- Thomas Müller
- Department of Neurology, St Joseph Hospital Berlin-Weißensee, Gartenstr. 1, 13088 Berlin, Germany
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12
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Parambi DGT. Treatment of Parkinson's Disease by MAO-B Inhibitors, New Therapies and Future Challenges - A Mini-Review. Comb Chem High Throughput Screen 2020; 23:847-861. [PMID: 32238135 DOI: 10.2174/1386207323666200402090557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 12/30/2019] [Accepted: 01/23/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND One of the most prevalent neurodegenerative diseases with increasing age is Parkinson's disease (PD). Its pathogenesis is unclear and mainly confined to glutamate toxicity and oxidative stress. The dyskinesia and motor fluctuations and neuroprotective potential are the major concerns which are still unmet in PD therapy. OBJECTIVE This article is a capsulization of the role of MAO-B in the treatment of PD, pharmacological properties, safety and efficiency, clinical evidence through random trials, future therapies and challenges. CONCLUSION MAO-B inhibitors are well tolerated for the treatment of PD because of their pharmacokinetic properties and neuroprotective action. Rasagiline and selegiline were recommended molecules for early PD and proven safe and provide a modest to significant rise in motor function, delay the use of levodopa and used in early PD. Moreover, safinamide is antiglutamatergic in action. When added to Levodopa, these molecules significantly reduce the offtime with a considerable improvement of non-motor symptoms. This review also discusses the new approaches in therapy like the use of biomarkers, neurorestorative growth factors, gene therapy, neuroimaging, neural transplantation, and nanotechnology. Clinical evidence illustrated that MAOB inhibitors are recommended as monotherapy and added on therapy to levodopa. A large study and further evidence are required in the field of future therapies to unwind the complexity of the disease.
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Affiliation(s)
- Della G T Parambi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Jouf University, Sakaka, Jouf, Saudi Arabia
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Bette S, Shpiner DS, Singer C, Moore H. Safinamide in the management of patients with Parkinson's disease not stabilized on levodopa: a review of the current clinical evidence. Ther Clin Risk Manag 2018; 14:1737-1745. [PMID: 30271159 PMCID: PMC6152599 DOI: 10.2147/tcrm.s139545] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Safinamide (Xadago®) is a novel medication with both dopaminergic and non-dopaminergic effects, approved first by the European Commission and more recently by the US Food and Drug Administration (FDA) as an adjunctive treatment to carbidopa/levodopa in patients with mid- to late-stage Parkinson’s disease (PD) and motor fluctuations. It works through multiple mechanisms, namely as a reversible selective monoamine oxidase-B inhibitor and through modulation of glutamate release. Safinamide is extensively metabolized via oxidation to several inactive metabolites that are excreted primarily through the urine. Several large Phase III clinical trials of patients with advanced PD with motor fluctuations have shown that safinamide, administered orally at doses of 50–100 mg daily, increased ON time with no or non-troublesome dyskinesia, decreased daily OFF time, improved overall motor function (as measured by Unified Parkinson’s Disease Rating Scale [UPDRS] part III total score), and quality of life (as measured by Clinical Global Impression-Change and 39-item Parkinson’s Disease Questionnaire). In large clinical trials of patients with early PD on a single dopamine agonist, safinamide administered orally at a dose of 100 mg daily improved overall motor function as measured by UPDRS part III total score; however, some of the results reported were exploratory. Safinamide is generally well-tolerated and safe, with few to no treatment-related adverse events. Safinamide does not cause new or worsening dyskinesia and may be able to reduce this symptom in patients reporting it at baseline. Evidence suggests that safinamide is a good option for add-on therapy to carbidopa/levodopa in patients with advanced PD with motor complications, but there is still insufficient evidence to recommend it as monotherapy or add-on therapy in patients with early PD.
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Affiliation(s)
- Sagari Bette
- Department of Neurology, Division of Parkinson's Disease and Movement Disorders, University of Miami - Miller School of Medicine, Miami, FL, USA,
| | - Danielle S Shpiner
- Department of Neurology, Division of Parkinson's Disease and Movement Disorders, University of Miami - Miller School of Medicine, Miami, FL, USA,
| | - Carlos Singer
- Department of Neurology, Division of Parkinson's Disease and Movement Disorders, University of Miami - Miller School of Medicine, Miami, FL, USA,
| | - Henry Moore
- Department of Neurology, Division of Parkinson's Disease and Movement Disorders, University of Miami - Miller School of Medicine, Miami, FL, USA,
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14
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Abstract
Heterogeneous expression of neurotransmitter deficits results from onset and progression of Parkinson's disease. Intervals, characterized by reappearance of motor and associated certain nonmotor symptoms, determine the end of good tolerability and efficacy of oral levodopa therapy. These "OFF" states result from levodopa pharmacokinetics and disease progression-related deterioration of the central buffering capacity for fluctuations of dopamine levels. This review discusses safinamide as an add-on therapeutic agent in orally levodopa-treated patients with "OFF" phenomena. Safinamide provided beneficial effects on "OFF" symptoms in pivotal trials with doses of 50 or 100 mg once daily. Safinamide reversibly inhibits mono-amine oxidase B and declines abnormal glutamate release by modulation of potassium- and sodium ion channels. An ideal candidate for combination with safinamide is opicapone. This inhibitor of peripheral catechol-O-methyltransferase supports continuous brain delivery of levodopa and, thus, the continuous dopaminergic stimulation concept. Both compounds with their once-daily application and good tolerability may complement each other by reduction of necessary oral levodopa intakes and "OFF" times. Thus, a promising, future option will be combination of safinamide and opicapone in one formulation. It will reduce adherence issues and may complement levodopa treatment. It will probably cause less nausea and edema than a dopamine agonist/levodopa regimen.
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Affiliation(s)
- Thomas Müller
- Department of Neurology, St. Joseph Hospital Berlin-Weißensee, Berlin, Germany
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Affiliation(s)
| | - Anne P Kim
- Washington State University, Yakima, USA
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Müller T. Pharmacokinetic drug evaluation of safinamide mesylate for the treatment of mid-to-late stage Parkinson’s disease. Expert Opin Drug Metab Toxicol 2017; 13:693-699. [DOI: 10.1080/17425255.2017.1329418] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Thomas Müller
- Department of Neurology, St. Joseph Hospital Berlin-Weißensee, Berlin, Germany
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17
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Abstract
Safinamide (Xadago®) is an orally active, selective, reversible monoamine oxidase-B inhibitor with both dopaminergic and non-dopaminergic (glutamatergic) properties. In the EU, safinamide is approved for the treatment of mid- to late-stage fluctuating Parkinson's disease (PD) as add-on therapy to a stable dose of levodopa alone or in combination with other PD medications. Safinamide 50-100 mg/day administered as a fixed or flexible dose significantly increased daily 'on' time without dyskinesia (primary endpoint) in patients with mid- to late-stage PD with motor fluctuations in 24-week, placebo-controlled clinical trials. Other outcomes, including motor function, overall clinical status and health-related quality of life, were also generally improved with safinamide. Furthermore, in an 18-month extension of one study, although dyskinesia (primary endpoint) was not significantly improved with safinamide relative to placebo, treatment benefits in other outcomes were generally sustained over 24 months of treatment. Safinamide was generally well tolerated in clinical trials; dyskinesia was the most common adverse event. Although further studies are needed, including comparative and long-term studies, current evidence indicates that safinamide extends the treatment options available for use as add-on therapy to levodopa and other PD medications in patients with mid- to late-stage PD experiencing motor fluctuations.
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Affiliation(s)
- Hannah A Blair
- Springer, Private Bag 65901, Mairangi Bay, 0754, Auckland, New Zealand.
| | - Sohita Dhillon
- Springer, Private Bag 65901, Mairangi Bay, 0754, Auckland, New Zealand
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Loprete L, Leuratti C, Cattaneo C, Thapar MM, Farrell C, Sardina M. Population pharmacokinetic and pharmacodynamic analyses of safinamide in subjects with Parkinson's disease. Pharmacol Res Perspect 2016; 4:e00251. [PMID: 27713822 PMCID: PMC5045937 DOI: 10.1002/prp2.251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 07/11/2016] [Indexed: 11/06/2022] Open
Abstract
Safinamide is an orally administered α‐aminoamide derivative with both dopaminergic and non‐dopaminergic properties. Nonlinear mixed effects models for population pharmacokinetic (PK) and pharmacokinetic–pharmacodynamic (PKPD) analyses were developed using records from, respectively, 623 and 668 patients belonging to two Phase 3, randomized, placebo‐controlled, double‐blind efficacy studies. The aim was to estimate safinamide population PK parameters in patients with Parkinson's disease (PD) on stable levodopa therapy, and to develop a model of safinamide effect on the PD phase of normal functioning (ON‐time). The final models were internally evaluated using visual predictive checks (VPCs), prediction corrected‐VPC, and nonparametric bootstrap analysis. Safinamide profiles were adequately described by a linear one‐compartmental model with first‐order absorption and elimination. CL/F, Vd/F, and KA (95% confidence interval [CI]) were 4.96 (4.73–5.21) L/h, 166 (158–174) L, and 0.582 (0.335–0.829) h−1, respectively. CL/F and Vd/F increased with body weight, while age, gender, renal function, and exposure to levodopa did not influence safinamide PK. The observed ON‐time values were adequately described by a linear model, with time in the study period as dependent variable, and rate of ON‐time change and baseline plus offset effect as slope and intercept parameters. Safinamide treatment resulted in an increase in ON‐time of 0.73 h (week 4), with further ON‐time increase with the same slope as placebo. The increase was not influenced by age, levodopa, or safinamide exposure. The population models adequately describe the population PK of safinamide and safinamide effect on ON‐time. No dose adjustments in elderly and mild to moderate renally impaired patients are requested.
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Affiliation(s)
- Luca Loprete
- CROSS Metrics S.A. via L.Lavizzari 18 6850 Mendrisio Switzerland
| | - Chiara Leuratti
- CROSS Research S.A. via F.A. Giorgioli 6864 Arzo Switzerland
| | - Carlo Cattaneo
- Medical Department Zambon S.p.A. via Lillo del Duca 10 20091 Bresso MI Italy
| | - Mita M Thapar
- ICON Early Phase Services Globeside 2, Globeside Business Park Marlow SL7 1HZ United Kingdom
| | - Colm Farrell
- ICON Early Phase Services Globeside 2, Globeside Business Park Marlow SL7 1HZ United Kingdom
| | - Marco Sardina
- R&D Department Zambon S.p.A. via Lillo del Duca 10 20091 Bresso MI Italy
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20
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Perez-Lloret S, Rascol O. The safety and efficacy of safinamide mesylate for the treatment of Parkinson's disease. Expert Rev Neurother 2016; 16:245-58. [PMID: 26849427 DOI: 10.1586/14737175.2016.1150783] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Safinamide (brand name Xadago®, Zambon S.p.A) is a third-generation reversible MAO-B inhibitor, which also blocks sodium voltage-sensitive channels and modulates stimulated release of glutamate. Safinamide was recently licensed by EMA for the treatment of PD as add-on therapy to a stable dose of levodopa alone or in combination with other PD medicinal products in mid-to advanced-stage fluctuating patients. It is also under review by the US FDA. Studies in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated monkeys and 6OHDA-lesioned rats suggest antiparkinsonian efficacy and antidyskinesic effects. Randomized, double-blind, placebo-controlled trials have shown efficacy for the treatment of motor symptoms in stable PD patients on dopamine agonists and in fluctuating PD patients on levodopa. Significant improvement in daily ON time was also observed in the latter. This effect was maintained for at least 2 years in double-blind conditions and, interestingly, without significant worsening of dyskinesia. Clinical studies have not detected any specific safety issue other than those already known with MAO-B inhibitors.
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Affiliation(s)
- Santiago Perez-Lloret
- a Institute of Cardiologic Research, National Scientific and Research Council (ININCA-CONICET), Faculty of Medicine , University of Buenos Aires , Buenos Aires , Argentina
| | - Olivier Rascol
- b Department of Clinical Pharmacology and Neurosciences , NeuroToul Excellence Center for Neurodegenerative Disorders, University Hospital and University of Toulouse 3 , Toulouse , France.,c INSERM CIC1436 and UMR825 , Toulouse , France.,d NS-Park Network, INSERM , Toulouse , France
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21
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Fabbri M, Rosa MM, Abreu D, Ferreira JJ. Clinical pharmacology review of safinamide for the treatment of Parkinson’s disease. Neurodegener Dis Manag 2015; 5:481-96. [DOI: 10.2217/nmt.15.46] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Safinamide (Xadago™) is an oral α-aminoamide derivative marketed for the treatment of Parkinson’s disease (PD). The drug has both dopaminergic properties, namely highly selective and reversible inhibition of monoamine oxidase B, and nondopamimetic properties, namely selective sodium channel blockade and calcium channel modulation, with consequent inhibition of excessive glutamate release. In 2014, safinamide was approved in the European Economic Area, as “an add-on therapy to stable dose levodopa, alone or in combination with other PD therapies in mid- to late-stage-fluctuating PD patients.” In addition, evidence has been provided for safinamide in the treatment of motor symptoms in early PD patients. This article summarizes the pharmacological properties, development program, clinical indications for PD treatment, stratified according to several disease’s stages and the safety profile of safinamide. A meta-analysis of the most frequent adverse events among Phase III trials has been also performed.
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Affiliation(s)
- Margherita Fabbri
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
| | - Mario M Rosa
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
- Department of Neurosciences, Serviço de Neurologia, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
- Laboratory of Clinical Pharmacology & Therapeutics, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - Daisy Abreu
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
| | - Joaquim J Ferreira
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
- Department of Neurosciences, Serviço de Neurologia, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
- Laboratory of Clinical Pharmacology & Therapeutics, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
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23
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Kandadai RM, Jabeen SA, Kanikannan MA, Borgohain R. Safinamide for the treatment of Parkinson’s disease. Expert Rev Clin Pharmacol 2014; 7:747-59. [DOI: 10.1586/17512433.2014.968555] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Richel DJ, Colly LP, Lurvink E, Willemze R. Comparison of the antileukaemic activity of 5 aza-2-deoxycytidine and arabinofuranosyl-cytosine in rats with myelocytic leukaemia. Br J Cancer 1989; 23:729-42. [PMID: 2465015 DOI: 10.1517/13543784.2014.897694] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Using a Brown Norway rat leukaemia model (BNML), which is a realistic model of human myelocytic leukaemia, we compared the antileukaemic activity, influence on cell cycle kinetics and effect on normal haematopoiesis of 5 aza-2-deoxycytidine (aza-dC) and arabinofuranosyl-cytosine (ara-C). The antileukaemic activity was evaluated by means of a survival study. For aza-dC a dose-response relationship was demonstrated for doses up to 50 mg kg-1 (3 times q 12 h); a higher dose resulted in only a slight increase in median survival time (MST). For ara-C a weak dose-response relationship was observed. At the maximum dose of aza-dC and ara-C tested, aza-dC induced a 10-day longer survival time than ara-C, which means 2 logs more of leukaemic cell kill for aza-dC. By means of flow cytometric analysis and a 3HTdR uptake study it was shown that aza-dC does not influence the cell cycle kinetics in the first 24 h after exposure, in contrast to ara-C which caused the characteristic G1/S blockage and synchronization. The influence of aza-dC and ara-C on normal haematopoiesis was evaluated with the CFU-S assay. The dose-response curve for CFU-S did not show a significant difference in stem cell cytotoxicity between aza-dC and ara-C. In the BNML model aza-dC is a much more effective antileukaemic agent than ara-C, while the toxic effect on normal haematopoiesis is comparable to that of ara-C.
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Affiliation(s)
- D J Richel
- Division of Hematology, University Hospital Leiden, The Netherlands
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