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Zhang L, Sun H, Liu Y, Lai X, Gong Y, Liu X, Li YG, He Y, Zhang EY, Yan X. Semi-mechanistic Population Pharmacokinetics Analysis Reveals Distinct CYP2C19 Dependency in the Bioactivation of Vicagrel and Clopidogrel to Active Metabolite M15-2. Eur J Pharm Sci 2022; 177:106264. [PMID: 35868434 DOI: 10.1016/j.ejps.2022.106264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/22/2022] [Accepted: 07/18/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Lin Zhang
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
| | - Hongbin Sun
- State Key Laboratory of Natural Medicines and Center of Drug Discovery, College of Pharmacy, China Pharmaceutical University, Nanjing, China
| | | | - Xiaojuan Lai
- Jiangsu Vcare PharmaTech Co., Ltd., Nanjing, China
| | - Yanchun Gong
- Jiangsu Vcare PharmaTech Co., Ltd., Nanjing, China
| | - Xuefang Liu
- Jiangsu Vcare PharmaTech Co., Ltd., Nanjing, China
| | - Yong-Guo Li
- Guangzhou Jiayue Pharmaceutical Technology Co., Ltd., Guangzhou, China
| | - Yang He
- EXDA, LLC, ROCKVILLE, MD, USA
| | | | - Xiaoyu Yan
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR.
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Schilling U, Dingemanse J, Ufer M. Pharmacokinetics and Pharmacodynamics of Approved and Investigational P2Y12 Receptor Antagonists. Clin Pharmacokinet 2021; 59:545-566. [PMID: 32056160 DOI: 10.1007/s40262-020-00864-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Coronary artery disease remains the major cause of mortality worldwide. Antiplatelet drugs such as acetylsalicylic acid and P2Y12 receptor antagonists are cornerstone treatments for the prevention of thrombotic events in patients with coronary artery disease. Clopidogrel has long been the gold standard but has major pharmacological limitations such as a slow onset and long duration of effect, as well as weak platelet inhibition with high inter-individual pharmacokinetic and pharmacodynamic variability. There has been a strong need to develop potent P2Y12 receptor antagonists with more favorable pharmacological properties. Prasugrel and ticagrelor are more potent and have a faster onset of action; however, they have shown an increased bleeding risk compared with clopidogrel. Cangrelor is highly potent and has a very rapid onset and offset of effect; however, its indication is limited to P2Y12 antagonist-naïve patients undergoing percutaneous coronary intervention. Two novel P2Y12 receptor antagonists are currently in clinical development, namely vicagrel and selatogrel. Vicagrel is an analog of clopidogrel with enhanced and more efficient formation of its active metabolite. Selatogrel is characterized by a rapid onset of action following subcutaneous administration and developed for early treatment of a suspected acute myocardial infarction. This review article describes the clinical pharmacology profile of marketed P2Y12 receptor antagonists and those under development focusing on pharmacokinetic, pharmacodynamic, and drug-drug interaction liability.
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Affiliation(s)
- Uta Schilling
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, 4123, Allschwil, Switzerland.
| | - Jasper Dingemanse
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, 4123, Allschwil, Switzerland
| | - Mike Ufer
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, 4123, Allschwil, Switzerland
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Bain KT, McGain D, Cicali EJ, Knowlton CH, Michaud V, Turgeon J. Precision medication: An illustrative case series guiding the clinical application of multi-drug interactions and pharmacogenomics. Clin Case Rep 2020; 8:305-312. [PMID: 32128178 PMCID: PMC7044418 DOI: 10.1002/ccr3.2604] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 11/06/2019] [Accepted: 11/21/2019] [Indexed: 12/22/2022] Open
Abstract
Precision medication entails selecting the precise medication, dose, and timing of administration. Multi-drug interactions and genetics significantly affect precision medication. In this article, we present two simulated cases for real-world applications of precision medication. Clinicians may need to acquire additional skills to apply the principles illustrated by these cases.
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Affiliation(s)
- Kevin T. Bain
- Tabula Rasa HealthCareMoorestownNJUSA
- Department of PharmacyUniversity of the SciencesPhiladelphiaPAUSA
| | | | - Emily J. Cicali
- Department of Pharmacotherapy and Translational ResearchUniversity of FloridaGainesvilleFLUSA
| | | | - Veronique Michaud
- Tabula Rasa HealthCareMoorestownNJUSA
- Faculty of PharmacyUniversité de MontréalMontrealQCCanada
| | - Jacques Turgeon
- Tabula Rasa HealthCareMoorestownNJUSA
- Faculty of PharmacyUniversité de MontréalMontrealQCCanada
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Interaction of CYP2C19 G681A polymorphism and omeprazole on clopidogrel responsiveness and impact in patients with acute coronary syndrome. Coron Artery Dis 2019; 31:266-272. [PMID: 31658140 DOI: 10.1097/mca.0000000000000808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The aim of this study was to explore the individual effects of the CYP2C19 G681A polymorphism and omeprazole use and their interaction on clopidogrel responsiveness in acute coronary syndrome (ACS). The CYP2C19 G681A polymorphism and omeprazole use were both known for retarding the effects of clopidogrel under broad cardiovascular conditions; however, data from ACS patients were limited. METHODS We conducted a cross-sectional study of 102 ACS patients who received clopidogrel before percutaneous coronary intervention. The platelet function was assessed by a Platelet Function Analyzer-200, in which clopidogrel hyporesponsiveness was defined as a closure time (CT) of ≤ 106 s. The CYP2C19 G681A polymorphism was investigated using the PCR-RFLP technique. Statistical analysis was performed by using χ test, Student's t-test, binary logistic regression, and receiver-operating characteristic (ROC) curve. RESULTS Carriages of the CYP2C19 681A allele and omeprazole use were present in 47.1 and 37.3% patients, respectively. The mean CT ± SD was 103.1 ± 1.7 s and the prevalence of clopidogrel hyporesponsiveness was 66.7%. The CT was significantly shorter in carriages of the 681A allele compared with the 681G allele (P = 0.002), but had no significant difference in patients with vs. without omeprazole use (P = 0.467). The ROC analysis of an effect on clopidogrel hyporesponsiveness of CYP2C19 G681A alone and combination with omeprazole use had area under the curve values of 0.654 and 0.672, respectively. CONCLUSION In ACS patients, the effect of the CYP2C19 G681A polymorphism on clopidogrel responsiveness, but not omeprazole use, is strong. However, a combination of both factors enhances clopidogrel hyporesponsiveness.
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Strisciuglio T, Franco D, Di Gioia G, De Biase C, Morisco C, Trimarco B, Barbato E. Impact of genetic polymorphisms on platelet function and response to anti platelet drugs. Cardiovasc Diagn Ther 2018; 8:610-620. [PMID: 30498685 DOI: 10.21037/cdt.2018.05.06] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cardiovascular genomic consists in the identification of polymorphic genes responsible for the susceptibility to cardiovascular disease including coronary artery disease (CAD). Genes involved in platelet activation and aggregation play a key role in the predisposition to CAD. A considerable inter-variability of platelet response to agonists and to drugs exists and in particular the hyper-reactivity phenotype seems to be heritable. Besides glycoproteins and receptors expressed on platelets surface whose mutations significantly impact on platelet function, moreover researchers in the last decades have paid great attention to the genes involved in the response to anti-platelet drugs, considering their pivotal role in the treatment and outcomes of CAD patients especially those undergoing PCI. With the outbreak of advanced techniques developed to analyse human genetic footprints, researchers nowadays have shifted from genetic linkage analysis and a candidate gene approach toward genome-wide association (GWAS) studies and the analysis of miRNA-mRNA expression profiles.
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Affiliation(s)
- Teresa Strisciuglio
- Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Danilo Franco
- Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Giuseppe Di Gioia
- Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Chiara De Biase
- Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Carmine Morisco
- Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Bruno Trimarco
- Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Emanuele Barbato
- Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
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Gastroenterological Perspectives on Acute Cardiac Care — the Management of Patients with Implanted Coronary Stents Following an Acute Coronary Syndrome. JOURNAL OF CARDIOVASCULAR EMERGENCIES 2018. [DOI: 10.2478/jce-2018-0006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Cardiovascular and digestive diseases frequently share the same risk factors such as obesity, unhealthy diet, or several social behaviors, and the increasing prevalence of patients with overlapped cardiovascular and digestive symptoms is a challenging problem in the daily practice. Patients with gastro-esophageal reflux disease can exhibit various forms of chest pain that can be very similar to angina. Furthermore, antithrombotic therapies used for preventive or curative purposes in patients with cardiovascular diseases are frequently associated with gastrointestinal side effects including bleeding. At the same time, in patients with coronary stents presenting to the emergency department with chest pain, angina triggered by stent thrombosis or restenosis should be differentiated from angina-like symptoms caused by a gastrointestinal disease. The aim of this review was to present the complex inter-relation between gastroesophageal diseases and angina in patients on dual antiplatelet therapy following an acute coronary syndrome, with a particular emphasis on the role of anemia resulting from occult or manifest gastrointestinal bleeding, as a precipitating factor for triggering or aggravating angina.
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Yi ZM, Qiu TT, Zhang Y, Liu ZY, Zhai SD. Comparison of prophylactic effect of UGIB and effects on platelet function between PPIs and H 2RAs combined with DAPT: systematic review and meta-analysis. Ther Clin Risk Manag 2017; 13:367-377. [PMID: 28392699 PMCID: PMC5373835 DOI: 10.2147/tcrm.s127292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Objective We compared prophylactic effects of proton pump inhibitors (PPIs) and histamine-2 receptor antagonists (H2RAs) on upper gastrointestinal bleeding (UGIB) associated with dual antiplatelet therapy (DAPT) and explored this influence on platelet function. Methods Randomized controlled trials and cohort studies comparing PPIs with H2RAs in adults receiving DAPT were collected from PubMed, EMBASE and Cochrane databases. Dichotomous data were pooled to obtain risk ratios (RRs) for UGIB, major adverse cardiovascular events (MACEs), poor responders to clopidogrel and rehospitalization, and continuous data were pooled to obtain mean differences (MDs) for P2Y12 reaction units (PRUs), with 95% confidence intervals (CIs). Results Twelve clinical trials (n=3,301) met the inclusion criteria. Compared to H2RAs, PPIs lessened UGIB (RR =0.16, 95% CI: 0.03–0.70), and there was no significant difference in the incidence of PRUs (MD =18.21 PRUs, 95% CI: −4.11–40.54), poor responders to clopidogrel (RR =1.21, 95% CI: 0.92–1.61), incidence of MACEs (RR =0.89, 95% CI: 0.45–1.75) or rehospitalization (RR =1.76, 95% CI: 0.79–3.92). Subgroup analysis confirmed fewer PRUs in the H2RAs group compared to the omeprazole group (2 studies, n=189, MD =31.80 PRUs, 95% CI: 11.65–51.96). However, poor responder data for clopidogrel and MACEs might be unreliable because few studies of this kind were included. Conclusion Limited evidence indicates that PPIs were better than H2RAs for prophylaxis of UGIB associated with DAPT and had no effect on platelet function. Further study is needed to confirm these observations.
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Affiliation(s)
- Zhan-Miao Yi
- Department of Pharmacy, Peking University Third Hospital, Beijing
| | - Ting-Ting Qiu
- Department of Pharmacy, Peking University Third Hospital, Beijing; Department of Pharmacy, China Pharmaceutical University, Nanjing, People's Republic of China
| | - Yuan Zhang
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada
| | - Zhi-Yan Liu
- Department of Pharmacy, Peking University Third Hospital, Beijing
| | - Suo-Di Zhai
- Department of Pharmacy, Peking University Third Hospital, Beijing
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de la Coba Ortiz C, Argüelles Arias F, Martín de Argila de Prados C, Júdez Gutiérrez J, Linares Rodríguez A, Ortega Alonso A, Rodríguez de Santiago E, Rodríguez-Téllez M, Vera Mendoza MI, Aguilera Castro L, Álvarez Sánchez Á, Andrade Bellido RJ, Bao Pérez F, Castro Fernández M, Giganto Tomé F. Proton-pump inhibitors adverse effects: a review of the evidence and position statement by the Sociedad Española de Patología Digestiva. REVISTA ESPANOLA DE ENFERMEDADES DIGESTIVAS 2017; 108:207-24. [PMID: 27034082 DOI: 10.17235/reed.2016.4232/2016] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION In the last few years a significant number of papers have related the use of proton-pump inhibitors (PPIs) to potential serious adverse effects that have resulted in social unrest. OBJECTIVE The goal of this paper was to provide a literature review for the development of an institutional position statement by Sociedad Española de Patología Digestiva (SEPD) regarding the safety of long-term PPI use. MATERIAL AND METHODS A comprehensive review of the literature was performed to draw conclusions based on a critical assessment of the following: a) current PPI indications; b) vitamin B12 deficiency and neurological disorders; c) magnesium deficiency; d) bone fractures; e) enteric infection and pneumonia; f) interactions with thienopyridine derivatives; e) complications in cirrhotic patients. RESULTS Current PPI indications have remained unchanged for years now, and are well established. A general screening of vitamin B12 levels is not recommended for all patients on a PPI; however, it does seem necessary that magnesium levels be measured at therapy onset, and then monitored in subjects on other drugs that may induce hypomagnesemia. A higher risk for bone fractures is present, even though causality cannot be concluded for this association. The association between PPIs and infection with Clostridium difficile is mild to moderate, and the risk for pneumonia is low. In patients with cardiovascular risk receiving thienopyridines derivatives it is prudent to adequately consider gastrointestinal and cardiovascular risks, given the absence of definitive evidence regardin potential drug-drug interactions; if gastrointestinal risk is found to be moderate or high, effective prevention should be in place with a PPI. PPIs should be cautiously indicated in patients with decompensated cirrhosis. CONCLUSIONS PPIs are safe drugs whose benefits outweigh their potential side effects both short-term and long-term, provided their indication, dosage, and duration are appropriate.
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Affiliation(s)
| | | | | | - Javier Júdez Gutiérrez
- Departamento de Gestión del Conocimiento, Sociedad Española de Patología Digestiva SEPD, España
| | | | - Aida Ortega Alonso
- UGC Enfermedades Digestivas, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Virgen de la Victoria, España
| | | | - Manuel Rodríguez-Téllez
- UGC Intercentros de Aparato Digestivo , Hospital Universitario Virgen de la Macarena (HUVM), España
| | | | | | - Ángel Álvarez Sánchez
- Servicio de Aparato Digestivo, Hospital Clínico San Carlos. Universidad Complutense de Madrid., España
| | - Raúl Jesús Andrade Bellido
- Unidad de Gestión Clinica de Aparato Digestivo, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Virgen de la Victoria, España
| | | | | | - Froilán Giganto Tomé
- Servicio de Aparato Digestivo, Hospital Universitario Central de Asturias, España
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Shamliyan TA, Middleton M, Borst C. Patient-centered Outcomes with Concomitant Use of Proton Pump Inhibitors and Other Drugs. Clin Ther 2017; 39:404-427.e36. [PMID: 28189362 DOI: 10.1016/j.clinthera.2017.01.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 12/19/2016] [Accepted: 01/06/2017] [Indexed: 12/16/2022]
Abstract
PURPOSE We performed a systematic review of patient-centered outcomes after the concomitant use of proton pump inhibitors (PPIs) and other drugs. METHODS We searched 4 databases in July 2016 to find studies that reported mortality and morbidity after the concomitant use of PPIs and other drugs. We conducted direct meta-analyses using a random-effects model and graded the quality of evidence according to the Grading of Recommendations Assessment, Development and Evaluation working group approach. FINDINGS We included data from 17 systematic reviews and meta-analyses, 16 randomized controlled trials, and 16 observational studies that examined the concomitant use of PPIs with medications from 10 drug classes. Low-quality evidence suggests that the use of PPIs is associated with greater morbidity when administered with antiplatelet drugs, bisphosphonates, antibiotics, anticoagulants, metformin, mycophenolate mofetil, or nelfinavir. Concomitant PPIs reduce drug-induced gastrointestinal bleeding and are associated with greater docetaxel and cisplatin response rates in patients with metastatic breast cancer. For demonstrated statistically significant relative risks and benefits from concomitant PPIs, the magnitudes of the effects are small, with <100 attributable events per 1000 patients treated, and the effects are inconsistent among specific drugs. Among individual PPIs, the concomitant use of pantoprazole or esomeprazole, but not omeprazole or lansoprazole, is associated with an increased risk for all-cause mortality, nonfatal myocardial infarction, or stroke. Clopidogrel is associated with a greater risk for myocardial infarction compared with prasugrel. Conflicting results between randomized controlled trials and observational studies and high risk for bias in the body of evidence lessened our confidence in the results. IMPLICATIONS Available evidence suggests a greater risk for adverse patient outcomes after the concomitant use of PPIs and medications from 9 drug classes and warns against inappropriate drug combinations.
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Affiliation(s)
- Tatyana A Shamliyan
- Evidence-Based Medicine Center, Quality Assurance, Elsevier, Philadelphia, Pennsylvania.
| | - Maria Middleton
- Evidence-Based Medicine Center, Elsevier, Philadelphia, Pennsylvania
| | - Clarissa Borst
- Clinical Drug Information, Elsevier, Philadelphia, Pennsylvania
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Yi X, Han Z, Zhou Q, Cheng W, Lin J, Wang C. Concomitant Use of Proton-Pump Inhibitors and Clopidogrel Increases the Risk of Adverse Outcomes in Patients With Ischemic Stroke Carrying Reduced-Function CYP2C19*2. Clin Appl Thromb Hemost 2016; 24:55-62. [PMID: 27637911 DOI: 10.1177/1076029616669787] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE Conflicting data exist as to whether proton-pump inhibitors (PPIs) diminish the efficacy of clopidogrel. The aim of this study was to investigate the association between cytochrome P450 ( CYP) genetic variants and clinical adverse outcomes of concomitant use of PPIs and clopidogrel by patients. METHODS We consecutively enrolled 523 patients with ischemic stroke receiving clopidogrel. Platelet aggregation was measured before and after 7 to 10 days of clopidogrel treatment. Single-nucleotide polymorphisms of CYP3A4, CYP3A5, CYP2C19*2, and CYP2C19*3 were examined using mass spectrometry. The primary outcome was a composite of recurrent ischemic stroke (RIS), myocardial infarction (MI), and vascular death that occurred during the 1-year follow-up period. The safety outcome was hemorrhagic episodes that occurred during the 1-year follow-up period. RESULTS This study comprised a total of 523 patients with IS, 96.3% (155/161) patients treated with PPIs and 95.9% (347/362) in patients treated without PPIs completed 1-year follow-up. The primary outcome was observed in 69 (13.7%) patients (56 RIS, 7 MI, and 6 died). There was no significant difference in the frequencies of primary outcome and safety outcome between patients treated with or without PPIs. The frequency of primary outcome was significantly higher in patients carrying CYP2C19*2 AG/AA genotype receiving PPIs compared with the same genotype in those not receiving PPIs. The PPIs used in patients carrying CYP2C19*2 AG/AA was independently associated with the primary outcome after adjusting for other risk factors. CONCLUSIONS The concomitant use of PPIs and clopidogrel may be associated with an increased risk of RIS, MI, or vascular death in patients with IS carrying reduced-function CYP2C19*2.
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Affiliation(s)
- Xingyang Yi
- 1 Department of Neurology, People's Hospital of Deyang City, Deyang, Sichuan, China
| | - Zhao Han
- 2 Department of Neurology, Second Affiliated Hospital of Wenzhou Medical College, Wenzhou, Zhejiang, China
| | - Qiang Zhou
- 3 Department of Neurology, Third Affiliated Hospital of Wenzhou Medical College, Wenzhou, Zhejiang, China
| | - Wen Cheng
- 1 Department of Neurology, People's Hospital of Deyang City, Deyang, Sichuan, China
| | - Jing Lin
- 3 Department of Neurology, Third Affiliated Hospital of Wenzhou Medical College, Wenzhou, Zhejiang, China
| | - Chun Wang
- 1 Department of Neurology, People's Hospital of Deyang City, Deyang, Sichuan, China
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Impact of genetic polymorphisms related to clopidogrel or acetylsalicylic acid pharmacology on clinical outcome in Chinese patients with symptomatic extracranial or intracranial stenosis. Eur J Clin Pharmacol 2016; 72:1195-1204. [DOI: 10.1007/s00228-016-2094-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 07/04/2016] [Indexed: 10/21/2022]
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The challenge for predicting bleeding events by assessing platelet reactivity following coronary stenting. Int J Cardiol 2016; 207:128-31. [DOI: 10.1016/j.ijcard.2016.01.102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/02/2016] [Accepted: 01/04/2016] [Indexed: 11/19/2022]
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Intravenous Clopidogrel (MDCO-157) Compared with Oral Clopidogrel: The Randomized Cross-Over AMPHORE Study. Am J Cardiovasc Drugs 2016; 16:43-53. [PMID: 26386578 DOI: 10.1007/s40256-015-0145-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND The extent of P2Y12 inhibition during coronary intervention is an important determinant of ischemic complications. The currently available oral P2Y12 inhibitors are limited by a relatively slow onset of action and variable on-treatment response. OBJECTIVE Our objective was to determine the pharmacodynamic (PD) dose-antiplatelet response relationship and the pharmacokinetics of MDCO-157, an intravenous formulation of clopidogrel complexed with sulphobutylether betacyclodextrin, and to identify the dose level of MDCO-157 that matches the PD effect of oral clopidogrel 300 mg. METHODOLOGY A randomized open-label crossover study was performed in 33 healthy adult volunteers to determine the pharmacokinetic (clopidogrel and clopidogrel H4 thiol active metabolite) and the PD (vasodilator-stimulated phosphoprotein [VASP]) effects of MDCO-157 at doses of 75, 150, and 300 mg and of oral clopidogrel 300 mg. RESULTS Data are presented as %, mean (standard deviation). The maximum effect of P2Y12 receptor inhibition assessed by flow cytometry using VASP was 70.42 (6.7), 69.45 (7.1), and 65.58 (12.6) for intravenous MDCO-157 at doses of 75, 150, and 300 mg, respectively, compared with 56.6 (17.5) with oral clopidogrel 300 mg administration (p < 0.0001). Intravenous administration of MDCO-157 led to a stepwise increase in plasma exposure of clopidogrel, higher than with administration of an oral dose of 300 mg (p < 0.0001). Plasma exposure of H4-thiol also increased with intravenous dose (3.6 ± 2.6, 6.9 ± 4.6, and 12.4 ± 9.1 h·ng/ml for intravenous 75, 150, and 300 mg, respectively) but was lower than with oral administration of a 300-mg dose (34.0 ± 16.0 h.ng/ml; pairwise p < 0.0001). CONCLUSIONS MDCO-157, an intravenous formulation of clopidogrel complexed with sulphobutylether betacyclodextrin, did not show significant platelet inhibition when administered at doses up to 300 mg. Higher doses with longer infusion may be needed to reach a sufficient threshold of active metabolite generation. TRIAL REGISTRATION ClinicalTrials.gov identifier: NCT01860105.
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