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Hart XM, Gründer G, Ansermot N, Conca A, Corruble E, Crettol S, Cumming P, Hefner G, Frajerman A, Howes O, Jukic M, Kim E, Kim S, Manisalco I, Moriguchi S, Müller DJ, Nakajima S, Osugo M, Paulzen M, Ruhe HG, Scherf-Clavel M, Schoretsanitis G, Serretti A, Spina E, Spigset O, Steimer W, Süzen HS, Uchida H, Unterecker S, Vandenberghe F, Verstuyft C, Zernig G, Hiemke C, Eap CB. Optimisation of pharmacotherapy in psychiatry through therapeutic drug monitoring, molecular brain imaging and pharmacogenetic tests: focus on antipsychotics. World J Biol Psychiatry 2024:1-123. [PMID: 38913780 DOI: 10.1080/15622975.2024.2366235] [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] [Received: 11/04/2023] [Accepted: 06/06/2024] [Indexed: 06/26/2024]
Abstract
BACKGROUND For psychotic disorders (i.e. schizophrenia), pharmacotherapy plays a key role in controlling acute and long-term symptoms. To find the optimal individual dose and dosage strategy, specialized tools are used. Three tools have been proven useful to personalize drug treatments: therapeutic drug monitoring (TDM) of drug levels, pharmacogenetic testing (PG), and molecular neuroimaging. METHODS In these Guidelines, we provide an in-depth review of pharmacokinetics, pharmacodynamics, and pharmacogenetics for 50 antipsychotics. Over 30 international experts in psychiatry selected studies that have measured drug concentrations in the blood (TDM), gene polymorphisms of enzymes involved in drug metabolism, or receptor/transporter occupancies in the brain (positron emission tomography (PET)). RESULTS Study results strongly support the use of TDM and the cytochrome P450 (CYP) genotyping and/or phenotyping to guide drug therapies. Evidence-based target ranges are available for titrating drug doses that are often supported by PET findings. CONCLUSION All three tools discussed in these Guidelines are essential for drug treatment. TDM goes well beyond typical indications such as unclear compliance and polypharmacy. Despite its enormous potential to optimize treatment effects, minimize side effects and ultimately reduce the global burden of diseases, personalized drug treatment has not yet become the standard of care in psychiatry.
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Affiliation(s)
- X M Hart
- Central Institute of Mental Health, Department of Molecular Neuroimaging, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - G Gründer
- Central Institute of Mental Health, Department of Molecular Neuroimaging, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
- German Center for Mental Health (DZPG), partner site Mannheim - Heidelberg - Ulm
| | - N Ansermot
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly, Switzerland
| | - A Conca
- Dipartimento di Psichiatria, Comprensorio Sanitario di Bolzano, Bolzano, Italy
| | - E Corruble
- Université Paris-Saclay, AP-HP, Service Hospitalo-Universitaire de Psychiatrie, Hôpital de Bicêtre
- Equipe MOODS, Inserm U1018, CESP (Centre de Recherche en Epidémiologie et Sante des Populations), Le Kremlin-Bicêtre, France
| | - S Crettol
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Centre for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital and University of Lausanne, Prilly, Switzerland
| | - P Cumming
- Department of Nuclear Medicine, Bern University Hospital, Bern, Switzerland
- School of Psychology and Counseling, Queensland University of Technology, Brisbane, Australia
| | - G Hefner
- Vitos Clinic for Forensic Psychiatry, Forensic Psychiatry, Eltville, Germany
| | - A Frajerman
- Université Paris-Saclay, AP-HP, Service Hospitalo-Universitaire de Psychiatrie, Hôpital de Bicêtre
- Equipe MOODS, Inserm U1018, CESP (Centre de Recherche en Epidémiologie et Sante des Populations), Le Kremlin-Bicêtre, France
| | - O Howes
- Department of Psychosis Studies, IoPPN, King's College London, De Crespigny Park, London, SE5 8AF, UK
- Institute of Clinical Sciences (ICS), Faculty of Medicine, Imperial College London, Du Cane Road, London W12 0NN, UK
| | - M Jukic
- Department of Physiology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia and Pharmacogenetics Section, Department of Physiology and Pharmacology, Karolinska Institutet, Solna, Sweden
| | - E Kim
- Department of Psychiatry, Seoul National University College of Medicine, Republic of Korea
| | - S Kim
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Republic of Korea
| | - I Manisalco
- Dipartimento di Psichiatria, Comprensorio Sanitario di Bolzano, Bolzano, Italy
| | - S Moriguchi
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - D J Müller
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University Hospital of Würzburg, Würzburg, Germany
- Pharmacogenetics Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada, and Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - S Nakajima
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - M Osugo
- Department of Psychosis Studies, IoPPN, King's College London, De Crespigny Park, London, SE5 8AF, UK
- Institute of Clinical Sciences (ICS), Faculty of Medicine, Imperial College London, Du Cane Road, London W12 0NN, UK
| | - M Paulzen
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University
- JARA - Translational Brain Medicine, Aachen, Germany; Alexianer Center for Mental Health, Aachen, Germany
| | - H G Ruhe
- Department of psychiatry, Radboudumc, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen, Netherlands
| | - M Scherf-Clavel
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University Hospital of Würzburg, Würzburg, Germany
| | - G Schoretsanitis
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric Hospital, University of Zurich, 8032 Zurich, Switzerland
| | - A Serretti
- Department of Medicine and Surgery, Kore University of Enna, Italy
| | - E Spina
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - O Spigset
- Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway, and Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - W Steimer
- Institute of Clinical Chemistry and Pathobiochemistry, Technical University Munich, Munich, Germany
| | - H S Süzen
- Department of Pharmaceutic Toxicology, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - H Uchida
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - S Unterecker
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University Hospital of Würzburg, Würzburg, Germany
| | - F Vandenberghe
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Centre for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly, Switzerland
| | - C Verstuyft
- Department of Molecular Genetics, Pharmacogenetics and Hormonology Bicêtre University Hospital Paris-Saclay, Assistance Publique-Hôpitaux de Paris, Le Kremlin Bicêtre, F-94275, France
- CESP, MOODS Team, INSERM UMR 1018, Medicine Faculty, Paris-Saclay University, Le Kremlin Bicêtre, France
| | - G Zernig
- Department of Pharmacology, Medical University Innsbruck; Private Practice for Psychotherapy and Court-Certified Witness, Hall in Tirol, Austria
| | - C Hiemke
- Department of Psychiatry and Psychotherapy and Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center of Mainz, Germany
| | - C B Eap
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Department of Psychiatry, Centre for Psychiatric Neuroscience, Lausanne University Hospital, University of Lausanne, 1008 Prilly, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
- Center for Research and Innovation in Clinical Pharmaceutical Sciences, University of Lausanne, Lausanne, Switzerland
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, University of Lausanne, Lausanne, Switzerland
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Liu T, Gao P, Xie C, Zhang H, Shi Z, Chen R. Study on the daily dose and serum concentration of clozapine in psychiatric patients and possible influencing factors of serum concentration. BMC Psychiatry 2023; 23:596. [PMID: 37582705 PMCID: PMC10428656 DOI: 10.1186/s12888-023-05078-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 08/02/2023] [Indexed: 08/17/2023] Open
Abstract
BACKGROUND Clozapine is the most effective drug for treatment-resistant schizophrenia, and the dosage and concentration of clozapine in the treatment of mental illness vary greatly in different populations and are affected by many factors. METHODS The serum clozapine concentration of 3734 psychiatric patients was detected, and data on daily dose, sex, age and other medical records were collected for statistical analysis. RESULTS The mean daily dose, mean serum concentration and mean C/D (concentration/dose) ratio of clozapine were 191.02 ± 113.47 mg/day, 326.15 ± 235.66 ng/mL and 1.94 ± 1.25 ng/mL per mg/day, respectively. There was difference in daily dose between sexes, and females had higher daily dose (p <0.01), higher serum clozapine concentrations (p < 0.01) and higher C/D ratios (p < 0.01). There were significant differences in daily dose (p < 0.001), serum drug concentration (p < 0.001) and C/D ratio (p < 0.001) among different age groups. The daily dose decreased with age (p for trend < 0.001), and the C/D ratio increased with age (p for trend < 0.001). Inpatients and outpatients had no difference in daily dose, but inpatients had higher serum concentration (p < 0.001) and C/D ratio (p < 0.001). There was no difference in daily dose among different occupations, but there were significant differences in serum concentration (p < 0.001) and C/D ratio (p < 0.001), and unemployed patients may have higher serum concentration and C/D ratio. Duration of disease, comorbidity, marital status, and psychotic type may influence the daily dose and serum concentration. CONCLUSIONS The effective daily dose and serum concentration of clozapine in the study area may be lower than recommended levels, and women have higher serum concentrations and slower metabolic rates. With increasing age, the daily dose decreases, and the metabolic rate slows. Inpatient status and occupation of patients may influence the serum concentration and metabolic rate of clozapine.
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Affiliation(s)
- Taixiu Liu
- Department of Clinical Laboratory, Shandong Daizhuang Hospital, Jining, 272051, China
| | - Peng Gao
- Department of Clinical Laboratory, Shandong Daizhuang Hospital, Jining, 272051, China.
| | - Chuange Xie
- Department of Clinical Laboratory, Shandong Daizhuang Hospital, Jining, 272051, China
| | - Heng Zhang
- Department of Clinical Laboratory, Shandong Daizhuang Hospital, Jining, 272051, China
| | - Zheng Shi
- Department of Clinical Laboratory, Shandong Daizhuang Hospital, Jining, 272051, China
| | - Ruirui Chen
- Department of Clinical Laboratory, Shandong Daizhuang Hospital, Jining, 272051, China
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Personalizing atomoxetine dosing in children with ADHD: what can we learn from current supporting evidence. Eur J Clin Pharmacol 2023; 79:349-370. [PMID: 36645468 DOI: 10.1007/s00228-022-03449-1] [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: 08/24/2022] [Accepted: 12/20/2022] [Indexed: 01/17/2023]
Abstract
PURPOSE There is marked heterogeneity in treatment response of atomoxetine in patients with attention deficit/hyperactivity disorder (ADHD), especially for the pediatric population. This review aims to evaluate current evidence to characterize the dose-exposure relationship, establish clinically relevant metrics for systemic exposure to atomoxetine, define a therapeutic exposure range, and to provide a dose-adaptation strategy before implementing personalized dosing for atomoxetine in children with ADHD. METHODS A comprehensive search was performed across electronic databases (PubMed and Embase) covering the period of January 1, 1985 to July 10, 2022, to summarize recent advances in the pharmacokinetics, pharmacogenomics/pharmacogenetics (PGx), therapeutic drug monitoring (TDM), physiologically based pharmacokinetics (PBPK), and population pharmacokinetics (PPK) of atomoxetine in children with ADHD. RESULTS Some factors affecting the pharmacokinetics of atomoxetine were summarized, including food, CYP2D6 and CYP2C19 phenotypes, and drug‒drug interactions (DDIs). The association between treatment response and genetic polymorphisms of genes encoding pharmacological targets, such as norepinephrine transporter (NET/SLC6A2) and dopamine β hydroxylase (DBH), was also discussed. Based on well-developed and validated assays for monitoring plasma concentrations of atomoxetine, the therapeutic reference range in pediatric patients with ADHD proposed by several studies was summarized. However, supporting evidence on the relationship between systemic atomoxetine exposure levels and clinical response was far from sufficient. CONCLUSION Personalizing atomoxetine dosage may be even more complex than anticipated thus far, but elucidating the best way to tailor the non-stimulant to a patient's individual need will be achieved by combining two strategies: detailed research in linking the pharmacokinetics and pharmacodynamics in pediatric patients, and better understanding in nature and causes of ADHD, as well as environmental stressors.
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Yang S, Zhang YF, Lu SJ, Ye ZQ, Lai JB, Li L, Yang X, Wang DD, Zhang PF, Wu LL, Huang HM, Gao XL, Wu M, Pan YM, Chen YQ, Zhang DH, Geng YM, Zhao QW, Hu SH. Relationship between serum concentration and clinical response of quetiapine in adolescents and adults with bipolar disorders in acute stage: a prospective observational study. J Affect Disord 2023; 324:199-205. [PMID: 36586603 DOI: 10.1016/j.jad.2022.12.107] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 08/30/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022]
Abstract
BACKGROUND It is found that there are great differences in the efficacy of quetiapine at the same dose in many patients with bipolar disorders. Therefore, therapeutic drug monitoring (TDM) is a valuable tool for guiding treatment with quetiapine. The aims of this study were to assess the relationship between serum concentration and clinical response of quetiapine in adolescents and adults with bipolar disorders in acute stage. METHODS The study design was prospective and observational. Within the naturalistic setting of a routine TDM service at the First Affiliated Hospital, Zhejiang University School of Medicine. Psychiatric symptoms were assessed using the HAMD (Hamilton Depression Scale), YRMS (Young manic rating scale) and CUDOS-M (Clinically Useful Depression Outcome Scale-Mixed Subscale). The decline of HAMD and YMRS scores was were used to assess clinical outcome of bipolar disorders respectively. RESULTS 169 inpatients (23.7 % male, 76.3 % female) were enrolled in the study. We found that there was a strong correlation between quetiapine serum concentrations and clinical outcomes (rs = 0.702, p < 0.001). While, quetiapine daily dose was not correlated with clinical outcome. We found that when the quetiapine serum level is >146.85 ng/ml in depression episodes patients could obtain a satisfactory treatment effect after 2 weeks of hospitalization. CONCLUSIONS We found a significant positive relationship between serum concentration and clinical outcome, and also determined the serum concentration of quetiapine for the treatment of bipolar depression.
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Affiliation(s)
- Si Yang
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
| | - Yan-Fang Zhang
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
| | - Shao-Jia Lu
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China; The Key Laboratory of Mental Disorder's Management of Zhejiang Province, Zhejiang Engineering Center for Mathematical Mental Health, Hangzhou 310003, China; Brain Research Institute of Zhejiang University, Hangzhou 310003, China
| | - Zi-Qi Ye
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Jian-Bo Lai
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China; The Key Laboratory of Mental Disorder's Management of Zhejiang Province, Zhejiang Engineering Center for Mathematical Mental Health, Hangzhou 310003, China; Brain Research Institute of Zhejiang University, Hangzhou 310003, China
| | - Lu Li
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Xi Yang
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Dan-Dan Wang
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China; The Key Laboratory of Mental Disorder's Management of Zhejiang Province, Zhejiang Engineering Center for Mathematical Mental Health, Hangzhou 310003, China; Brain Research Institute of Zhejiang University, Hangzhou 310003, China
| | - Pei-Fen Zhang
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Ling-Ling Wu
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Hui-Min Huang
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Xing-Le Gao
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Mian Wu
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Yan-Meng Pan
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Yi-Qing Chen
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Dan-Hua Zhang
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Yi-Meng Geng
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Qing-Wei Zhao
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
| | - Shao-Hua Hu
- Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China; The Key Laboratory of Mental Disorder's Management of Zhejiang Province, Zhejiang Engineering Center for Mathematical Mental Health, Hangzhou 310003, China; Brain Research Institute of Zhejiang University, Hangzhou 310003, China.
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Simple and Robust Detection of CYP2D6 Gene Deletions and Duplications Using CYP2D8P as Reference. Pharmaceuticals (Basel) 2022; 15:ph15020166. [PMID: 35215279 PMCID: PMC8880347 DOI: 10.3390/ph15020166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/23/2022] [Accepted: 01/27/2022] [Indexed: 12/04/2022] Open
Abstract
Genotyping of the CYP2D6 gene is the most commonly applied pharmacogenetic test globally. Significant economic interests have led to the development of a plurality of assays, available for almost any genotyping platform or DNA detection chemistry. Of all the genetic variants, copy number variations are particular difficult to detect by polymerase chain reaction. Here, we present two simple novel approaches for the identification of samples carrying either deletions or duplications of the CYP2D6 gene; by relative quantification using a singleplex 5′nuclease real-time PCR assay, and by high-resolution melting of PCR products. These methods make use of universal primers, targeting both the CYP2D6 and the reference gene CYP2D8P, which is necessary for the analysis. The assays were validated against a reference method using a large set of samples. The singleplex nature of the 5′nuclease real-time PCR ensures that the primers anneal with equal affinity to both the sequence of the CYP2D6 and the reference gene. This facilitates robust identification of gene deletions and duplications based on the cycle threshold value. In contrast, the high-resolution melting assay is an end-point PCR, where the identification relies on variations between the amount of product generated from each of the two genes.
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Role of Drug-Gene Interactions and Pharmacogenetics in Simvastatin-Associated Pulmonary Toxicity. Drug Saf 2021; 44:1179-1191. [PMID: 34606062 PMCID: PMC8553720 DOI: 10.1007/s40264-021-01105-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/28/2021] [Indexed: 11/05/2022]
Abstract
Introduction Simvastatin has previously been associated with drug-induced interstitial lung disease. In this retrospective observational study, cases with non-specific interstitial pneumonia (NSIP) or idiopathic pulmonary fibrosis (IPF) with simvastatin-associated pulmonary toxicity (n = 34) were evaluated. Objective To identify whether variations in genes encoding cytochrome P450 (CYP) enzymes or in the SLCO1B1 gene (Solute Carrier Organic anion transporting polypeptide 1B1 gene, encoding the organic anion transporting polypeptide 1B1 [OATP1B1] drug transporter enzyme), and/or characteristics of concomitantly used drugs, predispose patients to simvastatin-associated pulmonary toxicity. Methods Characteristics of concomitantly used drugs and/or variations in the CYP or SLCO1B1 genes and drug–gene interactions were assessed. The outcome after withdrawal of simvastatin and/or switch to another statin was assessed after 6 months. Results Multiple drug use involving either substrates and/or inhibitors of CYP3A4 and/or three or more drugs with the potential to cause acidosis explained the simvastatin-associated toxicity in 70.5% (n = 24) of cases. Cases did not differ significantly from controls regarding CYP3A4, CYP2C9, or OATP1B1 phenotypes, and genetic variation explained only 20.6% (n = 7) of cases. Withdrawal of simvastatin without switching to another statin or with a switch to a hydrophilic statin led to improvement or stabilization in all NSIP cases, whereas all cases who were switched to the lipophilic atorvastatin progressed. Conclusion Simvastatin-associated pulmonary toxicity is multifactorial. For patients with this drug-induced pulmonary toxicity who need to continue taking a statin, switching to a hydrophilic statin should be considered. ClinicalTrials.gov identifier NCT00267800, registered in 2005. Supplementary Information The online version contains supplementary material available at 10.1007/s40264-021-01105-8.
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Eap CB, Gründer G, Baumann P, Ansermot N, Conca A, Corruble E, Crettol S, Dahl ML, de Leon J, Greiner C, Howes O, Kim E, Lanzenberger R, Meyer JH, Moessner R, Mulder H, Müller DJ, Reis M, Riederer P, Ruhe HG, Spigset O, Spina E, Stegman B, Steimer W, Stingl J, Suzen S, Uchida H, Unterecker S, Vandenberghe F, Hiemke C. Tools for optimising pharmacotherapy in psychiatry (therapeutic drug monitoring, molecular brain imaging and pharmacogenetic tests): focus on antidepressants. World J Biol Psychiatry 2021; 22:561-628. [PMID: 33977870 DOI: 10.1080/15622975.2021.1878427] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Objectives: More than 40 drugs are available to treat affective disorders. Individual selection of the optimal drug and dose is required to attain the highest possible efficacy and acceptable tolerability for every patient.Methods: This review, which includes more than 500 articles selected by 30 experts, combines relevant knowledge on studies investigating the pharmacokinetics, pharmacodynamics and pharmacogenetics of 33 antidepressant drugs and of 4 drugs approved for augmentation in cases of insufficient response to antidepressant monotherapy. Such studies typically measure drug concentrations in blood (i.e. therapeutic drug monitoring) and genotype relevant genetic polymorphisms of enzymes, transporters or receptors involved in drug metabolism or mechanism of action. Imaging studies, primarily positron emission tomography that relates drug concentrations in blood and radioligand binding, are considered to quantify target structure occupancy by the antidepressant drugs in vivo. Results: Evidence is given that in vivo imaging, therapeutic drug monitoring and genotyping and/or phenotyping of drug metabolising enzymes should be an integral part in the development of any new antidepressant drug.Conclusions: To guide antidepressant drug therapy in everyday practice, there are multiple indications such as uncertain adherence, polypharmacy, nonresponse and/or adverse reactions under therapeutically recommended doses, where therapeutic drug monitoring and cytochrome P450 genotyping and/or phenotyping should be applied as valid tools of precision medicine.
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Affiliation(s)
- C B Eap
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Center for Psychiatric Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.,Center for Research and Innovation in Clinical Pharmaceutical Sciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.,School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Lausanne, Switzerland, Geneva, Switzerland
| | - G Gründer
- Department of Molecular Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - P Baumann
- Department of Psychiatry, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - N Ansermot
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Center for Psychiatric Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - A Conca
- Department of Psychiatry, Health Service District Bolzano, Bolzano, Italy.,Department of Child and Adolescent Psychiatry, South Tyrolean Regional Health Service, Bolzano, Italy
| | - E Corruble
- INSERM CESP, Team ≪MOODS≫, Service Hospitalo-Universitaire de Psychiatrie, Universite Paris Saclay, Le Kremlin Bicetre, France.,Service Hospitalo-Universitaire de Psychiatrie, Hôpital Bicêtre, Assistance Publique Hôpitaux de Paris, Le Kremlin Bicêtre, France
| | - S Crettol
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Center for Psychiatric Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - M L Dahl
- Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - J de Leon
- Eastern State Hospital, University of Kentucky Mental Health Research Center, Lexington, KY, USA
| | - C Greiner
- Bundesinstitut für Arzneimittel und Medizinprodukte, Bonn, Germany
| | - O Howes
- King's College London and MRC London Institute of Medical Sciences (LMS)-Imperial College, London, UK
| | - E Kim
- Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, South Korea.,Department of Psychiatry, Seoul National University College of Medicine, Seoul, South Korea
| | - R Lanzenberger
- Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria
| | - J H Meyer
- Campbell Family Mental Health Research Institute, CAMH and Department of Psychiatry, University of Toronto, Toronto, Canada
| | - R Moessner
- Department of Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany
| | - H Mulder
- Department of Clinical Pharmacy, Wilhelmina Hospital Assen, Assen, The Netherlands.,GGZ Drenthe Mental Health Services Drenthe, Assen, The Netherlands.,Department of Pharmacotherapy, Epidemiology and Economics, Department of Pharmacy and Pharmaceutical Sciences, University of Groningen, Groningen, The Netherlands.,Department of Psychiatry, Interdisciplinary Centre for Psychopathology and Emotion Regulation, University of Groningen, Groningen, The Netherlands
| | - D J Müller
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada.,Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - M Reis
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.,Clinical Chemistry and Pharmacology, Skåne University Hospital, Lund, Sweden
| | - P Riederer
- Center of Mental Health, Clinic and Policlinic for Psychiatry, Psychosomatics and Psychotherapy, University Hospital Würzburg, Würzburg, Germany.,Department of Psychiatry, University of Southern Denmark Odense, Odense, Denmark
| | - H G Ruhe
- Department of Psychiatry, Radboudumc, Nijmegen, the Netherlands.,Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen, Netherlands
| | - O Spigset
- Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway.,Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - E Spina
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - B Stegman
- Institut für Pharmazie der Universität Regensburg, Regensburg, Germany
| | - W Steimer
- Institute for Clinical Chemistry and Pathobiochemistry, Technical University of Munich, Munich, Germany
| | - J Stingl
- Institute for Clinical Pharmacology, University Hospital of RWTH Aachen, Germany
| | - S Suzen
- Department of Toxicology, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - H Uchida
- Department of Neuropsychiatry, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - S Unterecker
- Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Würzburg, Germany
| | - F Vandenberghe
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Center for Psychiatric Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - C Hiemke
- Department of Psychiatry and Psychotherapy, University Medical Center Mainz, Mainz, Germany
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8
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Li C, Ye Z, Xu Y, Bell SEJ. An overview of therapeutic anticancer drug monitoring based on surface enhanced (resonance) Raman spectroscopy (SE(R)RS). Analyst 2021; 145:6211-6221. [PMID: 32794527 DOI: 10.1039/d0an00891e] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Therapeutic drug monitoring (TDM) is important for many therapeutic regimens and has particular relevance for anticancer drugs which often have serious effects and whose optimum dosage can vary significantly between different patients. Many of the features of surface enhanced (resonance) Raman spectroscopy (SE(R)RS) suggest it should be very suitable for TDM of anticancer drugs and some initial studies which explore the potential of SE(R)RS for TDM of anticancer drugs have been published. This review brings this work together in an attempt to draw some general observations about key aspects of the approach, including the nature of the substrate used, matrix interference effects and factors governing adsorption of the target molecules onto the enhancing surface. There is now sufficient evidence to suggest that none of these pose real difficulties in the context of TDM. However, some issues, particularly the need to carry out multiplex measurements for TDM of combination therapies, have yet to be addressed.
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Affiliation(s)
- Chunchun Li
- School of Chemistry and Chemical Engineering, Queen's University Belfast, University Road, Belfast, BT7 1NN, UK.
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Baldelli S, Cheli S, Montrasio C, Cattaneo D, Clementi E. Therapeutic drug monitoring and pharmacogenetics of antipsychotics and antidepressants in real life settings: A 5-year single centre experience. World J Biol Psychiatry 2021; 22:34-45. [PMID: 32212950 DOI: 10.1080/15622975.2020.1747112] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Exposure and clinical response to CNS drugs are largely variable. AGNP guidelines suggest therapy individualisation with therapeutic drug monitoring of plasma concentrations and pharmacogenetic testing. We present the retrospective analysis of the last 5 years' data collected in real life settings as indirect evidence of the applications of the AGNP guidelines in the routine clinical management of psychiatric patients requiring pharmacologic treatments. METHODS Plasma concentrations were quantified using a liquid chromatography/tandem mass spectrometry method. Genomic DNA was isolated using an automatic DNA extraction system. All genotypes were determined by Real-Time PCR. RESULTS We collected a total of 4582 requests for TDM and 212 requests for pharmacogenetic analysis. A wide distribution in the trough concentrations was observed for most drugs indicating a high interpatient variability. Nearly 45% of the samples had trough levels below the minimum effective drug concentrations set by the AGNP guidelines; only 8% of the samples had high concentrations. For pharmacogenetics analysis, among antipsychotics, clozapine, haloperidol and aripiprazole were the most requested (78%); while for antidepressants SSRIs were the most frequently prescribed. CONCLUSIONS These data suggest that physicians are becoming more confident with the laboratory pharmacologic tools to optimise treatments and/or that the pharmacological treatment of patients with psychiatric disorders is becoming more challenging. TDM and PGx might significantly contribute to the rational selection of the best drug and best dose in individual cases.
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Affiliation(s)
- Sara Baldelli
- Unit of Clinical Pharmacology, ASST Fatebenefratelli Sacco University Hospital, Milan, Italy
| | - Stefania Cheli
- Unit of Clinical Pharmacology, ASST Fatebenefratelli Sacco University Hospital, Milan, Italy
| | - Cristina Montrasio
- Unit of Clinical Pharmacology, ASST Fatebenefratelli Sacco University Hospital, Milan, Italy
| | - Dario Cattaneo
- Unit of Clinical Pharmacology, ASST Fatebenefratelli Sacco University Hospital, Milan, Italy
| | - Emilio Clementi
- Clinical Pharmacology Unit, Consiglio Nazionale delle Ricerche Institute of Neuroscience, Department of Biomedical and Clinical Sciences L, Sacco University Hospital, Università degli Studi di Milano, Milan, Italy.,Eugenio Medea Scientific Institute, Bosisio Parini, Italy
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Abstract
Over the years, numerous studies have supported the premise that individuals possessing the "slow acetylator" phenotype are more at risk from developing drug side-effects. Most prominent amongst these reports are those concerned with hepatotoxicity and peripheral neuropathy following treatment with isoniazid, lupus-like symptoms during procainamide therapy and experiencing hypersensitivity reactions to the various sulphonamide derivatives. Similarly, "slow acetylators" undergoing heavy exposure to arylamines and related carcinogens are more likely to develop bladder cancer. Contrariwise, there appears a slight risk of "rapid acetylators" developing pancreatic tumours.Other therapeutic agents for which polymorphic N-acetylation plays a minor role in their metabolism have been investigated but any impact of this metabolic difference on clinical efficacy or associated toxicity is still under question. In the search for clues as to the underlying aetiology, patient groups with many disease states have been examined for association with differences in N-acetylation and the majority have provided data that could be interpreted as equivocal. Studies have given contradictory, often opposing, results, calculated risk factors that are (perhaps) just significant but certainly not high, and patients within the cohorts who are always exceptions. Undoubtedly, other as yet unappreciated factors are at play.
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Affiliation(s)
- Stephen C Mitchell
- Section of Computational and Systems Medicine, Faculty of Medicine, Imperial College London, London, UK
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Li KW, Yen YK. Gentamicin drug monitoring for peritonitis patients by using a CMOS-BioMEMS-based microcantilever sensor. Biosens Bioelectron 2018; 130:420-426. [PMID: 30220446 DOI: 10.1016/j.bios.2018.09.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/23/2018] [Accepted: 09/03/2018] [Indexed: 11/24/2022]
Abstract
We developed a Complementary Metal-Oxide-Semiconductor Bio-Microelectromechanical Systems (CMOS-BioMEMS) based piezoresistive microcantilever sensor for detecting gentamicin, a peritonitis therapeutic small-molecule drug. In recent years, the patient-centric concept has been emphasized. In such a trend, therapeutic drug monitoring (TDM) is especially crucial for patients with peritonitis to avoid adverse reactions from a high concentration of gentamicin in the blood. With the aid of a commercialized semiconductor manufacturing process, the microcantilever sensing platform can serve as a portable, low-cost device and offer real-time detection. With chemical surface modification and capture antibody immobilization, the sensor can detect the small-molecule (< 2 kDa) gentamicin directly. We also modified the pH value of the buffer solution and applied an external electric field to promote sensor sensitivity. Comparing the change of the signals in a non-electric field of antibody immobilization and a 60-volt electric field of antibody immobilization showed that the average signal response increased 1.8 times. In the detection of gentamicin with different concentrations of 10-200 μg/mL, the limit of detection (LOD) of the sensor was 9.44 µg/mL. Finally, the detecting result of a microrcantilever sensor was compared with the one measured by a common instrument in hospital, and the high correlation was expressed between them in gentamicin detection. The CMOS-BioMEMS-based piezoresistive microcantilever sensor has been demonstrated to have great potential as a point-of-care (POC) device for real-time drug concentration monitoring.
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Affiliation(s)
- Kuan-Wei Li
- Institute of Applied Mechanics, National Taiwan University, Taipei 106, Taiwan
| | - Yi-Kuang Yen
- Department of Mechanical Engineering, National Taipei University of Technology, Taipei 106, Taiwan.
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12
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Schoretsanitis G, Paulzen M, Unterecker S, Schwarz M, Conca A, Zernig G, Gründer G, Haen E, Baumann P, Bergemann N, Clement HW, Domschke K, Eckermann G, Egberts K, Gerlach M, Greiner C, Havemann-Reinecke U, Hefner G, Helmer R, Janssen G, Jaquenoud-Sirot E, Laux G, Messer T, Mössner R, Müller MJ, Pfuhlmann B, Riederer P, Saria A, Schoppek B, Silva Gracia M, Stegmann B, Steimer W, Stingl JC, Uhr M, Ulrich S, Waschgler R, Zurek G, Hiemke C. TDM in psychiatry and neurology: A comprehensive summary of the consensus guidelines for therapeutic drug monitoring in neuropsychopharmacology, update 2017; a tool for clinicians<sup/>. World J Biol Psychiatry 2018; 19:162-174. [PMID: 29493375 DOI: 10.1080/15622975.2018.1439595] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
OBJECTIVES Therapeutic drug monitoring (TDM) combines the quantification of drug concentrations in blood, pharmacological interpretation and treatment guidance. TDM introduces a precision medicine tool in times of increasing awareness of the need for personalized treatment. In neurology and psychiatry, TDM can guide pharmacotherapy for patient subgroups such as children, adolescents, pregnant women, elderly patients, patients with intellectual disabilities, patients with substance use disorders, individuals with pharmacokinetic peculiarities and forensic patients. Clear indications for TDM include lack of clinical response in the therapeutic dose range, assessment of drug adherence, tolerability issues and drug-drug interactions. METHODS Based upon existing literature, recommended therapeutic reference ranges, laboratory alert levels, and levels of recommendation to use TDM for dosage optimization without specific indications, conversion factors, factors for calculation of dose-related drug concentrations and metabolite-to-parent ratios were calculated. RESULTS This summary of the updated consensus guidelines by the TDM task force of the Arbeitsgemeinschaft für Neuropsychopharmakologie und Pharmakopsychiatrie offers the practical and theoretical knowledge for the integration of TDM as part of pharmacotherapy with neuropsychiatric agents into clinical routine. CONCLUSIONS The present guidelines for TDM application for neuropsychiatric agents aim to assist clinicians in enhancing safety and efficacy of treatment.
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Affiliation(s)
- Georgios Schoretsanitis
- a Department of Psychiatry , University of Bern , Bern , Switzerland.,b Department of Psychiatry, Psychotherapy and Psychosomatics , RWTH Aachen University, JARA - Translational Brain Medicine , Aachen , Germany
| | - Michael Paulzen
- b Department of Psychiatry, Psychotherapy and Psychosomatics , RWTH Aachen University, JARA - Translational Brain Medicine , Aachen , Germany.,c Alexianer Hospital Aachen , Aachen , Germany
| | - Stefan Unterecker
- d Department of Psychiatry, Psychosomatics and Psychotherapy , University Hospital of Würzburg , Germany
| | - Markus Schwarz
- e Department of Laboratory Medicine , Ludwig Maximilian University , Munich , Germany
| | - Andreas Conca
- f Servizio Psichiatrico del Comprensorio Sanitario di Bolzano , Bolzano , Italy
| | - Gerald Zernig
- g Experimental Psychiatry Unit, Department of Psychiatry and Psychotherapy , Medical University of Innsbruck , Innsbruck , Austria.,h Private Practice for Psychotherapy and Court-Certified Witness , Hall in Tirol , Austria
| | - Gerhard Gründer
- i Department of Molecular Neuroimaging , Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg , Mannheim , Germany
| | - Ekkerhard Haen
- j Clinical Pharmacology, Department of Psychiatry and Psychotherapy and Department of Pharmacology and Toxicology , University of Regensburg , Regensburg , Germany
| | - Pierre Baumann
- k Department of Psychiatry , University of Lausanne , Lausanne , Switzerland
| | - Niels Bergemann
- l Kitzberg Hospitals, Center for Psychosomatic Medicine and Psychotherapy , Bad Mergentheim , Germany
| | - Hans Willi Clement
- m Department of Child and Adolescent Psychiatry , University of Freiburg , Freiburg , Germany
| | - Katharina Domschke
- n Department of Psychiatry and Psychotherapy , Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg , Freiburg , Germany
| | | | - Karin Egberts
- p Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy , Center of Mental Health, University Hospital of Würzburg , Germany
| | - Manfred Gerlach
- p Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy , Center of Mental Health, University Hospital of Würzburg , Germany
| | - Christine Greiner
- q Federal Institute for Drugs and Medical Devices (BfArM) , Bonn , Germany
| | | | - Gudrun Hefner
- s Psychiatric Hospital, Vitos Klinik Hochtaunus , Friedrichsdorf , Germany
| | | | - Ger Janssen
- u Medical Laboratory Stein , Limbach Group , Mönchengladbach , Germany
| | | | - Gerd Laux
- w Institute of Psychological Medicine , Haag in Oberbayern , Germany
| | - Thomas Messer
- x Danuviuskliniken, Psychiatric Hospital , Pfaffenhofen , Germany
| | - Rainald Mössner
- y Department of Psychiatry and Psychotherapy , University of Tübingen , Tübingen , Germany
| | | | | | - Peter Riederer
- d Department of Psychiatry, Psychosomatics and Psychotherapy , University Hospital of Würzburg , Germany
| | - Alois Saria
- g Experimental Psychiatry Unit, Department of Psychiatry and Psychotherapy , Medical University of Innsbruck , Innsbruck , Austria
| | - Bernd Schoppek
- ab kbo-Isar-Amper Klinikum München-Ost, Psychiatric Hospital , Munich , Germany
| | - Margarete Silva Gracia
- j Clinical Pharmacology, Department of Psychiatry and Psychotherapy and Department of Pharmacology and Toxicology , University of Regensburg , Regensburg , Germany
| | - Benedikt Stegmann
- j Clinical Pharmacology, Department of Psychiatry and Psychotherapy and Department of Pharmacology and Toxicology , University of Regensburg , Regensburg , Germany
| | - Werner Steimer
- ac Institute of Clinical Chemistry and Pathobiochemistry, Technical University Munich , Munich , Germany
| | - Julia C Stingl
- q Federal Institute for Drugs and Medical Devices (BfArM) , Bonn , Germany
| | - Manfred Uhr
- ad Max Planck Institute of Psychiatry , Munich , Germany
| | | | | | | | - Christoph Hiemke
- ah Department of Psychiatry and Psychotherapy , University Medical Center of Mainz , Mainz , Germany.,ai Institute of Clinical Chemistry and Laboratory Medicine , University Medical Center of Mainz , Mainz , Germany
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Eap CB. Personalized prescribing: a new medical model for clinical implementation of psychotropic drugs. DIALOGUES IN CLINICAL NEUROSCIENCE 2017. [PMID: 27757065 PMCID: PMC5067148 DOI: 10.31887/dcns.2016.18.3/ceap] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The use of pharmacogenetic tests was already being proposed in psychiatry in the early 2000s because genetic factors were known to influence drug pharmacokinetics and pharmacodynamics. However, sufficient levels of evidence to justify routine use have been achieved for only a few tests (eg, major histocompatibility complex, class I, B, allele 1502 [HLA-B*1502] for carbamazepine in epilepsy and bipolar disorders); many findings are too preliminary or, when replicated, of low clinical relevance because of a small effect size. Although drug selection and dose adaptation according to cytochrome P450 genotypes are sound, a large number of patients need to be genotyped in order to prevent one case of severe side effect and/or nonresponse. The decrease in cost for genetic analysis shifts the cost: benefit ratio toward increasing use of pharmacogenetic tests. However, they have to be combined with careful clinical evaluations and other tools (eg, therapeutic drug monitoring and phenotyping) to contribute to the general aim of providing the best care for psychiatric patients.
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Affiliation(s)
- Chin B Eap
- Unit of Pharmacogenetics and Clinical Psychopharmacology, Centre for Psychiatric Neurosciences, Department of Psychiatry, Lausanne University Hospital, Prilly, Switzerland; School of Pharmacy, Department of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
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14
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Quaranta S, Dupouey J, Colle R, Verstuyft C. Pharmacogénétique des médicaments antidépresseurs : état des connaissances et des pratiques – recommandations du Réseau national de pharmacogénétique (RNPGx). Therapie 2017; 72:301-309. [DOI: 10.1016/j.therap.2016.09.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 09/02/2016] [Indexed: 11/27/2022]
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15
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Quaranta S, Dupouey J, Colle R, Verstuyft C. Pharmacogenetics of antidepressant drugs: State of the art and clinical implementation – recommendations from the French National Network of Pharmacogenetics. Therapie 2017; 72:311-318. [DOI: 10.1016/j.therap.2016.09.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 09/02/2016] [Indexed: 01/29/2023]
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16
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Schütze G, Schwarz MJ. Therapeutic Drug Monitoring for individualised risk reduction in psychopharmacotherapy. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.05.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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17
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Stegemann S. The future of pharmaceutical manufacturing in the context of the scientific, social, technological and economic evolution. Eur J Pharm Sci 2016; 90:8-13. [DOI: 10.1016/j.ejps.2015.11.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 10/10/2015] [Accepted: 11/01/2015] [Indexed: 12/17/2022]
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18
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Litti L, Amendola V, Toffoli G, Meneghetti M. Detection of low-quantity anticancer drugs by surface-enhanced Raman scattering. Anal Bioanal Chem 2016; 408:2123-31. [DOI: 10.1007/s00216-016-9315-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/27/2015] [Accepted: 01/05/2016] [Indexed: 01/12/2023]
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Hamidi S, Jouyban A. Pre-Concentration Approaches Combined with Capillary Electrophoresis in Bioanalysis of Chiral Cardiovascular Drugs. PHARMACEUTICAL SCIENCES 2015. [DOI: 10.15171/ps.2015.42] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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20
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Current advances in biosampling for therapeutic drug monitoring of psychiatric CNS drugs. Bioanalysis 2015; 7:1925-42. [DOI: 10.4155/bio.15.123] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Many CNS drugs are effective for the treatment of psychiatric disorders. Psychotropic drugs work differently, thus clinical outcomes for many patients may be insufficient. For this reason it could be useful the measurement of drug levels for clinical decision-making. Analytical goals in therapeutic drug monitoring (TDM) should be established by selecting the appropriate biological matrix. The aim of this review is to highlight the usefulness of TDM for antiepileptics, antidepressants and antipsychotics, with a focus on current advances in biosampling. The literature on TDM was reviewed up to March 2015. An overview on the use of alternative biological matrices is provided to address the current issues and advances in the field of biosampling for psychiatric CNS drug TDM.
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Eryılmaz G, Hızlı Sayar G, Gül IG, Noyan CO, Özten E, Darçın AE, Yorbik Ö, Dilbaz N. Therapeutic drug monitoring: perspectives of psychiatrists in Turkey. Int J Psychiatry Clin Pract 2015; 19:60-4. [PMID: 25363201 DOI: 10.3109/13651501.2014.981542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Although the medical and economic implications of therapeutic drug monitoring have been intensely discussed over the past years, little is known about the experiences and attitudes of psychiatrists in their clinical practice. The aim of this study was to investigate psychiatrists' daily practice with therapeutic drug monitoring in Turkey. METHODS A nation-wide cross-sectional survey among adult and child psychiatry specialist psychiatrists in Turkey was conducted. RESULTS We found that 98.4% (n = 380) of the study participants used TDM in clinical practice and 1.6% (n = 6) did not. However, TDM use is limited to mood stabilizers (lithium 96.3%, valproate 97.6%) to a great extent. Only a small number of psychiatrists perform TDM for other psychotropic drugs, e.g., clozapine 2.4%, tricyclic antidepressants 1.3%, benzodiazepines 1.1%, and selective serotonin reuptake inhibitors 0,8%. CONCLUSIONS Most of the psychiatrists in Turkey have a positive attitude toward use of therapeutic drug monitoring although there is also a considerable difficulty to reach services for the therapeutic drug monitoring of psychotropics other than mood stabilizers.
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Affiliation(s)
- Gul Eryılmaz
- Uskudar University Neuropsychiatry Hospital, Psychiatry , Istanbul , Turkey
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22
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Huang LS, Pheanpanitporn Y, Yen YK, Chang KF, Lin LY, Lai DM. Detection of the antiepileptic drug phenytoin using a single free-standing piezoresistive microcantilever for therapeutic drug monitoring. Biosens Bioelectron 2014; 59:233-8. [DOI: 10.1016/j.bios.2014.03.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 03/17/2014] [Accepted: 03/24/2014] [Indexed: 11/27/2022]
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23
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Awada Z, Zgheib NK. Pharmacogenovigilance: a pharmacogenomics pharmacovigilance program. Pharmacogenomics 2014; 15:845-56. [DOI: 10.2217/pgs.14.44] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
In this report, we review the importance of pharmacovigilance in detecting postmarketing adverse drug events and the potential for developing pharmacogenovigilance programs by integrating pharmacogenomics with pharmacovigilance. We propose to start developing such a program in primary healthcare systems that use basic features of electronic medical records and have access to large numbers of patients commonly prescribed drugs. Such programs, if carefully designed, may grow over time and hopefully enhance the collection and interpretation of useful data for the clinical applications of pharmacogenomics testing.
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Affiliation(s)
- Zeinab Awada
- Biomedical Sciences, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Nathalie Khoueiry Zgheib
- Department of Pharmacology & Toxicology, Faculty of Medicine, American University of Beirut, PO Box 11-0236, Riad El Solh, Beirut 1107 2020, Lebanon
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24
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Issa AM. Clinical applications of pharmacogenomics to adverse drug reactions. Expert Rev Clin Pharmacol 2014; 1:251-60. [DOI: 10.1586/17512433.1.2.251] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Lux R, Wärntges S, Bergner S, Kütting B. [Improvement of medication safety by identification of genetically predisposed subjects. Personalized clinical strategies and regulatory advices]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2013; 56:1545-56. [PMID: 24170084 DOI: 10.1007/s00103-013-1827-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Because adverse drug events (ADEs) have a high socio-economic impact there is an urgent need for effective prevention. In addition to process-related avoidable errors personalised approaches for the prevention of ADEs should also focus on genetic polymorphisms as potential causative agents. AIM Using five case reports as examples therapeutic modalities are described to illustrate the clinical impact of prospective testing aimed at estimating the individual risk of susceptible subjects. MATERIAL AND METHODS The role of the HLA system, the cytochrome P450 family, other metabolic enzymes and transport proteins are described to illustrate the broad range of genetic susceptibility. It is shown, why, when and for whom pretherapeutic tests on genetic polymorphisms are recommended to reduce the risk of ADEs. RESULTS The determination of genetic susceptibility is already implemented in clinical practice prior to (1) carbamazepine therapy in south-east Asians and (2) treatment with abacavir independent of ethnicity. Before prescribing carbamazepine or abacavir, it is recommended that therapeutic decisions be based on these test results. CONCLUSION The broad application of personalised medicine used as an effective tool for minimizing ADE risks is limited by the evidence-based benefit for the patient on the one hand and the costs of the test on the other hand.
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Affiliation(s)
- R Lux
- Bundesinstitut für Arzneimittel und Medizinprodukte (BfArM), Bonn, Deutschland
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26
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Gaeti WP, Obreli-Neto PR, Moliterno RA, Schiavon GB, Cuman RKN. HLA typing in Brazilian boys with aromatic antiepileptic drug-induced DRESS. Int J Clin Pharm 2013; 35:319-22. [DOI: 10.1007/s11096-013-9770-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Accepted: 04/01/2013] [Indexed: 10/27/2022]
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Lorenzi C, Pirovano A, Bosia M. Research Highlights: Highlights from the latest research in mood disorder pharmacogenomics. Pharmacogenomics 2013; 14:127-8. [DOI: 10.2217/pgs.12.200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Cristina Lorenzi
- San Raffaele Scientific Institute, Department of Clinical Neurosciences, Milan, Italy
| | - Adele Pirovano
- San Raffaele Scientific Institute, Department of Clinical Neurosciences, Milan, Italy
- Università Vita-Salute San Raffaele, Department of Clinical Neurosciences, Milan, Italy
| | - Marta Bosia
- San Raffaele Scientific Institute, Department of Clinical Neurosciences, Milan, Italy
- Institute for Advanced Study, IUSS, Center for Neurolinguistics & Theoretical Syntax (NeTS), Pavia, Italy
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28
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Johannessen Landmark C, Johannessen SI, Tomson T. Host factors affecting antiepileptic drug delivery-pharmacokinetic variability. Adv Drug Deliv Rev 2012; 64:896-910. [PMID: 22063021 DOI: 10.1016/j.addr.2011.10.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 10/11/2011] [Accepted: 10/14/2011] [Indexed: 01/16/2023]
Abstract
Antiepileptic drugs (AEDs) are the mainstay in the treatment of epilepsy, one of the most common serious chronic neurological disorders. AEDs display extensive pharmacological variability between and within patients, and a major determinant of differences in response to treatment is pharmacokinetic variability. Host factors affecting AED delivery may be defined as the pharmacokinetic characteristics that determine the AED delivery to the site of action, the epileptic focus. Individual differences may occur in absorption, distribution, metabolism and excretion. These differences can be determined by genetic factors including gender and ethnicity, but the pharmacokinetics of AEDs can also be affected by age, specific physiological states in life, such as pregnancy, or pathological conditions including hepatic and renal insufficiency. Pharmacokinetic interactions with other drugs are another important source of variability in response to AEDs. Pharmacokinetic characteristics of the presently available AEDs are discussed in this review as well as their clinical implications.
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Therapeutic drug monitoring for drugs used in the treatment of substance-related disorders: literature review using a therapeutic drug monitoring appropriateness rating scale. Ther Drug Monit 2012; 33:561-72. [PMID: 21912330 DOI: 10.1097/ftd.0b013e31822fbf7c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The efficacy of drugs for the treatment of substance-related disorders is moderate at best. Therapeutic drug monitoring (TDM) could be an instrument to improve outcomes. Because TDM for most of those drugs is not established, the authors reviewed the literature and built a rating scale to detect the potential added value of TDM for these pharmacologic agents. METHODS A literature search was performed for acamprosate, bupropion, buprenorphine, clomethiazole, disulfiram, methadone, naltrexone, and varenicline. The rating scale included 22 items and was divided in five categories: efficacy, toxicity, pharmacokinetics, patient characteristics, and cost-effectiveness. Three reference substances with established TDM were similarly assessed for comparison: clozapine, lithium, and nortriptyline. The three reference substances achieved scores of 15, 12, and 14 points, respectively. RESULTS Drugs for treatment of substance-related disorders achieved 3 to 17 points, 17 for methadone, 11 for buprenorphine, 10 for disulfiram, also 10 for naltrexone for the indication opioid-dependence and 9 for the indication alcohol dependence as well as bupropion, 7 points for acamprosate, 6 points for clomethiazole, and 3 for varenicline. CONCLUSIONS It is concluded that systematic evaluation of drug- and patient-related variables with the new rating scale can estimate the appropriateness of TDM. Because their rating revealed similar scores as the three reference drugs, it is proposed that TDM should be established for bupropion, buprenorphine, disulfiram or a metabolite, methadone, and naltrexone. An objective rating of drug- and patient-related characteristics could help laboratories focus their method development on the most likely drugs to require TDM along with a thorough drug use evaluation.
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Landmark CJ, Johannessen SI. Safety aspects of antiepileptic drugs-focus on pharmacovigilance. Pharmacoepidemiol Drug Saf 2011; 21:11-20. [DOI: 10.1002/pds.2269] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 08/22/2011] [Accepted: 09/19/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Cecilie Johannessen Landmark
- Institute of Pharmacy and Biomedical Sciences; Faculty of Health Sciences; Oslo Norway
- Akershus University; College of Applied Sciences; Oslo Norway
| | - Svein I. Johannessen
- The National Center for Epilepsy; Sandvika Norway
- Department of Pharmacology; Oslo University Hospital; Oslo Norway
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Johannessen SI, Landmark CJ. Antiepileptic drug interactions - principles and clinical implications. Curr Neuropharmacol 2011; 8:254-67. [PMID: 21358975 PMCID: PMC3001218 DOI: 10.2174/157015910792246254] [Citation(s) in RCA: 220] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2009] [Revised: 05/10/2010] [Accepted: 05/26/2010] [Indexed: 02/06/2023] Open
Abstract
Antiepileptic drugs (AEDs) are widely used as long-term adjunctive therapy or as monotherapy in epilepsy and other indications and consist of a group of drugs that are highly susceptible to drug interactions. The purpose of the present review is to focus upon clinically relevant interactions where AEDs are involved and especially on pharmacokinetic interactions. The older AEDs are susceptible to cause induction (carbamazepine, phenobarbital, phenytoin, primidone) or inhibition (valproic acid), resulting in a decrease or increase, respectively, in the serum concentration of other AEDs, as well as other drug classes (anticoagulants, oral contraceptives, antidepressants, antipsychotics, antimicrobal drugs, antineoplastic drugs, and immunosupressants). Conversely, the serum concentrations of AEDs may be increased by enzyme inhibitors among antidepressants and antipsychotics, antimicrobal drugs (as macrolides or isoniazid) and decreased by other mechanisms as induction, reduced absorption or excretion (as oral contraceptives, cimetidine, probenicid and antacides). Pharmacokinetic interactions involving newer AEDs include the enzyme inhibitors felbamate, rufinamide, and stiripentol and the inducers oxcarbazepine and topiramate. Lamotrigine is affected by these drugs, older AEDs and other drug classes as oral contraceptives. Individual AED interactions may be divided into three levels depending on the clinical consequences of alterations in serum concentrations. This approach may point to interactions of specific importance, although it should be implemented with caution, as it is not meant to oversimplify fact matters. Level 1 involves serious clinical consequences, and the combination should be avoided. Level 2 usually implies cautiousness and possible dosage adjustments, as the combination may not be possible to avoid. Level 3 refers to interactions where dosage adjustments are usually not necessary. Updated knowledge regarding drug interactions is important to predict the potential for harmful or lacking effects involving AEDs.
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Affiliation(s)
- Svein I Johannessen
- The National Center for Epilepsy, Sandvika, and Department of Pharmacology, Oslo University Hospital, Oslo, Norway
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Relationship between drug-induced interstitial lung diseases and cytochrome P450 polymorphisms. Curr Opin Pulm Med 2010; 16:496-502. [PMID: 20592596 DOI: 10.1097/mcp.0b013e32833c06f1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Interstitial lung disease and especially drug-induced interstitial lung disease can occur as a cause of drug(s) or drug-drug interactions. In this review we summarize the possible role of cytochrome P450 (CYP) enzymes in drug-induced interstitial lung disease. RECENT FINDINGS The CYP enzyme family plays an important role in the metabolism of all sorts of ingested, injected or inhaled xenobiotic substances. Although the liver is considered to be the major metabolism site of CYP enzymes, in recent years more CYP isoforms have been detected in lung tissue. Polymorphisms in these CYP genes can influence the metabolic activity of the subsequent enzymes, which in turn may lead to localized (toxic) reactions and tissue damage. SUMMARY Drug toxicity can be the consequence of no or very poor enzyme activity, especially if no other metabolic route is available. In the case of reduced enzyme activity, dose reduction or prescribing an alternative drug metabolized by a different, unaffected CYP enzyme is recommended to prevent toxic side effects. Therefore, knowing a patient's CYP profile before drug prescription could be a way to prevent drug-induced interstitial lung disease. Moreover, it might be helpful in explaining serious adverse effects from inhaled, injected or ingested xenobiotic substances.
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Gervasini G, Benítez J, Carrillo JA. Pharmacogenetic testing and therapeutic drug monitoring are complementary tools for optimal individualization of drug therapy. Eur J Clin Pharmacol 2010; 66:755-74. [PMID: 20582584 DOI: 10.1007/s00228-010-0857-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 06/02/2010] [Indexed: 01/08/2023]
Abstract
Genetic factors contribute to the phenotype of drug response, but the translation of pharmacogenetic outcomes into drug discovery, drug development or clinical practice has proved to be surprisingly disappointing. Despite significant progress in pharmacogenetic research, only a few drugs, such as cetuximab, dasatinib, maraviroc and trastuzumab, require a pharmacogenetic test before being prescribed. There are several gaps that limit the application of pharmacogenetics based upon the complex nature of the drug response itself. First, pharmacogenetic tests could be more clinically applicable if they included a comprehensive survey of variation in the human genome and took into account the multigenic nature of many phenotypes of drug disposition and response. Unfortunately, much of the existing research in this area has been hampered by limitations in study designs and the nonoptimal selection of gene variants. Secondly, although responses to drugs can be influenced by the environment, only fragmentary information is currently available on how the interplay between genetics and environment affects drug response. Third, the use of a pharmacogenetic test as a standard of care for drug therapy has to overcome significant scientific, economic, commercial, political and educational barriers, among others, in order for clinically useful information to be effectively communicated to practitioners and patients. Meanwhile, the lack of efficacy is in this process is quite as costly as drug toxicity, especially for very expensive drugs, and there is a widespread need for clinically and commercially robust pharmacogenetic testing to be applied. In this complex scenario, therapeutic drug monitoring of parent drugs and/or metabolites, alone or combined with available pharmacogenetic tests, may be an alternative or complementary approach when attempts are made to individualize dosing regimen, maximize drug efficacy and enhance drug safety with certain drugs and populations (e.g. antidepressants in older people).
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Affiliation(s)
- Guillermo Gervasini
- Department of Medical and Surgical Therapeutics, Division of Clinical Pharmacology, Medical School, University of Extremadura, 06071 Badajoz, Spain
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Feidt DM, Klein K, Hofmann U, Riedmaier S, Knobeloch D, Thasler WE, Weiss TS, Schwab M, Zanger UM. Profiling Induction of Cytochrome P450 Enzyme Activity by Statins Using a New Liquid Chromatography-Tandem Mass Spectrometry Cocktail Assay in Human Hepatocytes. Drug Metab Dispos 2010; 38:1589-97. [DOI: 10.1124/dmd.110.033886] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Wijnen PAHM, Limantoro I, Drent M, Bekers O, Kuijpers PMJC, Koek GH. Depressive effect of an antidepressant: therapeutic failure of venlafaxine in a case lacking CYP2D6 activity. Ann Clin Biochem 2009; 46:527-30. [PMID: 19822698 DOI: 10.1258/acb.2009.009003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Understanding the mechanisms of drug metabolism and interactions can help to prevent side-effects. Not only drug interactions, environmental factors, disease processes and ageing are factors in the inter-individual metabolic capacity variance but also genetic factors probably play an important role, as is illustrated in the case presented. Besides therapeutic drug monitoring, genotyping some important cytochrome P450 (CYP450) enzymes was of additional value in explaining why the patient developed severe adverse effects and, moreover, did not experience any therapeutical effect of venlafaxine. Results indicated that the patient was a poor metabolizer for CYP2D6, the most important phase I enzyme to metabolize venlafaxine. This corroborates that polymorphisms in the CYP450 gene influence the metabolic activity of the corresponding enzymes, thus affecting the subsequent serum drug levels and their metabolites. This case highlights the potential benefit of both clinical and genetic risk stratification (pharmacogenetics) prior to treatment, either for setting the individual dose or for making a decision about using a particular drug.
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Affiliation(s)
- P A H M Wijnen
- Department of Clinical Chemistry, ILD Care Center, Maastricht, The Netherlands
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Wijnen PAHM, Drent M, van Dieijen-Visser MP, Bekers O. Pharmacogenetic testing after a simple DNA isolation method on buccal swab samples. Pharmacogenomics 2009; 10:983-7. [PMID: 19530965 DOI: 10.2217/pgs.09.4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM To evaluate whether the quality and quantity of DNA isolated from noninvasively obtained buccal swab (BS) samples, using the previously described isolation method for dried blood spot (DBS) samples was satisfactory. MATERIALS & METHODS From 25 healthy volunteers, DBS samples were obtained by the capillary finger prick method and BS samples were obtained by rubbing a sterile, dry cotton swab against the inside of their cheek. Thereafter, DNA was isolated. In addition, the quantity of the obtained DNA was measured and melting curve analyses for both sampling methods were performed to establish the quality of the obtained DNA from both the DBS and BS samples. RESULTS The derivative melting curves of the DNA samples obtained from the capillary blood and BS were comparable and highly reproducible. The mean DNA concentrations measured were 16.0 ng/microl (12.6-19.4 ng/microl) and 70.2 ng/microl (57.3-83.1 ng/microl), respectively, for the DBS and BS samples (p < 0.001). CONCLUSION The DBS DNA isolation method appeared to be extremely useful to discriminate between genotypes. This expands the possibilities of this quick and easy DNA isolation procedure. In particular, the noninvasive BS sampling method appeared to be a good alternative to invasive sampling methods.
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Affiliation(s)
- Petal A H M Wijnen
- Maastricht University Medical Centre, PO Box 5800, 6202 AZ, Maastricht, The Netherlands
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Abstract
To examine the genetic factors influencing clozapine kinetics in vivo, 75 patients treated with clozapine were genotyped for CYPs and ABCB1 polymorphisms and phenotyped for CYP1A2 and CYP3A activity. CYP1A2 activity and dose-corrected trough steady-state plasma concentrations of clozapine correlated significantly (r = -0.61; P = 1 x 10), with no influence of the CYP1A2*1F genotype (P = 0.38). CYP2C19 poor metabolizers (*2/*2 genotype) had 2.3-fold higher (P = 0.036) clozapine concentrations than the extensive metabolizers (non-*2/*2). In patients comedicated with fluvoxamine, a strong CYP1A2 inhibitor, clozapine and norclozapine concentrations correlate with CYP3A activity (r = 0.44, P = 0.075; r = 0.63, P = 0.007, respectively). Carriers of the ABCB1 3435TT genotype had a 1.6-fold higher clozapine plasma concentrations than noncarriers (P = 0.046). In conclusion, this study has shown for the first time a significant in vivo role of CYP2C19 and the P-gp transporter in the pharmacokinetics of clozapine. CYP1A2 is the main CYP isoform involved in clozapine metabolism, with CYP2C19 contributing moderately, and CYP3A4 contributing only in patients with reduced CYP1A2 activity. In addition, ABCB1, but not CYP2B6, CYP2C9, CYP2D6, CYP3A5, nor CYP3A7 polymorphisms, influence clozapine pharmacokinetics.
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Naritoku DK, Faingold CL. Development of a therapeutics curriculum to enhance knowledge of fourth-year medical students about clinical uses and adverse effects of drugs. TEACHING AND LEARNING IN MEDICINE 2009; 21:148-152. [PMID: 19330694 DOI: 10.1080/10401330902791313] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND Enhanced clinical pharmacology and therapeutics education of medical students is important for improving effective and safe drug therapy. Increased education about pharmacovigilance is needed because serious drug-induced adverse effects are increasing. Fostering the needed scientific approach to prescribing requires knowledge of evidence-based drug therapy, based on understanding clinical trials. Therapeutic agents with novel mechanisms of action are increasingly available, and an unbiased understanding of the risks and benefits of novel agents is also important. These issues can be addressed in clinical pharmacology courses. However, many medical schools lack sufficient clinical pharmacologists to teach such courses. The Southern Illinois University Medical School faculty implemented an Advanced Therapeutics course to address these issues. DESCRIPTION Development of this course involved defining appropriate content and organizing preclinical pharmacology and clinical faculty into teaching teams. The course was offered to 4th-year medical students and covered clinical trial information, and cutting-edge therapeutic developments. The "ABCs of Pharmacology" is a mental algorithm that was presented in the sophomore year and reintroduced in this course. This algorithm emphasizes pharmacovigilance, which stresses the balance between positive and negative effects of pharmacological agents. General principles of clinical pharmacology and therapeutics were covered by a clinical pharmacologist. Most sessions on specific disease treatment involved an integrated presentation by a preclinical pharmacologist and a clinician with expertise in that topic, often in the context of clinical cases. Other important topics were emphasized, which reinforce individualization of therapy, including pharmacogenomics that may determine idiosyncratic responses. Feedback during and following the course was obtained via questionnaires. EVALUATION This approach was well received by participating students and graduates. Most students rated this course as a valuable experience. CONCLUSION This approach appears useful for educating medical students about therapeutics at medical schools that lack sufficient clinical pharmacology faculty to mount such a course.
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Affiliation(s)
- Dean K Naritoku
- Department of Neurology, Southern Illinois University School of Medicine, Springfield, IL 62794-9629, USA
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Wijnen PAHM, Drent M, Nelemans PJ, Kuijpers PMJC, Koek GH, Neef C, Haenen GRMM, Bekers O. Role of cytochrome P450 polymorphisms in the development of pulmonary drug toxicity: a case-control study in the Netherlands. Drug Saf 2009; 31:1125-34. [PMID: 19026029 DOI: 10.2165/0002018-200831120-00008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Drug-induced pulmonary toxicity is a serious and expanding problem with often unknown aetiology. Many drugs are metabolized by cytochrome P450 (CYP) enzymes. OBJECTIVE To establish whether allelic variation in CYP polymorphic genes contributes to variability in drug response and unexpected toxicity. METHODS A case-control study was conducted. The cases consisted of patients with drug-induced interstitial lung disease (DI-ILD; n = 59). Two control groups were used: one group of healthy volunteers (n = 173) and one group of patients with idiopathic pulmonary fibrosis (IPF; n = 110). RESULTS Of the patients with DI-ILD 91.5% (54/59) had at least one of the studied variant genes compared with 70.5% (122/173, p < 0.001) of the healthy volunteers and 69.1% (76/110, p < 0.001) of the IPF patients. The percentage of individuals with one or more variant CYP genes was higher in the DI-ILD group. Odds ratios were significantly increased and ranged from 3.25 to 40.8, indicating a significant association between the development of DI-ILD and the presence of one or more variant CYP genes. CONCLUSION DI-ILD appeared to be associated with the presence of at least one variant CYP allele. This study supports the potential usefulness of personalized medicine by genotyping aiming to improve efficacy, tolerability and drug safety.
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Affiliation(s)
- Petal A H M Wijnen
- Department of Clinical Chemistry, Maastricht University Medical Centre, Maastricht, The Netherlands
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van Puijenbroek E, Conemans J, van Grootheest K. Spontaneous ADR Reports as a Trigger for Pharmacogenetic Research. Drug Saf 2009; 32:255-64. [DOI: 10.2165/00002018-200932030-00008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Sirot EJ, Baumann P. Therapeutic Drug Monitoring and Pharmacogenetic Tests in Pharmacovigilance - When and What? Eur Psychiatry 2009. [DOI: 10.1016/s0924-9338(09)70340-2] [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: 10/21/2022] Open
Abstract
More than 80% of all adverse drug reactions are Type A reactions and dependent on drug concentrations. Therapeutic Drug Monitoring (TDM), Drug Interaction checking programs and pharmacogenetic tests are valuable instruments in elucidating or preventing Type A reactions. It stands for Quality Assurance in clinical practice. The TDMplus algorithm (Jaquenoud Sirot E et al 2006) is helpful in clinical practice and prevents unnecessary testing. This decision tree leads in several “stop/go” steps from the clinical situation of inefficacy or adverse reaction to measuring and interpreting plasma levels, checking for pharmacokinetic interactions and finally, if indicated, to pharmacogenetic tests with gentoyping and/or phenotyping. Genetic results are noted on a personal “pharmacogenetic card” for the patient's future treatments.The interplay of genetics, drug interactions, life style and other personal vulnerabilities like comorbidity make prediction of drug response very complex. The use of TDMplus has proven useful guiding the clinicians in difficult clinical situations and helping elucidating the causality of adverse drug reactions. Its practical benefit has been shown with pharmacovigilance cases from the AMSP program (Arzneimittelsicherheit in der Psychiatrie = Drug Safety in Psychiatry).
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Hiemke C. Therapeutic drug monitoring in neuropsychopharmacology: does it hold its promises? Eur Arch Psychiatry Clin Neurosci 2008; 258 Suppl 1:21-7. [PMID: 18344046 DOI: 10.1007/s00406-007-1005-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To produce its characteristic effects, a drug must be present in appropriate concentrations at its sites of action. The latter is not only a function of the dose administered, but also of the extent and rate of drug absorption, distribution, tissue binding, biotransformation, and excretion, which can vary markedly between individual patients due to differences in gender, age, morbidity, smoking or eating habits, differential expression of drug metabolising enzymes or drug transporters or other factors. Therefore drug concentrations in blood resulting after a given dose differ by tenfold or more between individual patients. For psychoactive drugs, animal studies have shown that plasma concentrations of psychotropic drugs correlate well with concentrations in the target organ, the brain. In the brain of patients treated with antipsychotic or antidepressant drugs clear-cut relationships were found between plasma concentrations of the drug and occupancy of dopamine receptors or serotonin uptake sites by positron emission tomography (PET). Monitoring concentrations of psychoactive drugs in plasma of patients, so called therapeutic drug monitoring (TDM), is therefore useful to adjust dosages for optimal "receptor" blockade. TDM is well established for mood stabilizers and anticonvulsant drugs. For other neuropsychiatric drugs, however, "routine" TDM is rare. Optimal target concentrations are unclear for many drugs, and the number of laboratories that use reliable methods to measure the low concentrations of the drugs within a single day is quite limited. Moreover, the use of TDM in practice is far from optimal. The TDM group of the Arbeitsgemeinschaft für Neuropsychopharmakologie und Pharmakopsychiatrie (AGNP see http://www.agnp.de/) has published literature-based guidelines for optimal use of TDM in psychiatry. TDM can be most informative to solve problems underlying the treatment of an individual patient. It can be clarified if suggested non-compliance or insufficient response in spite of recommended doses is due to rapid metabolism of the drug. Moreover, many drug interactions have been detected by using TDM. In conclusion, TDM is a reliable tool to optimise psychopharmacotherapy. When used adequately it is helpful for many psychiatric patients and in many situations.
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Affiliation(s)
- Christoph Hiemke
- Department of Psychiatry, University of Mainz, Untere Zahlbacher Str 8, Mainz, Germany.
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Baumann P. Pharmacovigilance in psychiatry: pharmacogenetic tests and therapeutic drug monitoring are promising tools. Expert Rev Clin Pharmacol 2008; 1:183-5. [PMID: 24422642 DOI: 10.1586/17512433.1.2.183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Pierre Baumann
- Département de Psychiatrie (DP-CHUV), DP-CHUV, Site de Cery, CH-1008 Prilly-Lausanne, Switzerland.
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Swen JJ, Wilting I, Goede ALD, Grandia L, Mulder H, Touw DJ, Boer AD, Conemans JMH, Egberts TCG, Klungel OH, Koopmans R, Weide JVD, Wilffert B, Guchelaar HJ, Deneer VHM. Pharmacogenetics: From Bench to Byte. Clin Pharmacol Ther 2008; 83:781-7. [DOI: 10.1038/sj.clpt.6100507] [Citation(s) in RCA: 173] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Hiemke C. Clinical utility of drug measurement and pharmacokinetics – therapeutic drug monitoring in psychiatry. Eur J Clin Pharmacol 2008; 64:159-66. [DOI: 10.1007/s00228-007-0430-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Accepted: 11/22/2007] [Indexed: 12/31/2022]
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Ormerod S, McDowell SE, Coleman JJ, Ferner RE. Ethnic Differences in the Risks of Adverse Reactions to Drugs Used in the Treatment of Psychoses and Depression. Drug Saf 2008; 31:597-607. [DOI: 10.2165/00002018-200831070-00005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Drug Plasma Levels and ADRs: Usefulness of the TDM Plus Algorithm. Drug Saf 2008. [DOI: 10.2165/00002018-200831100-00028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Brandt C, Baumann P, Eckermann G, Hiemke C, May TW, Rambeck B, Pohlmann-Eden B. „Therapeutic drug monitoring“ in Epileptologie und Psychiatrie. DER NERVENARZT 2007; 79:167-74. [PMID: 17701390 DOI: 10.1007/s00115-007-2325-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Experts from epileptology and psychiatry reviewed the current significance of therapeutic drug monitoring (TDM) of antiepileptic drugs and psychiatric drugs in a workshop at Bethel Epilepsy Centre in December 2005. TDM has been essential in epileptology for about 30 years, and it is also increasingly important in psychiatry, in which consensus recommendations were published recently. With regard to cost-cutting in the health system, there are discussions about the financial effect of TDM and outsourcing it to bigger laboratories. In psychiatry it has however been shown that sensibly used TDM may lead to reduced costs. Many issues in TDM require the knowledge and experience of specialised laboratories. The use of TDM data for scientific purposes was discussed at the workshop as well.
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Affiliation(s)
- C Brandt
- Evangelisches Krankenhaus, Epilepsiezentrum Bethel (Kliniken), Maraweg 21, Bielefeld, Germany.
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Chowdhury J, Kaigala GV, Pushpakom S, Lauzon J, Makin A, Atrazhev A, Stickel A, Newman WG, Backhouse CJ, Pilarski LM. Microfluidic platform for single nucleotide polymorphism genotyping of the thiopurine S-methyltransferase gene to evaluate risk for adverse drug events. J Mol Diagn 2007; 9:521-9. [PMID: 17690215 PMCID: PMC1975104 DOI: 10.2353/jmoldx.2007.070014] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Prospective clinical pharmacogenetic testing of the thiopurine S-methyltransferase gene remains to be realized despite the large body of evidence demonstrating clinical benefit for the patient and cost effectiveness for health care systems. We describe an entirely microchip-based method to genotype for common single nucleotide polymorphisms in the thiopurine S-methyltransferase gene that lead to serious adverse drug reactions for patients undergoing thiopurine therapy. Restriction fragment length polymorphism and allele-specific polymerase chain reaction have been adapted to a microfluidic chip-based polymerase chain reaction and capillary electrophoresis platform to genotype the common *2, *3A, and *3C functional alleles. In total, 80 patients being treated with thiopurines were genotyped, with 100% concordance between microchip and conventional methods. This is the first report of single nucleotide polymorphism detection using portable instrumentation and represents a significant step toward miniaturized for personalized treatment and automated point-of-care testing.
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Affiliation(s)
- Jeeshan Chowdhury
- Cross Cancer Institute, 11560 University Ave., Edmonton AB T6G1Z2, Canada
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