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Kassogue Y, Fricke-Galindo I. Editorial: The impact of the human genome on interindividual variability in drug response. Front Genet 2024; 15:1401604. [PMID: 38711917 PMCID: PMC11070934 DOI: 10.3389/fgene.2024.1401604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 03/20/2024] [Indexed: 05/08/2024] Open
Affiliation(s)
- Yaya Kassogue
- Centre de Recherche et de Formation sur les Pathologies Moléculaires, Faculté de Médecine et d’Odonto-Stomatologie, Université des Sciences, des Techniques et des Technologies de Bamako, Mali, West Africa
| | - Ingrid Fricke-Galindo
- HLA Laboratory, Instituto Nacional de Enfermedades Respiratorias Ismael Cosio Villegas, Mexico City, Mexico
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Stingl J, Aklillu E, Masimirembwa C, Kek TL. "Always look at the outliers": in memoriam Leif Bertilsson. Eur J Clin Pharmacol 2024:10.1007/s00228-024-03667-9. [PMID: 38565697 DOI: 10.1007/s00228-024-03667-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 03/05/2024] [Indexed: 04/04/2024]
Affiliation(s)
- Julia Stingl
- Institute of Clinical Pharmacology, University Hospital RWTH Aachen, Wendlingweg 2, 52074, Aachen, Germany.
| | - Eleni Aklillu
- Global Health Pharmacology and Therapeutics, Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Collen Masimirembwa
- African Institute of Biomedical Science and Technology, Wilkins Hospital Harare, Harare, Zimbabwe
| | - Teh Lay Kek
- Faculty of Pharmacy, UiTM Puncak Alam Campus, Bandar Puncak Alam, Selangor, Malaysia
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Shilbayeh SAR, Adeen IS, Alhazmi AS, Ibrahim SF, Al Enazi FAR, Ghanem EH, Binduraihem AM. The Frequency of CYP2D6 and CYP3A4/5 Genotypes and The Impact of Their Allele Translation and Phenoconversion-Predicted Enzyme Activity on Risperidone Pharmacokinetics in Saudi Children with Autism. Biochem Genet 2023:10.1007/s10528-023-10580-w. [PMID: 38041757 DOI: 10.1007/s10528-023-10580-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 10/28/2023] [Indexed: 12/03/2023]
Abstract
Data on the role of CYP2D6 and CYP3A4/5 polymorphisms in relation to risperidone (RIS) pharmacokinetics (PK) in children are relatively limited and inconsistent. This is partially attributable to the limited coverage of CYP2D6 and CYP3A4/5 metabolizer phenotypes, particularly those of poor and ultrarapid metabolizers (PMs and UMs), which has led to calls for studies of populations with a non-European background that may carry variants that are less frequent in Europeans. Children ≤ 18 years old with at least 8 weeks of a RIS-based regimen were recruited from three autism centers in Riyadh, Saudi Arabia. The primary outcomes measured were plasma concentrations of RIS and 9-hydroxyrisperidone (9-OH-RIS) and their dose-adjusted (C/D) ratios as a function of phenotypes and activity score (AS). For accurate DNA genotyping, targeted pharmacogenomic testing with the Axiom PharmacoFocus Array was performed via examination of a broad collection of probesets targeting CYP2D6 and CYP3A4/5 variants. The frequency of genotypes/phenotypes and the impact of their allele translation and phenoconversion-predicted enzyme activity were examined. The final cohort included 83 individuals. The most common CYP2D6 phenotype in our population was normal metabolizers (NMs, 66.3%). Inconsistent with some previous studies, the three phenotypes of intermediate metabolizers (IMs), NMs, and UMs were significantly different in terms of RIS concentration, the RIS/9-OH-RIS ratio, the RIS C/D ratio and the 9-OH-RIS C/D ratio. According to AS analyses, there were statistically significant differences in the RIS concentration (P = 0.013), RIS/9-OH-RIS ratio (P < 0.001) and RIS C/D ratio (P = 0.030) when patients were categorized into AS ≤ 1 vs. AS > 1. None of the CYP3A4/5 star allele translated phenotypes revealed a significant influence on any of the RIS PK parameters. Notably, neither CYP2D6 nor CYP3A4/5 phenotyping demonstrated a significant impact on the total active moiety, suggesting that other gene variants could modulate RIS PK. The study confirmed the previously reported partial impact of the CYP2D6 gene on RIS PK. However, future studies using contemporary genotyping techniques targeting a wide range of variants in other candidate genes must be conducted to further examine their interactive effects on RIS PK and the clinical response.
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Affiliation(s)
- Sireen Abdul Rahim Shilbayeh
- Department of Pharmacy Practice, College of Pharmacy, Princess Nourah bint Abdulrahman University (PNU), P.O. Box 84428, 11671, Riyadh, Saudi Arabia.
| | - Iman Sharaf Adeen
- Department of Pediatric Behavior and Development and Adolescent Medicine, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Ayman Shawqi Alhazmi
- Department of Pediatric Behavior and Development and Adolescent Medicine, King Saud Medical City, Riyadh, Saudi Arabia
| | - Samah Fathy Ibrahim
- College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Fawwaz Abdul Razaq Al Enazi
- Department of Pediatric Behavior and Development and Adolescent Medicine, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Ezzeldeen Hasan Ghanem
- Pharmaceutical Analysis Section, King Abdullah International Medical Research Center (KAIMRC), King Abdulaziz Medical City, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia
| | - Adel Mohammed Binduraihem
- Health Sciences Research Center, King Abdullah Bin Abdulaziz University Hospital, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
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Murray M. Mechanisms and Clinical Significance of Pharmacokinetic Drug Interactions Mediated by FDA and EMA-approved Hepatitis C Direct-Acting Antiviral Agents. Clin Pharmacokinet 2023; 62:1365-1392. [PMID: 37731164 DOI: 10.1007/s40262-023-01302-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] [Accepted: 08/28/2023] [Indexed: 09/22/2023]
Abstract
The treatment of patients infected with the hepatitis C virus (HCV) has been revolutionised by the development of direct-acting antiviral agents (DAAs) that target specific HCV proteins involved in viral replication. The first DAAs were associated with clinical problems such as adverse drug reactions and pharmacokinetic drug-drug interactions (DDIs). Current FDA/EMA-approved treatments are combinations of DAAs that simultaneously target the HCV N5A-protein, the HCV N5B-polymerase and the HCV NS3/4A-protease. Adverse events and DDIs are less likely with these DAA combinations but several DDIs of potential clinical significance remain. Much of the available information on the interaction of DAAs with CYP drug-metabolising enzymes and influx and efflux transporters is contained in regulatory summaries and is focused on DDIs of likely clinical importance. Important DDIs perpetrated by current DAAs include increases in the pharmacokinetic exposure to statins and dabigatran. Some mechanistic information can be deduced. Although the free concentrations of DAAs in serum are very low, a number of these DDIs are likely mediated by the inhibition of systemic influx transporters, especially OATP1B1/1B3. Other DDIs may arise by DAA-mediated inhibition of intestinal efflux transporters, which increases the systemic concentrations of some coadministered drugs. Conversely, DAAs are victims of DDIs mediated by cyclosporin, ketoconazole, omeprazole and HIV antiretroviral drug combinations, especially when boosted by ritonavir and, to a lesser extent, cobicistat. In addition, concurrent administration of inducers, such as rifampicin, carbamazepine and efavirenz, decreases exposure to some DAAs. Drug-drug interactions that increase the accumulation of HCV N3/4A-protease inhibitors like grazoprevir may exacerbate hepatic injury in HCV patients.
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Affiliation(s)
- Michael Murray
- School of Pharmacy, Faculty of Medicine and Health, University of Sydney, New South Wales, 2006, Australia.
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Liu F, Xu Y, Wang L, Ma X, Zhang Z, Zhuang X. Combined contributions of cytochrome P450s (CYPs) and non-enzymatic metabolism in the in vitro biotransformation of anaprazole, a novel proton pump inhibitor. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:1759-1771. [PMID: 36847804 DOI: 10.1007/s00210-023-02415-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 01/31/2023] [Indexed: 03/01/2023]
Abstract
Anaprazole, a new proton pump inhibitor (PPI), is designed for the treatment of acid-related diseases, such as gastric ulcers and gastroesophageal reflux. This study explored the in vitro metabolic transformation of anaprazole. The metabolic stabilities of anaprazole in human plasma and human liver microsomes (HLM) were analyzed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Then, the contribution (%) of non-enzymatic and cytochrome P450s (CYPs) enzyme-mediated anaprazole metabolism was assessed. To obtain the metabolic pathways of anaprazole, the metabolites generated in HLM, thermal deactivated HLM, and cDNA-expressed recombinant CYPs incubation systems were identified by ultra-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry (UPLC/Q-TOF-MS). Results showed that anaprazole was very stable in human plasma and unstable in HLM. The contribution (%) of non-enzymatic vs. CYPs enzyme-mediated metabolism was 49% vs. 51%. CYP3A4 was the major enzyme (48.3%), followed by CYP2C9 (17.7%) and CYP2C8 (12.3%), in responsible for the metabolism of anaprazole. Specific chemical inhibitors targeting CYP enzymes notably blocked the metabolic transformation of anaprazole. Six metabolites of anaprazole were identified in the non-enzymatic system, whereas 17 metabolites were generated in HLM. The biotransformation reactions mainly included sulfoxide reduction to thioether, sulfoxide oxidation to sulfone, deoxidation, dehydrogenation, O-dealkylation or O-demethylation of thioether, O-demethylation and dehydrogenation of thioether, O-dealkylation and dehydrogenation of thioether, thioether O-dealkylation and dehydrogenation of thioether, and O-dealkylation of sulfone. Both enzymatic and non-enzymatic metabolisms contribute to the clearance of anaprazole in human. Anaprazole is less likely to develop drug-drug interactions in clinical use compared to other PPIs.
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Affiliation(s)
- Fei Liu
- Xuanzhu Biopharmaceutical Co., Ltd, Shijiazhuang, 051430, China
| | - Yanjun Xu
- Xuanzhu Biopharmaceutical Co., Ltd, Shijiazhuang, 051430, China
| | - Li Wang
- Xuanzhu Biopharmaceutical Co., Ltd, Shijiazhuang, 051430, China
| | - Xifeng Ma
- Xuanzhu Biopharmaceutical Co., Ltd, Shijiazhuang, 051430, China
| | - Zhen Zhang
- Xuanzhu Biopharmaceutical Co., Ltd, Shijiazhuang, 051430, China
| | - Xiaomei Zhuang
- Beijing Institute of Pharmacology and Toxicology, No.27 Taiping Road, Haidian District, Beijing, 100850, China.
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Kataoka M, Ohshiro S, Minami K, Hasegawa T, Higashino H, Takagi T, Togashi K, Mutaguchi K, Yamashita S. Contribution analysis of metabolic tissues on systemic exposure of an active metabolite after oral administration of verapamil using a stable isotope-labeled compound. Drug Metab Pharmacokinet 2023; 51:100514. [PMID: 37364522 DOI: 10.1016/j.dmpk.2023.100514] [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: 02/03/2023] [Revised: 04/18/2023] [Accepted: 05/11/2023] [Indexed: 06/28/2023]
Abstract
The present study illustrates the advantage of an isotope-IV study for the contribution analysis of metabolic tissues on systemic exposure of metabolites. A model parent drug, verapamil (VER), and its metabolite, norverapamil (Nor-VER), were used. This isotope-IV study used rats with and without the pre-treatment of the CYP inhibitor 1-aminobenzotriazole (ABT), was performed by the oral administration of VER (1 mg/kg) combined with the intravenous administration of stable isotope-labeled VER (VER-d6, 0.005 mg/kg). Plasma concentration profiles of both compounds and respective metabolites (Nor-VER, Nor-VER-d6) were then evaluated by LC-MSMS. VER oral availability was increased, and the systemic clearance decreased, in addition, the relative systemic exposure of Nor-VER and Nor-VER-d6 was increased by ABT pre-treatment. PK analyses revealed that, in ABT untreated rats, most Nor-VER in systemic circulation originated from the intestinal absorption process. ABT pre-treatment increased the contribution ratio to the systemic exposure of Nor-VER from the hepatic metabolism of systemically circulated VER, and decreased the contribution ratio of intestinal metabolism. These findings indicated that the isotope-IV study may be useful for considering the PK profile of metabolites.
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Affiliation(s)
- Makoto Kataoka
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan.
| | - Shota Ohshiro
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan
| | - Keiko Minami
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan
| | - Tsubasa Hasegawa
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan
| | - Haruki Higashino
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan
| | - Toshihide Takagi
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan
| | - Kazutaka Togashi
- Pharmaceutical Business Division, Sumika Chemical Analysis Service, Ltd., Osaka, 554-0022, Japan
| | - Kuninori Mutaguchi
- Pharmaceutical Business Division, Sumika Chemical Analysis Service, Ltd., Osaka, 554-0022, Japan
| | - Shinji Yamashita
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-Cho, Hirakata, Osaka, 573-0101, Japan
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Wang X, Wang C, Zhang Y, An Z. Effect of pharmacogenomics testing guiding on clinical outcomes in major depressive disorder: a systematic review and meta-analysis of RCT. BMC Psychiatry 2023; 23:334. [PMID: 37173736 PMCID: PMC10176803 DOI: 10.1186/s12888-023-04756-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 04/06/2023] [Indexed: 05/15/2023] Open
Abstract
BACKGROUND Pharmacogenomic testing guided treatment have been developed to guide drug selection or conversion in major depressive disorder patients. Whether patients benefit from pharmacogenetic testing remains unclear. We aim to evaluates the effect of pharmacogenomic testing guiding on clinical outcomes of major depressive disorder. METHODS Pubmed, Embase, and Cochrane Library of Clinical Trials were searched from inception until August 2022. Key terms included pharmacogenomic and antidepressive. Odds ratios (RR) with 95% confidence intervals (95%CIs) were calculated using fixed-effects model for low or moderate heterogeneity or random-effects model for high heterogeneity. RESULTS Eleven studies (5347 patients) were included. Compared with usual group, pharmacogenomic testing guided group was associated with an increased response rate at week 8 (OR 1.32, 95%CI 1.15-1.53, 8 studies, 4328 participants) and week 12 (OR 1.36, 95%CI 1.15-1.62, 4 studies, 2814 participants). Similarly, guided group was associated with an increased rate of remission at week 8 (OR 1.58, 95%CI 1.31-1.92, 8 studies, 3971 participants) and week 12 (OR 2.23, 95%CI 1.23-4.04, 5 studies, 2664 participants). However, no significant differences were found between the two groups in response rate at week 4 (OR 1.12, 95%CI 0.89-1.41, 2 studies, 2261 participants) and week 24 (OR 1.16, 95%CI 0.96-1.41, 2 studies, 2252 participants), and remission rate at week 4 (OR 1.26, 95%CI 0.93-1.72, 2 studies, 2261 participants) and week 24 (OR 1.06, 95%CI 0.83-1.34, 2 studies, 2252 participants). Medication congruence in 30 days was significantly reduced in the pharmacogenomic guided group compared with the usual care group (OR 2.07, 95%CI 1.69-2.54, 3 studies, 2862 participants). We found significant differences between subgroups of target population in response and remission rate. CONCLUSION Patients with major depressive disorder may benefit from pharmacogenomic testing guided treatment by achieving target response and remission rates more quickly.
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Affiliation(s)
- Xinrui Wang
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Chenfei Wang
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China
| | - Yi Zhang
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China.
| | - Zhuoling An
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, China.
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Jia M, An B, Yan B, Ma Q, Wen B, Zhao S, Gao C, Ma X, Zhang L, Li B, Zhang P, Wang J, Yu H, Wang W. A comparison of clinical characteristics of psychiatric inpatients in three hospitals from Western China and America. BMC Psychiatry 2023; 23:6. [PMID: 36597094 PMCID: PMC9811694 DOI: 10.1186/s12888-022-04500-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 12/27/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Different countries have differences in social and cultural context and health system, which may affect the clinical characteristics of psychiatric inpatients. This study was the first to compare cross-cultural differences in the clinical characteristics of psychiatric inpatients in three hospitals from Western China and America. METHODS Overall, 905 and 1318 patients from three hospitals, one in America and two in Western China, respectively, were included. We used a standardised protocol and data collection procedure to record inpatients' sociodemographic and clinical characteristics. RESULTS Significant differences were found between hospitals from the two countries. Positive symptoms were the main reason for admission in the Chinese hospitals, while reported suicide and self-injury symptoms more frequently led to hospital admission in America. Moreover, there were more inpatients with combined substance abuse in the American hospital (97.6% vs. 1.9%, P < 0.001). The length of stay (LOS) in America was generally shorter than in China (10.5 ± 11.9 vs. 20.7 ± 13.4, P < 0.001). The dosage of antipsychotic drugs used in the American hospital was higher than in China (275.1 ± 306.9 mg vs. 238.3 ± 212.5 mg, P = 0.002). Regression analysis showed that male sex, older age, retirees, being admitted because of physical symptoms, and using higher doses of antipsychotic drugs were significantly associated with longer hospitalisation in the American hospital (P < 0.05). Comparatively, patients who were divorced, experiencing suicidal ideation, admitted involuntarily, admitted because of physical, depression, or anxiety symptoms, and using higher doses of antipsychotic drugs had longer hospitalisation in Chinese hospitals (P < 0.05). CONCLUSION Significant variations in clinical characteristics of inpatients were found between hospitals from Western China and America. The LOS in Chinese hospitals was significantly longer, but patients used higher doses of antipsychotic drugs in the American hospital. Admission due to physical symptoms and the use of higher dosage drugs were related to longer LOS in both countries.
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Affiliation(s)
- Min Jia
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Bang An
- grid.440299.2Department of Psychiatry, Xianyang Central Hospital, 78 Renmin East Road, Xianyang, 712099 China
| | - Bin Yan
- grid.452438.c0000 0004 1760 8119Clinical Research Center for Psychiatric Medicine of Shaanxi Province, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Qingyan Ma
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Binglong Wen
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Shanshan Zhao
- grid.440299.2Department of Psychiatry, Xianyang Central Hospital, 78 Renmin East Road, Xianyang, 712099 China
| | - Chengge Gao
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Xiancang Ma
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Lili Zhang
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Bin Li
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Ping Zhang
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Jian Wang
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Hong Yu
- University at Buffalo-Psychiatry, Erie County Medical Center, 462 Grider Street, Buffalo, New York, USA.
| | - Wei Wang
- Department of Psychiatry, The First Affiliated Hospital of Xi'an Jiaotong University, 277 Yanta West Road, Xi'an, 710061, China.
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Djordjevic N. Genotyping genetic variants of CYP2C19 for precision antiplatelet dosing: state of the art and future perspectives. Expert Opin Drug Metab Toxicol 2022; 18:817-830. [PMID: 36606363 DOI: 10.1080/17425255.2022.2166486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Clopidogrel is the only antiplatelet agent whose activity is significantly affected by CYP2C19 polymorphism. AREAS COVERED This review has summarized the available evidence on the clinically significant association between CYP2C19 polymorphism and clopidogrel-based therapy; reviewed the current recommendations for clinical use of CYP2C19 genotype test results in patients on clopidogrel treatment; and discussed possible pitfalls of routine application, and future perspectives of antiplatelets pharmacogenetics. EXPERT OPINION The available body of evidence, reflected in several meta-analyses and high-quality clinical practice guidelines, shows that the presence of CYP2C19 LOF alleles, especially CYP2C19*2, correlates with impaired activation of clopidogrel and variable platelet inhibition, followed by minimal or no antiplatelet effect, and higher risk of treatment failure. In combination with other known risk factors, CYP2C19 genetic testing could be very valuable in predicting low clopidogrel efficacy. At the same time, it could be very successful in selecting patients who will most probably benefit from the clopidogrel-based therapy, thus decreasing the pool of those who might need more expensive and otherwise riskier antiplatelet alternatives.
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Affiliation(s)
- Natasa Djordjevic
- Faculty of Medical Sciences, Department of Pharmacology and Toxicology, University of Kragujevac, Svetozara Markovica 69, 34 000 Kragujevac, Serbia
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Martinho ACC, Resende DDM, Landin ES, Dit Lapierre TJWJ, Bernardes TCD, Martins LC, Ferreira RS, Murta SMF, de Oliveira Rezende Júnior C. Synthesis, Design, and Structure-Activity Relationship of a Benzenesulfonylpiperazine Series Against Trypanosoma Cruzi. ChemMedChem 2022; 17:e202200211. [PMID: 35993440 DOI: 10.1002/cmdc.202200211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 08/19/2022] [Indexed: 11/09/2022]
Abstract
Chagas disease is a neglected tropical disease, endemic in Latin America and caused by the protozoan parasite Trypanosoma cruzi . Available treatments show low cure efficacy during the chronic phase of the disease and cause a series of side effects, reinforcing the need to develop new drugs against Chagas disease. In this work, we describe the optimization of a trypanocidal hit compound recently reported in phenotypic HTS studies against Trypanosoma cruzi . A hit-to-lead process was initiated and a structure-activity relationship against Trypanosoma cruzi was obtained after the synthesis and biological evaluation of 22 new benzenesulfonylpiperazine derivatives. From this SAR study, we identified three compounds with a promising predicted ADMET profile and potency comparable to the reference drug benznidazole, which are candidates for further development towards therapies for Chagas disease.
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Affiliation(s)
| | - Daniela de Melo Resende
- Fundação Oswaldo Cruz Instituto René Rachou: Fundacao Oswaldo Cruz Instituto Rene Rachou, René Rachou Institute, BRAZIL
| | - Emanuelly Silva Landin
- Federal University of Uberlandia: Universidade Federal de Uberlandia, Chemistry Institute, BRAZIL
| | | | | | - Luan Carvalho Martins
- Federal University of Minas Gerais: Universidade Federal de Minas Gerais, Biochemistry and immunology, BRAZIL
| | - Rafaela Salgado Ferreira
- Federal University of Minas Gerais: Universidade Federal de Minas Gerais, Biochemistry and immunology, BRAZIL
| | - Silvane Maria Fonseca Murta
- Oswaldo Cruz Foundation Rene Rachou Institute: Fundacao Oswaldo Cruz Instituto Rene Rachou, René Rachou Institute, BRAZIL
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11
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Alvarado AT, Ybañez-Julca R, Muñoz AM, Tejada-Bechi C, Cerro R, Quiñones LA, Varela N, Alvarado CA, Alvarado E, Bendezú MR, García JA. Frequency of CYP2D6*3 and *4 and metabolizer phenotypes in three mestizo Peruvian populations. PHARMACIA 2021. [DOI: 10.3897/pharmacia.68.e75165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Wild type genotypes (CYP2D6) and their allelic variants have been described in a sample of a Peruvian mestizo population. The global allele frequency was 0.015 for CYP2D6*3 and 0.051 for CYP2D6*4. The percentages of genotypes described were 97% CYP2D6*1/*1 and 3.0% CYP2D6*1/*3; 90.60% for CYP2D6*1/*1, 8.55% CYP2D6*1/*4 and 0.85% CYP2D6*4/*4. The allelic frequencies of CYP2D6*3 in the Lima subpopulations were 0.022 and 0.010 for Junin; CYP2D6*4 of 0.048, 0.060, and 0.050 for residents of Lima, Junín, and Tacna, respectively. The Hardy-Weinberg equilibrium test for the studied population showed that both frequencies are in equilibrium, p <.05. The metabolizer phenotype was inferred according to the genotypes: 11.54% were classified as intermediate metabolizers (*1/*3 or *1/*4) and 0.85% as poor metabolizers (*4/*4). It is concluded that the frequencies of the CYP2D6*3 and CYP2D6*4 alleles are low for the Peruvian mestizo population compared to the Latin American and tricontinental population, due to their natural population evolution, which is manifested by their decreased metabolic activity, the same that is relevant in clinical practice.
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12
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Lyngstad G, Skjelbred P, Swanson DM, Skoglund LA. Analgesic effect of oral ibuprofen 400, 600, and 800 mg; paracetamol 500 and 1000 mg; and paracetamol 1000 mg plus 60 mg codeine in acute postoperative pain: a single-dose, randomized, placebo-controlled, and double-blind study. Eur J Clin Pharmacol 2021; 77:1843-1852. [PMID: 34655316 PMCID: PMC8585829 DOI: 10.1007/s00228-021-03231-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 10/08/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE Effect size estimates of analgesic drugs can be misleading. Ibuprofen (400 mg, 600 mg, 800 mg), paracetamol (1000 mg, 500 mg), paracetamol 1000 mg/codeine 60 mg, and placebo were investigated to establish the multidimensional pharmacodynamic profiles of each drug on acute pain with calculated effect size estimates. METHODS A randomized, double-blind, single-dose, placebo-controlled, parallel-group, single-centre, outpatient, and single-dose study used 350 patients (mean age 25 year, range 18 to 30 years) of homogenous ethnicity after third molar surgery. Primary outcome was sum pain intensity over 6 h. Secondary outcomes were time to analgesic onset, duration of analgesia, time to rescue drug intake, number of patients taking rescue drug, sum pain intensity difference, maximum pain intensity difference, time to maximum pain intensity difference, number needed to treat values, adverse effects, overall drug assessment as patient-reported outcome measure (PROM), and the effect size estimates NNT and NNTp. RESULTS Ibuprofen doses above 400 mg do not significantly increase analgesic effect. Paracetamol has a very flat analgesic dose-response profile. Paracetamol 1000/codeine 60 mg gives similar analgesia as ibuprofen from 400 mg, but has a shorter time to analgesic onset. Active drugs show no significant difference in maximal analgesic effect. Other secondary outcomes support these findings. The frequencies of adverse effects were low, mild to moderate in all active groups. NNT and NTTp values did not coincide well with PROMs. CONCLUSION Ibuprofen doses above 400 mg for acute pain offer limited analgesic gain. Paracetamol 1000 mg/codeine 60 mg is comparable to ibuprofen doses from 400 mg. Calculated effect size estimates and PROM in our study seem not to relate well as clinical analgesic efficacy estimators. TRIAL REGISTRATION NCT00699114.
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Affiliation(s)
- Gaute Lyngstad
- Section of Dental Pharmacology and Pharmacotherapy, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, Blindern, P. O. Box 1119, N-0317 Nydalen Oslo, Norway
| | - Per Skjelbred
- Department of Maxillofacial Surgery, Oslo University Hospital, P. O. Box 4950, Nydalen N-0424 Oslo, Norway
| | - David M. Swanson
- Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Blindern, P.O. Box 1122, N-0317 Oslo, Norway
| | - Lasse A. Skoglund
- Section of Dental Pharmacology and Pharmacotherapy, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, Blindern, P. O. Box 1119, N-0317 Nydalen Oslo, Norway
- Department of Maxillofacial Surgery, Oslo University Hospital, P. O. Box 4950, Nydalen N-0424 Oslo, Norway
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13
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Gao S, Bell EC, Zhang Y, Liang D. Racial Disparity in Drug Disposition in the Digestive Tract. Int J Mol Sci 2021; 22:1038. [PMID: 33494365 PMCID: PMC7865938 DOI: 10.3390/ijms22031038] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/17/2021] [Accepted: 01/18/2021] [Indexed: 12/13/2022] Open
Abstract
The major determinants of drug or, al bioavailability are absorption and metabolism in the digestive tract. Genetic variations can cause significant differences in transporter and enzyme protein expression and function. The racial distribution of selected efflux transporter (i.e., Pgp, BCRP, MRP2) and metabolism enzyme (i.e., UGT1A1, UGT1A8) single nucleotide polymorphisms (SNPs) that are highly expressed in the digestive tract are reviewed in this paper with emphasis on the allele frequency and the impact on drug absorption, metabolism, and in vivo drug exposure. Additionally, preclinical and clinical models used to study the impact of transporter/enzyme SNPs on protein expression and function are also reviewed. The results showed that allele frequency of the major drug efflux transporters and the major intestinal metabolic enzymes are highly different in different races, leading to different drug disposition and exposure. The conclusion is that genetic polymorphism is frequently observed in different races and the related protein expression and drug absorption/metabolism function and drug in vivo exposure can be significantly affected, resulting in variations in drug response. Basic research on race-dependent drug absorption/metabolism is expected, and FDA regulations of drug dosing adjustment based on racial disparity are suggested.
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Affiliation(s)
- Song Gao
- Department of Pharmaceutical Science, College of Pharmacy and Health Sciences, Texas Southern University, 3100 Cleburne Street, Houston, TX 77004, USA; (E.C.B.); (Y.Z.); (D.L.)
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14
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Qureshi NQ, Mufarrih SH, Bloomfield GS, Tariq W, Almas A, Mokdad AH, Bartlett J, Nisar I, Siddiqi S, Bhutta Z, Mark D, Douglas PS, Samad Z. Disparities in Cardiovascular Research Output and Disease Outcomes among High-, Middle- and Low-Income Countries - An Analysis of Global Cardiovascular Publications over the Last Decade (2008-2017). Glob Heart 2021; 16:4. [PMID: 33598384 PMCID: PMC7845477 DOI: 10.5334/gh.815] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 12/08/2020] [Indexed: 11/20/2022] Open
Abstract
Background Cardiovascular disease (CVD) is the leading cause of death and disability worldwide. Health research is crucial to managing disease burden. Previous work has highlighted marked discrepancies in research output and disease burden between high-income countries (HICs) and low- and lower-middle-income countries (LI-LMICs) and there is little data to understand whether this gap has bridged in recent years. We conducted a global, country level bibliometric analysis of CVD publications with respect to trends in disease burden and county development indicators. Methods A search filter with a precision and recall of 0.92 and 0.91 respectively was developed to extract cardiovascular publications from the Web of Science (WOS) for the years 2008-2017. Data for disease burden and country development indicators were extracted from the Global Burden of Disease and the World Bank database respectively. Results Our search revealed 847,708 CVD publications for the period 2008-17, with a 43.4% increase over the decade. HICs contributed 81.1% of the global CVD research output and accounted for 8.1% and 8.5% of global CVD DALY losses deaths respectively. LI-LMICs contributed 2.8% of the total output and accounted for 59.5% and 57.1% global CVD DALY losses and death rates. Conclusions A glaring disparity in research output and disease burden persists. While LI-LMICs contribute to the majority of DALYs and mortality from CVD globally, their contribution to research output remains the lowest. These data call on national health budgets and international funding support to allocate funds to strengthen research capacity and translational research to impact CVD burden in LI-LMICs.
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Affiliation(s)
| | | | - Gerald S. Bloomfield
- Division of Cardiology, Department of Medicine, Duke University, Durham, NC, US
- Duke Clinical Research Institute, Duke University, Durham, NC, US
- Duke Global Health Institute, Duke University, Durham, NC, US
| | - Wajeeha Tariq
- Department of Medicine, The Aga Khan University, Karachi, PK
| | - Aysha Almas
- Department of Medicine, The Aga Khan University, Karachi, PK
| | - Ali H. Mokdad
- Department of Health Metrics Sciences, University of Washington, Seattle, WA, US
| | - John Bartlett
- Duke Global Health Institute, Duke University, Durham, NC, US
| | - Imran Nisar
- Department of Pediatrics and Child Health, The Aga Khan University, Karachi, PK
| | - Sameen Siddiqi
- Department of Community Health Sciences, The Aga Khan University, Karachi PK
| | - Zulfiqar Bhutta
- Centre of Excellence in Women and Child Health, Aga Khan University, Karachi, PK
- Centre for Global Child Health, The Hospital for Sick Children, Toronto, ON, CA
- University of Toronto, Toronto, ON, CA
| | - Daniel Mark
- Duke Clinical Research Institute, Duke University, Durham, NC, US
| | | | - Zainab Samad
- Department of Medicine, The Aga Khan University, Karachi, PK
- Division of Cardiology, Department of Medicine, Duke University, Durham, NC, US
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15
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Cohen I, Lema MJ. What's new in chronic pain pathophysiology. CANADIAN JOURNAL OF PAIN-REVUE CANADIENNE DE LA DOULEUR 2020; 4:13-18. [PMID: 33987515 PMCID: PMC7942794 DOI: 10.1080/24740527.2020.1752641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The understanding of pain pathophysiology is continuously evolving. Identifying underlying cellular and subcellular pathways helps create opportunities for targeted therapies that may prove to be effective interventions. This article is an update on four areas of developing knowledge as it pertains to clinical management of patients with pain: nerve growth factor antagonists, microglial modulation, AMP-activated protein kinase activators, and genetic pain factors. Each of these areas represents novel targets for targeted therapies to prevent, treat, and modify the disease course of acute, chronic, and neuropathic pain. Currently most pain management techniques do not target these pathways directly, but there is promising evidence to suggest that the field is advancing toward available therapies in the near future.
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Affiliation(s)
- Ivan Cohen
- Department of Anesthesiology, Jacobs School of Medicine, SUNY University at Buffalo and Biomedical Sciences, Buffalo, New York, USA
| | - Mark J Lema
- Department of Anesthesiology, Jacobs School of Medicine, SUNY University at Buffalo and Biomedical Sciences, Buffalo, New York, USA
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Kanacher T, Lindauer A, Mezzalana E, Michon I, Veau C, Mantilla JDG, Nock V, Fleury A. A Physiologically-Based Pharmacokinetic (PBPK) Model Network for the Prediction of CYP1A2 and CYP2C19 Drug-Drug-Gene Interactions with Fluvoxamine, Omeprazole, S-mephenytoin, Moclobemide, Tizanidine, Mexiletine, Ethinylestradiol, and Caffeine. Pharmaceutics 2020; 12:pharmaceutics12121191. [PMID: 33302490 PMCID: PMC7764797 DOI: 10.3390/pharmaceutics12121191] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/27/2020] [Accepted: 12/01/2020] [Indexed: 12/17/2022] Open
Abstract
Physiologically-based pharmacokinetic (PBPK) modeling is a well-recognized method for quantitatively predicting the effect of intrinsic/extrinsic factors on drug exposure. However, there are only few verified, freely accessible, modifiable, and comprehensive drug–drug interaction (DDI) PBPK models. We developed a qualified whole-body PBPK DDI network for cytochrome P450 (CYP) CYP2C19 and CYP1A2 interactions. Template PBPK models were developed for interactions between fluvoxamine, S-mephenytoin, moclobemide, omeprazole, mexiletine, tizanidine, and ethinylestradiol as the perpetrators or victims. Predicted concentration–time profiles accurately described a validation dataset, including data from patients with genetic polymorphisms, demonstrating that the models characterized the CYP2C19 and CYP1A2 network over the whole range of DDI studies investigated. The models are provided on GitHub (GitHub Inc., San Francisco, CA, USA), expanding the library of publicly available qualified whole-body PBPK models for DDI predictions, and they are thereby available to support potential recommendations for dose adaptations, support labeling, inform the design of clinical DDI trials, and potentially waive those.
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Affiliation(s)
- Tobias Kanacher
- SGS-Exprimo, 2800 Mechelen, Belgium; (T.K.); (A.L.); (E.M.); (I.M.)
| | - Andreas Lindauer
- SGS-Exprimo, 2800 Mechelen, Belgium; (T.K.); (A.L.); (E.M.); (I.M.)
| | - Enrica Mezzalana
- SGS-Exprimo, 2800 Mechelen, Belgium; (T.K.); (A.L.); (E.M.); (I.M.)
| | - Ingrid Michon
- SGS-Exprimo, 2800 Mechelen, Belgium; (T.K.); (A.L.); (E.M.); (I.M.)
| | - Celine Veau
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397 Biberach an der Riß, Germany; (C.V.); (J.D.G.M.); (V.N.)
| | - Jose David Gómez Mantilla
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397 Biberach an der Riß, Germany; (C.V.); (J.D.G.M.); (V.N.)
| | - Valerie Nock
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397 Biberach an der Riß, Germany; (C.V.); (J.D.G.M.); (V.N.)
| | - Angèle Fleury
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397 Biberach an der Riß, Germany; (C.V.); (J.D.G.M.); (V.N.)
- Correspondence: ; Tel.: +49-7351-54-96020
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17
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Carvalho Henriques B, Yang EH, Lapetina D, Carr MS, Yavorskyy V, Hague J, Aitchison KJ. How Can Drug Metabolism and Transporter Genetics Inform Psychotropic Prescribing? Front Genet 2020; 11:491895. [PMID: 33363564 PMCID: PMC7753050 DOI: 10.3389/fgene.2020.491895] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 09/25/2020] [Indexed: 12/11/2022] Open
Abstract
Many genetic variants in drug metabolizing enzymes and transporters have been shown to be relevant for treating psychiatric disorders. Associations are strong enough to feature on drug labels and for prescribing guidelines based on such data. A range of commercial tests are available; however, there is variability in included genetic variants, methodology, and interpretation. We herein provide relevant background for understanding clinical associations with specific variants, other factors that are relevant to consider when interpreting such data (such as age, gender, drug-drug interactions), and summarize the data relevant to clinical utility of pharmacogenetic testing in psychiatry and the available prescribing guidelines. We also highlight areas for future research focus in this field.
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Affiliation(s)
| | - Esther H. Yang
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
| | - Diego Lapetina
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
| | - Michael S. Carr
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
| | - Vasyl Yavorskyy
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
| | - Joshua Hague
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
| | - Katherine J. Aitchison
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB, Canada
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18
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Quignot N, Więcek W, Lautz L, Dorne JL, Amzal B. Inter-phenotypic differences in CYP2C9 and CYP2C19 metabolism: Bayesian meta-regression of human population variability in kinetics and application in chemical risk assessment. Toxicol Lett 2020; 337:111-120. [PMID: 33232775 DOI: 10.1016/j.toxlet.2020.11.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/13/2020] [Accepted: 11/19/2020] [Indexed: 01/23/2023]
Abstract
Quantifying variability in pharmacokinetics (PK) and toxicokinetics (TK) provides a science-based approach to refine uncertainty factors (UFs) for chemical risk assessment. In this context, genetic polymorphisms in cytochromes P450 (CYPs) drive inter-phenotypic differences and may result in reduction or increase in metabolism of drugs or other xenobiotics. Here, an extensive literature search was performed to identify PK data for probe substrates of the human polymorphic isoforms CYP2C9 and CYP2C19. Relevant data from 158 publications were extracted for markers of chronic exposure (clearance and area under the plasma concentration-time curve) and analysed using a Bayesian meta-regression model. Enzyme function (EF), driven by inter-phenotypic differences across a range of allozymes present in extensive and poor metabolisers (EMs and PMs), and fraction metabolised (Fm), were identified as exhibiting the highest impact on the metabolism. The Bayesian meta-regression model provided good predictions for such inter-phenotypic differences. Integration of population distributions for inter-phenotypic differences and estimates for EF and Fm allowed the derivation of CYP2C9- and CYP2C19-related UFs which ranged from 2.7 to 12.7, and were above the default factor for human variability in TK (3.16) for PMs and major substrates (Fm >60%). These results provide population distributions and pathway-related UFs as conservative in silico options to integrate variability in CYP2C9 and CYP2C19 metabolism using in vitro kinetic evidence and in the absence of human data. The future development of quantitative extrapolation models is discussed with particular attention to integrating human in vitro and in vivo PK or TK data with pathway-related variability for chemical risk assessment.
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Affiliation(s)
| | | | - Leonie Lautz
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Maisons-Alfort, France
| | - Jean-Lou Dorne
- European Food Safety Authority, Via Carlo Magno 1A, 43126, Parma, Italy
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Hojo M, Asaoka D, Takeda T, Shimada Y, Matsumoto K, Matsumoto K, Yatagai N, Akazawa Y, Ueda K, Ueyama H, Nagahara A. Randomized controlled study on the effects of triple therapy including vonoprazan or rabeprazole for the second-line treatment of Helicobacter pylori infection. Therap Adv Gastroenterol 2020; 13:1756284820966247. [PMID: 33240391 PMCID: PMC7675913 DOI: 10.1177/1756284820966247] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 09/22/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND AND AIM Inhibition of gastric acid secretion is important for eradicating Helicobacter pylori. Vonoprazan (VPZ) is a strong, long-lasting inhibitor of gastric acid secretion. Studies that examined the effectiveness of VPZ-based triple therapy in second-line treatment have been performed. However, there have been no randomized controlled studies to compare the effect between VPZ-based triple therapy and proton pump inhibitor (PPI)-based triple therapy in second-line treatment, and it is not known which is more effective between VPZ-based and PPI-based therapies. This study aimed to compare the effectiveness of second-line triple therapies including VPZ or rabeprazole (RPZ) as the PPI. METHODS Eligible patients with H. pylori infection who failed first-line triple therapy were assigned randomly to the VPZ [VPZ40 mg/day, amoxicillin (AMPC) 1500 mg/day, metronidazole (MNZ) 500 mg/day] or RPZ (RPZ20 mg/day, AMPC1500 mg/day, MNZ500 mg/day) group. A 13C-urea breath test result of less than 2.5% was considered as successful eradication. RESULTS In total, 46 and 41 patients were analyzed as intention to treat (ITT) and per protocol (PP), respectively. Eradication rates in the VPZ and RPZ groups were 73.9% [95% confidence interval (CI) 51.6-89.8%] and 82.6% (95% CI 61.2-95.0%) based on ITT analysis, respectively (p = 0.72). Based on PP analysis, the eradication rates in the VPZ and RPZ groups were 89.5% (95% CI 66.9-98.7%) and 86.4% (95% CI 65.1-97.1%), respectively (p = 1.00). Two patients in the VPZ group and one in the RPZ group discontinued treatment due to side effects (p = 1.00). CONCLUSION There were no significant differences in efficacy and safety between second-line therapies including VPZ or RPZ.
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Affiliation(s)
| | - Daisuke Asaoka
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Tsutomu Takeda
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Yuji Shimada
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kenshi Matsumoto
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kohei Matsumoto
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Noboru Yatagai
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Yoichi Akazawa
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kumiko Ueda
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Hiroya Ueyama
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Akihito Nagahara
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
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20
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Teixeira-da-Silva P, Santos-Buelga D, Otero MJ, García MJ. Population pharmacokinetics of phenobarbital in Caucasian patients with epilepsy. Eur J Pharm Sci 2020; 153:105484. [PMID: 32707172 DOI: 10.1016/j.ejps.2020.105484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 06/16/2020] [Accepted: 07/20/2020] [Indexed: 11/30/2022]
Abstract
The present study aimed to establish a population pharmacokinetic (PopPK) model of Phenobarbital (PB) in Caucasian patients with epilepsy included in a Therapeutic Drug Monitoring program. In total, 855 PB serum concentrations (steady-state trough concentrations) were retrospectively collected during routine clinical monitoring of 395 patients over 15 years of age with epilepsy. The PopPK analysis was performed with NONMEM using a non-linear mixed-effect modelling approach. The influence of demographic, anthropometric, treatment, and comedication variables on the apparent clearance (CL/F) of PB were analysed. Goodness of fit plots and the bootstrap method were performed to evaluate the final model. External validation was carried out using an independent group of patients (107 patients, 178 blood samples). A one-compartment model with first-order absorption and elimination successfully described the data. In the final model, CL/F included body surface area (BSA) and comedication with phenytoin (PHT) and valproic acid (VPA), resulting in the following equation: CL/F[L/h]=(0.236+(0.115×(BSA-1.7)))×(0.822PHT)×(0.711VPA) The model presents acceptable estimation errors in the parameters of fixed (<12%) and random effects (<13%), and of the shrinkage values (<21%). Internal and external validations demonstrated the good predictability of the final model. A PopPK model of PB in Caucasian patients over 15 years of age was successfully established, which can be used to estimate phenobarbital CL/F. BSA and drug-drug interactions with PHT and VPA should be incorporated into dosing decisions. This PopPK, using Bayesian algorithms, could help establish an optimal dosage regimen in routine patient care.
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Affiliation(s)
- Paulo Teixeira-da-Silva
- Department of Pharmaceutical Sciences, Pharmacy and Pharmaceutical Technology Section, Faculty of Pharmacy, Universidad de Salamanca, Campus Miguel de Unamuno, Calle Lic. Méndez Nieto, s/n, Salamanca, Spain.
| | - Dolores Santos-Buelga
- Department of Pharmaceutical Sciences, Pharmacy and Pharmaceutical Technology Section, Faculty of Pharmacy, Universidad de Salamanca, Campus Miguel de Unamuno, Calle Lic. Méndez Nieto, s/n, Salamanca, Spain
| | - María José Otero
- Department of Pharmaceutical Sciences, Pharmacy and Pharmaceutical Technology Section, Faculty of Pharmacy, Universidad de Salamanca, Campus Miguel de Unamuno, Calle Lic. Méndez Nieto, s/n, Salamanca, Spain; Pharmacy Service, University Hospital of Salamanca, Paseo de San Vicente, 182, Salamanca, Spain
| | - María José García
- Department of Pharmaceutical Sciences, Pharmacy and Pharmaceutical Technology Section, Faculty of Pharmacy, Universidad de Salamanca, Campus Miguel de Unamuno, Calle Lic. Méndez Nieto, s/n, Salamanca, Spain
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21
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Li LJ, Chong Q, Wang L, Cher GB, Soo RA. Different treatment efficacies and side effects of cytotoxic chemotherapy. J Thorac Dis 2020; 12:3785-3795. [PMID: 32802458 PMCID: PMC7399437 DOI: 10.21037/jtd.2019.08.63] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Differences in efficacy and toxicity between Asian and Caucasian patients with lung cancer treated with systemic chemotherapy is increasingly recognised. This is a major concern in the clinical setting as it influences outcomes and affect international harmonization of drug development. Interindividual variability of pharmacokinetics, where different genetic polymorphisms affect drug metabolism, transport, and receptor binding may account for the ethnic differences. Treatment efficacy and outcomes may also be explained by differences in diet and lifestyle, access to healthcare, cultural barriers and environmental exposure. Efforts made to design prospective studies investigating ethnic specific determinants to systemic therapy and individualise lung cancer treatment based on genetic makeup of patient are important.
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Affiliation(s)
- Low-Jia Li
- Department of Haematology-Oncology, National University Hospital, Singapore, Singapore
| | - Qingyun Chong
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Lingzhi Wang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, National University of Singapore, Singapore, Singapore
| | - Goh Boon Cher
- Department of Haematology-Oncology, National University Hospital, Singapore, Singapore.,Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, National University of Singapore, Singapore, Singapore
| | - Ross A Soo
- Department of Haematology-Oncology, National University Hospital, Singapore, Singapore
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22
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Almeman AA. Major CYP450 polymorphism Among Saudi Patients. Drug Metab Lett 2020; 14:17-24. [PMID: 32703145 DOI: 10.2174/1872312814666200722122232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/24/2020] [Accepted: 07/01/2020] [Indexed: 01/22/2023]
Abstract
BACKGROUND Cytochrome P450 (CYP) contributes to a huge collection of medicinal products' Phase I metabolization. We aimed to summarize and investigate the current evidence regarding the frequency of CYP2D6, CYP2C9, CYP2C19, MDR1 in Saudi Arabia. METHODS A computerized search in four databases was done using the relevant keywords. Screening process was done in two steps; title and abstract screening and full-text screening. Data of demographic and characteristics of included studies and patients was extracted and tabulated. RESULTS Ten studies were eligible for our criteria and were included in this systematic review. Age of participants ranged between 17-65 years. Only two subjects showed PM phenotype of CYP2C19 in Saudi population. The most frequent alleles were CYP2C19*1 (62.9%), CYP2C19*2 (11.2%-32%), and CYP2C19*17 (25.7%). The CYP2C19m1 was observed in 97 cases of extensive metabolizing (EM) phenotype CYP2C19. Concerning the CYP2C9, the most frequent alleles were CYP2C9*1 and CYP2C9*2, and the most frequent genotype was CYP2C9*1*1. The CYP2D6*41 allele and C1236T MDR1 were the most frequent allele in this population. CONCLUSION The current evidence suggests that Saudi Arabians resembled European in the frequency of CYP2C19, Caucasians in both the incidence of CYP2C9 and CYP2C19m1 and absence of CYP2C19m2. The CYP2D6*41 allele frequency in Saudi Arabians is relatively high. We recommend a further research to evaluate the basic and clinical relevance of gene polymorphism in such ethnicity.
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Affiliation(s)
- Ahmad Abdulrahman Almeman
- Clinical pharmacology and therapeutics Department, Qassim University, Buraydah, Qassim. Saudi Arabia
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Goudra B, Singh PM. Oliceridine and its potential to revolutionize GI endoscopy sedation. Saudi J Anaesth 2020; 14:349-354. [PMID: 32934628 PMCID: PMC7458022 DOI: 10.4103/sja.sja_813_19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/13/2020] [Accepted: 01/26/2020] [Indexed: 12/16/2022] Open
Abstract
Providing sedation to patients undergoing gastrointestinal (GI) endoscopy is a controversial and emotive issue. The mainstay of sedation is propofol, whose administration is within the sole jurisdiction of anesthesia providers, at least in the USA. Attempts have been made to seize the authority by the GI community. One of the first attempts was the use of the prodrug of propofol -fospropofol. However, as the drug has a similar adverse effect profile as propofol in terms of respiratory depression, the FDA did not approve its use by providers other than those trained in airway management. Sedasys® was the next attempt, which was a computer-assisted personalized sedation system. As a result of insufficient sedation that could be provided with the device, although very successful in research settings, it was not a commercial success. It seems that remimazolam is the next effort in this direction. It is likely to fail in this regard unless its respiratory depressant properties and failure rates could be addressed. G protein-biased μ-receptor agonists are a new class of opioids exhibiting analgesic properties similar to morphine without equivalent respiratory depressant properties. Oliceridine is the prototype. As a result, the drug can be additive to midazolam or remimazolam and allow screening colonoscopy to be comfortably completed without the need for propofol. For an anesthesia provider, the administration of oliceridine can eliminate the need for drugs such as fentanyl that add to the respiratory depressant properties of propofol. As a result, oliceridine has the potential to render the sedation for GI endoscopy procedures both safe and cost-effective.
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Affiliation(s)
- Basavana Goudra
- Clinical Associate Professor of Anesthesiology and Critical Care Medicine, Perelman School of Medicine, Hospital of the University of Pennsylvania, 680 Dulles, 3400 Spruce Street, Philadelphia, PA, USA
| | - Preet Mohinder Singh
- Department of Anesthesiology, Washington University in Saint Louis, 660 South Euclid Avenue, St Louis, MO, USA
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Edamatsu H, Yagawa M, Ikushiro S, Sakaki T, Nakagawa Y, Miyagawa H, Akamatsu M. Identification and in silico prediction of metabolites of tebufenozide derivatives by major human cytochrome P450 isoforms. Bioorg Med Chem 2020; 28:115429. [PMID: 32201191 DOI: 10.1016/j.bmc.2020.115429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 11/18/2022]
Abstract
Cytochrome P450 (CYP) enzymes constitute a superfamily of heme-containing monooxygenases. CYPs are involved in the metabolism of many chemicals such as drugs and agrochemicals. Therefore, examining the metabolic reactions by each CYP isoform is important to elucidate their substrate recognition mechanisms. The clarification of these mechanisms may be useful not only for the development of new drugs and agrochemicals, but also for risk assessment of chemicals. In our previous study, we identified the metabolites of tebufenozide, an insect growth regulator, formed by two human CYP isoforms: CYP3A4 and CYP2C19. The accessibility of each site of tebufenozide to the reaction center of CYP enzymes and the susceptibility of each hydrogen atom for metabolism by CYP enzymes were evaluated by a docking simulation and hydrogen atom abstraction energy estimation at the density functional theory level, respectively. In this study, the same in silico prediction method was applied to the metabolites of tebufenozide derivatives by major human CYPs (CYP1A2, 2C9, 2C19, 2D6, and 3A4). In addition, the production rate of the metabolites by CYP3A4 was quantitively analyzed by frequency based on docking simulation and hydrogen atom abstraction energy using the classical QSAR approach. Then, the obtained QSAR model was applied to predict the sites of metabolism and the metabolite production order by each CYP isoform.
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Affiliation(s)
- Hiroaki Edamatsu
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Masataka Yagawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shinichi Ikushiro
- Faculty of Engineering, Toyama Prefectural University, 5180, Kurokawa, Imizu-shi, Toyama 939-0398, Japan
| | - Toshiyuki Sakaki
- Faculty of Engineering, Toyama Prefectural University, 5180, Kurokawa, Imizu-shi, Toyama 939-0398, Japan
| | - Yoshiaki Nakagawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hisashi Miyagawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Miki Akamatsu
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
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25
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Adu-Gyamfi KO, Gyamfi R, Patri S. An unusual case of proton pump inhibitor induced hyperchromograninemia. J Community Hosp Intern Med Perspect 2020; 9:511-514. [PMID: 32002161 PMCID: PMC6968679 DOI: 10.1080/20009666.2019.1682748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/18/2019] [Indexed: 11/24/2022] Open
Abstract
Objective: To describe an unusual case of symptomatic hyperchromograninemia associated with proton pump inhibitor (PPI) use. Case Summary: A 55-year-old man with stage 1 follicular lymphoma and GERD on omeprazole presented with symptoms suggesting carcinoid syndrome. The only positive finding on workup was a markedly elevated level of chromogranin A and no carcinoid tumor was identified. Omeprazole was discontinued, following which his symptoms resolved and chromogranin A levels returned to normal. To the best of our knowledge, no symptoms have been previously reported in association with PPI-induced hyperchromograninemia. Discussion: The reliability of chromogranin A as a marker for neuroendocrine tumors is of growing concern. The reasons for the associated symptomatology in this case are unclear but could involve physiologic effects of chromogranin A breakdown products. The role of pharmacogenomics in PPI metabolism is discussed as a potential explanation for the significant hyperchromograninemia. Conclusion: The phenomenon of PPI-induced hyperchromograninemia is highlighted for providers especially in the context of neuroendocrine tumor diagnosis and surveillance. The need for more research into chromogranins is proposed.
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Affiliation(s)
| | | | - Sandeep Patri
- Department of Hospitalist Medicine, HSHS St. Vincent Hospital, Green Bay, WI, USA
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26
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Wyska E. Pharmacokinetic considerations for current state-of-the-art antidepressants. Expert Opin Drug Metab Toxicol 2019; 15:831-847. [DOI: 10.1080/17425255.2019.1669560] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Elżbieta Wyska
- Department of Pharmacokinetics and Physical Pharmacy, Jagiellonian University Medical College, Kraków, Poland
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27
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Deguchi S, Yamashita T, Igai K, Harada K, Toba Y, Hirata K, Takayama K, Mizuguchi H. Modeling of Hepatic Drug Metabolism and Responses in CYP2C19 Poor Metabolizer Using Genetically Manipulated Human iPS cells. Drug Metab Dispos 2019; 47:632-638. [DOI: 10.1124/dmd.119.086322] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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28
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Bremer SCB, Reinhardt L, Sobotta M, Hasselluhn MC, Lorf T, Ellenrieder V, Schwörer H. Pantoprazole Does not Affect Serum Trough Levels of Tacrolimus and Everolimus in Liver Transplant Recipients. Front Med (Lausanne) 2018; 5:320. [PMID: 30510930 PMCID: PMC6253821 DOI: 10.3389/fmed.2018.00320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 10/30/2018] [Indexed: 12/27/2022] Open
Abstract
Background: Liver transplant recipients are frequently treated with proton pump inhibitors. Drug interactions have been described especially with respect to omeprazole. Due to the lower binding capacity of pantoprazole to CYP2C19 this drug became preferred and became the most used proton pump inhibitor in Germany. The data on the influence of pantoprazole on immunosuppressive drugs in liver transplant recipients a very scarce. Methods: The authors performed a single center analysis in liver transplant recipients on the effect of pantoprazole on the serum trough levels of different immunosuppressants. The trough levels were compared over a period of 1 year before and after start or stop of a continuous oral co-administration of 40 mg pantoprazole once daily. Results: The serum trough levels of tacrolimus (n = 30), everolimus (n = 7), or sirolimus (n = 3) remain constant during an observation period of at least 1 year before and after co-administration of pantoprazole. None of the included patients needed a change of dosage of the observed immunosuppressants during the observation period. Conclusions: The oral co-administration of pantoprazole is safe in immunosuppressed liver transplant recipients according to the serum trough levels of tacrolimus, everolimus, and sirolimus. This analysis provides first data on the influence of pantoprazole on immunosuppressive drugs in liver transplant recipients.
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Affiliation(s)
- Sebastian C B Bremer
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany.,Liver Center Goettingen, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany
| | - Lars Reinhardt
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany.,Liver Center Goettingen, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany
| | - Michael Sobotta
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany.,Clinic for Anesthesiology, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany
| | - Marie C Hasselluhn
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany
| | - Thomas Lorf
- Liver Center Goettingen, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany.,Clinic for General, Visceral and Pediatric Surgery, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany
| | - Volker Ellenrieder
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany.,Liver Center Goettingen, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany
| | - Harald Schwörer
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany.,Liver Center Goettingen, University Medical Center Goettingen, Georg-August-University, Goettingen, Germany
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29
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Puaprasert K, Chu C, Saralamba N, Day NPJ, Nosten F, White NJ, Dondorp AM, Imwong M. Real time PCR detection of common CYP2D6 genetic variants and its application in a Karen population study. Malar J 2018; 17:427. [PMID: 30442143 PMCID: PMC6238304 DOI: 10.1186/s12936-018-2579-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/09/2018] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Plasmodium vivax malaria is characterized by relapses arising from the hypnozoite stages in the liver. The only currently registered drug for radical treatment to prevent relapse is primaquine. Primaquine, a prodrug, requires metabolism through the liver cytochrome CYP2D6 isoenzyme to its active metabolite. Mutations in the CYP2D6 gene may thus affect primaquine efficacy. A SNPs genotyping technique was developed to characterize the CYP2D6 genetic variants and tested this in the patients with Plasmodium vivax infection collected in a Karen population on the Thailand-Myanmar border, where P. vivax malaria is endemic. METHODS Direct sequencing of PCR-reamplified products (DSP) was used to uncover exonic CYP2D6 sequence variations. Subsequently, an allele-specific oligonucleotide probe real-time SNPs genotyping (ASO) assay was developed for rapid detection of the four clinically relevant CYP2D6 variants occurring in this population. These two in-house developed assays were used to genotype CYP2D6 mutations in blood samples obtained from 70 Karen adults. RESULTS Results showed a high degree of concordance between the DSP and ASO methods. Six CYP2D6 point mutations were identified within the Karen population: C100T, C1039T, G1661C, G1846A, C2850T and G4180C, at frequencies of 0.43, 0.43, 0.76, 0.02, 0.32 and 0.76, respectively. The CYP2D6*2, *4, *5, *10 and *36 allelic frequencies were 0.33, 0.02, 0.03, 0.40 and 0.01, respectively. Alleles conferring an intermediate CYP2D6 metabolizer phenotype comprised 46% of the total number of alleles. CONCLUSION The newly developed ASO assay is a reliable and rapid tool for large-scale CYP2D6 genotyping. The high frequency of the CYP2D6*10 allele in the Karen population warrants further assessment of its association with the radical curative efficacy of primaquine.
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Affiliation(s)
- Kanokpich Puaprasert
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Cindy Chu
- Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Naowarat Saralamba
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Nicholas P J Day
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Francois Nosten
- Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Nicholas J White
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Arjen M Dondorp
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Mallika Imwong
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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30
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Cardia L, Calapai G, Quattrone D, Mondello C, Arcoraci V, Calapai F, Mannucci C, Mondello E. Preclinical and Clinical Pharmacology of Hydrocodone for Chronic Pain: A Mini Review. Front Pharmacol 2018; 9:1122. [PMID: 30327606 PMCID: PMC6174210 DOI: 10.3389/fphar.2018.01122] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 09/13/2018] [Indexed: 02/05/2023] Open
Abstract
Hydrocodone is one of the most prescribed oral analgesic drugs and it is one of the most abused drugs in general population. It is a mu-opioid agonist predominantly metabolized to the O-demethylated product hydromorphone and to the N-demethylated product norhydrocodone. The purpose of the study is to summarize the preclinical and clinical characteristics of hydrocodone. Pharmacokinetic aspect (terminal half-life, maximum serum concentration, and time to maximum serum concentration) of hydrocodone and the influence of metabolic genetic polymorphism in analgesic response to hydrocodone are also illustrated and commented. Literature on experimental preclinical pharmacology investigating analgesic activity in laboratory animals is furtherly discussed. Moreover, the authors discuss and comment on the updated data regarding safety profile and effectiveness of hydrocodone in the treatment of chronic pain. A bibliographic research was carried out (from February 01, 2018 to August 28, 2018) independently by two researchers (blinded to the authors and initially on results) in the major scientific databases and research engines of peer-reviewed literature on life sciences and biomedical topics, starting from January 1990 to August 2018. Analysis of results of clinical studies suggests that abuse-deterrent extended-release (ER) hydrocodone formulations can be effective and they are well tolerated in the treatment of chronic low back pain. Weaker is the evidence of the analgesic effectiveness of ER hydrocodone on other chronic pain syndromes and non-cancer non-neuropathic chronic pain. In these conditions, hydrocodone showed to have positive effects in non-controlled open studies and needs to be further studied to assess the real strength of results.
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Affiliation(s)
- Luigi Cardia
- Anesthesia, Intensive Care and Pain Therapy, Azienda Ospedaliera Universitaria Policlinico "G. Martino" - Messina, Messina, Italy
| | - Gioacchino Calapai
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Azienda Ospedaliera Universitaria Policlinico "G. Martino" - Messina, Messina, Italy
| | - Domenico Quattrone
- Pain Therapy Unit, Grande Ospedale Metropolitano Bianchi Melacrino Morelli-Reggio Calabria, Reggio Calabria, Italy
| | - Cristina Mondello
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Azienda Ospedaliera Universitaria Policlinico "G. Martino" - Messina, Messina, Italy
| | - Vincenzo Arcoraci
- Department of Clinical and Experimental Medicine, Azienda Ospedaliera Universitaria Policlinico "G. Martino" - Messina, Messina, Italy
| | - Fabrizio Calapai
- Pharma.Ca Research Facility (Centro Studi Pharma.Ca), Messina, Italy
| | - Carmen Mannucci
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Azienda Ospedaliera Universitaria Policlinico "G. Martino" - Messina, Messina, Italy
| | - Epifanio Mondello
- Anesthesia, Intensive Care and Pain Therapy, Azienda Ospedaliera Universitaria Policlinico "G. Martino" - Messina, Messina, Italy
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31
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Devault DA, Maguet H, Merle S, Péné-Annette A, Lévi Y. Wastewater-based epidemiology in low Human Development Index states: bias in consumption monitoring of illicit drugs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:27819-27838. [PMID: 30109683 DOI: 10.1007/s11356-018-2864-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
Wastewater-based epidemiology is a promising approach worldwide, and its application is currently being developed in non-advanced economies. This technology, based on known toxicokinetic data initially used to detect illicit drugs in well-managed and maintained local sewer networks, has been extended to assess other products such as pesticides, alcohol, flame retardants, nicotine, and other substances. This technology is also used in countries with non-advanced economies. The present review aims to support future wastewater-based epidemiology in such countries by providing toxicokinetic data for locally used narcotic drugs that are expected or known to be emerging in developed countries, outlining the excretion differences due to human polymorphism, and summarising the practical obstacles due to the coverage, maintenance efficiency, or type of local sewage network.Case study feedback from Martinique is presented as an example; the Martinique field study complies with the Organisation for Economic Co-operation and Development standards for health issues, but not with regard to population and urban dynamics.
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Affiliation(s)
- Damien A Devault
- Faculté de Pharmacie, Univ. Paris Sud, Univ. Paris Saclay, UMR 8079, CNRS, AgroParisTech, France, 5 rue J. B. Clement, 92290, Chatenay-Malabry, France.
| | - Hadrien Maguet
- Centre Hospitalier Universitaire de Martinique, CS 90632 - 97261, Fort-de-France Cedex, France
| | - Sylvie Merle
- Observatoire de la Santé de la Martinique, Immeuble Objectif 3000, Acajou sud, 97232, Le Lamentin, Martinique
| | - Anne Péné-Annette
- Laboratoire EA 929 AIHP-GEODE-BIOSPHERES Campus Universitaire de Schœlcher, 97275, Schœlcher, France
| | - Yves Lévi
- Faculté de Pharmacie, Univ. Paris Sud, Univ. Paris Saclay, UMR 8079, CNRS, AgroParisTech, France, 5 rue J. B. Clement, 92290, Chatenay-Malabry, France
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32
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Lee HI, Byeon JY, Kim YH, Lee CM, Choi CI, Jang CG, Bae JW, Lee YJ, Lee SY. Effects of CYP2C19 and CYP3A5 genetic polymorphisms on the pharmacokinetics of cilostazol and its active metabolites. Eur J Clin Pharmacol 2018; 74:1417-1426. [DOI: 10.1007/s00228-018-2522-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/09/2018] [Indexed: 10/28/2022]
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Qin Z, Li S, Yao Z, Hong X, Xu J, Lin P, Zhao G, Gonzalez FJ, Yao X. Metabolic profiling of corylin in vivo and in vitro. J Pharm Biomed Anal 2018; 155:157-168. [PMID: 29631076 DOI: 10.1016/j.jpba.2018.03.047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 03/12/2018] [Accepted: 03/22/2018] [Indexed: 12/18/2022]
Abstract
Corylin, an phenolic compound from Psoralea corylifolia, has been reported with various pharmacological properties but has poor bioavailability due to massive metabolism. In this study, twelve metabolites of corylin mainly involving in oxidation, hydration, glucuronidation and sulfation were detected in mice. Furthermore, the oxidation and hydration of corylin (M4) in human liver microsomes (HLM) and human intestine microsomes (HIM) were both efficient with high CLint (intrinsic clearance) values of 24.29 and 42.85 μL/min/mg, respectively. CYP1A1, 1B1 and 2C19 contributed most for M4 with the CLint values of 26.63, 33.09 and 132.41 μL/min/mg, respectively. Besides, M4 was strongly correlated with phenacetin-N-deacetylation (r = 0.885, p = 0.0001) and tolbutamide-4-oxidation (r = 0.727, p = 0.001) in twelve individual HLMs, respectively. In addition, corylin was efficiently glucuronidated (M7) in HLM (125.33 μL/min/mg) and in HIM (108.74 μL/min/mg). UGT1A1 contributed the most for M7 with the CLint value of 122.32 μL/min/mg. Meanwhile, M7 was significantly correlated with β-estradiol-3-O-glucuronidation (r = 0.742, p = 0.006) in twelve individual HLMs. Moreover, the metabolism of corylin showed marked species differences. Taken together, corylin was subjected to massive first-pass metabolism in liver and intestine, while CYP1A1, 1B1, 2C19 and UGT1A1 were the main contributors. Finally, the proposed metabolic pathway of corylin involed CYP and UGT isoforms were summarized, which could help to understand the metabolic fate of corylin in vivo.
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Affiliation(s)
- Zifei Qin
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Integrated Chinese and Western Medicine Postdoctoral research station, Jinan University, Guangzhou 510632, PR China
| | - Shishi Li
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Zhihong Yao
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China.
| | - Xiaodan Hong
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Jinjin Xu
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Pei Lin
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Guoping Zhao
- Integrated Chinese and Western Medicine Postdoctoral research station, Jinan University, Guangzhou 510632, PR China
| | - Frank J Gonzalez
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Xinsheng Yao
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Integrated Chinese and Western Medicine Postdoctoral research station, Jinan University, Guangzhou 510632, PR China.
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Fossler MJ, Sadler BM, Farrell C, Burt DA, Pitsiu M, Skobieranda F, Soergel DG. Oliceridine, a Novel G Protein-Biased Ligand at the μ-Opioid Receptor, Demonstrates a Predictable Relationship Between Plasma Concentrations and Pain Relief. II: Simulation of Potential Phase 3 Study Designs Using a Pharmacokinetic/Pharmacodynamic Model. J Clin Pharmacol 2018; 58:762-770. [PMID: 29393971 DOI: 10.1002/jcph.1075] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/07/2017] [Indexed: 11/10/2022]
Abstract
Oliceridine is a novel G protein-biased ligand at the μ-opioid receptor that differentially activates G protein coupling while mitigating β-arrestin recruitment. Unlike morphine, oliceridine has no known active metabolites; therefore, analgesic efficacy is predictably linked to its concentration in the plasma. Oliceridine is primarily hepatically metabolized by CYP3A4 and CYP2D6. Using a pharmacokinetic/pharmacodynamic model relating oliceridine plasma concentrations to its effect on pain intensity as measured by numeric pain-rating scale (NPRS) scores, we have simulated potential dosing regimens using both fixed-dose regimens and as-needed (prn) dosing regimens in which various doses of oliceridine were administered if NPRS scores indicated moderate to severe pain (≥4 on a 0-10 scale). In addition, regimens in which oliceridine was self-administered via a patient-controlled analgesia device were also simulated. The simulated population included 10% CYP2D6 poor metabolizers (PM). The simulation results suggest that oliceridine doses of 1-3 mg prn should be effective in reducing NPRS scores relative to placebo. The simulations also revealed that a 1-mg "supplemental dose" given 0.25 hour after the loading dose would decrease NPRS scores further in almost one-third of patients. In addition, if oliceridine is administered prn, a longer interval between doses is observed in simulated PM patients, consistent with their reduced oliceridine clearance. Because this longer average dosing interval is predicted to decrease oliceridine exposure in PM patients, the need to know the patient's CYP2D6 genotype for dosing is effectively obviated.
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Pharmacokinetics of CYP2C9, CYP2C19, and CYP2D6 substrates in healthy Chinese and European subjects. Eur J Clin Pharmacol 2017; 74:285-296. [PMID: 29181698 DOI: 10.1007/s00228-017-2375-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 11/08/2017] [Indexed: 01/16/2023]
Abstract
PURPOSE The aim of this analysis is to compare the pharmacokinetics of drug substrates in healthy Chinese and European subjects of aligned CYP2C9, CYP2C19, or CYP2D6 enzyme activity, providing further insight into drivers of interethnic differences in pharmacokinetics. METHODS Following identification of appropriate drug substrates, a comprehensive and structured literature search was conducted to identify single-dose pharmacokinetic data in healthy Chinese or European subjects with reported CYP2C9, CYP2C19, or CYP2D6 activity (genotype or phenotype). The ratio of drug AUC in the Chinese and European subjects classified with aligned enzyme activity was calculated (ethnicity ratio (ER)). RESULTS For 22/25 drugs identified, the ERs calculated indicated no or only limited interethnic differences in exposure (<twofold) in Chinese and European subjects with aligned polymorphic enzyme activity. The interethnic differences observed can reflect differences across populations in additional determinants of pharmacokinetics, although the notable between study variation and change over time in methods used to assign enzyme activity may also be contributing factors. There was no association between drug substrate fraction metabolized (fm) for CYP2C9, CYP2C19, or CYP2D6 and the ERs calculated. CONCLUSION The spectrum of pharmacokinetic determinants for each drug substrate and their differences across ethnic groups must be considered on a case-by-case basis in addition to metabolism by CYP2C9, CYP2C19, or CYP2D6. This analysis has also highlighted the challenges which arise when comparing published datasets if consistent methods to assign polymorphic enzyme activity have not been used.
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Gates BJ, Davies NM. AmpliChip for Cytochrome P-450 Genotyping: The Epoch of Personalized Prescriptions. Hosp Pharm 2017. [DOI: 10.1310/hpj4105-442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The clinical importance of genetic polymorphisms in drug metabolism is well-known in clinical pharmacotherapy. The first widely available pharmacogenomic microarray technology approved by the Food and Drug Administration as a medical device to clinically genotype genetic polymorphisms in drug metabolism is now available with the launch of AmpliChip technology. This readily accessible clinical microarray test allows the genotyping of cytochrome (CYP) P-450 2D6 and 2C19 and marks a milestone in the epoch of evidence based personalized medicine. Many commonly used drugs are substrates for CYP2D6 and CYP 2C19 and hence may potentially demonstrate phenotypic differences as poor, intermediate, extensive, and ultrarapid metabolizers. These phenotypic variations could lead to expressed differences in pharmacotherapeutic patient outcomes. AmpliChip currently allows for testing of multiple alleles (31) in a single assay. Other technologies for pharmacogenomics are on the horizon. This article reviews the importance of polymorphic enzymes and genotyping as to how genetic polymorphisms alter pharmacotherapy and the emergence of a plethora of technologies that may become routinely available for clinical pharmacogenomic testing in the near future.
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Affiliation(s)
- Brian J. Gates
- College of Pharmacy Departments of Pharmacotherapy and Pharmaceutical Sciences Washington State University, Spokane/Pullman, WA 99164-6534
| | - Neal M. Davies
- College of Pharmacy Departments of Pharmacotherapy and Pharmaceutical Sciences Washington State University, Spokane/Pullman, WA 99164-6534
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Vieira JL, Ferreira MES, Ferreira MVD, Gomes MM. Primaquine in Plasma and Methemoglobinemia in Patients with Malaria Due to Plasmodium vivax in the Brazilian Amazon Basin. Am J Trop Med Hyg 2017; 96:1171-1175. [PMID: 28440745 DOI: 10.4269/ajtmh.15-0368] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
AbstractPrimaquine is the only licensed drug available for the elimination of Plasmodium vivax hypnozoites. Methemoglobinemia is currently reported in the course of treatment. There is evidence that metabolites of primaquine formed by the cytochrome pathway are responsible for methemoglobin formation; a genetic polymorphism of cytochrome isoforms; and a potential influence of gender in the activities of these enzymes requiring the establishment of dose × response curves profiles in different population groups. Concentrations of primaquine in plasma and methemoglobin levels were investigated in 54 patients with malaria due to P. vivax during the course of the standard regimen of chloroquine with primaquine (0.25 mg/kg/day for 14 days). All study subjects lived in an endemic area of the Brazilian Amazon Basin. The blood samples were collected before initiation of treatment and 3 hours (range 2-4 hours) after the administration of antimalarial drugs on days 2, 7, and 14. Plasma primaquine concentrations were similar in both genders (males: range = 164-191 ng/mL, females: range = 193-212 ng/mL). Methemoglobin levels ranged from 3.3% to 5.9% in males and from 3.1% to 6.5% in females. There were no significant correlations between the plasma primaquine concentrations or total dose and methemoglobin levels, suggesting that unidentified metabolites rather than parent drug were likely responsible for changes in methemoglobin levels. There was no significant influence of gender on primaquine concentrations in plasma or methemoglobin levels.
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Affiliation(s)
| | | | | | - Margarete M Gomes
- Laboratório Central Macapa, Secretaria de Estado da Saúde do Amapá, Amapá, Brazil
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Abstract
Opioid analgesics are among the most commonly prescribed medications. Frequently, they are combined with other therapeutic agents and pharmacodynamic or pharmacokinetic interactions may ensue. This review summarizes published case reports and studies of potential opioid drug interactions. A MED-LINE computer literature search (1966-1998) was undertaken to retrieve all pertinent case reports and studies of opioid drug interactions published in the English language. The results of the search indicate that numerous compounds from various therapeutic classes may participate in clinically significant pharmacodynamic and pharmacokinetic drug-drug interactions. Pharmacodynamic interactions usually involved additive central nervous system depression. Additionally, propoxyphene and tramadol can potentiate a hyperserotonergic state when coadministered with the SSRIs and MAOIs. Pharmacokinetic interactions typically involved inhibition or induction by specific hepatic cytochrome P-450 isoenzymes. Agents with enzyme inhibiting ability such as erythromycin, cimetidine, and selective serotonin reuptake inhibitors have been shown to potentiate the effects of certain opioid analgesics while codeine, which requires metabolic conversion via CYP 2D6 for pharmacological effectiveness, has reduced analgesic efficacy in the presence of inhibitors. The enzyme inducers rifampin and several anticonvulsants have been involved in the emergence of methadone withdrawal when added to existing methadone treatment. Additionally, enzyme inducers can increase the formation of the toxic metabolite of meperidine. Genetic polymorphism also potentially impacts the effectiveness of agents such as codeine since reduced active metabolite formation and analgesic efficacy has been demonstrated in individuals who lack CYP 2D6 activity.
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Affiliation(s)
- Heidi L. Liston
- The Institute of Psychiatry, Medical University of South Carolina, 850 MUSC Complex, Room 540N, Charleston, SC 29425
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Jaja C, Barrett N, Patel N, Lyon M, Xu H, Kutlar A. Progressing Preemptive Genotyping of CYP2C19 Allelic Variants for Sickle Cell Disease Patients. Genet Test Mol Biomarkers 2016; 20:609-615. [PMID: 27551817 DOI: 10.1089/gtmb.2016.0001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
AIMS Interindividual variability in drug response and adverse effects have been described for proton pump inhibitors, anticonvulsants, selective serotonin reuptake inhibitors, tricyclic antidepressants, and anti-infectives, but little is known about the safety and efficacy of these medications in patients with sickle cell disease (SCD). We genotyped the CYP2C19 gene which has been implicated in the metabolism of these drugs in an SCD patient cohort to determine the frequencies of reduced function, increased function, or complete loss-of-function variants. MATERIALS AND METHODS DNAs from 165 unrelated SCD patients were genotyped for nine CYP2C19 (*2, *3, *4, *5, *6, *7,*8, *12, and *17) alleles using the iPLEX® ADME PGx multiplex panel. RESULTS Three CYP2C19 alleles (*2, *12, and *17) were detected with the following frequencies: 0.209, 0.006, and 0.236, respectively. The predicted phenotype frequencies were distributed as extensive (31.5%), intermediate (24.8%), poor (5.5%), ultrarapid (30.3%), and unknown metabolizers (7.9%). DISCUSSION Prognostic genotyping is potentially useful for identifying SCD patients with allelic variants linked to proven clinical pharmacokinetic consequences for several drugs metabolized by the CYP2C19 gene. However, the main challenge to implementing a genetics-guided prescribing practice is ensuring concordance between CYP2C19 genotypes and metabolic phenotypes in SCD patients.
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Affiliation(s)
- Cheedy Jaja
- 1 College of Nursing, University of Cincinnati , Cincinnati, Ohio
| | - Nadine Barrett
- 2 Department of Medicine, Georgia Regents University , Augusta, Georgia
| | - Niren Patel
- 2 Department of Medicine, Georgia Regents University , Augusta, Georgia
| | - Matt Lyon
- 3 Department of Emergency Medicine, Georgia Regents University , Augusta, Georgia
| | - Hongyan Xu
- 4 Department of Biostatistics, Georgia Regents University , Augusta, Georgia
| | - Abdullah Kutlar
- 2 Department of Medicine, Georgia Regents University , Augusta, Georgia
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Response to Keszthelyi et al. Am J Gastroenterol 2016; 111:1036-7. [PMID: 27356831 DOI: 10.1038/ajg.2016.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Comparing cytochrome P450 pharmacogenetic information available on United States drug labels and European Union Summaries of Product Characteristics. THE PHARMACOGENOMICS JOURNAL 2016; 17:488-493. [PMID: 27241061 DOI: 10.1038/tpj.2016.40] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 04/04/2016] [Accepted: 05/02/2016] [Indexed: 12/12/2022]
Abstract
Regulatory agencies are increasing the pharmacogenomic information in their official drug labeling. However, despite the importance of regulatory harmonization, this implementation may not be running in parallel among major agencies. Comparing labeling of medicines approved by different agencies may identify gaps to solve. Our study compared the cytochrome P450 pharmacogenetic information included in the United States (US) Food and Drug Administration (FDA) drug labels and European Union (EU) Summaries of Product Characteristics (SmPCs). US labels presented significantly more specific pharmacogenetic subheadings (51 vs 26%), more prevalence and pharmacokinetic data for each metabolic phenotype (59 vs 25% and 82 vs 48%, respectively) and more applicable information about dose modifications required (25 vs 5%). Approximately 75% of the US labels evaluated scored higher on the overall quality than the analogous EU SmPCs, and this difference was not associated with the time since the EU SmPCs' last review. To enhance harmonization, regulatory agencies should simultaneously introduce the pharmacogenetic information in their drug labeling.
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Multicenter Study of Antibiotic Resistance Profile of H. pylori and Distribution of CYP2C19 Gene Polymorphism in Rural Population of Chongqing, China. Gastroenterol Res Pract 2016; 2016:8547686. [PMID: 27247569 PMCID: PMC4876203 DOI: 10.1155/2016/8547686] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/05/2016] [Accepted: 04/11/2016] [Indexed: 02/06/2023] Open
Abstract
This study was to investigate the antibiotic resistance profile of H. pylori and the distribution of CYP2C19 gene polymorphism in rural population of Chongqing, China. 214 and 111 strains of H. pylori were isolated from rural and urban patients, respectively. 99.53%, 20.09%, and 23.36% of the isolates in rural patients were found to be resistant to metronidazole, clarithromycin, and levofloxacin, while the resistant rate in urban patients was 82.88%, 19.82%, and 24.32%. The multiple antibiotic resistance percentage significantly increased from 28.26% (below 45 years) to 41.80% (above 45 years) in rural patients. Up to 44.39%, 45.79%, and 9.81% of rural patients from whom H. pylori was isolated were found to be extensive metabolizers, intermediate metabolizers, and poor metabolizers. No correlation was observed between antibiotic resistance profile of H. pylori and genetic polymorphism of CYP2C19 among rural population. There was a high prevalence of H. pylori strains resistant to metronidazole, clarithromycin, and levofloxacin in rural patients in Chongqing, China. The choice of therapy in this area should be based on local susceptibility patterns. Amoxicillin, gentamicin, and furazolidone are recommended as the first-line empiric regimen.
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Cytochrome allelic variants and clopidogrel metabolism in cardiovascular diseases therapy. Mol Biol Rep 2016; 43:473-84. [DOI: 10.1007/s11033-016-3983-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 04/04/2016] [Indexed: 01/18/2023]
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Vevelstad M, Øiestad EL, Bremer S, Bogen IL, Zackrisson AL, Arnestad M. Is toxicity of PMMA (paramethoxymethamphetamine) associated with cytochrome P450 pharmacogenetics? Forensic Sci Int 2016; 261:137-47. [PMID: 26930544 DOI: 10.1016/j.forsciint.2016.02.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 01/22/2016] [Accepted: 02/13/2016] [Indexed: 11/30/2022]
Abstract
In 2010-2013, 29 fatal intoxications related to the designer drug paramethoxymethamphetamine (PMMA, 4-methoxymethamphetamine) occurred in Norway. The current knowledge about metabolism and toxicity of PMMA in humans is limited. Metabolism by the polymorphic cytochrome P450 (CYP) 2D6 enzyme to the psychoactive metabolite 4-hydroxymethamphetamine (OH-MA), and possibly by additional enzymes, is suggested to be involved in its toxicity. The aim of this work was to study the association between CYP genetics, PMMA metabolism and risk of fatal PMMA toxicity in humans. The frequency distribution of clinically relevant gene variants of CYP2D6, CYP2C9, CYP2C19 and CYP3A5, and the phenotypic blood CYP2D6 metabolic ratio (OH-MA/PMMA) in particular, were compared in fatal PMMA intoxications (n=17) and nonfatal PMMA abuse controls (n=30), using non-abusers (n=305) as references for the expected genotype frequencies in the Norwegian population. Our study demonstrated that the CYP2D6 enzyme and genotype are important in the metabolism of PMMA to OH-MA in humans, but that other enzymes are also involved in this biotransformation. In the fatal PMMA intoxications, the blood concentrations of PMMA were higher and the CYP2D6 metabolic ratios were lower, than in the nonfatal PMMA abuse controls (median (range) 2.1 (0.03-5.0) vs 0.3 (0.1-0.9) mg/L, and ratio 0.6 (0.0-4.6) vs 2.1 (0.2-7.4) p=0.021, respectively). Overall, our findings indicated that, in most cases, PMMA death occurred rapidly and at an early stage of PMMA metabolism, following the ingestion of large and toxic PMMA doses. We could not identify any genetic CYP2D6, CYP2C9, CYP2C19 or CYP3A5 predictive marker on fatal toxicity of PMMA in humans. The overrepresentation of the CYP2D6 poor metabolizer (PM) genotype found in the nonfatal PMMA abuse controls warrants further investigations.
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Affiliation(s)
- Merete Vevelstad
- Division of Forensic Sciences, Norwegian Institute of Public Health (NIPH), P.O. Box 4404, Nydalen, N-0403 Oslo, Norway.
| | - Elisabeth Leere Øiestad
- Division of Forensic Sciences, Norwegian Institute of Public Health (NIPH), P.O. Box 4404, Nydalen, N-0403 Oslo, Norway; School of Pharmacy, University of Oslo, P.O. Box 1068, Blindern, 0316 Oslo, Norway.
| | - Sara Bremer
- Department of Medical Biochemistry, Oslo University Hospital Rikshospitalet, P.O. Box 4950, N-0424 Oslo, Norway.
| | - Inger Lise Bogen
- Division of Forensic Sciences, Norwegian Institute of Public Health (NIPH), P.O. Box 4404, Nydalen, N-0403 Oslo, Norway.
| | - Anna-Lena Zackrisson
- National Board of Forensic Medicine, Department of Forensic Genetics and Forensic Toxicology, Artillerigatan 12, SE-58758 Linkøping, Sweden.
| | - Marianne Arnestad
- Division of Forensic Sciences, Norwegian Institute of Public Health (NIPH), P.O. Box 4404, Nydalen, N-0403 Oslo, Norway; Center for Psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway.
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Implications of Pharmacogenetics for Antimicrobial Prescribing. Mol Microbiol 2016. [DOI: 10.1128/9781555819071.ch43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Flaten HK, Kim HS, Campbell J, Hamilton L, Monte AA. CYP2C19 drug-drug and drug-gene interactions in ED patients. Am J Emerg Med 2015; 34:245-9. [PMID: 26639454 DOI: 10.1016/j.ajem.2015.10.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 10/24/2015] [Accepted: 10/30/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND CYP450 polymorphisms result in variable rates of drug metabolism. CYP drug-drug interactions can contribute to altered drug effectiveness and safety. STUDY OBJECTIVES The primary objective was to determine the percentage of emergency department (ED) patients with cytochrome 2C19 (CYP2C19) drug-drug interactions. The secondary objective was to determine the prevalence of CYP2C19 polymorphisms in a US ED population. METHODS We conducted a prospective observational study in an urban academic ED with 72,000 annual visits. Drug ingestion histories for the 48 hours preceding ED visit were obtained; each drug was coded as CYP2C19 substrate, inhibitor, inducer, or not CYP2C19 dependent. Ten percent of patients were randomized to undergo CYP2C19 genotyping using the Roche Amplichip. RESULTS A total of 502 patients were included; 61% were female, 65% were white, and median age was 39 years (interquartile range, 22-53). One hundred thirty-one (26.1%) patients had taken at least 1 CYP2C19-dependent home drug. Eighteen (13.7%) patients who were already taking a CYP2C19-dependent drug were given or prescribed a CYP2C19-dependent drug while in the ED. Among the 53 patients genotyped, 52 (98%) were extensive metabolizers and 1 was a poor metabolizer. CONCLUSIONS In a population of ED patients, more than a quarter had taken a CYP2C19-dependent drug in the preceding 48 hours, but few were given or prescribed another CYP2C19-dependent drug in the ED. On genotyping analysis, CYP2C19 polymorphisms were uncommon in our cohort. We conclude that changing prescribing practice due to CYP2C19 drug-drug interaction or genotype is unlikely to be useful in most US ED populations.
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Affiliation(s)
- Hanna K Flaten
- University of Colorado Department of Emergency Medicine, 12401 E 17th Ave, Aurora, CO, 80045
| | - Howard S Kim
- Denver Health Residency in Emergency Medicine, 770 Bannock St, Denver, CO, 80204
| | - Jenny Campbell
- University of Colorado Department of Emergency Medicine, 12401 E 17th Ave, Aurora, CO, 80045
| | - Lisa Hamilton
- University of Colorado School of Medicine, 12401 E 17th Ave, Aurora, CO, 80045
| | - Andrew A Monte
- University of Colorado Department of Emergency Medicine, 12401 E 17th Ave, Aurora, CO, 80045; Denver Health Residency in Emergency Medicine, 770 Bannock St, Denver, CO, 80204; University of Colorado School of Medicine, 12401 E 17th Ave, Aurora, CO, 80045; Skaggs School of Pharmacy and Pharmaceutical Sciences, 12401 E 17th Ave, Aurora, CO, 80045; Rocky Mountain Poison & Drug Center, 990 Bannock St, Denver, CO, 80204.
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Stingl JC, Welker S, Hartmann G, Damann V, Gerzer R. Where Failure Is Not an Option -Personalized Medicine in Astronauts. PLoS One 2015; 10:e0140764. [PMID: 26489089 PMCID: PMC4619198 DOI: 10.1371/journal.pone.0140764] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 09/30/2015] [Indexed: 11/17/2022] Open
Abstract
Drug safety and efficacy are highly variable among patients. Most patients will experience the desired drug effect, but some may suffer from adverse drug reactions or gain no benefit. Pharmacogenetic testing serves as a pre-treatment diagnostic option in situations where failure or adverse events should be avoided at all costs. One such situation is human space flight. On the international space station (ISS), a list of drugs is available to cover typical emergency settings, as well as the long-term treatment of common conditions for the use in self-medicating common ailments developing over a definite period. Here, we scrutinized the list of the 78 drugs permanently available at the ISS (year 2014) to determine the extent to which their metabolism may be affected by genetic polymorphisms, potentially requiring genotype-specific dosing or choice of an alternative drug. The purpose of this analysis was to estimate the potential benefit of pharmacogenetic diagnostics in astronauts to prevent therapy failure or side effects.
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Affiliation(s)
- Julia C. Stingl
- Research Division, Federal Institute for Drugs and Medical Devices, Bonn, Germany
- Centre for Translational Medicine, University Bonn Medical Faculty, Bonn, Germany
- * E-mail:
| | - Susanne Welker
- Research Division, Federal Institute for Drugs and Medical Devices, Bonn, Germany
| | - Gunther Hartmann
- Institute for clinical chemistry and clinical pharmacology, University of Bonn, Bonn, Germany
| | - Volker Damann
- Space Medicine Office, European Space Agency, Cologne, Germany
| | - Ruppert Gerzer
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
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Shirotani N, Togawa M, Ikushiro S, Sakaki T, Harada T, Miyagawa H, Matsui M, Nagahori H, Mikata K, Nishioka K, Hirai N, Akamatsu M. Identification and in silico prediction of metabolites of the model compound, tebufenozide by human CYP3A4 and CYP2C19. Bioorg Med Chem 2015; 23:6594-601. [PMID: 26404412 DOI: 10.1016/j.bmc.2015.09.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/09/2015] [Accepted: 09/11/2015] [Indexed: 10/23/2022]
Abstract
The metabolites of tebufenozide, a model compound, formed by the yeast-expressed human CYP3A4 and CYP2C19 were identified to clarify the substrate recognition mechanism of the human cytochrome P450 (CYP) isozymes. We then determined whether tebufenozide metabolites may be predicted in silico. Hydrogen abstraction energies were calculated with the density functional theory method B3LYP/6-31G(∗). A docking simulation was performed using FRED software. Several alkyl sites of tebufenozide were hydroxylated by CYP3A4 whereas only one site was modified by CYP2C19. The accessibility of each site of tebufenozide to the reaction center of CYP enzymes and the susceptibility of each hydrogen atom for metabolism by CYP enzymes were evaluated by a docking simulation and hydrogen abstraction energy estimation, respectively.
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Affiliation(s)
- Naoki Shirotani
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Moe Togawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shinichi Ikushiro
- Faculty of Engineering, Toyama Prefectural University, 5180, Kurokawa, Imizu-shi, Toyama 939-0398, Japan
| | - Toshiyuki Sakaki
- Faculty of Engineering, Toyama Prefectural University, 5180, Kurokawa, Imizu-shi, Toyama 939-0398, Japan
| | - Toshiyuki Harada
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hisashi Miyagawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Masayoshi Matsui
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd, 1-98, Kasugade-naka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Hirohisa Nagahori
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd, 1-98, Kasugade-naka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Kazuki Mikata
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd, 1-98, Kasugade-naka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Kazuhiko Nishioka
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd, 1-98, Kasugade-naka 3-chome, Konohana-ku, Osaka 554-8558, Japan
| | - Nobuhiro Hirai
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Miki Akamatsu
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
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Saab YB, Zeenny R, Ramadan WH. Optimizing clopidogrel dose response: a new clinical algorithm comprising CYP2C19 pharmacogenetics and drug interactions. Ther Clin Risk Manag 2015; 11:1421-7. [PMID: 26445541 PMCID: PMC4590670 DOI: 10.2147/tcrm.s83293] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
PURPOSE Response to clopidogrel varies widely with nonresponse rates ranging from 4% to 30%. A reduced function of the gene variant of the CYP2C19 has been associated with lower drug metabolite levels, and hence diminished platelet inhibition. Drugs that alter CYP2C19 activity may also mimic genetic variants. The aim of the study is to investigate the cumulative effect of CYP2C19 gene polymorphisms and drug interactions that affects clopidogrel dosing, and apply it into a new clinical-pharmacogenetic algorithm that can be used by clinicians in optimizing clopidogrel-based treatment. METHOD Clopidogrel dose optimization was analyzed based on two main parameters that affect clopidogrel metabolite area under the curve: different CYP2C19 genotypes and concomitant drug intake. Clopidogrel adjusted dose was computed based on area under the curve ratios for different CYP2C19 genotypes when a drug interacting with CYP2C19 is added to clopidogrel treatment. A clinical-pharmacogenetic algorithm was developed based on whether clopidogrel shows 1) expected effect as per indication, 2) little or no effect, or 3) clinical features that patients experience and fit with clopidogrel adverse drug reactions. RESULTS The study results show that all patients under clopidogrel treatment, whose genotypes are different from *1*1, and concomitantly taking other drugs metabolized by CYP2C19 require clopidogrel dose adjustment. To get a therapeutic effect and avoid adverse drug reactions, therapeutic dose of 75 mg clopidogrel, for example, should be lowered to 6 mg or increased to 215 mg in patients with different genotypes. CONCLUSION The implementation of clopidogrel new algorithm has the potential to maximize the benefit of clopidogrel pharmacological therapy. Clinicians would be able to personalize treatment to enhance efficacy and limit toxicity.
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Affiliation(s)
- Yolande B Saab
- School of Pharmacy, Pharmaceutical Sciences Department, Lebanese American University, Byblos, Lebanon
| | - Rony Zeenny
- School of Pharmacy, Pharmacy Practice Department, Lebanese American University, Byblos, Lebanon
| | - Wijdan H Ramadan
- School of Pharmacy, Pharmacy Practice Department, Lebanese American University, Byblos, Lebanon
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Aung AK, Haas DW, Hulgan T, Phillips EJ. Pharmacogenomics of antimicrobial agents. Pharmacogenomics 2015; 15:1903-30. [PMID: 25495412 DOI: 10.2217/pgs.14.147] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Antimicrobial efficacy and toxicity varies between individuals owing to multiple factors. Genetic variants that affect drug-metabolizing enzymes may influence antimicrobial pharmacokinetics and pharmacodynamics, thereby determining efficacy and/or toxicity. In addition, many severe immune-mediated reactions have been associated with HLA class I and class II genes. In the last two decades, understanding of pharmacogenomic factors that influence antimicrobial efficacy and toxicity has rapidly evolved, leading to translational success such as the routine use of HLA-B*57:01 screening to prevent abacavir hypersensitivity reactions. This article examines recent advances in the field of antimicrobial pharmacogenomics that potentially affect treatment efficacy and toxicity, and challenges that exist between pharmacogenomic discovery and translation into clinical use.
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Affiliation(s)
- Ar Kar Aung
- Department of General Medicine & Infectious Diseases, The Alfred Hospital, Melbourne, Victoria, Australia
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