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Yang R, Ding Q, Ding J, Zhu L, Pei Q. Physiologically based pharmacokinetic modeling in obesity: applications and challenges. Expert Opin Drug Metab Toxicol 2024:1-12. [PMID: 39101366 DOI: 10.1080/17425255.2024.2388690] [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: 03/26/2024] [Revised: 07/11/2024] [Accepted: 08/01/2024] [Indexed: 08/06/2024]
Abstract
INTRODUCTION Rising global obesity rates pose a threat to people's health. Obesity causes a series of pathophysiologic changes, making the response of patients with obesity to drugs different from that of nonobese, thus affecting the treatment efficacy and even leading to adverse events. Therefore, understanding obesity's effects on pharmacokinetics is essential for the rational use of drugs in patients with obesity. AREAS COVERED Articles related to physiologically based pharmacokinetic (PBPK) modeling in patients with obesity from inception to October 2023 were searched in PubMed, Embase, Web of Science and the Cochrane Library. This review outlines PBPK modeling applications in exploring factors influencing obesity's effects on pharmacokinetics, guiding clinical drug development and evaluating and optimizing clinical use of drugs in patients with obesity. EXPERT OPINION Obesity-induced pathophysiologic alterations impact drug pharmacokinetics and drug-drug interactions (DDIs), altering drug exposure. However, there is a lack of universal body size indices or quantitative pharmacology models to predict the optimal for the patients with obesity. Therefore, dosage regimens for patients with obesity must consider individual physiological and biochemical information, and clinically individualize therapeutic drug monitoring for highly variable drugs to ensure effective drug dosing and avoid adverse effects.
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Affiliation(s)
- Ruwei Yang
- Department of Pharmacy, The Third XiangyHospital, Central South University, Changsha, Hunan, China
| | - Qin Ding
- Department of Pharmacy, The Third XiangyHospital, Central South University, Changsha, Hunan, China
| | - Junjie Ding
- Center for Tropical Medicine and Global Health, Oxford Medical School, Oxford, UK
| | - Liyong Zhu
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qi Pei
- Department of Pharmacy, The Third XiangyHospital, Central South University, Changsha, Hunan, China
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Lajeunesse-Trempe F, Okroj D, Ostarijas E, Ramalho A, Tremblay EJ, Llewellyn D, Harlow C, Chandhyoke N, Chew NWS, Vincent RP, Tchernof A, Piché ME, Poirier P, Biertho L, Morin MP, Copeland CS, Dimitriadis GK. Medication and supplement pharmacokinetic changes following bariatric surgery: A systematic review and meta-analysis. Obes Rev 2024; 25:e13759. [PMID: 38710656 DOI: 10.1111/obr.13759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 02/26/2024] [Accepted: 03/19/2024] [Indexed: 05/08/2024]
Abstract
OBJECTIVES To evaluate the impact of bariatric surgery on the pharmacokinetic (PK) parameters of orally administered medications and supplements. METHODS Systematic searches of bibliographic databases were conducted to identify studies. Pooled effect estimates from different surgical procedures were calculated using a random-effects model. RESULTS Quantitative data were synthesized from 58 studies including a total of 1985 participants. Whilst 40 medications and 6 supplements were evaluated across these studies, heterogeneity and missing information reduced the scope of the meta-analysis to the following medications and supplements: atorvastatin, paracetamol, omeprazole, midazolam, vitamin D, calcium, zinc, and iron supplements. There were no significant differences in PK parameters post-surgery for the drugs atorvastatin and omeprazole, and supplements calcium, ferritin, and zinc supplements. Paracetamol showed reduced clearance (mean difference [MD] = -15.56 L/hr, p = 0.0002, I2 = 67%), increased maximal concentration (MD = 6.90 μg/ml, p = 0.006, I2 = 92%) and increased terminal elimination half-life (MD = 0.49 hr, p < 0.0001, I2 = 3%) post-surgery. The remaining 36 medications and 2 supplements were included in a systematic review. Overall, 18 of the 53 drugs and supplements showed post-operative changes in PK parameters. CONCLUSION This study demonstrates heterogeneity in practice and could not reach conclusive findings for most PK parameters. Prospective studies are needed to inform best practice and enhance patient healthcare and safety following bariatric surgery.
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Affiliation(s)
- Fannie Lajeunesse-Trempe
- Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
- Quebec Heart and Lung Institute, Laval University, Canada
| | - Dominika Okroj
- Department of Endocrinology and Internal Medicine, Faculty of Medicine, Medical University of Gdańsk, Gdańsk, Poland
| | - Eduard Ostarijas
- Faculty of Medicine, J. J. Strossmayer University of Osijek, Osijek, Croatia
| | - Alan Ramalho
- Quebec Heart and Lung Institute, Laval University, Canada
| | | | - David Llewellyn
- Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
| | - Chris Harlow
- Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
| | - Nikhil Chandhyoke
- Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
| | - Nicholas W S Chew
- Department of Cardiology, National University Heart Centre, National University Health System, Singapore
| | - Royce P Vincent
- Department of Clinical Biochemistry, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
| | - Andre Tchernof
- Quebec Heart and Lung Institute, Laval University, Canada
| | | | - Paul Poirier
- Quebec Heart and Lung Institute, Laval University, Canada
| | | | | | - Caroline S Copeland
- Centre for Pharmaceutical Medicine Research, Institute of Pharmaceutical Science, King's College London, London, UK
| | - Georgios K Dimitriadis
- Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
- Obesity, Type 2 Diabetes and Immunometabolism Research Group, Faculty of Cardiovascular and Metabolic Medicine & Sciences, School of Life Course Sciences, King's College London, London, UK
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Curry L, Alrubia S, Bois FY, Clayton R, El-Khateeb E, Johnson TN, Faisal M, Neuhoff S, Wragg K, Rostami-Hodjegan A. A guide to developing population files for physiologically-based pharmacokinetic modeling in the Simcyp Simulator. CPT Pharmacometrics Syst Pharmacol 2024. [PMID: 39030888 DOI: 10.1002/psp4.13202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 06/20/2024] [Accepted: 07/02/2024] [Indexed: 07/22/2024] Open
Abstract
The Simcyp Simulator is a software platform widely used in the pharmaceutical industry to conduct stochastic physiologically-based pharmacokinetic (PBPK) modeling. This approach has the advantage of combining routinely generated in vitro data on drugs and drug products with knowledge of biology and physiology parameters to predict a priori potential pharmacokinetic changes in absorption, distribution, metabolism, and excretion for populations of interest. Combining such information with pharmacodynamic knowledge of drugs enables planning for potential dosage adjustment when clinical studies are feasible. Although the conduct of dedicated clinical studies in some patient groups (e.g., with hepatic or renal diseases) is part of the regulatory path for drug development, clinical studies for all permutations of covariates potentially affecting pharmacokinetics are impossible to perform. The role of PBPK in filling the latter gap is becoming more appreciated. This tutorial describes the different input parameters required for the creation of a virtual population giving robust predictions of likely changes in pharmacokinetics. It also highlights the considerations needed to qualify the models for such contexts of use. Two case studies showing the step-by-step development and application of population files for obese or morbidly obese patients and individuals with Crohn's disease are provided as the backbone of our tutorial to give some hands-on and real-world examples.
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Affiliation(s)
- Liam Curry
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
| | - Sarah Alrubia
- Centre for Applied Pharmacokinetic Research (CAPKR), The University of Manchester, Manchester, UK
- Pharmaceutical Chemistry Department, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Frederic Y Bois
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
| | - Ruth Clayton
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
| | - Eman El-Khateeb
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
- Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Trevor N Johnson
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
| | - Muhammad Faisal
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
| | - Sibylle Neuhoff
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
| | - Kris Wragg
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
| | - Amin Rostami-Hodjegan
- Certara Predictive Technologies (CPT), Simcyp Division, Sheffield, UK
- Centre for Applied Pharmacokinetic Research (CAPKR), The University of Manchester, Manchester, UK
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Maass D, Cumming D, Raza H, Liao T, Chung J, Pao M. Changes in Serum Concentration of Antidepressants After Bariatric Surgery and Recommendations for Postbariatric Surgery Antidepressant Therapy. J Acad Consult Liaison Psychiatry 2024; 65:261-270. [PMID: 38220143 DOI: 10.1016/j.jaclp.2024.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 12/19/2023] [Accepted: 01/06/2024] [Indexed: 01/16/2024]
Abstract
BACKGROUND Bariatric surgery affects the absorption of medications including antidepressants, but data regarding these effects are limited. OBJECTIVES Our objectives were to review publicly available data regarding changes in antidepressant serum concentration following bariatric surgery in order to develop medication dosing recommendations in this patient population. METHODS A comprehensive literature review was performed utilizing key search terms in Pubmed. Additional data were retrieved from the Food and Drug Administration and DrugBank Online resources. RESULTS A total of twelve published articles were included in addition to the publicly available data from the Food and Drug Administration and DrugBank. The serum concentration of antidepressants following bariatric surgery demonstrated considerable variability between and within drug classes due to unique pharmacokinetic features, drug preparation, and formulation. Recommendations were developed from published data regarding changes in serum concentration and drug-specific pharmacokinetic data. CONCLUSIONS To our knowledge, this is the first study to propose medication dose-adjustment recommendations for patients on antidepressants undergoing bariatric surgery. We were limited by the relatively small amount of data available and recommend monitoring patients and use of clinical judgment along with this guidance.
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Affiliation(s)
- Daniel Maass
- University of Miami, Miller School of Medicine, Miami, FL.
| | - Drew Cumming
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Haniya Raza
- National Institute of Mental Health, National Institutes of Health, Bethesda, MD
| | - Ted Liao
- Medstar Georgetown University Hospital, Washington, DC
| | - Joyce Chung
- National Institute of Mental Health, National Institutes of Health, Bethesda, MD
| | - Maryland Pao
- National Institute of Mental Health, National Institutes of Health, Bethesda, MD
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Pham A, Chan P, Mercado A, Wang J, Wang Z, Ibrahim H, Gogineni H, Huang Y. Impact of bariatric surgery on cytochrome P 450 enzyme activity. Front Pharmacol 2024; 15:1372950. [PMID: 38590638 PMCID: PMC10999584 DOI: 10.3389/fphar.2024.1372950] [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: 01/18/2024] [Accepted: 03/05/2024] [Indexed: 04/10/2024] Open
Abstract
Bariatric surgeries are becoming more prevalent as obesity rates continue to rise. Being that it is an effective weight-loss procedure, it can induce significant anatomical, physiological, and metabolic alterations, which affect the pharmacokinetics of various medications. Cytochrome (CYP) P450 is a group of enzymes that are primarily responsible for metabolizing most medications. Bariatric surgery may affect CYP activity and consequently alter metabolism of various medications, and the resulting weight loss may influence the metabolism of various drugs. This study investigates the impact of bariatric surgery on which CYP enzymes are affected and their effects medications. Authors of this study did an extensive literature review and research in databases including PubMed and EMBASE. The evidence was gathered for medication efficacy influenced by enzyme fluctuations to advocate for further studies for patients that undergo bariatric surgery. The search was limited to English-language results and is deemed up to date as of September 2023. There are numerous studies that indicated alterations of the CYP enzyme activity, which affects the pharmacokinetics of medications used to treat acute and chronic conditions after bariatric surgery. There are various mechanisms involved in CYP enzyme activity leading to fluctuations and the clearance of medications and subsequently compromising the efficacy and safety of these agents. It is imperative to conduct more prospective randomized control studies with longer duration to guide clinicians on how to manage medications with various CYP activity for patients' post-bariatric surgery.
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Affiliation(s)
- Anna Pham
- Western University of Health Sciences, School of Pharmacy, Pomona, CA, United States
| | - Patrick Chan
- Western University of Health Sciences, School of Pharmacy, Pomona, CA, United States
| | - Angela Mercado
- Western University of Health Sciences, School of Pharmacy, Pomona, CA, United States
| | - Jeffrey Wang
- Western University of Health Sciences, School of Pharmacy, Pomona, CA, United States
| | - Zhijun Wang
- University of California, Irvine, School of Pharmacy and Pharmaceutical Sciences, Irvine, CA, United States
| | - Hajer Ibrahim
- Kaiser Permanente San Jose Medical Center, San Jose, CA, United States
| | - Hyma Gogineni
- Western University of Health Sciences, School of Pharmacy, Pomona, CA, United States
| | - Ying Huang
- Western University of Health Sciences, School of Pharmacy, Pomona, CA, United States
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Abudahab S, Slattum PW, Price ET, McClay JL. Epigenetic regulation of drug metabolism in aging: utilizing epigenetics to optimize geriatric pharmacotherapy. Pharmacogenomics 2024; 25:41-54. [PMID: 38126340 PMCID: PMC10794944 DOI: 10.2217/pgs-2023-0199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023] Open
Abstract
We explore the relationship between epigenetic aging and drug metabolism. We review current evidence for changes in drug metabolism in normal aging, followed by a description of how epigenetic modifications associated with age can regulate the expression and functionality of genes. In particular, we focus on the role of epigenome-wide studies of human and mouse liver in understanding these age-related processes with respect to xenobiotic processing. We highlight genes encoding drug metabolizing enzymes and transporters revealed to be affected by epigenetic aging in these studies. We conclude that substantial evidence exists for epigenetic aging impacting drug metabolism and transport genes, but more work is needed. We further highlight the promise of pharmacoepigenetics applied to enhancing drug safety in older adults.
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Affiliation(s)
- Sara Abudahab
- Department of Pharmacotherapy & Outcomes Science, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Patricia W Slattum
- Department of Pharmacotherapy & Outcomes Science, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
- Virginia Center on Aging, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Elvin T Price
- Department of Pharmacotherapy & Outcomes Science, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Joseph L McClay
- Department of Pharmacotherapy & Outcomes Science, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
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7
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Kvitne KE, Hovd M, Johnson LK, Wegler C, Karlsson C, Artursson P, Andersson S, Sandbu R, Hjelmesæth J, Skovlund E, Jansson-Löfmark R, Christensen H, Åsberg A, Robertsen I. Digoxin Pharmacokinetics in Patients with Obesity Before and After a Gastric Bypass or a Strict Diet Compared with Normal Weight Individuals. Clin Pharmacokinet 2024; 63:109-120. [PMID: 37993699 PMCID: PMC10786955 DOI: 10.1007/s40262-023-01320-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2023] [Indexed: 11/24/2023]
Abstract
BACKGROUND AND OBJECTIVE Several drugs on the market are substrates for P-glycoprotein (P-gp), an efflux transporter highly expressed in barrier tissues such as the intestine. Body weight, weight loss, and a Roux-en-Y gastric bypass (RYGB) may influence P-gp expression and activity, leading to variability in the drug response. The objective of this study was therefore to investigate digoxin pharmacokinetics as a measure of the P-gp phenotype in patients with obesity before and after weight loss induced by an RYGB or a strict diet and in normal weight individuals. METHODS This study included patients with severe obesity preparing for an RYGB (n = 40) or diet-induced weight loss (n = 40) and mainly normal weight individuals scheduled for a cholecystectomy (n = 18). Both weight loss groups underwent a 3-week low-energy diet (<1200 kcal/day) followed by an additional 6 weeks of <800 kcal/day induced by an RYGB (performed at week 3) or a very-low-energy diet. Follow-up time was 2 years, with four digoxin pharmacokinetic investigations at weeks 0, 3, and 9, and year 2. Hepatic and jejunal P-gp levels were determined in biopsies obtained from the patients undergoing surgery. RESULTS The RYGB group and the diet group had a comparable weight loss in the first 9 weeks (13 ± 2.3% and 11 ± 3.6%, respectively). During this period, we observed a minor increase (16%) in the digoxin area under the concentration-time curve from zero to infinity in both groups: RYGB: 2.7 µg h/L [95% confidence interval (CI) 0.67, 4.7], diet: 2.5 µg h/L [95% CI 0.49, 4.4]. In the RYGB group, we also observed that the time to reach maximum concentration decreased after surgery: from 1.0 ± 0.33 hours at week 3 to 0.77 ± 0.08 hours at week 9 (-0.26 hours [95% CI -0.47, -0.05]), corresponding to a 25% reduction. Area under the concentration-time curve from zero to infinity did not change long term (week 0 to year 2) in either the RYGB (1.1 µg h/L [-0.94, 3.2]) or the diet group (0.94 µg h/L [-1.2, 3.0]), despite a considerable difference in weight loss from baseline (RYGB: 30 ± 7%, diet: 3 ± 6%). At baseline, the area under the concentration-time curve from zero to infinity was -5.5 µg h/L [95% CI -8.5, -2.5] (-26%) lower in patients with obesity (RYGB plus diet) than in normal weight individuals scheduled for a cholecystectomy. Further, patients undergoing an RYGB had a 0.05 fmol/µg [95% CI 0.00, 0.10] (29%) higher hepatic P-gp level than the normal weight individuals. CONCLUSIONS Changes in digoxin pharmacokinetics following weight loss induced by a pre-operative low-energy diet and an RYGB or a strict diet (a low-energy diet plus a very-low-energy diet) were minor and unlikely to be clinically relevant. The lower systemic exposure of digoxin in patients with obesity suggests that these patients may have increased biliary excretion of digoxin possibly owing to a higher expression of P-gp in the liver.
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Affiliation(s)
- Kine Eide Kvitne
- Department of Pharmacy, University of Oslo, Blindern, P.O. Box 1068, 0316, Oslo, Norway.
| | - Markus Hovd
- Department of Pharmacy, University of Oslo, Blindern, P.O. Box 1068, 0316, Oslo, Norway
| | - Line Kristin Johnson
- Department of Endocrinology, Obesity and Nutrition, Vestfold Hospital Trust, Tønsberg, Norway
| | - Christine Wegler
- Department of Pharmacy, Uppsala University, Uppsala, Sweden
- DMPK, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Cecilia Karlsson
- Late-Stage Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Per Artursson
- Department of Pharmacy, Uppsala University, Uppsala, Sweden
| | - Shalini Andersson
- Oligonucleotide Discovery, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Rune Sandbu
- Department of Endocrinology, Obesity and Nutrition, Vestfold Hospital Trust, Tønsberg, Norway
| | - Jøran Hjelmesæth
- Department of Endocrinology, Obesity and Nutrition, Vestfold Hospital Trust, Tønsberg, Norway
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Eva Skovlund
- Department of Public Health and Nursing, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Rasmus Jansson-Löfmark
- DMPK, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Hege Christensen
- Department of Pharmacy, University of Oslo, Blindern, P.O. Box 1068, 0316, Oslo, Norway
| | - Anders Åsberg
- Department of Pharmacy, University of Oslo, Blindern, P.O. Box 1068, 0316, Oslo, Norway
- Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
| | - Ida Robertsen
- Department of Pharmacy, University of Oslo, Blindern, P.O. Box 1068, 0316, Oslo, Norway
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Fu M, Luo L, Feng S, Lin H, Lu Z, Gu F, Fan Y, Wu B, Huang J, Shen K. Effect of SHR0302 on the pharmacokinetics of CYP3A4, CYP2C8, CYP2C9 and CYP2C19 probe substrates in healthy volunteers: A cocktail analysis. Br J Clin Pharmacol 2023; 89:3659-3668. [PMID: 37464978 DOI: 10.1111/bcp.15856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/02/2023] [Accepted: 07/06/2023] [Indexed: 07/20/2023] Open
Abstract
AIMS This study evaluated the effects of SHR0302 on the pharmacokinetics of cytochrome P450 (CYP) probe substrates. METHODS We performed a single-centre, open-label, three-period drug-drug interaction (DDI) study in 24 healthy subjects (NCT05392127). Subjects received a single oral dose of 5 mg warfarin (CYP2C9), 20 mg omeprazole (CYP2C19) and 15 mg midazolam (CYP3A4) on Days 1, 8 and 22, and received 0.5 mg repaglinide (CYP2C8) on Days 7, 14 and 28. Multiple oral doses of 8 mg SHR0302 were administered once daily from Day 8 to Day 28. RESULTS The exposure of S-warfarin and repaglinide were comparable before and after SHR0302 administration. AUC of midazolam was not affected by SHR0302, whereas the administration of SHR0302 slightly decreased the Cmax of midazolam by 7.6% (single dose) and 15.7% (once daily for 14 days). The AUC0-t , AUC0-inf , and Cmax of omeprazole were slightly decreased after a single dose of SHR0302 by 19.2%, 21.8% and 23.5%, respectively. In the presence of SHR0302 for 14 days, the AUC0-t , AUC0-inf , and Cmax of omeprazole were marginally reduced by 3.0%, 16.4% and 8.3%, respectively. According to the induction mechanism of the CYP enzyme, for the investigation of the induction effect, the results of multiple administrations of the perpetrator were more reliable than those of the single dose. CONCLUSIONS The results demonstrated that co-administration of SHR0302 8 mg once daily is unlikely to have a clinically meaningful effect on the exposure of drugs metabolized by CYP3A4, CYP2C8, CYP2C9 and CYP2C19 in healthy subjects.
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Affiliation(s)
- Meng Fu
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
| | - Lin Luo
- Clinical Trail Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Sheng Feng
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
| | - Hongda Lin
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
| | - Zekun Lu
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
| | - Fei Gu
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
| | - Yang Fan
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
| | - Bing Wu
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
| | - Jianying Huang
- Clinical Trail Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Kai Shen
- Jiangsu Hengrui Pharmaceuticals Co., Ltd., Shanghai, China
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Kvitne KE, Krogstad V, Wegler C, Johnson LK, K Kringen M, Hovd MH, Hertel JK, Heijer M, Sandbu R, Skovlund E, Artursson P, Karlsson C, Andersson S, Andersson TB, Hjelmesaeth J, Åsberg A, Jansson-Löfmark R, Christensen H, Robertsen I. Short- and long-term effects of body weight, calorie restriction, and gastric bypass on CYP1A2-, CYP2C19-, and CYP2C9 activity. Br J Clin Pharmacol 2022; 88:4121-4133. [PMID: 35404513 PMCID: PMC9541356 DOI: 10.1111/bcp.15349] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/23/2022] [Accepted: 03/29/2022] [Indexed: 11/30/2022] Open
Abstract
Aim Roux‐en‐Y gastric bypass (RYGB) may influence drug disposition due to surgery‐induced gastrointestinal alterations and/or subsequent weight loss. The objective was to compare short‐ and long‐term effects of RYGB and diet on the metabolic ratios of paraxanthine/caffeine (cytochrome P450 [CYP] 1A2 activity), 5‐hydroxyomeprazole/omeprazole (CYP2C19 activity) and losartan/losartan carboxylic acid (CYP2C9 activity), and cross‐sectionally compare these CYP‐activities with normal‐to‐overweight controls. Methods This trial included patients with severe obesity preparing for RYGB (n = 40) or diet‐induced (n = 41) weight loss, and controls (n = 18). Both weight loss groups underwent a 3‐week low‐energy diet (<1200 kcal/day, weeks 0‐3) followed by a 6‐week very‐low‐energy diet or RYGB (both <800 kcal/day, weeks 3‐9). Follow‐up time was 2 years, with four pharmacokinetic investigations. Results Mean ± SD weight loss from baseline was similar in the RYGB‐group (13 ± 2.4%) and the diet group (10.5 ± 3.9%) at week 9, but differed at year 2 (RYGB −30 ± 6.9%, diet −3.1 ± 6.3%). From weeks 0 to 3, mean (95% confidence interval [CI]) CYP2C19 activity similarly increased in both groups (RYGB 43% [16, 55], diet 48% [22, 60]). Mean CYP2C19 activity increased by 30% (2.6, 43) after RYGB (weeks 3‐9), but not in the diet‐group (between‐group difference −0.30 [−0.63, 0.03]). CYP2C19 activity remained elevated in the RYGB group at year 2. Baseline CYP2C19 activity was 2.7‐fold higher in controls compared with patients with obesity, whereas no difference was observed in CYP1A2 and CYP2C9 activities. Conclusion Our findings suggest that CYP2C19 activity is lower in patients with obesity and increases following weight loss. This may be clinically relevant for drug dosing. No clinically significant effect on CYP1A2 and CYP2C9 activities was observed.
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Affiliation(s)
- Kine Eide Kvitne
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Oslo, Norway
| | - Veronica Krogstad
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Oslo, Norway
| | - Christine Wegler
- Department of Pharmacy, Uppsala University, Uppsala, Sweden.,DMPK, Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | | | - Marianne K Kringen
- Center for Psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway.,Department of Health Sciences, OsloMet - Oslo Metropolitan University, Oslo, Norway
| | - Markus Herberg Hovd
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Oslo, Norway
| | - Jens K Hertel
- The Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway
| | - Maria Heijer
- Clinical Pharmacology and Quantitative Pharmacology, Clinical Pharmacology & Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Rune Sandbu
- The Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway.,Department of Surgery, Vestfold Hospital Trust, Tønsberg, Norway
| | - Eva Skovlund
- Department of Public Health and Nursing, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Per Artursson
- Department of Pharmacy and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Cecilia Karlsson
- Late-stage Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden.,Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Shalini Andersson
- Research and Early Development, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Tommy B Andersson
- DMPK, Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Jøran Hjelmesaeth
- The Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway.,Department of Endocrinology, Morbid Obesity and Preventive Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Anders Åsberg
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Oslo, Norway.,Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
| | - Rasmus Jansson-Löfmark
- DMPK, Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Hege Christensen
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Oslo, Norway
| | - Ida Robertsen
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Oslo, Norway
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10
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Clinical Effects of Exercise Rehabilitation Combined with Repaglinide in the Treatment of Diabetes. DISEASE MARKERS 2022; 2022:6309188. [PMID: 35371345 PMCID: PMC8975691 DOI: 10.1155/2022/6309188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/14/2022] [Accepted: 02/18/2022] [Indexed: 11/17/2022]
Abstract
Objective Diabetes, a common endocrine and metabolic disease in clinical practice, generally manifests a certain defect in insulin secretion due to several factors, thereafter leading to a metabolic disorder such as hyperglycemia. This study was conducted to explore the clinical effects of repaglinide combined with exercise rehabilitation on improving the blood glucose of patients with diabetes. Methods In this retrospective study, 100 patients with diabetes treated in our hospital from January 2018 to January 2020 were assessed for eligibility and recruited. They were assigned at a ratio of 1 : 1 to receive either repaglinide (control group) or repaglinide plus exercise rehabilitation (experimental group). Outcome measures include fasting blood glucose, 2 h postprandial blood glucose, glycosylated hemoglobin, time to normal blood glucose, blood glucose fluctuation, insulin dosage, adverse reactions, and blood glucose adequate rate. Results All eligible patients showed similar pretreatment fasting blood glucose, glycosylated hemoglobin, and 2 h postprandial blood glucose (P > 0.05). After treatment, repaglinide plus exercise rehabilitation resulted in lower levels of fasting blood glucose, glycosylated hemoglobin, and 2 h postprandial blood glucose versus repaglinide alone (P < 0.05). Repaglinide plus exercise rehabilitation was associated with a significantly shorter time to normal blood glucose and a milder fluctuation versus repaglinide (P < 0.05). The incidence of adverse reactions and blood glucose adequate rate was 6% and 94% in the experimental group and 50% and 52% in the control group, respectively (P < 0.05). Conclusion Repaglinide plus exercise rehabilitation results in effective blood glucose control and reduced incidence of adverse reactions and yields a promising efficacy, so it is worthy of clinical promotion and application.
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11
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Xenobiotic-Induced Aggravation of Metabolic-Associated Fatty Liver Disease. Int J Mol Sci 2022; 23:ijms23031062. [PMID: 35162986 PMCID: PMC8834714 DOI: 10.3390/ijms23031062] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/11/2022] [Accepted: 01/15/2022] [Indexed: 01/09/2023] Open
Abstract
Metabolic-associated fatty liver disease (MAFLD), which is often linked to obesity, encompasses a large spectrum of hepatic lesions, including simple fatty liver, steatohepatitis, cirrhosis and hepatocellular carcinoma. Besides nutritional and genetic factors, different xenobiotics such as pharmaceuticals and environmental toxicants are suspected to aggravate MAFLD in obese individuals. More specifically, pre-existing fatty liver or steatohepatitis may worsen, or fatty liver may progress faster to steatohepatitis in treated patients, or exposed individuals. The mechanisms whereby xenobiotics can aggravate MAFLD are still poorly understood and are currently under deep investigations. Nevertheless, previous studies pointed to the role of different metabolic pathways and cellular events such as activation of de novo lipogenesis and mitochondrial dysfunction, mostly associated with reactive oxygen species overproduction. This review presents the available data gathered with some prototypic compounds with a focus on corticosteroids and rosiglitazone for pharmaceuticals as well as bisphenol A and perfluorooctanoic acid for endocrine disruptors. Although not typically considered as a xenobiotic, ethanol is also discussed because its abuse has dire consequences on obese liver.
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12
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Portolés-Pérez A, Paterna ABR, Sánchez Pernaute A, Torres García AJ, Moreno Lopera C, Chicharro LM, Bandrés F, López-Picado A, Rubio MA, Castrillón EV. Effect of Obesity and Roux-En-Y Gastric Surgery on Omeprazole Pharmacokinetics. Obes Facts 2022; 15:271-280. [PMID: 34979510 PMCID: PMC9021662 DOI: 10.1159/000521570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 12/12/2021] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION The prevalence of obesity is increasing globally. The principal aim was to evaluate whether gastric bypass surgery modifies the bioavailability and pharmacokinetic (PK) parameters of omeprazole. METHODS Controlled, open-label, bioavailability clinical trial in patients undergoing Roux-en-Y gastric bypass (RYGB). Healthy patients with obesity (body mass index >35) were included and assessed for omeprazole PKs before and after RYGB (1 and 6 months). PK sampling was done at baseline and several times up to 12 h after drug dosing. Pre- and post-surgery parameters were compared using paired ANOVA or Wilcoxon tests, and control versus cases using ANOVA or Mann-Whitney tests. Given the post-surgery change in body weight, parameters were corrected by dose/body weight. RESULTS Fourteen case and 24 control subjects were recruited; 92% were women (N = 35/38). In patients who underwent RYGB, maximum plasma concentration (Cmax) was significantly reduced at 1 and 6 months after surgery compared with presurgery values (p = 0.001). Regarding the AUC, the values are lower at 1 and 6 months after surgery than at baseline (p < 0.001). The drug clearance was also increased in the first month after surgery. No differences were found between patients 6 months after surgery and controls. Cmax and AUC corrected by dose/body weight were significantly different between the baseline surgery subjects and controls. Discusion/Conclusions: Omeprazole bioavailability is reduced in patients with obesity at 1 and 6 months after RYGB. However, omeprazole PK parameters 6 months after RYGB are similar to control subjects, and thus no dose correction is required after RYGB for a given indication.
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Affiliation(s)
- Antonio Portolés-Pérez
- Servicio de Farmacología Clínica, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
- Departamento de Farmacología, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Ana Belén Rivas Paterna
- Unidad de Investigación Clínica y Ensayos Clínicos, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain,
- Departamento de Enfermería, Facultad Enfermería, Fisioterapia y Podología, Universidad Complutense de Madrid, Madrid, Spain,
| | - Andrés Sánchez Pernaute
- Servicio de Cirugía General y Digestiva, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - Antonio José Torres García
- Servicio de Cirugía General y Digestiva, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | | | - Luis M Chicharro
- Cátedra Complutense de Diagnóstico e Innovación, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Fernando Bandrés
- Cátedra Complutense de Diagnóstico e Innovación, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Amanda López-Picado
- Unidad de Investigación Clínica y Ensayos Clínicos, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - Miguel A Rubio
- Servicio de Endocrinología y Nutrición, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - Emilio Vargas Castrillón
- Servicio de Farmacología Clínica, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
- Departamento de Farmacología, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
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13
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McNeill RP, Zhang M, Epton MJ, Doogue MP. Drug metabolism in severe chronic obstructive pulmonary disease: A phenotyping cocktail study. Br J Clin Pharmacol 2021; 87:4397-4407. [PMID: 33855722 DOI: 10.1111/bcp.14862] [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: 12/06/2020] [Accepted: 03/27/2021] [Indexed: 11/27/2022] Open
Abstract
AIMS To evaluate the effect of severe chronic obstructive pulmonary disease (COPD) on drug metabolism by comparing the pharmacokinetics of patients with severe COPD with healthy volunteers and using the modified Inje drug cocktail. METHODS This was a single-centre pharmacokinetic study with 12 healthy participants and 7 participants with GOLD D COPD. Midazolam 1 mg, dextromethorphan 30 mg, losartan 25 mg, omeprazole 20 mg, caffeine 130 mg and paracetamol 1000 mg were simultaneously administered and intensive pharmacokinetic sampling was conducted over 8 hours. Drug metabolism by CYP3A4, CYP2D6, CYP2C9, CYP2C19, CYP1A2, UGT1A6 and UGT1A9 in participants with COPD were compared with phenotypes in healthy controls. RESULTS The oral clearance (95% confidence interval) in participants with COPD relative to controls was: midazolam 63% (60-67%); dextromethorphan 72% (40-103%); losartan 53% (52-55%); omeprazole 35% (31-39%); caffeine 52% (50-53%); and paracetamol 73% (72-74%). There was a 5-fold increase in AUC for omeprazole and approximately 2-fold increases for caffeine, losartan, dextromethorphan, and midazolam. The AUC of paracetamol, which is mostly glucuronidated, was increased by about 60%. CONCLUSION Severe COPD is associated with a clinically significant reduction in oral drug clearance. This may be greater for cytochrome P450 substrates than for glucuronidated drugs. This supports reduced starting doses when prescribing for patients with severe COPD.
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Affiliation(s)
- Richard P McNeill
- Department of Clinical Pharmacology, Christchurch Hospital, New Zealand
| | - Mei Zhang
- Department of Medicine, Christchurch campus, University of Otago, New Zealand.,Department of Toxicology, Canterbury Health Laboratories, New Zealand
| | - Michael J Epton
- Department of Medicine, Christchurch campus, University of Otago, New Zealand.,Department of Respiratory Medicine, Christchurch Hospital, New Zealand
| | - Matthew P Doogue
- Department of Clinical Pharmacology, Christchurch Hospital, New Zealand.,Department of Medicine, Christchurch campus, University of Otago, New Zealand
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14
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Zarezadeh M, Saedisomeolia A, Shekarabi M, Khorshidi M, Emami MR, Müller DJ. The effect of obesity, macronutrients, fasting and nutritional status on drug-metabolizing cytochrome P450s: a systematic review of current evidence on human studies. Eur J Nutr 2020; 60:2905-2921. [PMID: 33141242 DOI: 10.1007/s00394-020-02421-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 10/19/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Cytochrome P450s (CYPs) are a class of hemoproteins involved in drug metabolism. It has been reported that body composition, proportion of dietary macronutrients, fasting and nutritional status can interfere with the activity of drug-metabolizing CYPs. OBJECTIVES The present systematic review was conducted to summarize the effect of obesity, weight reduction, macronutrients, fasting and malnutrition on the CYP-mediated drug metabolism. METHODS PubMed (Medline), Scopus, Embase and Cochrane Library databases and Google Scholar were searched up to June 2020 to obtain relevant studies. The PRISMA guidelines were employed during all steps. Two reviewers independently extracted the information from the included studies. Studies investigating CYPs activity directly or indirectly through pharmacokinetics of probe drugs, were included. Increase in clearance (CL) or decrease in elimination half-life (t½) and area under the curve (AUC) of probe drugs were considered as increase in CYPs activity. RESULTS A total of 6545 articles were obtained through searching databases among which 69 studies with 126 datasets fully met the inclusion criteria. The results indicated that obesity might decrease the activity of CYP3A4/5, CYP1A2 and CYP2C9 and increase the activity of CYP2E1. The effect of obesity on CYP2D6 is controversial. Also, weight loss increased CYP3A4 activity. Moreover, CYP1A2 activity was decreased by high carbohydrate diet, increased by high protein diet and fasting and unchanged by malnutrition. The activity of CYP2C19 was less susceptible to alterations compared to other CYPs. CONCLUSION The activity of drug-metabolizing CYPs are altered by body composition, dietary intake and nutritional status. This relationship might contribute to drug toxicity or reduce treatment efficacy and influence cost-effectiveness of medical care.
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Affiliation(s)
- Meysam Zarezadeh
- Department of Clinical Nutrition, Student Research Committee, Nutrition Research Center, Faculty of Nutrition and Food Science, Tabriz University of Medical Science, Tabriz, Iran
| | - Ahmad Saedisomeolia
- Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran. .,School of Medicine, Western Sydney University, Sydney, NSW, 2560, Australia.
| | - Mahoor Shekarabi
- Faculty of Medical Sciences and Technologies, Science and Research Branch, Azad University, Tehran, Iran
| | - Masoud Khorshidi
- Student's Research Committee, Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Emami
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Daniel J Müller
- Department of Psychiatry, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.,Pharmacogenetic Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
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15
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May M, Schindler C, Engeli S. Modern pharmacological treatment of obese patients. Ther Adv Endocrinol Metab 2020; 11:2042018819897527. [PMID: 32030121 PMCID: PMC6977225 DOI: 10.1177/2042018819897527] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 12/09/2019] [Indexed: 12/21/2022] Open
Abstract
There are many angles to consider in drug treatment of obese patients. On the one hand, some specific weight loss drugs are available, on the other, several drugs are associated with unintentional weight changes. When treating an obese patient for any given disease, several physiological changes may influence the pharmacokinetic properties of the drugs required. Thus, increased body weight may influence the efficacy and safety of some drug treatments. Even more complicated is the situation after weight reduction surgery. Due to the various changes to the gastrointestinal tract induced by the different surgical techniques used, and the dynamic changes in body composition thereafter, drug dosing has to be constantly reconsidered. Whereas all of these issues are of clinical importance, none of them have been investigated in the necessary depth and broadness to ensure safe and efficacious drug treatment of the massively obese patient. Individual considerations have to be based on comorbidities, concomitant medication, and on specific drug properties, for example, lipophilicity, volume of distribution, and metabolism. In this article we summarize the data available on different aspects of drug treatment in the obese patient with the hope of improving patient care.
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Affiliation(s)
| | - Christoph Schindler
- MHH Clinical Research Center Core Facility (OE 8660) and Center for Pharmacology and Toxicology, Hannover, Germany
| | - Stefan Engeli
- Hannover Medical School, Institute of Clinical Pharmacology, Hannover, Germany
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