1
|
Kyler KE, Gaedigk A, Abdel‐Rahman S, Staggs VS, Pearce RE, Toren P, Leeder JS, Shakhnovich V. Influence of novel CYP2C-haplotype on proton pump inhibitor pharmacokinetics in children. Clin Transl Sci 2024; 17:e13782. [PMID: 38629502 PMCID: PMC11022290 DOI: 10.1111/cts.13782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/04/2024] [Accepted: 03/14/2024] [Indexed: 04/19/2024] Open
Abstract
In this brief report, we provide an analysis of the influence of a novel CYP2C haplotype (CYP2C:TG) on proton pump inhibitor (PPI) pharmacokinetics (PK) in children. The CYP2C:TG haplotype has been proposed to be associated with increased CYP2C19 activity. We sought to determine if this CYP2C:TG haplotype resulted in similar alterations in metabolism for proton pump inhibitors, which are primarily metabolized by CYP2C19. In a cohort of 41 children aged 6-21 participating in a PPI pharmacokinetic study, effects of the CYP2C:TG allele were assessed by fitting two linear regression models for each of the six PK outcomes assessed, the second of which accounted for the presence of the CYP2C:TG allele. The difference in R2 values between the two models was computed to quantify the variability in the outcome that could be accounted for by the CYP2C:TG allele after adjustment for the CYP2C19 genotype. We found the CYP2C:TG haplotype to have no measurable additive impact on CYP2C19-mediated metabolism of PPIs in vivo in older children and adolescents. The findings of this study do not support the clinical utility of routine testing for the CYP2C:TG haplotype to guide PPI dose adjustments in children.
Collapse
Affiliation(s)
- Kathryn E. Kyler
- Division of Hospital MedicineChildren's Mercy Kansas CityKansas CityMissouriUSA
- School of MedicineUniversity of Missouri‐Kansas CityKansas CityMissouriUSA
| | - Andrea Gaedigk
- School of MedicineUniversity of Missouri‐Kansas CityKansas CityMissouriUSA
- Division of Clinical Pharmacology, Toxicology & Therapeutic InnovationChildren's Mercy Research InstituteKansas CityMissouriUSA
| | - Susan Abdel‐Rahman
- School of MedicineUniversity of Missouri‐Kansas CityKansas CityMissouriUSA
| | - Vincent S. Staggs
- IDDI, Inc. (Formerly Biostatistics & Epidemiology Core, Children's Mercy Research Institute, Kansas City, Missouri)RaleighNorth CarolinaUSA
| | - Robin E. Pearce
- School of MedicineUniversity of Missouri‐Kansas CityKansas CityMissouriUSA
- Division of Clinical Pharmacology, Toxicology & Therapeutic InnovationChildren's Mercy Research InstituteKansas CityMissouriUSA
| | - Paul Toren
- Division of Clinical Pharmacology, Toxicology & Therapeutic InnovationChildren's Mercy Research InstituteKansas CityMissouriUSA
| | - J. Steven Leeder
- School of MedicineUniversity of Missouri‐Kansas CityKansas CityMissouriUSA
- Division of Clinical Pharmacology, Toxicology & Therapeutic InnovationChildren's Mercy Research InstituteKansas CityMissouriUSA
| | - Valentina Shakhnovich
- School of MedicineUniversity of Missouri‐Kansas CityKansas CityMissouriUSA
- Division of Clinical Pharmacology, Toxicology & Therapeutic InnovationChildren's Mercy Research InstituteKansas CityMissouriUSA
| |
Collapse
|
2
|
Averill SH, Forno E. Management of the pediatric patient with asthma and obesity. Ann Allergy Asthma Immunol 2024; 132:30-39. [PMID: 37827386 PMCID: PMC10760917 DOI: 10.1016/j.anai.2023.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/29/2023] [Accepted: 10/02/2023] [Indexed: 10/14/2023]
Abstract
Asthma and obesity are 2 of the most significant chronic diseases of childhood. Both are major public health problems that have been increasing in prevalence. Obesity increases the risk of developing asthma in children, and in children with asthma, obesity increases asthma severity and morbidity. The nature of this relationship is complex and not fully understood, but some pediatric patients with "obesity-related asthma" may represent a phenotype that differs from the more classical, atopic pediatric asthma. In this review, we investigate and discuss some of the currently available literature regarding treatment for asthma complicated by obesity in the pediatric population. We cover the importance of healthy lifestyle modifications, management of obesity-related comorbidities, and the potential role of nutritional supplementation or modification. We then review recent literature, mostly in adults, investigating the potential role of obesity or diabetes medications in the management of patients with asthma who have obesity. Finally, we discuss some of the necessary next steps before these potential new treatments can be considered as part of the standard clinical management of asthma.
Collapse
Affiliation(s)
- Samantha H Averill
- Division of Pulmonary, Allergy, and Sleep Medicine, Riley Hospital for Children, Indianapolis, Indiana; Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana
| | - Erick Forno
- Division of Pulmonary, Allergy, and Sleep Medicine, Riley Hospital for Children, Indianapolis, Indiana; Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana.
| |
Collapse
|
3
|
Abstract
Obesity is a pathophysiological state defined by a body mass index > 30 kg/m2 and characterized by an adipose tissue accumulation leading to an important weight increased. Several pathologies named comorbidities such as cardiovascular disease, type 2 diabetes and cancer make obesity the fifth cause of death in the world. Physiological changes impact the four main phases of pharmacokinetics of some drugs and leads to an inappropriate drug-dose. For absorption, the gastrointestinal transit is accelerated, and the gastric empty time is shortened, that can reduce the solubilization and absorption of some oral drugs. The drug distribution is probably the most impacted by the obesity-related changes because the fat mass (FM) increases at the expense of the lean body weight (LBW), leading to an important increase of the volume of distribution for lipophilic drugs and a low or moderately increase of this parameter for hydrophilic drugs. This modification of the distribution may require drug-dose adjustments. By various mechanisms, the metabolism and elimination of drugs are impacted by obesity and should be considered as similar or lower than that non-obese patients. To better understand the necessary drug-dose adjustments in obese patients, a narrative review of the literature was conducted to highlight the main elements to consider in the therapeutic management of adult obese patients.
Collapse
Affiliation(s)
- Julien Gouju
- MINT, INSERM U1066, CNRS 6021, UNIV Angers, SFR-ICAT 4208, IBS-CHU Angers, 4 rue Larrey, Angers 49933 Cedex 9, France; CHU Angers, 4 rue Larrey, Angers 49933 Cedex 9, France.
| | - Samuel Legeay
- MINT, INSERM U1066, CNRS 6021, UNIV Angers, SFR-ICAT 4208, IBS-CHU Angers, 4 rue Larrey, Angers 49933 Cedex 9, France
| |
Collapse
|
4
|
Jafri F, Taylor ZL, Gonzalez D, Shakhnovich V. Effects of obesity on the pharmacology of proton pump inhibitors: current understanding and future implications for patient care and research. Expert Opin Drug Metab Toxicol 2023; 19:1-11. [PMID: 36800927 PMCID: PMC10065909 DOI: 10.1080/17425255.2023.2178897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 02/07/2023] [Indexed: 02/20/2023]
Abstract
INTRODUCTION In the United States, obesity affects approximately ⅖ adults and ⅕ children, leading to increased risk for comorbidities, like gastroesophageal reflux disease (GERD), treated increasingly with proton pump inhibitors (PPIs). Currently, there are no clinical guidelines to inform PPI dose selection for obesity, with sparse data regarding whether dose augmentation is necessary. AREAS COVERED We provide a review of available literature regarding the pharmacokinetics (PK), pharmacodynamics (PD), and/or metabolism of PPIs in children and adults with obesity, as a step toward informing PPI dose selection. EXPERT OPINION Published PK data in adults and children are limited to first-generation PPIs and point toward reduced apparent oral drug clearance in obesity, with equipoise regarding obesity impact on drug absorption. Available PD data are sparse, conflicting, and limited to adults. No studies are available to inform the PPI PK→PD relationship in obesity and if/how it differs compared to individuals without obesity. In the absence of data, best practice may be to dose PPIs based on CYP2C19 genotype and lean body weight, so as to avoid systemic overexposure and potential toxicities, while monitoring closely for efficacy.
Collapse
Affiliation(s)
- Farwa Jafri
- College of Osteopathic Medicine, Kansas City University, Kansas City, MO
| | - Zachary L. Taylor
- Division of Clinical Pharmacology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH
| | - Daniel Gonzalez
- Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Valentina Shakhnovich
- University of Missouri-Kansas City School of Medicine, Kansas City, MO
- Children’s Mercy Kansas City, Kansas City, MO
- Center for Children’s Healthy Lifestyles and Nutrition, Kansas City, MO
| |
Collapse
|
5
|
Thangaraju P, Velmurugan H, N K. Current Status of Pharmacokinetic Research in Children: A Systematic Review of Clinical Trial Records. Curr Rev Clin Exp Pharmacol 2022; 19:CRCEP-EPUB-128427. [PMID: 36573054 DOI: 10.2174/2772432818666221223155455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 09/05/2022] [Accepted: 10/18/2022] [Indexed: 12/28/2022]
Abstract
BACKGROUND Many medications have different pharmacokinetics in children than in adults. Knowledge about the safety and efficacy of medications in children requires research into the pharmacokinetic profiles of children's medicines. By analysing registered clinical trial records, this study determined how frequently pharmacokinetic data is gathered in paediatric drug trials. METHODS We searched for the pharmacokinetic data from clinical trial records for preterm infants and children up to the age of 16 from January 2011 to April 2022. The records of trials involving one or more drugs in preterm infants and children up to the age of 16 were examined for evidence that pharmacokinetic data would be collected. RESULTS In a total of 1483 records of interventional clinical trials, 136 (9.17%) pharmacokinetic data involved adults. Of those 136 records, 60 (44.1%) records were pharmacokinetics trials involving one or more medicines in children up to the age of 16. 20 (33.3 %) in America, followed by 19 (31.6 %) in Europe. Most trials researched medicines in the field of infection or parasitic diseases 20 (33.3%). 27 (48.2%) and 26 (46.4%) trials investigated medicines that were indicated as essential medicine. CONCLUSION The pharmacokinetic characteristics of children's drugs need to be better understood. The current state of pharmacokinetic research appears to address the knowledge gap in this area adequately. Despite slow progress, paediatric clinical trials have experienced a renaissance as the significance of paediatric trials has gained international attention. The outcome of paediatric trials will have an impact on children's health in the future. In recent years, the need for greater availability and access to safe child-size pharmaceuticals has received a lot of attention.
Collapse
Affiliation(s)
- Pugazhenthan Thangaraju
- Department of Pharmacology, All India institute of medical sciences, Raipur, Chhattisgarh, India
| | - Hemasri Velmurugan
- Department of Pharmacology, All India institute of medical sciences, Raipur, Chhattisgarh, India
| | - Krishnapriya N
- Department of Pharmacology, All India institute of medical sciences, Raipur, Chhattisgarh, India
| |
Collapse
|
6
|
Feldman K, Kearns GL, Pearce RE, Abdel-Rahman SM, Leeder JS, Friesen A, Staggs VS, Gaedigk A, Weigel J, Shakhnovich V. Utility of the 13 C-pantoprazole breath test as a CYP2C19 phenotyping probe for children. Clin Transl Sci 2022; 15:1155-1166. [PMID: 35099109 PMCID: PMC9099127 DOI: 10.1111/cts.13232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 11/29/2022] Open
Abstract
The 13 C-pantoprazole breath test (PAN-BT) is a safe, non-invasive, in-vivo CYP2C19 phenotyping probe for adults. Our objective was to evaluate PAN-BT performance in children, with a focus on discriminating individuals who, according to guidelines from the Clinical Pharmacology Implementation Consortium (CPIC), would benefit from starting dose escalation vs. reduction for proton pump inhibitors (PPIs). Children (n=65; 6-17 years) genotyped for CYP2C19 variants *2, *3, *4, and *17 received a single oral dose of 13 C-pantoprazole. Plasma concentrations of pantoprazole and its metabolites, and changes in exhaled 13 CO2 (termed delta-over-baseline or DOB), were measured 10 times over 8 hours using HPLC-UV and spectrophotometry, respectively. Pharmacokinetic parameters of interest were generated and DOB features derived using feature engineering for the first 180 minutes post-administration. DOB features, age, sex, and obesity status were used to run bootstrap analysis at each timepoint (Ti) independently. For each iteration, stratified samples were drawn based on genotype prevalence in the original cohort. A random forest was trained, and predictive performance of PAN-BT evaluated. Strong discriminating ability for CYP2C19 intermediate vs. normal/rapid metabolizer phenotype was noted at DOBT30min (mean sensitivity: 0.522, specificity: 0.784), with consistent model outperformance over a random or a stratified classifier approach at each time-point (p<0.001). With additional refinement and investigation, the test could become a useful and convenient dosing tool in clinic to help identify children who would benefit most from PPI dose escalation vs. dose reduction, in accordance with CPIC guidelines.
Collapse
Affiliation(s)
- Keith Feldman
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.,Children's Mercy Kansas City, Kansas City, MO, USA
| | - Gregory L Kearns
- Texas Christian University and UNTHSC School of Medicine, Fort Worth, TX, USA
| | - Robin E Pearce
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.,Children's Mercy Kansas City, Kansas City, MO, USA
| | - Susan M Abdel-Rahman
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.,Children's Mercy Kansas City, Kansas City, MO, USA
| | - J Steven Leeder
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.,Children's Mercy Kansas City, Kansas City, MO, USA
| | - Alec Friesen
- Oklahoma School of Community Medicine, Tulsa, OK, USA
| | - Vincent S Staggs
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.,Children's Mercy Kansas City, Kansas City, MO, USA
| | - Andrea Gaedigk
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.,Children's Mercy Kansas City, Kansas City, MO, USA
| | - Jaylene Weigel
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - Valentina Shakhnovich
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.,Children's Mercy Kansas City, Kansas City, MO, USA.,Center for Children's Healthy Lifestyles & Nutrition, Kansas City, MO, USA
| |
Collapse
|
7
|
Kollins F, Supriatmo S, Saragih R, Ilhamd I. Effectivity of Esomeprazole Compared with Lansoprazole in the Treatment of Pediatric with Gastritis. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.7191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: The administration of proton pump inhibitor (PPI) therapy in pediatric patients has also increased dramatically during the last three decades. Clinical trials comparison of esomeprazole and lansoprazole for pediatric were limited.
AIM: This study focused on comparing the effectivity of Esomeprazole with lansoprazole for healing gastritis symptoms in pediatric patients.
METHODS: A randomized and single blind (assessors) controlled clinical trial was done at H. Adam Malik hospital at Medan. Patients that complied with study’s criteria and signed informed consent were collected information about the symptoms. Confirmation diagnosis of g astritis by gastroscopy, then randomized into lansoprazole treatment group (15 mg if < 30 kg and 30 mg if > 30 kg) or esomeprazole treatment group (0,4–0,8 mg per Kg body weight). Medication for both groups will be given orally for 14 day s, then evaluated for the initial symptoms. p -value of this study was calculated with the χ2 test.
RESULTS: Fifty two patients confirmed gastritis were enrolled in this study; 27 patients received lansoprazole and 25 patients received esomeprazole. There was no difference of effectivity between the two groups for vomiting, hematemesis, and nausea. Lansoprazole treatment for 14 days has a significant difference for abdominal pain recovery from esomeprazole treatment. The lansoprazole groups have 92% free of abdominal pain compared to the esomeprazole group for only 66% free of abdominal pain.
CONCLUSION: There was no significant difference between lansoprazole and esomeprazole therapy.
Collapse
|
8
|
Kyler KE, Bettenhausen JL, Hall M, Glynn EF, Hoffman MA, Shakhnovich V, Smolderen K, Davis AM. Obesity and Corticosteroid Dosing Guideline Adherence in Children Hospitalized With Asthma. Hosp Pediatr 2021; 11:380-388. [PMID: 33664119 DOI: 10.1542/hpeds.2020-001420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVES Drug dosing recommendations for children with obesity remain limited. This may lead to variability in medication dosing among children with obesity. Therefore, our objective was to determine differences in the prevalence of guideline-nonadherent systemic corticosteroid orders by weight category in children hospitalized for asthma. METHODS We performed a retrospective cross-sectional study of children aged 2 to 17 years hospitalized with asthma and prescribed systemic corticosteroids between January 1, 2010, and December 31, 2017, using the Cerner Health Facts deidentified database. Weight categories ranging from underweight to class III obesity were defined on the basis of BMI percentiles by using CDC guidelines. Corticosteroid orders were categorized as guideline adherent or nonadherent on the basis of total body weight-based dosing guidelines from the National Heart, Lung, and Blood Institute. χ2 test and multivariable logistic regression models were used to determine differences in guideline adherence between weight categories. RESULTS We identified 21 488 children prescribed systemic corticosteroids during asthma hospitalizations. Most (54.2%) had a healthy weight, and 23.8% had obesity. Almost one-quarter received guideline-nonadherent orders (22.2%), with increasing prevalence among higher weight categories (19.4% of healthy weight children versus 36.0% of those with class III obesity; P < .001). After controlling for demographic and clinical covariates, weight category remained significantly associated with receiving a guideline-nonadherent order (P < .001). CONCLUSIONS The prevalence of guideline-nonadherent corticosteroid orders for children hospitalized with asthma increases linearly with weight category, disproportionately affecting children with severe obesity. Standardization of drug dosing guidelines for children with obesity may help reduce variability in drug doses prescribed that may increase risk of harm.
Collapse
Affiliation(s)
- Kathryn E Kyler
- Children's Mercy Hospital, Kansas City, Missouri; .,School of Medicine, University of Missouri-Kansas City, Kansas City, Missouri
| | - Jessica L Bettenhausen
- Children's Mercy Hospital, Kansas City, Missouri.,School of Medicine, University of Missouri-Kansas City, Kansas City, Missouri
| | - Matt Hall
- Children's Mercy Hospital, Kansas City, Missouri.,Children's Hospital Association, Lenexa, Kansas
| | - Earl F Glynn
- Children's Mercy Hospital, Kansas City, Missouri
| | - Mark A Hoffman
- Children's Mercy Hospital, Kansas City, Missouri.,School of Medicine, University of Missouri-Kansas City, Kansas City, Missouri
| | - Valentina Shakhnovich
- Children's Mercy Hospital, Kansas City, Missouri.,School of Medicine, University of Missouri-Kansas City, Kansas City, Missouri.,Center for Children's Healthy Lifestyles and Nutrition, Kansas City, Missouri; and
| | - Kim Smolderen
- School of Medicine, University of Missouri-Kansas City, Kansas City, Missouri
| | - Ann M Davis
- Center for Children's Healthy Lifestyles and Nutrition, Kansas City, Missouri; and.,University of Kansas Medical Center, Kansas City, Kansas
| |
Collapse
|
9
|
Erstad BL, Barletta JF. Drug dosing in the critically ill obese patient: a focus on medications for hemodynamic support and prophylaxis. Crit Care 2021; 25:77. [PMID: 33622380 PMCID: PMC7901103 DOI: 10.1186/s13054-021-03495-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 02/08/2021] [Indexed: 12/29/2022] Open
Abstract
Medications used for supportive care or prophylaxis constitute a significant portion of drug utilization in the intensive care unit. Evidence-based guidelines are available for many aspects of supportive care but drug doses listed are typically for patients with normal body habitus and not morbid obesity. Failure to account for the pharmacokinetic changes that occur with obesity can lead to an incorrect dose and treatment failure or toxicity. This paper is intended to help clinicians design initial dosing regimens in critically ill obese patients for medications commonly used for hemodynamic support or prophylaxis. A detailed literature search of medications used for supportive care or prophylaxis listed in practice guidelines was conducted with an emphasis on obesity, pharmacokinetics and dosing. Relevant manuscripts were reviewed and strategies for dosing are provided. For medications used for hemodynamic support, a similar strategy can be used as in non-obese patients. Similarly, medications for stress ulcer prophylaxis do not need to be adjusted. Anticoagulants for venous thromboembolism prophylaxis, on the other hand, require an individualized approach where higher doses are necessary.
Collapse
Affiliation(s)
- Brian L Erstad
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Arizona, 1295 N Martin Ave, PO Box 210202, Tucson, AZ, 85721, USA
| | - Jeffrey F Barletta
- Department of Pharmacy Practice, College of Pharmacy, Midwestern University, 19555 N 59th Ave, Glendale, AZ, 85308, USA.
| |
Collapse
|
10
|
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: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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
| |
Collapse
|
11
|
Writers AM. Dosage adjustment in obese children, even for common drugs, is largely unclear and a treat-to-effect approach may work best. Drugs Ther Perspect 2020; 36:341-346. [DOI: 10.1007/s40267-020-00734-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
12
|
Ameer B, Weintraub MA. Dosing Common Medications in Hospitalized Pediatric Patients with Obesity: A Review. Obesity (Silver Spring) 2020; 28:1013-1022. [PMID: 32441477 DOI: 10.1002/oby.22739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 12/17/2019] [Indexed: 12/31/2022]
Abstract
Medication management in children and adolescents with obesity is challenging because both developmental and pathophysiological changes may impact drug disposition and response. Evidence to date indicates an effect of obesity on drug disposition for certain drugs used in this population. This work identified published studies evaluating drug dosing, pharmacokinetics (PK), and effect in pediatric patients with obesity, focusing on 70 common medications used in a pediatric network of 42 US medical centers. A PubMed search revealed 33 studies providing PK and/or effectiveness data for 23% (16 of 70) of medications, 44% of which have just one study and can be considered exploratory. This work appraising 4 decades of literature shows several promising approaches: greater use of PK models applied to prospective clinical studies, dosing recommendations derived from both PK and safety, and multiyear effectiveness data on drugs for chronic conditions (e.g., asthma). Most studies make dose recommendations but are weakened by retrospective study design, small study populations, and no controls or historic controls. Dosing decisions continue to rely on extrapolating knowledge, including targeting systemic drug exposure typically achieved in adults. Optimal weight-based dosing strategies vary by drug and warrant prospective, controlled studies incorporating PK and modeling and simulation to complement clinical assessment.
Collapse
Affiliation(s)
- Barbara Ameer
- Department of Medicine, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey, USA
| | - Michael A Weintraub
- Department of Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| |
Collapse
|
13
|
Kyler KE, Wagner J, Hosey-Cojocari C, Watt K, Shakhnovich V. Drug Dose Selection in Pediatric Obesity: Available Information for the Most Commonly Prescribed Drugs to Children. Paediatr Drugs 2019; 21:357-69. [PMID: 31432433 DOI: 10.1007/s40272-019-00352-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Obesity rates continue to rise in children, and little guidance exists regarding the need for adjustment away from total body weight-based doses for those prescribing drugs to this population of children. A majority of drugs prescribed to children with obesity result in either sub-therapeutic or supra-therapeutic concentrations, placing these children at risk for treatment failure and drug toxicities. In this review, we highlight available obesity-specific pharmacokinetic and dosing information for the most frequently prescribed drugs to children in the inpatient and outpatient clinical settings. We also comment on available dosing recommendations for drugs prescribed to treat common pediatric obesity-related comorbidities. This review highlights that there is no safe or proven 'rule of thumb,' for dosing drugs for children with obesity, and a striking lack of pharmacokinetic data to support the creation of dosing guidelines for children with obesity for the most commonly prescribed drugs. It is important that those prescribing for children with obesity are aware of these gaps in knowledge and of potential drug treatment failure or adverse events related to drug toxicity as a result of these knowledge gaps. Until more data are available, we recommend close monitoring of drug response and adverse events in children with obesity receiving commonly prescribed drugs.
Collapse
|
14
|
McLaughlin MJ, Wagner J, Shakhnovich V, Carleton B, Leeder JS. Considerations for Implementing Precision Therapeutics for Children. Clin Transl Sci 2019; 12:140-150. [PMID: 30516322 PMCID: PMC6440566 DOI: 10.1111/cts.12607] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 11/13/2018] [Indexed: 12/12/2022] Open
Abstract
Improving the utilization of pharmacologic agents in the pediatric population yields significant, perhaps life‐long, benefits. Genetic factors related to the disposition of a medication or an alteration at the target receptor site contributes to the observed variability of exposure and response between individuals. An additional source of this variability specific to the pediatric population is ontogeny, where age‐specific changes during development may require dose adjustments to obtain the same levels of drug exposure and response. With significant improvements in characterizing both the ontogeny and genetic contributions of drug metabolizing enzymes, the time is right to begin placing more emphasis on response rather than only the dose‐exposure relationship. The amount of drug target receptors and the relative affinity for binding at that target site may require different levels of systemic exposure to achieve a desired response. Concentration‐controlled studies can identify the needed exposure for a response at the drug target, the level of expression of the target site in an individual patient, and the tools required to individualize response. Although pediatrics represents a large spectrum of growth and development, developing tools to improve drug delivery for each individual patient across the spectrum of the ages treated by clinicians remains valuable.
Collapse
Affiliation(s)
| | | | | | - Bruce Carleton
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | | |
Collapse
|