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Mekala JR, Nalluri HP, Reddy PN, S B S, N S SK, G V S D SK, Dhiman R, Chamarthy S, Komaragiri RR, Manyam RR, Dirisala VR. Emerging trends and therapeutic applications of monoclonal antibodies. Gene 2024; 925:148607. [PMID: 38797505 DOI: 10.1016/j.gene.2024.148607] [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: 08/15/2023] [Revised: 04/02/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024]
Abstract
Monoclonal antibodies (mAbs) are being used to prevent, detect, and treat a broad spectrum of malignancies and infectious and autoimmune diseases. Over the past few years, the market for mAbs has grown exponentially. They have become a significant part of many pharmaceutical product lines, and more than 250 therapeutic mAbs are undergoing clinical trials. Ever since the advent of hybridoma technology, antibody-based therapeutics were realized using murine antibodies which further progressed into humanized and fully human antibodies, reducing the risk of immunogenicity. Some of the benefits of using mAbs over conventional drugs include a drastic reduction in the chances of adverse reactions, interactions between drugs, and targeting specific proteins. While antibodies are very efficient, their higher production costs impede the process of commercialization. However, their cost factor has been improved by developing biosimilar antibodies, which are affordable versions of therapeutic antibodies. Along with biosimilars, innovations in antibody engineering have helped to design bio-better antibodies with improved efficacy than the conventional ones. These novel mAb-based therapeutics are set to revolutionize existing drug therapies targeting a wide spectrum of diseases, thereby meeting several unmet medical needs. In the future, mAbs generated by applying next-generation sequencing (NGS) are expected to become a powerful tool in clinical therapeutics. This article describes the methods of mAb production, pre-clinical and clinical development of mAbs, approved indications targeted by mAbs, and novel developments in the field of mAb research.
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Affiliation(s)
- Janaki Ramaiah Mekala
- Department of Biotechnology, Koneru Lakshmaiah Education Foundation (KLEF), Vaddeswaram 522502, Guntur, Andhra Pradesh, INDIA.
| | - Hari P Nalluri
- Department of Biotechnology, Vignan's (Deemed to be) University, Guntur 522213, AP, India
| | - Prakash Narayana Reddy
- Department of Microbiology, Dr. V.S. Krishna Government College, Visakhapatnam 530013, India
| | - Sainath S B
- Department of Biotechnology, Vikrama Simhapuri University, Nellore 524320, AP, India
| | - Sampath Kumar N S
- Department of Biotechnology, Vignan's (Deemed to be) University, Guntur 522213, AP, India
| | - Sai Kiran G V S D
- Santhiram Medical College and General Hospital, Nandyal, Kurnool 518501, AP, India
| | - Rohan Dhiman
- Laboratory of Mycobacterial Immunology, Department of Life Sciences, National Institute of Technology Rourkela-769008, India
| | - Sahiti Chamarthy
- Department of Biotechnology, Koneru Lakshmaiah Education Foundation (KLEF), Vaddeswaram 522502, Guntur, Andhra Pradesh, INDIA
| | - Raghava Rao Komaragiri
- Department of CSE, Koneru Lakshmaiah Education Foundation (KLEF), Vaddeswaram 522302, Andhra Pradesh, INDIA
| | - Rajasekhar Reddy Manyam
- Amrita School of Computing, Amrita Vishwa Vidyapeetham, Amaravati Campus, Amaravati, Andhra Pradesh, India
| | - Vijaya R Dirisala
- Department of Biotechnology, Vignan's (Deemed to be) University, Guntur 522213, AP, India.
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Lin KJ, Turner KC, Rosario M, Harnisch LO, Davis JD, DiCioccio AT. Population Pharmacokinetics of Casirivimab and Imdevimab in Pediatric and Adult Non-Infected Individuals, Pediatric and Adult Ambulatory or Hospitalized Patients or Household Contacts of Patients Infected with SARS-COV-2. Pharm Res 2024:10.1007/s11095-024-03764-5. [PMID: 39294447 DOI: 10.1007/s11095-024-03764-5] [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: 04/16/2024] [Accepted: 08/15/2024] [Indexed: 09/20/2024]
Abstract
INTRODUCTION Casirivimab (CAS) and imdevimab (IMD) are two fully human monoclonal antibodies that bind different epitopes on the receptor binding domain of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and block host receptor interactions. CAS + IMD and was developed for the treatment and prevention of SARS-CoV-2 infections. METHODS A population pharmacokinetic (PopPK) analysis was conducted using pooled data from 7598 individuals from seven clinical studies to simultaneously fit concentration-time data of CAS and IMD and investigate selected covariates as sources of variability in PK parameters. The dataset comprised CAS + IMD-treated pediatric and adult non-infected individuals, ambulatory or hospitalized patients infected with SARS-CoV-2, or household contacts of patients infected with SARS-CoV-2. RESULTS CAS and IMD concentration-time data were both appropriately described simultaneously by a two-compartment model with first-order absorption following subcutaneous dose administration and first-order elimination. Clearance estimates of CAS and IMD were 0.193 and 0.236 L/day, respectively. Central volume of distribution estimates were 3.92 and 3.82 L, respectively. Among the covariates identified as significant, body weight and serum albumin had the largest impact (20-34%, and ~ 7-31% change in exposures at extremes, respectively), while all other covariates resulted in small differences in exposures. Application of the PopPK model included simulations to support dose recommendations in pediatrics based on comparable exposures of CAS and IMD between different weight groups in pediatrics and adults following weight-based dosing regimens. CONCLUSIONS This analysis provided important insights to characterize CAS and IMD PK simultaneously in a diverse patient population and informed pediatric dose selection.
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Affiliation(s)
- Kuan-Ju Lin
- Regeneron Pharmaceuticals, Inc, 777 Old Saw Mill River Road, Tarrytown, NY, 10591, USA.
| | - Kenneth C Turner
- Regeneron Pharmaceuticals, Inc, 777 Old Saw Mill River Road, Tarrytown, NY, 10591, USA
| | - Maria Rosario
- Regeneron Pharmaceuticals, Inc, 777 Old Saw Mill River Road, Tarrytown, NY, 10591, USA
| | - Lutz O Harnisch
- Regeneron Pharmaceuticals, Inc, 777 Old Saw Mill River Road, Tarrytown, NY, 10591, USA
| | - John D Davis
- Regeneron Pharmaceuticals, Inc, 777 Old Saw Mill River Road, Tarrytown, NY, 10591, USA
| | - A Thomas DiCioccio
- Regeneron Pharmaceuticals, Inc, 777 Old Saw Mill River Road, Tarrytown, NY, 10591, USA
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Nassar-Sheikh Rashid A, Hooijberg F, Bergkamp SC, Gruppen MP, Kuijpers TW, Nurmohamed M, Rispens T, Wolbink G, van den Berg JM, Schonenberg-Meinema D, Mathôt RAA. Population Pharmacokinetics of Adalimumab in Juvenile Idiopathic Arthritis Patients: A Retrospective Cohort Study Using Clinical Care Data. Paediatr Drugs 2024; 26:441-450. [PMID: 38630199 PMCID: PMC11192828 DOI: 10.1007/s40272-024-00629-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/18/2024] [Indexed: 06/22/2024]
Abstract
BACKGROUND AND OBJECTIVE Juvenile idiopathic arthritis (JIA) is a chronic autoimmune disorder that primarily affects the joints in children. Notably, it is known to co-occur with uveitis. Adalimumab, a monoclonal anti-TNF antibody, is effective in treating both conditions. A deeper understanding of the pharmacokinetics (PK) of adalimumab in JIA is crucial to advance in more personalized treatment approaches. The objective of this study is to evaluate the population PK profile of adalimumab in JIA and to explain causes for its variability. MATERIALS AND METHODS Adalimumab and antidrug antibody concentrations were retrospectively retrieved from the charts of patients with JIA. Initially, five literature-based population PK models of adalimumab were evaluated to assess their ability to describe the observed concentration-time profiles in the JIA cohort. These models included one specifically for the pediatric Crohn's disease population and four derived from studies in adult populations in healthy subjects and rheumatoid arthritis patients. Subsequently, a novel population PK model tailored to the JIA population was developed using NONMEM software. Monte Carlo simulations were then conducted utilizing the final PK model to visualize the concentration-time profile of adalimumab in patients with JIA and the impact of covariates. RESULTS A cohort of 50 patients with JIA with 78 available adalimumab samples was assessed. The mean age was 11.8 ± 3.9 years, with a median body weight of 49 kg (interquartile range 29.4-59.8 kg). All literature models adequately described the concentration-time profiles in JIA. The best model, which was developed in patients with rheumatoid arthritis during the maintenance phase of treatment, served as a basis for estimating clearance in JIA, resulting in a value of 0.37 L per day per 70 kg. Patient body weight, antidrug antibodies, methotrexate use, CRP level, and comorbidity of uveitis were found to have a significant impact on adalimumab clearance, and these reduced the inter-patient variability from 58.6 to 28.0%. On steady state in the simulated patient population, the mean trough level was 7.4 ± 5.5 mg/L. The two dosing regimens of 20 and 40 mg every other week, based on patients' body weight, resulted in comparable simulated overall drug exposure. CONCLUSIONS Five literature models effectively described adalimumab PK in this pediatric cohort, highlighting the potential for extrapolating existing models to the pediatric population. The new JIA model confirmed the effect of several known covariates and found a novel association for drug clearance with methotrexate use (lower) and uveitis (higher), which might have clinical relevance for personalized dosing in JIA.
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Affiliation(s)
- Amara Nassar-Sheikh Rashid
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
- Department of Pediatrics, Zaans Medical Center, Zaandam, The Netherlands.
| | - Femke Hooijberg
- Department of Rheumatology, Amsterdam Rheumatology and Immunology Center, Location Reade, Dr. Jan van Breemenstraat 2, 1056 AB, Amsterdam, The Netherlands
- Department of Rheumatology, Amsterdam UMC, Location VUmc, De Boelelaan 1118, 1081 HZ, Amsterdam, The Netherlands
| | - Sandy C Bergkamp
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Mariken P Gruppen
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Taco W Kuijpers
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Mike Nurmohamed
- Department of Rheumatology, Amsterdam Rheumatology and Immunology Center, Location Reade, Dr. Jan van Breemenstraat 2, 1056 AB, Amsterdam, The Netherlands
- Department of Rheumatology, Amsterdam UMC, Location VUmc, De Boelelaan 1118, 1081 HZ, Amsterdam, The Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory Academic Medical Center, Plesmanlaan 125, 1066 CX, Amsterdam, The Netherlands
| | - Gertjan Wolbink
- Department of Rheumatology, Amsterdam Rheumatology and Immunology Center, Location Reade, Dr. Jan van Breemenstraat 2, 1056 AB, Amsterdam, The Netherlands
| | - J Merlijn van den Berg
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Dieneke Schonenberg-Meinema
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Ron A A Mathôt
- Hospital Pharmacy, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
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Clegg LE, Stepanov O, Schmidt H, Tang W, Zhang H, Webber C, Cohen TS, Esser MT, Någård M. Accelerating therapeutics development during a pandemic: population pharmacokinetics of the long-acting antibody combination AZD7442 (tixagevimab/cilgavimab) in the prophylaxis and treatment of COVID-19. Antimicrob Agents Chemother 2024; 68:e0158723. [PMID: 38534112 PMCID: PMC11064475 DOI: 10.1128/aac.01587-23] [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: 12/08/2023] [Accepted: 03/05/2024] [Indexed: 03/28/2024] Open
Abstract
AZD7442 is a combination of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-neutralizing antibodies, tixagevimab and cilgavimab, developed for pre-exposure prophylaxis (PrEP) and treatment of coronavirus disease 2019 (COVID-19). Using data from eight clinical trials, we describe a population pharmacokinetic (popPK) model of AZD7442 and show how modeling of "interim" data accelerated decision-making during the COVID-19 pandemic. The final model was a two-compartmental distribution model with first-order absorption and elimination, including standard allometric exponents for the effect of body weight on clearance and volume. Other covariates included were as follows: sex, age >65 years, body mass index ≥30 kg/m2, and diabetes on absorption rate; diabetes on clearance; Black race on central volume; and intramuscular (IM) injection site on bioavailability. Simulations indicated that IM injection site and body weight had > 20% effects on AZD7442 exposure, but no covariates were considered to have a clinically relevant impact requiring dose adjustment. The pharmacokinetics of AZD7442, cilgavimab, and tixagevimab were comparable and followed linear kinetics with extended half-lives (median 78.6 days for AZD7442), affording prolonged protection against susceptible SARS-CoV-2 variants. Comparison of popPK simulations based on "interim data" with a target concentration based on 80% viral inhibition and assuming 1.81% partitioning into the nasal lining fluid supported a decision to double the PrEP dosage from 300 mg to 600 mg to prolong protection against Omicron variants. Serum AZD7442 concentrations in adolescents weighing 40-95 kg were predicted to be only marginally different from those observed in adults, supporting authorization for use in adolescents before clinical data were available. In these cases, popPK modeling enabled accelerated clinical decision-making.
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Affiliation(s)
- Lindsay E. Clegg
- Clinical Pharmacology and Quantitative Pharmacology, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Oleg Stepanov
- Clinical Pharmacology and Quantitative Pharmacology, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, United Kingdom
| | | | - Weifeng Tang
- Clinical Pharmacology and Quantitative Pharmacology, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Huixia Zhang
- Clinical Pharmacology and Quantitative Pharmacology, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Chris Webber
- Clinical Development, Vaccines and Immune Therapies, BioPharmaceuticals R&D, AstraZeneca, Cambridge, United Kingdom
| | - Taylor S. Cohen
- Vaccines & Immune Therapies, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Mark T. Esser
- Vaccines & Immune Therapies, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Mats Någård
- Clinical Pharmacology and Quantitative Pharmacology, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Gaithersburg, Maryland, USA
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Charlab R, Leong R, Shord SS, Reaman GH. Pediatric Cancer Drug Development: Leveraging Insights in Cancer Biology and the Evolving Regulatory Landscape to Address Challenges and Guide Further Progress. Cold Spring Harb Perspect Med 2024; 14:a041656. [PMID: 38467448 PMCID: PMC10982696 DOI: 10.1101/cshperspect.a041656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
The discovery and development of anticancer drugs for pediatric patients have historically languished when compared to both past and recent activity in drug development for adult patients, notably the dramatic spike of targeted and immune-oncology therapies. The reasons for this difference are multifactorial. Recent changes in the regulatory landscape surrounding pediatric cancer drug development and the understanding that some pediatric cancers are driven by genetic perturbations that also drive disparate adult cancers afford new opportunities. The unique cancer-initiating events and dependencies of many pediatric cancers, however, require additional pediatric-specific strategies. Research efforts to unravel the underlying biology of pediatric cancers, innovative clinical trial designs, model-informed drug development, extrapolation from adult data, addressing the unique considerations in pediatric patients, and use of pediatric appropriate formulations, should all be considered for efficient development and dosage optimization of anticancer drugs for pediatric patients.
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Affiliation(s)
- Rosane Charlab
- Office of Clinical Pharmacology, Office of Translational Sciences, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, USA
| | - Ruby Leong
- Office of Clinical Pharmacology, Office of Translational Sciences, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, USA
| | - Stacy S Shord
- Office of Clinical Pharmacology, Office of Translational Sciences, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, USA
| | - Gregory H Reaman
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, Maryland 20892, USA
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Davis JD, Bravo Padros M, Conrado DJ, Ganguly S, Guan X, Hassan HE, Hazra A, Irvin SC, Jayachandran P, Kosloski MP, Lin KJ, Mukherjee K, Paccaly A, Papachristos A, Partridge MA, Prabhu S, Visich J, Welf ES, Xu X, Zhao A, Zhu M. Subcutaneous Administration of Monoclonal Antibodies: Pharmacology, Delivery, Immunogenicity, and Learnings From Applications to Clinical Development. Clin Pharmacol Ther 2024; 115:422-439. [PMID: 38093583 DOI: 10.1002/cpt.3150] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 12/06/2023] [Indexed: 01/11/2024]
Abstract
Subcutaneous (s.c.) administration of monoclonal antibodies (mAbs) can reduce treatment burden for patients and healthcare systems compared with intravenous (i.v.) infusion through shorter administration times, made possible by convenient, patient-centric devices. A deeper understanding of clinical pharmacology principles related to efficacy and safety of s.c.-administered mAbs over the past decade has streamlined s.c. product development. This review presents learnings from key constituents of the s.c. mAb development pathway, including pharmacology, administration variables, immunogenicity, and delivery devices. Restricted mAb transportation through the hypodermis explains their incomplete absorption at a relatively slow rate (pharmacokinetic (PK)) and may impact mAb-cellular interactions and/or onset and magnitude of physiological responses (pharmacodynamic). Injection volumes, formulation, rate and site of injection, and needle attributes may affect PKs and the occurrence/severity of adverse events like injection-site reactions or pain, with important consequences for treatment adherence. A review of immunogenicity data for numerous compounds reveals that incidence of anti-drug antibodies (ADAs) is generally comparable across i.v. and s.c. routes, and complementary factors including response magnitude (ADA titer), persistence over time, and neutralizing antibody presence are needed to assess clinical impact. Finally, four case studies showcase how s.c. biologics have been clinically developed: (i) by implementation of i.v./s.c. bridging strategies to streamline PD-1/PD-L1 inhibitor development, (ii) through co-development with i.v. presentations for anti-severe acute respiratory syndrome-coronavirus 2 antibodies to support rapid deployment of both formulations, (iii) as the lead route for bispecific T cell engagers (BTCEs) to mitigate BTCE-mediated cytokine release syndrome, and (iv) for pediatric patients in the case of dupilumab.
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Affiliation(s)
- John D Davis
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | | | | | - Samit Ganguly
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | - Xiaowen Guan
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | - Hazem E Hassan
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | - Anasuya Hazra
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | - Susan C Irvin
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | | | | | - Kuan-Ju Lin
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | | | - Anne Paccaly
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | | | | | - Saileta Prabhu
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | | | - Erik S Welf
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | - Xiaoying Xu
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | - An Zhao
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
| | - Min Zhu
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, USA
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Dinh J, Johnson TN, Grimstein M, Lewis T. Physiologically Based Pharmacokinetics Modeling in the Neonatal Population-Current Advances, Challenges, and Opportunities. Pharmaceutics 2023; 15:2579. [PMID: 38004559 PMCID: PMC10675397 DOI: 10.3390/pharmaceutics15112579] [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: 09/26/2023] [Revised: 10/24/2023] [Accepted: 10/29/2023] [Indexed: 11/26/2023] Open
Abstract
Physiologically based pharmacokinetic (PBPK) modeling is an approach to predicting drug pharmacokinetics, using knowledge of the human physiology involved and drug physiochemical properties. This approach is useful when predicting drug pharmacokinetics in under-studied populations, such as pediatrics. PBPK modeling is a particularly important tool for dose optimization for the neonatal population, given that clinical trials rarely include this patient population. However, important knowledge gaps exist for neonates, resulting in uncertainty with the model predictions. This review aims to outline the sources of variability that should be considered with developing a neonatal PBPK model, the data that are currently available for the neonatal ontogeny, and lastly to highlight the data gaps where further research would be needed.
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Affiliation(s)
- Jean Dinh
- Certara UK Limited, Sheffield S1 2BJ, UK; (J.D.); (T.N.J.)
| | | | - Manuela Grimstein
- Office of Clinical Pharmacology, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20903, USA
| | - Tamorah Lewis
- Pediatric Clinical Pharmacology & Toxicology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
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Trivellato S, Mengato D, Donà D, De Pieri M, Venturini F. Monoclonal antibodies for the early treatment of paediatric COVID-19 patients: a tangible contribution from hospital pharmacists in the lack of evidence. Eur J Hosp Pharm 2023; 30:e33. [PMID: 36202594 PMCID: PMC10647879 DOI: 10.1136/ejhpharm-2022-003562] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
| | - Daniele Mengato
- Hospital Pharmacy Department, Padua University Hospital, Padova, Italy
| | - Daniele Donà
- Department for Women's and Children's Health, Division of Pediatric Infectious Diseases, Padua University Hospital, Padova, Italy
| | - Marica De Pieri
- Department for Women's and Children's Health, Division of Pediatric Infectious Diseases, Padua University Hospital, Padova, Italy
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Faraj A, van Wijk RC, Neuman L, Desai S, Blouse GE, Knudsen T, Simonsson USH. Model-informed pediatric dose selection of marzeptacog alfa (activated): An exposure matching strategy. CPT Pharmacometrics Syst Pharmacol 2023; 12:977-987. [PMID: 37042339 PMCID: PMC10349190 DOI: 10.1002/psp4.12967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 02/13/2023] [Accepted: 03/20/2023] [Indexed: 04/13/2023] Open
Abstract
Marzeptacog alfa (activated) (MarzAA) is an activated recombinant human rFVII variant intended for subcutaneous (s.c.) administration to treat or prevent bleeding in individuals with hemophilia A (HA) or B (HB) with inhibitors, and other rare bleeding disorders. The s.c. administration provides benefits over i.v. injections. The objective of the study was to support the first-in-pediatric dose selection for s.c. MarzAA to treat episodic bleeding episodes in children up through 11 years in a registrational phase III trial. Assuming the same exposure-response relationship as in adults, an exposure matching strategy was used with a population pharmacokinetics model. A sensitivity analysis evaluating the impact of doubling in absorption rate and age-dependent allometric exponents on dose selection was performed. Subsequently, the probability of trial success, defined as the number of successful trials for a given pediatric dose divided by the number of simulated trials (n = 1000) was studied. A successful trial was defined as outcome where four, three, or two out of 24 pediatric subjects per trial were allowed to fall outside the adult exposures after s.c. administration of 60 μg/kg. A dose of 60 μg/kg in children with HA/HB was supported by the clinical trial simulations to match exposures in adults. The sensitivity analyses further supported selection of the 60 μg/kg dose level in all age groups. Moreover, the probability of trial success evaluations given a plausible design confirmed the potential of a 60 μg/kg dose level. Taken together, this work demonstrates the utility of model-informed drug development and could be helpful for other pediatric development programs for rare diseases.
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Affiliation(s)
- Alan Faraj
- Department of Pharmaceutical BiosciencesUppsala UniversityUppsalaSweden
| | - Rob C. van Wijk
- Department of Pharmaceutical BiosciencesUppsala UniversityUppsalaSweden
| | - Linda Neuman
- Catalyst BiosciencesSouth San FranciscoCaliforniaUSA
| | | | | | - Tom Knudsen
- Catalyst BiosciencesSouth San FranciscoCaliforniaUSA
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Temrikar ZH, Golden JE, Jonsson CB, Meibohm B. Clinical and Translational Pharmacology Considerations for Anti-infectives Approved Under the FDA Animal Rule. Clin Pharmacokinet 2023; 62:943-953. [PMID: 37326917 PMCID: PMC10471120 DOI: 10.1007/s40262-023-01267-x] [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] [Accepted: 05/21/2023] [Indexed: 06/17/2023]
Abstract
The US Food and Drug Administration's Animal Rule provides a pathway for approval of drugs and biologics aimed to treat serious or life-threatening conditions wherein traditional clinical trials are either not ethical or feasible. In such a scenario, determination of safety and efficacy are based on integration of data on drug disposition and drug action collected from in vitro models, infected animals, and healthy volunteer human studies. The demonstration of clinical efficacy and safety in humans based on robust, well-controlled animal studies is filled with challenges. This review elaborates on the challenges in the translation of data from in vitro and animal models to human dosing for antimicrobials. In this context, it discusses precedents of drugs approved under the Animal Rule, along with the approaches and guidance undertaken by sponsors.
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Affiliation(s)
- Zaid H Temrikar
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN, 38163, USA
| | - Jennifer E Golden
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI, USA
| | - Colleen B Jonsson
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN, 38163, USA
- Department of Microbiology, Immunology, Biochemistry, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
- Regional Biocontainment Laboratory, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Bernd Meibohm
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN, 38163, USA.
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Lim A, Sharma P, Stepanov O, Reddy VP. Application of Modelling and Simulation Approaches to Predict Pharmacokinetics of Therapeutic Monoclonal Antibodies in Pediatric Population. Pharmaceutics 2023; 15:pharmaceutics15051552. [PMID: 37242793 DOI: 10.3390/pharmaceutics15051552] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/11/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
Ethical regulations and limited paediatric participants are key challenges that contribute to a median delay of 6 years in paediatric mAb approval. To overcome these barriers, modelling and simulation methodologies have been adopted to design optimized paediatric clinical studies and reduce patient burden. The classical modelling approach in paediatric pharmacokinetic studies for regulatory submissions is to apply body weight-based or body surface area-based allometric scaling to adult PK parameters derived from a popPK model to inform the paediatric dosing regimen. However, this approach is limited in its ability to account for the rapidly changing physiology in paediatrics, especially in younger infants. To overcome this limitation, PBPK modelling, which accounts for the ontogeny of key physiological processes in paediatrics, is emerging as an alternative modelling strategy. While only a few mAb PBPK models have been published, PBPK modelling shows great promise demonstrating a similar prediction accuracy to popPK modelling in an Infliximab paediatric case study. To facilitate future PBPK studies, this review consolidated comprehensive data on the ontogeny of key physiological processes in paediatric mAb disposition. To conclude, this review discussed different use-cases for pop-PK and PBPK modelling and how they can complement each other to increase confidence in pharmacokinetic predictions.
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Affiliation(s)
- Andrew Lim
- Clinical Pharmacology and Pharmacometrics, Biopharmaceuticals R&D, AstraZeneca, Cambridge CB2 8PA, UK
- Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
| | - Pradeep Sharma
- Clinical Pharmacology and Pharmacometrics, Biopharmaceuticals R&D, AstraZeneca, Cambridge CB2 8PA, UK
| | - Oleg Stepanov
- Clinical Pharmacology and Pharmacometrics, Biopharmaceuticals R&D, AstraZeneca, Cambridge CB2 8PA, UK
| | - Venkatesh Pilla Reddy
- Clinical Pharmacology and Pharmacometrics, Biopharmaceuticals R&D, AstraZeneca, Cambridge CB2 8PA, UK
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12
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Levälampi T, Kärki J, Rebane K, Vähäsalo P, Malin M, Kröger L, Grönlund MM, Backström M, Pohjankoski H, Kautiainen H, Jokiranta S, Aalto K. Etanercept for patients with juvenile idiopathic arthritis: drug levels and influence of concomitant methotrexate: observational study. Pediatr Rheumatol Online J 2023; 21:27. [PMID: 36949461 PMCID: PMC10035115 DOI: 10.1186/s12969-023-00801-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 02/14/2023] [Indexed: 03/24/2023] Open
Abstract
BACKGROUND Etanercept (ETN) is widely used tumour necrosis factor (TNF) blocker in the treatment of juvenile idiopathic arthritis (JIA) when traditional synthetic disease modifying antirheumatic drug (sDMARD) therapy is not sufficient. There is limited information about the effects of methotrexate (MTX) on serum ETN concentration in children with JIA. We aimed to investigate whether ETN dose and concomitant MTX would effect ETN serum trough levels in JIA patients, and whether concomitant MTX have an influence on the clinical response in patients with JIA receiving ETN. METHODS In this study, we collected the medical record data of 180 JIA patients from eight Finnish pediatric rheumatological centres. All these patients were treated with ETN monotherapy or combination therapy with DMARD. To evaluate the ETN concentrations, blood samples of the patients were collected between injections right before the subsequent drug. Free ETN level was measured from serum. RESULTS Ninety-seven (54%) of the patients used concomitant MTX, and 83 (46%) received either ETN monotherapy or used sDMARDs other than MTX. A significant correlation was noted between ETN dose and drug level [r = 0.45 (95% CI: 0.33-0.56)]. The ETN dose and serum drug level were correlated (p = 0.030) in both subgroups - in MTX group [r = 0.35 (95% CI: 0.14-0.52)] and in non-MTX group [r = 0.54 (95% CI: 0.39-0.67)]. CONCLUSION In the present study, we found that concomitant MTX had no effect on serum ETN concentration or on clinical response. In addition, a significant correlation was detected between ETN dose and ETN concentration.
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Affiliation(s)
- Tiina Levälampi
- Pediatric Research Center, New Children's Hospital, Helsinki University Hospital, University of Helsinki, Helsinki, Finland.
| | - Johanna Kärki
- Department of Pediatrics, Kanta-Häme Central Hospital, Hämeenlinna, Finland
| | - Katariina Rebane
- Pediatric Research Center, New Children's Hospital, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Paula Vähäsalo
- PEDEGO Research Unit, University of Oulu, Oulu, Finland
- Department of Pediatrics, Oulu University Hospital, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Merja Malin
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
| | - Liisa Kröger
- Department of Pediatrics, Kuopio University Hospital, Kuopio, Finland
| | | | - Maria Backström
- PEDEGO Research Unit, University of Oulu, Oulu, Finland
- Department of Paediatrics, The Wellbeing Services County of Ostrobothnia, Vaasa, Finland
| | - Heini Pohjankoski
- Department of Pediatrics, Päijät-Häme Central Hospital, Lahti, Finland
| | - Hannu Kautiainen
- Primary Health Care Unit, Kuopio University Hospital, Kuopio, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Sakari Jokiranta
- Department of Bacteriology and Immunology, University of Helsinki, MedicumHelsinki, Finland
- Tammer BioLab Ltd, Tampere, Finland
| | - Kristiina Aalto
- Pediatric Research Center, New Children's Hospital, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
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13
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Verstegen RHJ, Shrader P, Balevic SJ, Beukelman T, Correll C, Dennos A, Phillips T, Feldman BM. Dosing Variation at Initiation of Adalimumab and Etanercept and Clinical Outcomes in Juvenile Idiopathic Arthritis: A Childhood Arthritis and Rheumatology Research Alliance Registry Study. Arthritis Care Res (Hoboken) 2023; 75:410-422. [PMID: 35040593 DOI: 10.1002/acr.24859] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 12/16/2021] [Accepted: 01/11/2022] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To determine the dose-response relationship of tumor necrosis factor (TNF) inhibition in the treatment of juvenile idiopathic arthritis (JIA). METHODS Participants of the Childhood Arthritis and Rheumatology Research Alliance Registry were eligible for inclusion in the analyses if they started TNF inhibition treatment for JIA. The primary treatment response was determined 3 to 7 months after the start of treatment, based on the JIA American College of Rheumatology Pediatric criteria for improvement, clinical Juvenile Arthritis Disease Activity Score, and persistence of treatment after 6 months. Subsequently, pooled logistic regression models were performed to include long-term follow-up data. The models were adjusted for risk factors associated with poor treatment response. Dosing was expressed by body weight, body surface area, ideal body weight, fat free mass, and lean body mass. RESULTS Participants treated with adalimumab (n = 328) and etanercept (n = 437) were included in the analyses (median dose 0.82 mg/kg body weight [interquartile range (IQR) 0.66-1.04] and 0.83 mg/kg body weight [IQR 0.75-0.95], respectively). The majority of analyses did not show a relationship between dose and outcome. Where associations were found, results were conflicting. Alternative dosing characteristics based on ideal body weight, fat free mass, and lean body mass did not result in stronger or more consistent associations. CONCLUSION This study was not able to confirm our hypothesis that increased dosing of TNF inhibitors results in improved treatment outcomes. Although adjustment was performed for risk factors of impaired treatment response, residual confounding by indication likely explains the negative associations found in this study.
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Affiliation(s)
- Ruud H J Verstegen
- The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | | | | | | | - Colleen Correll
- University of Minnesota Masonic Children's Hospital, Minneapolis
| | | | | | - Brian M Feldman
- The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
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14
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Abrams EJ, Capparelli E, Ruel T, Mirochnick M. Potential of Long-Acting Products to Transform the Treatment and Prevention of Human Immunodeficiency Virus (HIV) in Infants, Children, and Adolescents. Clin Infect Dis 2022; 75:S562-S570. [PMID: 36410381 PMCID: PMC10200315 DOI: 10.1093/cid/ciac754] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Long-acting antiretroviral products have the potential to transform human immunodeficiency virus (HIV) prevention and treatment approaches in pediatric populations. Broadly neutralizing antibodies and/or long-acting antiretroviral formulations by injection could dramatically improve provision of HIV prophylaxis and/or early treatment to newborns and infants at risk of HIV infection. Challenges in daily oral antiretroviral administration to toddlers and school age children living with HIV may be relieved by use of long-acting formulations, but the pharmacokinetics and safety of these products in children must be studied before they can enter routine clinical use. Although some initial studies of broadly neutralizing antibodies and injectable long-acting agents in infants and young children are underway, more studies of these and other long-acting products are needed. For many adolescents, compliance with daily medication administration is especially challenging. Long-acting products hold particular promise for adolescents living with HIV as well as those at high risk of HIV acquisition, and adolescents can usually be included in the drug development pipeline simultaneously with adults. Long-acting products have the potential to provide alternatives to lifelong daily oral drug administration across the pediatric age spectrum, leading to more effective prevention and treatment of HIV infection in infants, children, and adolescents.
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Affiliation(s)
- Elaine J Abrams
- ICAP at Columbia University, Mailman School of Public Health, Columbia University, New York, New York, USA
- Department of Pediatrics, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Edmund Capparelli
- Department of Pediatrics and Clinical Pharmacy, University of California San Diego, La Jolla, California, USA
| | - Theodore Ruel
- Department of Pediatrics, University of California San Francisco, San Francisco, California, USA
| | - Mark Mirochnick
- Department of Pediatrics, Boston University, Boston, Massachusetts, USA
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15
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Alkholifi FK, Alsaffar RM. Dostarlimab an Inhibitor of PD-1/PD-L1: A New Paradigm for the Treatment of Cancer. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:1572. [PMID: 36363529 PMCID: PMC9694305 DOI: 10.3390/medicina58111572] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/24/2022] [Accepted: 10/26/2022] [Indexed: 07/04/2024]
Abstract
Immunomodulation checkpoints usually adopted by healthy cells by tumors might cause an imbalance between host surveillance and tumor progression. Several tumors are incredibly resistant to standard treatment. The dynamic and long-lasting tumor regressions caused by antibodies targeting the PD-1/PD-L1 checkpoint have suggested a rebalancing of the host-tumor relationship. Checkpoint antibody inhibitors, like anti-PD-1/PD-L1, are unique inhibitors that reduce tumor growth by modulating the interaction between immune cells and tumor cells. These checkpoint inhibitors are swiftly emerging as a highly promising strategy for treating cancer because they produce impressive antitumor responses while having a limited number of adverse effects. Over the past several years, numerous checkpoint antibody inhibitors pointing to PD-1, PDL-1, and CTLA-4 have been available on the market. Despite its enormous success and usefulness, the anti-PD treatment response is restricted to certain kinds of cancer. This restriction can be attributed to the inadequate and diverse PD-1 expression in the tumor (MET) micro-environment. Dostarlimab (TSR-042), a drug that interferes with the PD-1/PD-L1 pathway, eliminates a crucial inhibitory response of an immune system and, as a result, has the potential to cause severe or deadly immune-mediated adverse effects. As cancer immunotherapy, dostarlimab enhances the antitumor immune response of the body.
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Affiliation(s)
- Faisal K. Alkholifi
- Department of Pharmacology & Toxicology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
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16
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Mahmood I. A Simple Method for the Prediction of Therapeutic Proteins (Monoclonal and Polyclonal Antibodies and Non-Antibody Proteins) for First-in-Pediatric Dose Selection: Application of Salisbury Rule. Antibodies (Basel) 2022; 11:antib11040066. [PMID: 36278619 PMCID: PMC9590058 DOI: 10.3390/antib11040066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 11/29/2022] Open
Abstract
In order to conduct a pediatric clinical trial, it is important to optimize pediatric dose as accurately as possible. In this study, a simple weight-based method known as ‘Salisbury Rule’ was used to predict pediatric dose for therapeutic proteins and was then compared with the observed pediatric dose. The observed dose was obtained mainly from the FDA package insert and if dosing information was not available from the FDA package insert then the observed dose was based on the dose given to an age group in a particular study. It was noted that the recommended doses of most of the therapeutic proteins were extrapolated to pediatrics from adult dose based on per kilogram (kg) body weight basis. Since it is widely believed that pediatric dose should be selected based on the pediatric clearance (CL), a CL based pediatric dose was projected from the following equation: Dose in children = Adult dose × (Observed CL in children/Observed adult CL). In this study, this dose was also considered observed pediatric dose for comparison. A ±30% prediction error (predicted vs. observed) was considered acceptable. There were 21 monoclonal antibodies, 5 polyclonal antibodies in children ≥ 2 years of age, 4 polyclonal antibodies in preterm and term neonates, and 11 therapeutic proteins (non-antibodies) in the study. In children < 30 kg body weight, the predicted doses were within 0.5−1.5-fold prediction error for 87% (monoclonal antibody), 100% (polyclonal antibody), and 92% (non-antibodies) observations. In children > 30 kg body weight, the predicted doses were within 0.5−1.5-fold prediction error for 96% (monoclonal antibody), 100% (polyclonal antibody), and 100% (non-antibodies) observations. The Salisbury Rule mimics more to CL-based dose rather than per kg body weight-based extrapolated dose from adults. The Salisbury Rule for the pediatric dose prediction can be used to select first-in-children dose in pediatric clinical trials and may be in clinical settings.
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Affiliation(s)
- Iftekhar Mahmood
- Mahmood Clinical Pharmacology Consultancy, LLC 1709, Piccard DR, Rockville, MD 20850, USA
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17
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Huang W, Stader F, Chan P, Shemesh CS, Chen Y, Gill KL, Jones HM, Li L, Rossato G, Wu B, Jin JY, Chanu P. Development of a pediatric physiologically-based pharmacokinetic model to support recommended dosing of atezolizumab in children with solid tumors. Front Pharmacol 2022; 13:974423. [PMID: 36225583 PMCID: PMC9548535 DOI: 10.3389/fphar.2022.974423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Atezolizumab has been studied in multiple indications for both pediatric and adult patient populations. Generally, clinical studies enrolling pediatric patients may not collect sufficient pharmacokinetic data to characterize the drug exposure and disposition because of operational, ethical, and logistical challenges including burden to children and blood sample volume limitations. Therefore, mechanistic modeling and simulation may serve as a tool to predict and understand the drug exposure in pediatric patients. Objective: To use mechanistic physiologically-based pharmacokinetic (PBPK) modeling to predict atezolizumab exposure at a dose of 15 mg/kg (max 1,200 mg) in pediatric patients to support dose rationalization and label recommendations. Methods: A minimal mechanistic PBPK model was used which incorporated age-dependent changes in physiology and biochemistry that are related to atezolizumab disposition such as endogenous IgG concentration and lymph flow. The PBPK model was developed using both in vitro data and clinically observed data in adults and was verified across dose levels obtained from a phase I and multiple phase III studies in both pediatric patients and adults. The verified model was then used to generate PK predictions for pediatric and adult subjects ranging from 2- to 29-year-old. Results: Individualized verification in children and in adults showed that the simulated concentrations of atezolizumab were comparable (76% within two-fold and 90% within three-fold, respectively) to the observed data with no bias for either over- or under-prediction. Applying the verified model, the predicted exposure metrics including Cmin, Cmax, and AUCtau were consistent between pediatric and adult patients with a geometric mean of pediatric exposure metrics between 0.8- to 1.25-fold of the values in adults. Conclusion: The results show that a 15 mg/kg (max 1,200 mg) atezolizumab dose administered intravenously in pediatric patients provides comparable atezolizumab exposure to a dose of 1,200 mg in adults. This suggests that a dose of 15 mg/kg will provide adequate and effective atezolizumab exposure in pediatric patients from 2- to 18-year-old.
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Affiliation(s)
- Weize Huang
- Genentech Inc, South San Francisco, CA, United States
- *Correspondence: Weize Huang,
| | | | - Phyllis Chan
- Genentech Inc, South San Francisco, CA, United States
| | | | - Yuan Chen
- Genentech Inc, South San Francisco, CA, United States
| | | | | | - Linzhong Li
- Certara UK Limited, Sheffield, United Kingdom
| | | | - Benjamin Wu
- Genentech Inc, South San Francisco, CA, United States
| | - Jin Y. Jin
- Genentech Inc, South San Francisco, CA, United States
| | - Pascal Chanu
- Genentech Inc, South San Francisco, CA, United States
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18
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Rossi F, Tortora C, Paoletta M, Marrapodi MM, Argenziano M, Di Paola A, Pota E, Di Pinto D, Di Martino M, Iolascon G. Osteoporosis in Childhood Cancer Survivors: Physiopathology, Prevention, Therapy and Future Perspectives. Cancers (Basel) 2022; 14:4349. [PMID: 36139510 PMCID: PMC9496695 DOI: 10.3390/cancers14184349] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/01/2022] [Accepted: 09/06/2022] [Indexed: 11/29/2022] Open
Abstract
The improvement of chemotherapy, radiotherapy, and surgical interventions, together with hematopoietic stem cell transplantation, increased childhood cancer survival rate in the last decades, reaching 80% in Europe. Nevertheless, anti-cancer treatments are mainly responsible for the onset of long-term side effects in childhood cancer survivors (CCS), including alterations of the endocrine system function and activity. In particular, the most frequent dysfunction in CCS is a metabolic bone disorder characterized by low bone mineral density (BMD) with increased skeletal fragility. BMD loss is also a consequence of a sedentary lifestyle, malnutrition, and cancer itself could affect BMD, thus inducing osteopenia and osteoporosis. In this paper, we provide an overview of possible causes of bone impairment in CCS in order to propose management strategies for early identification and treatment of skeletal fragility in this population.
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Affiliation(s)
- Francesca Rossi
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Chiara Tortora
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Marco Paoletta
- Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy
| | - Maria Maddalena Marrapodi
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Maura Argenziano
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Alessandra Di Paola
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Elvira Pota
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Daniela Di Pinto
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Martina Di Martino
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 4, 80138 Napoli, Italy
| | - Giovanni Iolascon
- Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy
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Petric Z, Goncalves J, Paixao P. Under the Umbrella of Clinical Pharmacology: Inflammatory Bowel Disease, Infliximab and Adalimumab, and a Bridge to an Era of Biosimilars. Pharmaceutics 2022; 14:1766. [PMID: 36145514 PMCID: PMC9505802 DOI: 10.3390/pharmaceutics14091766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/15/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
Monoclonal antibodies (MAbs) have revolutionized the treatment of many chronic inflammatory diseases, including inflammatory bowel disease (IBD). IBD is a term that comprises two quite similar, yet distinctive, disorders-Crohn's disease (CD) and ulcerative colitis (UC). Two blockbuster MAbs, infliximab (IFX) and adalimumab (ADL), transformed the pharmacological approach of treating CD and UC. However, due to the complex interplay of pharmacology and immunology, MAbs face challenges related to their immunogenicity, effectiveness, and safety. To ease the burden of IBD and other severe diseases, biosimilars have emerged as a cost-effective alternative to an originator product. According to the current knowledge, biosimilars of IFX and ADL in IBD patients are shown to be as safe and effective as their originators. The future of biosimilars, in general, is promising due to the potential of making the health care system more sustainable. However, their use is accompanied by misconceptions regarding their effectiveness and safety, as well as by controversy regarding their interchangeability. Hence, until a scientific consensus is achieved, scientific data on the long-term effectiveness and safety of biosimilars are needed.
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Affiliation(s)
- Zvonimir Petric
- Department of Pharmacological Sciences, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-004 Lisboa, Portugal
| | - Joao Goncalves
- Biopharmaceutical and Molecular Biotechnology Unit, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-004 Lisboa, Portugal
| | - Paulo Paixao
- Department of Pharmacological Sciences, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-004 Lisboa, Portugal
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20
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Vugmeyster Y, Grisic AM, Brockhaus B, Rueckert P, Ruisi M, Dai H, Khandelwal A. Avelumab Dose Selection for Clinical Studies in Pediatric Patients with Solid Tumors. Clin Pharmacokinet 2022; 61:985-995. [PMID: 35484319 PMCID: PMC9287219 DOI: 10.1007/s40262-022-01111-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2022] [Indexed: 01/04/2023]
Abstract
BACKGROUND AND OBJECTIVE A phase I/II trial evaluated the safety, antitumor activity, and pharmacokinetics of avelumab (anti-PD-L1 antibody) in pediatric patients with refractory/relapsed solid tumors (NCT03451825). This study aimed to inform avelumab dose selection in pediatric populations using population pharmacokinetic modeling and simulations. METHODS Patients aged < 18 years with refractory/relapsed solid tumors enrolled in phase I received avelumab 10 or 20 mg/kg intravenously every 2 weeks. A pediatric population pharmacokinetic model was developed via the frequentist prior approach. RESULTS Pharmacokinetic parameters from 21 patients who received avelumab 10 mg/kg (n = 6) or 20 mg/kg (n = 15) were analyzed. Patients had a wide range of weights and ages (medians, 37.3 kg and 12 years). Exposures with 10-mg/kg dosing were lower vs adult dosing, particularly in patients weighing < 40 kg, whereas 20-mg/kg dosing achieved or exceeded adult exposures, irrespective of body weight. A two-compartment linear model with time-varying clearance using body weight as a covariate, with the frequentist prior approach, best described pediatric data. In this model, optimal overlap in exposure with adult data was achieved with 800 mg every 2 weeks for patients aged ≥ 12 years and weighing ≥ 40 kg, and 15 mg/kg every 2 weeks for patients aged < 12 years or weighing < 40 kg. CONCLUSIONS Based on exposure matching, the recommended doses for further avelumab studies, including combination studies, are 15 mg/kg every 2 weeks for pediatric patients aged < 12 years or weighing < 40 kg and the adult flat dose of 800 mg every 2 weeks for pediatric patients aged ≥ 12 years and weighing ≥ 40 kg. CLINICAL TRIAL REGISTRATION ClinicalTrials.gov NCT03451825.
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Affiliation(s)
- Yulia Vugmeyster
- EMD Serono Research & Development Institute, Inc. (an affiliate of Merck KGaA), Billerica, MA, USA
| | - Ana-Marija Grisic
- Merck Healthcare KGaA, Frankfurter Strasse 250, 64293, Darmstadt, Germany
| | - Brigitte Brockhaus
- Merck Healthcare KGaA, Frankfurter Strasse 250, 64293, Darmstadt, Germany
| | - Peter Rueckert
- Merck Healthcare KGaA, Frankfurter Strasse 250, 64293, Darmstadt, Germany
| | - Mary Ruisi
- EMD Serono Research & Development Institute, Inc. (an affiliate of Merck KGaA), Billerica, MA, USA
| | - Haiqing Dai
- EMD Serono Research & Development Institute, Inc. (an affiliate of Merck KGaA), Billerica, MA, USA
| | - Akash Khandelwal
- Merck Healthcare KGaA, Frankfurter Strasse 250, 64293, Darmstadt, Germany.
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21
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Gill KL, Jones HM. Opportunities and Challenges for PBPK Model of mAbs in Paediatrics and Pregnancy. AAPS J 2022; 24:72. [PMID: 35650328 DOI: 10.1208/s12248-022-00722-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/20/2022] [Indexed: 12/20/2022] Open
Abstract
New drugs may in some cases need to be tested in paediatric and pregnant patients. However, it is difficult to recruit such patients and there are many ethical issues around their inclusion in clinical trials. Modelling and simulation can help to plan well-designed clinical trials with a reduced number of participants and to bridge gaps where recruitment is difficult. Physiologically based pharmacokinetic (PBPK) models for small molecule drugs have been used to aid study design and dose adjustments in paediatrics and pregnancy, with several publications in the literature. However, published PBPK models for monoclonal antibodies (mAb) in these populations are scarce. Here, the current status of mAb PBPK models in paediatrics and pregnancy is discussed. Seven mAb PBPK models published for paediatrics were found, which report good prediction accuracy across a wide age range. No mAb PBPK models for pregnant women have been published to date. Current challenges to the development of such PBPK models are discussed, including gaps in our knowledge of relevant physiological processes and availability of clinical data to verify models. As the availability of such data increases, it will help to improve our confidence in the PBPK model predictive ability. Advantages for using PBPK models to predict mAb PK in paediatrics and pregnancy are discussed. For example, the ability to incorporate ontogeny and gestational changes in physiology, prediction of maternal, placental and foetal exposure and the ability to make predictions from in vitro and preclinical data prior to clinical data being available.
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Affiliation(s)
- Katherine L Gill
- Certara UK Limited, Simcyp Division, Level 2-Acero, 1 Concourse Way, Sheffield, S1 2BJ, UK.
| | - Hannah M Jones
- Certara UK Limited, Simcyp Division, Level 2-Acero, 1 Concourse Way, Sheffield, S1 2BJ, UK
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Nassar-Sheikh Rashid A, Schonenberg-Meinema D, Berends SE, van den Berg JM, Mathôt RAA. Population Pharmacokinetics of Infliximab in Children with Juvenile Idiopathic Arthritis. Ther Drug Monit 2022; 44:301-307. [PMID: 34292215 DOI: 10.1097/ftd.0000000000000914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/27/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The recommended infliximab (IFX) dose in (pediatric) rheumatology practice is 3-6 mg/kg every 4-8 weeks. Higher dosage regimens (>10 mg/kg) of IFX are effective and safe. To optimize IFX treatment in patients with juvenile idiopathic arthritis (JIA), therapeutic drug monitoring might be beneficial. To support routine therapeutic drug monitoring of IFX and regimen optimization for patients with JIA, in-depth knowledge of the pharmacokinetic (PK) variability of IFX is needed. As soon as the optimal therapeutic drug ranges are known, PK model-based simulation can be used to individualize drug dosing recommendations. In this study, a population PK model for IFX is described for patients with JIA. METHODS Data including IFX trough concentrations and anti-IFX antibodies of 27 pediatric patients with JIA on IFX maintenance treatment were retrieved from electronic charts. Three population PK models from the literature were validated for the authors' data set using the nonlinear mixed-effects modeling program NONMEM. A novel population PK model was developed based on the study data. RESULTS A total of 65 blood samples obtained after a median of 32 days after the last IFX infusion (interquartile range 28-42) were analyzed. The 3 published models underpredicted the observed trough concentrations. A newly developed one-compartment model best described the data corresponding to IFX serum concentration over time in patients with JIA. CONCLUSIONS This study shows a novel PK model for IFX in patients with JIA. The data show that different PK models are needed for different age categories (children or adults) and different diseases.
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Affiliation(s)
- Amara Nassar-Sheikh Rashid
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands and Zaans Medical Center, Zaandam
| | - Dieneke Schonenberg-Meinema
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam ; and
| | - Sophie E Berends
- Department Hospital Pharmacy, Hospital Pharmacy, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands
| | - J Merlijn van den Berg
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam ; and
| | - Ron A A Mathôt
- Department Hospital Pharmacy, Hospital Pharmacy, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands
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23
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Di Chiara C, Mengato D, De Pieri M, Longo G, Benetti E, Venturini F, Giaquinto C, Donà D. Early Use of Sotrovimab in Children: A Case Report of an 11-Year-Old Kidney Transplant Recipient Infected with SARS-CoV-2. CHILDREN (BASEL, SWITZERLAND) 2022; 9:451. [PMID: 35455495 PMCID: PMC9028505 DOI: 10.3390/children9040451] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/19/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND The use of virus-neutralizing monoclonal antibodies has been approved in fragile populations, including kidney transplant recipients, who are at risk of developing severe COVID-19. Sotrovimab is the only currently available anti-SARS-CoV-2 neutralizing monoclonal antibody with activity against the new Omicron variant of concern. While sotrovimab has been approved in adolescents and adults, studies regarding its efficacy and safety in children aged less than 12 years old and weighing less than 40 kg are still lacking. Here, we report a first case of a child, who was treated early with sotrovimab after a kidney transplant. CASE REPORT At the end of January 2022, a 11-year-old male child underwent a deceased-donor kidney transplant and became infected with SARS-CoV-2 during the first day after surgery. Due to the increased risk of developing severe COVID-19, based on the predominance of Omicron and the patient's renal function, the child was treated with sotrovimab. The clinical course was successful and no adverse reactions were reported. CONCLUSIONS For the first time, we report the well-tolerated use of sotrovimab in children under 12 years old. As the pandemic affects children across the globe, urgent data on sotrovimab dosing in children with a higher risk of developing severe COVID-19 are needed.
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Affiliation(s)
- Costanza Di Chiara
- Department for Women’s and Children’s Health, Division of Pediatric Infectious Diseases, University of Padua, 35128 Padua, Italy; (M.D.P.); (C.G.); (D.D.)
| | - Daniele Mengato
- Hospital Pharmacy Department, University Hospital of Padova, 35121 Padua, Italy; (D.M.); (F.V.)
| | - Marica De Pieri
- Department for Women’s and Children’s Health, Division of Pediatric Infectious Diseases, University of Padua, 35128 Padua, Italy; (M.D.P.); (C.G.); (D.D.)
| | - Germana Longo
- Department for Women’s and Children’s Health, Division of Pediatric Nefrology Unit, University of Padua, 35128 Padua, Italy; (G.L.); (E.B.)
| | - Elisa Benetti
- Department for Women’s and Children’s Health, Division of Pediatric Nefrology Unit, University of Padua, 35128 Padua, Italy; (G.L.); (E.B.)
| | - Francesca Venturini
- Hospital Pharmacy Department, University Hospital of Padova, 35121 Padua, Italy; (D.M.); (F.V.)
| | - Carlo Giaquinto
- Department for Women’s and Children’s Health, Division of Pediatric Infectious Diseases, University of Padua, 35128 Padua, Italy; (M.D.P.); (C.G.); (D.D.)
| | - Daniele Donà
- Department for Women’s and Children’s Health, Division of Pediatric Infectious Diseases, University of Padua, 35128 Padua, Italy; (M.D.P.); (C.G.); (D.D.)
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Meibohm B. Knowledge Gaps in the Pharmacokinetics of Therapeutic Proteins in Pediatric Patients. Front Pharmacol 2022; 13:847021. [PMID: 35222051 PMCID: PMC8866711 DOI: 10.3389/fphar.2022.847021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 01/24/2022] [Indexed: 01/04/2023] Open
Abstract
Therapeutic proteins such as monoclonal antibodies and their derivatives, fusions proteins, hormone analogs and enzymes for replacement therapy are an ever-growing mainstay in our pharmacopoeia. While a growing number of these medications are developed for and used in younger and younger pediatric patients, knowledge gaps in the basic understanding of the molecular and physiologic processes governing the disposition of these compounds in the human body and their modulation by age and childhood development are a hindrance to the effective and timely development and clinical use of these compounds, especially in very young pediatric patient populations. This is particularly the case for the widespread lack of information on the ontogeny and age-associated expression and function of receptor systems that are involved in the molecular processes driving the pharmacokinetics of these compounds. This article briefly highlights three receptor systems as examples, the neonatal Fc receptor, the asialoglycoprotein receptor, and the mannose receptor. It furthermore provides suggestions on how these gaps should be addressed and prioritized to provide the field of pediatric clinical pharmacology the urgently needed tools for a more effective development and clinical utilization of this important class of drugs with rapidly evolving importance as cornerstone in pediatric pharmacotherapy.
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25
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Krache A, Fontan C, Pestourie C, Bardiès M, Bouvet Y, Payoux P, Chatelut E, White-Koning M, Salabert AS. Preclinical Pharmacokinetics and Dosimetry of an 89Zr Labelled Anti-PDL1 in an Orthotopic Lung Cancer Murine Model. Front Med (Lausanne) 2022; 8:741855. [PMID: 35174180 PMCID: PMC8841431 DOI: 10.3389/fmed.2021.741855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 12/06/2021] [Indexed: 12/24/2022] Open
Abstract
Anti-PDL1 is a monoclonal antibody targeting the programmed death-cell ligand (PD-L1) by blocking the programmed death-cell (PD-1)/PD-L1 axis. It restores the immune system response in several tumours, such as non-small cell lung cancer (NSCLC). Anti-PDL1 or anti-PD1 treatments rely on PD-L1 tumoural expression assessed by immunohistochemistry on biopsy tissue. However, depending on the biopsy extraction site, PD-L1 expression can vary greatly. Non-invasive imaging enables whole-body mapping of PD-L1 sites and could improve the assessment of tumoural PD-L1 expression.MethodsPharmacokinetics (PK), biodistribution and dosimetry of a murine anti-PDL1 radiolabelled with zirconium-89, were evaluated in both healthy mice and immunocompetent mice with lung cancer. Preclinical PET (μPET) imaging was used to analyse [89Zr]DFO-Anti-PDL1 distribution in both groups of mice. Non-compartmental (NCA) and compartmental (CA) PK analyses were performed in order to describe PK parameters and assess area under the concentration-time curve (AUC) for dosimetry evaluation in humans.ResultsOrgan distribution was correctly estimated using PK modelling in both healthy mice and mice with lung cancer. Tumoural uptake occurred within 24 h post-injection of [89Zr]DFO-Anti-PDL1, and the best imaging time was at 48 h according to the signal-to-noise ratio (SNR) and image quality. An in vivo blocking study confirmed that [89Zr]DFO-anti-PDL1 specifically targeted PD-L1 in CMT167 lung tumours in mice. AUC in organs was estimated using a 1-compartment PK model and extrapolated to human (using allometric scaling) in order to estimate the radiation exposure in human. Human-estimated effective dose was 131 μSv/MBq.ConclusionThe predicted dosimetry was similar or lower than other antibodies radiolabelled with zirconium-89 for immunoPET imaging.
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Affiliation(s)
- Anis Krache
- CRCT, UMR 1037, Université de Toulouse, INSERM, Université Paul-Sabatier, Toulouse, France
- ToNIC, Toulouse NeuroImaging Center, UMR 1214, Université de Toulouse, INSERM, Université Paul-Sabatier, Toulouse, France
- General-Electric - Zionexa, Targeting Imaging and Therapy, Buc, France
- Anis Krache
| | - Charlotte Fontan
- General-Electric - Zionexa, Targeting Imaging and Therapy, Buc, France
| | - Carine Pestourie
- CREFRE (Centre Régional D'Exploration Fonctionnelle et Ressources Expérimentales) – INSERM UMS006, Plateforme GénoToul-Anexplo, Toulouse, France
- ENVT (Ecole Nationale Vétérinaire de Toulouse), Toulouse, France
| | - Manuel Bardiès
- IRCM (Institut de Recherche en Cancérologie de Montpellier), UMR 1194 INSERM, Université de Montpellier and ICM, Montpellier, France
- Département de Médecine Nucléaire, ICM (Institut du Cancer de Montpellier), Montpellier, France
| | - Yann Bouvet
- General-Electric - Zionexa, Targeting Imaging and Therapy, Buc, France
| | - Pierre Payoux
- ToNIC, Toulouse NeuroImaging Center, UMR 1214, Université de Toulouse, INSERM, Université Paul-Sabatier, Toulouse, France
- Centre Hospitalo-Universitaire de Toulouse, Toulouse, France
| | - Etienne Chatelut
- CRCT, UMR 1037, Université de Toulouse, INSERM, Université Paul-Sabatier, Toulouse, France
| | - Melanie White-Koning
- CRCT, UMR 1037, Université de Toulouse, INSERM, Université Paul-Sabatier, Toulouse, France
| | - Anne-Sophie Salabert
- ToNIC, Toulouse NeuroImaging Center, UMR 1214, Université de Toulouse, INSERM, Université Paul-Sabatier, Toulouse, France
- Centre Hospitalo-Universitaire de Toulouse, Toulouse, France
- *Correspondence: Anne-Sophie Salabert
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26
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Chang HP, Shakhnovich V, Frymoyer A, Funk RS, Becker ML, Park KT, Shah DK. A population physiologically-based pharmacokinetic model to characterize antibody disposition in pediatrics and evaluation of the model using infliximab. Br J Clin Pharmacol 2022; 88:290-302. [PMID: 34189743 PMCID: PMC8714867 DOI: 10.1111/bcp.14963] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/13/2021] [Accepted: 05/23/2021] [Indexed: 01/03/2023] Open
Abstract
AIMS In order to better predict the pharmacokinetics (PK) of antibodies in children, and to facilitate dose optimization of antibodies in paediatric patients, there is a need to develop systems PK models that integrate ontogeny-related changes in human physiological parameters. METHODS A population-based physiological-based PK (PBPK) model to characterize antibody PK in paediatrics has been developed, by incorporating age-related changes in body weight, organ weight, organ blood flow rate and interstitial volumes in a previously published platform model. The model was further used to perform Monte Carlo simulations to investigate clearance vs. age and dose-exposure relationships for infliximab. RESULTS By estimating only one parameter and associated interindividual variability, the model was able to characterize clinical PK of infliximab from two paediatric cohorts (n = 141, 4-19 years) reasonably well. Model simulations demonstrated that only 50% of children reached desired trough concentrations when receiving FDA-labelled dosing regimen for infliximab, suggesting that higher doses and/or more frequent dosing are needed to achieve target trough concentrations of this antibody. CONCLUSION The paediatric PBPK model presented here can serve as a framework to characterize the PK of antibodies in paediatric patients. The model can also be applied to other protein therapeutics to advance precision medicine paradigm and optimize antibody dosing regimens in children.
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Affiliation(s)
- Hsuan Ping Chang
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, Buffalo, NY, United States
| | - Valentina Shakhnovich
- Children's Mercy Kansas City, Kansas City, MO, United States
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, United States
| | - Adam Frymoyer
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States
| | - Ryan Sol Funk
- Department of Pharmacy Practice, University of Kansas School of Pharmacy, Kansas City, KS, United States
| | - Mara L. Becker
- Department of Pediatrics, Division of Rheumatology, Duke University, Durham, NC, United States
- Duke Clinical Research Institute, Durham, NC, United States
| | - K. T. Park
- Genentech, Inc., South San Francisco, CA, USA
| | - Dhaval K. Shah
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, Buffalo, NY, United States
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Pawaskar D, Chen X, Glassman F, May F, Roberts A, Biondo M, McKenzie A, Nolte MW, Jusko WJ, Tortorici M. Pharmacokinetic/pharmacodynamic modeling for dose selection for the first-in-human trial of the activated Factor XII inhibitor garadacimab (CSL312). Clin Transl Sci 2021; 15:709-720. [PMID: 34811931 PMCID: PMC8932701 DOI: 10.1111/cts.13192] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/17/2021] [Accepted: 10/11/2021] [Indexed: 12/19/2022] Open
Abstract
Factor XII (FXII) is a serine protease involved in multiple cascades, including the kallikrein–kinin system. It may play a role in diseases in which the downstream cascades are dysregulated, such as hereditary angioedema. Garadacimab (CSL312) is a first‐in‐class, fully human, monoclonal antibody targeting activated FXII (FXIIa). We describe how translational pharmacokinetic (PK) and pharmacodynamic (PD) modeling enabled dose selection for the phase I, first‐in‐human trial of garadacimab. The PK/PD data used for modeling were derived from preclinical PK/PD and safety studies. Garadacimab plasma concentrations rose with increasing dose, and clear dose‐related PD effects were observed (e.g., a mechanism‐based prolongation of activated partial thromboplastin time). The PK/PD profile from cynomolgus monkeys was used to generate minimal physiologically‐based pharmacokinetic (mPBPK) models with target‐mediated drug disposition (TMDD) for data prediction in cynomolgus monkeys. These models were later adapted for prediction of human data to establish dose selection. Based on the final mPBPK model with TMDD and assuming a weight of 70 kg for an adult human, a minimal inhibition (<10%) of FXIIa with a starting dose of 0.1 mg/kg garadacimab and a near maximal inhibition (>95%) at 10 mg/kg garadacimab were predicted. The phase I study is complete, and data on exposure profiles and inhibition of FXIIa‐mediated kallikrein activity observed in the trial support and validate these simulations. This emphasizes the utility and relevance of translational modeling and simulation in drug development.
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Affiliation(s)
| | - Xi Chen
- Genentech, San Francisco, California, USA
| | | | - Frauke May
- CSL Behring Innovation GmbH, Marburg, Germany
| | | | | | | | | | - William J Jusko
- School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, USA
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Pham-Huy A, Top KA, Constantinescu C, Seow CH, El-Chaâr D. Utilisation et incidence des agents biologiques à base d’anticorps monoclonaux durant la grossesse. CMAJ 2021; 193:E1537-E1544. [PMID: 34607850 PMCID: PMC8568088 DOI: 10.1503/cmaj.202391-f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Anne Pham-Huy
- Division d'infectiologie, immunologie et allergie (Pham-Huy), Hôpital pédiatrique de l'Est de l'Ontario; Faculté de médecine (Pham-Huy), Université d'Ottawa, Ottawa, Ont.; Centre de santé IWK, Division d'infectiologie, Centre canadien de vaccinologie (Top), Halifax, N.-É.; Faculté de médecine de l'Université de Calgary, Division d'infectiologie pédiatrique (Constantinescu); Division de gastro-entérologie et d'hépatologie (Seow), Départements de médecine et de sciences de la santé communautaire, Université de Calgary, Calgary, Alb.; Groupe de recherche OMNI de l'IRHO (El-Chaâr), Programme d'épidémiologie clinique; Service d'obstétrique, gynécologie et soins aux nouveau-nés (El-Chaâr), Hôpital d'Ottawa, Ottawa, Ont.
| | - Karina A Top
- Division d'infectiologie, immunologie et allergie (Pham-Huy), Hôpital pédiatrique de l'Est de l'Ontario; Faculté de médecine (Pham-Huy), Université d'Ottawa, Ottawa, Ont.; Centre de santé IWK, Division d'infectiologie, Centre canadien de vaccinologie (Top), Halifax, N.-É.; Faculté de médecine de l'Université de Calgary, Division d'infectiologie pédiatrique (Constantinescu); Division de gastro-entérologie et d'hépatologie (Seow), Départements de médecine et de sciences de la santé communautaire, Université de Calgary, Calgary, Alb.; Groupe de recherche OMNI de l'IRHO (El-Chaâr), Programme d'épidémiologie clinique; Service d'obstétrique, gynécologie et soins aux nouveau-nés (El-Chaâr), Hôpital d'Ottawa, Ottawa, Ont
| | - Cora Constantinescu
- Division d'infectiologie, immunologie et allergie (Pham-Huy), Hôpital pédiatrique de l'Est de l'Ontario; Faculté de médecine (Pham-Huy), Université d'Ottawa, Ottawa, Ont.; Centre de santé IWK, Division d'infectiologie, Centre canadien de vaccinologie (Top), Halifax, N.-É.; Faculté de médecine de l'Université de Calgary, Division d'infectiologie pédiatrique (Constantinescu); Division de gastro-entérologie et d'hépatologie (Seow), Départements de médecine et de sciences de la santé communautaire, Université de Calgary, Calgary, Alb.; Groupe de recherche OMNI de l'IRHO (El-Chaâr), Programme d'épidémiologie clinique; Service d'obstétrique, gynécologie et soins aux nouveau-nés (El-Chaâr), Hôpital d'Ottawa, Ottawa, Ont
| | - Cynthia H Seow
- Division d'infectiologie, immunologie et allergie (Pham-Huy), Hôpital pédiatrique de l'Est de l'Ontario; Faculté de médecine (Pham-Huy), Université d'Ottawa, Ottawa, Ont.; Centre de santé IWK, Division d'infectiologie, Centre canadien de vaccinologie (Top), Halifax, N.-É.; Faculté de médecine de l'Université de Calgary, Division d'infectiologie pédiatrique (Constantinescu); Division de gastro-entérologie et d'hépatologie (Seow), Départements de médecine et de sciences de la santé communautaire, Université de Calgary, Calgary, Alb.; Groupe de recherche OMNI de l'IRHO (El-Chaâr), Programme d'épidémiologie clinique; Service d'obstétrique, gynécologie et soins aux nouveau-nés (El-Chaâr), Hôpital d'Ottawa, Ottawa, Ont
| | - Darine El-Chaâr
- Division d'infectiologie, immunologie et allergie (Pham-Huy), Hôpital pédiatrique de l'Est de l'Ontario; Faculté de médecine (Pham-Huy), Université d'Ottawa, Ottawa, Ont.; Centre de santé IWK, Division d'infectiologie, Centre canadien de vaccinologie (Top), Halifax, N.-É.; Faculté de médecine de l'Université de Calgary, Division d'infectiologie pédiatrique (Constantinescu); Division de gastro-entérologie et d'hépatologie (Seow), Départements de médecine et de sciences de la santé communautaire, Université de Calgary, Calgary, Alb.; Groupe de recherche OMNI de l'IRHO (El-Chaâr), Programme d'épidémiologie clinique; Service d'obstétrique, gynécologie et soins aux nouveau-nés (El-Chaâr), Hôpital d'Ottawa, Ottawa, Ont
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Population pharmacokinetics of the anti-PD-1 antibody camrelizumab in patients with multiple tumor types and model-informed dosing strategy. Acta Pharmacol Sin 2021; 42:1368-1375. [PMID: 33154554 DOI: 10.1038/s41401-020-00550-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 09/29/2020] [Indexed: 12/19/2022] Open
Abstract
Camrelizumab, a programmed cell death 1 (PD-1) inhibitor, has been approved for the treatment of patients with relapsed or refractory classical Hodgkin lymphoma, nasopharyngeal cancer and non-small cell lung cancer. The aim of this study was to perform a population pharmacokinetic (PK) analysis of camrelizumab to quantify the impact of patient characteristics and to investigate the appropriateness of a flat dose in the dosing regimen. A total of 3092 camrelizumab concentrations from 133 patients in four clinical trials with advanced melanoma, relapsed or refractory classical Hodgkin lymphoma and other solid tumor types were analyzed using nonlinear mixed effects modeling. The PKs of camrelizumab were properly described using a two-compartment model with parallel linear and nonlinear clearance. Then, covariate model building was conducted using stepwise forward addition and backward elimination. The results showed that baseline albumin had significant effects on linear clearance, while actual body weight affected intercompartmental clearance. However, their impacts were limited, and no dose adjustments were required. The final model was further evaluated by goodness-of-fit plots, bootstrap procedures, and visual predictive checks and showed satisfactory model performance. Moreover, dosing regimens of 200 mg every 2 weeks and 3 mg/kg every 2 weeks provided similar exposure distributions by model-based Monte Carlo simulation. The population analyses demonstrated that patient characteristics have no clinically meaningful impact on the PKs of camrelizumab and present evidence for no advantage of either the flat dose or weight-based dose regimen for most patients with advanced solid tumors.
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Pham-Huy A, Top KA, Constantinescu C, Seow CH, El-Chaâr D. The use and impact of monoclonal antibody biologics during pregnancy. CMAJ 2021; 193:E1129-E1136. [PMID: 34312166 PMCID: PMC8321301 DOI: 10.1503/cmaj.202391] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Anne Pham-Huy
- Division of Infectious Diseases, Immunology and Allergy (Pham-Huy), Children's Hospital of Eastern Ontario; Faculty of Medicine (Pham-Huy), University of Ottawa, Ottawa, Ont.; IWK Health Centre, Division of Infectious Diseases, Canadian Center for Vaccinology (Top), Halifax, NS; University of Calgary Faculty of Medicine, Division of Pediatric Infectious Diseases (Constantinescu); Division of Gastroenterology and Hepatology (Seow), Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, Alta.; OHRI OMNI Research Group (El-Chaâr), Clinical Epidemiology Program; Department of Obstetrics, Gynecology and Newborn Care (El-Chaâr), Ottawa Hospital, Ottawa, Ont.
| | - Karina A Top
- Division of Infectious Diseases, Immunology and Allergy (Pham-Huy), Children's Hospital of Eastern Ontario; Faculty of Medicine (Pham-Huy), University of Ottawa, Ottawa, Ont.; IWK Health Centre, Division of Infectious Diseases, Canadian Center for Vaccinology (Top), Halifax, NS; University of Calgary Faculty of Medicine, Division of Pediatric Infectious Diseases (Constantinescu); Division of Gastroenterology and Hepatology (Seow), Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, Alta.; OHRI OMNI Research Group (El-Chaâr), Clinical Epidemiology Program; Department of Obstetrics, Gynecology and Newborn Care (El-Chaâr), Ottawa Hospital, Ottawa, Ont
| | - Cora Constantinescu
- Division of Infectious Diseases, Immunology and Allergy (Pham-Huy), Children's Hospital of Eastern Ontario; Faculty of Medicine (Pham-Huy), University of Ottawa, Ottawa, Ont.; IWK Health Centre, Division of Infectious Diseases, Canadian Center for Vaccinology (Top), Halifax, NS; University of Calgary Faculty of Medicine, Division of Pediatric Infectious Diseases (Constantinescu); Division of Gastroenterology and Hepatology (Seow), Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, Alta.; OHRI OMNI Research Group (El-Chaâr), Clinical Epidemiology Program; Department of Obstetrics, Gynecology and Newborn Care (El-Chaâr), Ottawa Hospital, Ottawa, Ont
| | - Cynthia H Seow
- Division of Infectious Diseases, Immunology and Allergy (Pham-Huy), Children's Hospital of Eastern Ontario; Faculty of Medicine (Pham-Huy), University of Ottawa, Ottawa, Ont.; IWK Health Centre, Division of Infectious Diseases, Canadian Center for Vaccinology (Top), Halifax, NS; University of Calgary Faculty of Medicine, Division of Pediatric Infectious Diseases (Constantinescu); Division of Gastroenterology and Hepatology (Seow), Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, Alta.; OHRI OMNI Research Group (El-Chaâr), Clinical Epidemiology Program; Department of Obstetrics, Gynecology and Newborn Care (El-Chaâr), Ottawa Hospital, Ottawa, Ont
| | - Darine El-Chaâr
- Division of Infectious Diseases, Immunology and Allergy (Pham-Huy), Children's Hospital of Eastern Ontario; Faculty of Medicine (Pham-Huy), University of Ottawa, Ottawa, Ont.; IWK Health Centre, Division of Infectious Diseases, Canadian Center for Vaccinology (Top), Halifax, NS; University of Calgary Faculty of Medicine, Division of Pediatric Infectious Diseases (Constantinescu); Division of Gastroenterology and Hepatology (Seow), Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, Alta.; OHRI OMNI Research Group (El-Chaâr), Clinical Epidemiology Program; Department of Obstetrics, Gynecology and Newborn Care (El-Chaâr), Ottawa Hospital, Ottawa, Ont
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Malik PRV, Temrikar ZH, Chelle P, Edginton AN, Meibohm B. Pediatric Dose Selection for Therapeutic Proteins. J Clin Pharmacol 2021; 61 Suppl 1:S193-S206. [PMID: 34185910 DOI: 10.1002/jcph.1829] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 01/26/2021] [Indexed: 12/12/2022]
Abstract
In selecting optimal dosing regimens in support of the clinical use of monoclonal antibodies and other therapeutic proteins in pediatric indications, the unique pharmacokinetic properties of this class of biologics, as well as the underlying physiologic and pathophysiologic processes and their modulation by childhood growth and development, needs to be appreciated. During drug development, first-in-pediatric dose selection is a capstone event in the pediatric investigation plan that relies heavily on extrapolation of pharmacokinetic and pharmacodynamic data from adult to pediatric populations. It is facilitated by combinations of pharmacometric approaches, including allometry, physiologically based pharmacokinetic modeling, and population pharmacokinetic analyses, although data on reliability and qualification of some of these tools in the context of therapeutic proteins are still limited but emerging. Presented data suggest nonlinear relationships between body weight and both clearance and volume of distribution for therapeutic proteins in pediatric populations, with allometric exponents of 0.75 and 0.8, respectively. For newborns and infants (<1 year), even higher nonlinearity seems to occur. Translation of the quantitative characterization of the pediatric pharmacokinetics of therapeutic proteins into dosing regimens for the drug label requires compromising between precision dosing and clinical practicability, with tiered dosing algorithms based on size or age strata being the currently most frequently applied methodology.
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Affiliation(s)
- Paul R V Malik
- School of Pharmacy, University of Waterloo, Waterloo, Ontario, Canada
| | - Zaid H Temrikar
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Pierre Chelle
- School of Pharmacy, University of Waterloo, Waterloo, Ontario, Canada
| | - Andrea N Edginton
- School of Pharmacy, University of Waterloo, Waterloo, Ontario, Canada
| | - Bernd Meibohm
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
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Cohen-Barak O, Radivojevic A, Jones A, Fiedler-Kelly J, Gillespie M, Brennan M, Gutman D, Rasamoelisolo M, Hallak H, Loupe P, Kessler Y, Ning X, Levi M, Ahn AH, Rabinovich-Guilatt L. Dose selection for fremanezumab (AJOVY) phase 3 pediatric migraine studies using pharmacokinetic data from a pediatric phase 1 study and a population pharmacokinetic modeling and simulation approach. Cephalalgia 2021; 41:1065-1074. [PMID: 34000848 DOI: 10.1177/03331024211007789] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Potential fremanezumab doses for pediatric patients were evaluated using pharmacokinetic modeling and simulation. An open-label phase 1 pharmacokinetic and safety study was conducted in pediatric patients with migraine. This study's results together with refinement of the adult population pharmacokinetic model were used to determine fremanezumab dose recommendations for phase 3 pediatric studies. METHODS Initial application of the adult model suggested that a 75 mg dose in pediatric patients would match exposures determined safe and efficacious in adults; thus, in the phase 1 study, 15 patients, aged 6-11 years and weighing 17-45 kg received a single subcutaneous 75 mg fremanezumab dose. The sparse pharmacokinetic data collected were used to refine the adult model and simulate concentration-time profiles for monthly subcutaneous doses (60 to 225 mg) in a virtual pediatric population. RESULTS In the phase 1 pediatric study, the safety profile was similar to that of adults. A two-compartment model with first-order absorption and elimination and body weight effects on clearance and central volume was found to adequately describe the pediatric pharmacokinetic data. CONCLUSIONS Using exposure matching to the effective adult fremanezumab dose (225 mg subcutaneous monthly), modeling and simulations predict recommended dose of 120 mg in pediatric patients weighing < 45 kg.Registration: The phase 1 study of this report is registered at EudraCT with the identifier 2018-000734-35.
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Affiliation(s)
| | | | - Aksana Jones
- Cognigen Corporation, a Simulations Plus company, Buffalo, NY, USA
| | | | | | | | | | | | | | - Pippa Loupe
- Teva Pharmaceutical Industries, West Chester, PA, USA
| | | | - Xiaoping Ning
- Teva Pharmaceutical Industries, West Chester, PA, USA
| | - Micha Levi
- Teva Pharmaceutical Industries, West Chester, PA, USA
| | - Andrew H Ahn
- Teva Pharmaceutical Industries, West Chester, PA, USA
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Abstract
Psoriasis is an inflammatory immune-mediated skin disease that affects both adults and children. Increased understanding of its pathogenesis has led to the development of highly effective therapeutic solutions in the form of biological drugs for adult patients with severe forms of the disease. The unpredictability of the action of adult-approved drugs in pediatric populations limited their usage in these patients for several years. However, this scenario has been changing, particularly in the last decade, increasing our knowledge of the clinical efficacy and safety of these drugs in pediatric populations. The approval/extensions to approvals of several biological agents throughout the year 2020 makes it important to update the topic. Five biological agents (etanercept, adalimumab, ustekinumab, secukinumab, and ixekizumab) have been approved by the European Medicines Agency for the treatment of psoriasis in pediatric populations, and three of them (etanercept, ustekinumab, and ixekizumab) were also approved by the US FDA for the same purpose. In total, 17 clinical trials of several distinct targeted therapies (tumor necrosis factor, interleukin [IL]-17 and IL-23, and phosphodiesterase-4 inhibitors) are ongoing in pediatric patients and will certainly provide crucial data on the subject, which could ultimately improve the armamentarium we have to target psoriasis in this special population.
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Affiliation(s)
- Miguel Nogueira
- Department of Dermatology, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - Amy S Paller
- Feinberg Medical School, Northwestern University, Chicago, IL, USA
| | - Tiago Torres
- Department of Dermatology, Centro Hospitalar Universitário do Porto, Porto, Portugal. .,Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto, Portugal.
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Germovsek E, Cheng M, Giragossian C. Allometric scaling of therapeutic monoclonal antibodies in preclinical and clinical settings. MAbs 2021; 13:1964935. [PMID: 34530672 PMCID: PMC8463036 DOI: 10.1080/19420862.2021.1964935] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/19/2021] [Accepted: 08/03/2021] [Indexed: 02/06/2023] Open
Abstract
Constant technological advancement enabled the production of therapeutic monoclonal antibodies (mAbs) and will continue to contribute to their rapid expansion. Compared to small-molecule drugs, mAbs have favorable characteristics, but also more complex pharmacokinetics (PK), e.g., target-mediated nonlinear elimination and recycling by neonatal Fc-receptor. This review briefly discusses mAb biology, similarities and differences in PK processes across species and within human, and provides a detailed overview of allometric scaling approaches for translating mAb PK from preclinical species to human and extrapolating from adults to children. The approaches described here will remain vital in mAb drug development, although more data are needed, for example, from very young patients and mAbs with nonlinear PK, to allow for more confident conclusions and contribute to further growth of this field. Improving mAb PK predictions will facilitate better planning of (pediatric) clinical studies and enable progression toward the ultimate goal of expediting drug development.
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Affiliation(s)
- Eva Germovsek
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, Germany
| | - Ming Cheng
- Development Biologicals, Drug Metabolism And Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc, Ridgefield, US
| | - Craig Giragossian
- Biotherapeutics Discovery, Boehringer Ingelheim Pharmaceuticals Inc, Ridgefield, US
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Adrovic A, Yildiz M, Haslak F, Koker O, Aliyeva A, Sahin S, Barut K, Kasapcopur O. Tocilizumab therapy in juvenile systemic sclerosis: a retrospective single centre pilot study. Rheumatol Int 2020; 41:121-128. [PMID: 33108799 DOI: 10.1007/s00296-020-04732-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 10/12/2020] [Indexed: 01/11/2023]
Abstract
To evaluate the efficacy and safety of anti-interleukin (IL)-6 receptor antibody tocilizumab (TCZ) as a treatment option of juvenile systemic sclerosis (JSS). Nine JSS patients were assigned to a TCZ, additionally to conventional treatment (steroids, methotrexate, mycophenolate-mofetil). The modified Rodnan skin score (mRSS), carbon-monoxide diffusion capacity (DLCO), thorax high-resolution tomography (HRCT), patient global assessment (PGA) and Juvenile Systemic Sclerosis Severity (J4S) score were used to explore the efficacy of treatment. Nine JSS patients were treated with TCZ with a median treatment duration of 10 (1-21) months. Nine patients (77.8%) had radiologically confirmed improvement on thorax HRCT, 7 (77.8%) had decreased PGA (mean pre-treatment PGA 3.7 vs. 2.3 post-treatment PGA 2), 6 (66.7%) had increased DLCO (mean pre-treatment DLCO 69.14% vs. post-treatment DLCO 79.50%) after the TCZ treatment. In all patients mRSS and the J4S decreased: 26.1 vs. 19.7 and 8.2 vs. 4.7, respectively. Changes in mRSS, DLCO, PGA and J4S were statistically significant: p = 0.012, 0.04, 0.026 and 0.007, respectively. All patients tolerated well TCZ treatment. JSS is a rare condition characterized with skin fibrosis and internal organ involvement. Tocilizumab represents a potential treatment option for patients unresponsive to conventional treatment. Long-term prospective studies with higher number of patients are needed to provide more relevant data.
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Affiliation(s)
- Amra Adrovic
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Mehmet Yildiz
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Fatih Haslak
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Oya Koker
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ayten Aliyeva
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Sezgin Sahin
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Kenan Barut
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ozgur Kasapcopur
- Department of Pediatric Rheumatology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul, Turkey.
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Novel monoclonal antibody to fibrin(ogen) ?C-region for detection of the earliest forms of soluble fibrin. UKRAINIAN BIOCHEMICAL JOURNAL 2020. [DOI: 10.15407/ubj92.03.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Gelbenegger G, Schoergenhofer C, Knoebl P, Jilma B. Bridging the Missing Link with Emicizumab: A Bispecific Antibody for Treatment of Hemophilia A. Thromb Haemost 2020; 120:1357-1370. [PMID: 32717759 PMCID: PMC7649063 DOI: 10.1055/s-0040-1714279] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Hemophilia A, characterized by absent or ineffective coagulation factor VIII (FVIII), is a serious bleeding disorder that entails severe and potentially life-threatening bleeding events. Current standard therapy still involves replacement of FVIII, but is often complicated by the occurrence of neutralizing alloantibodies (inhibitors). Management of patients with inhibitors is challenging and necessitates immune tolerance induction for inhibitor eradication and the use of bypassing agents (activated prothrombin complex concentrates or recombinant activated factor VII), which are expensive and not always effective. Emicizumab is the first humanized bispecific monoclonal therapeutic antibody designed to replace the hemostatic function of activated FVIII by bridging activated factor IX and factor X (FX) to activate FX and allow the coagulation cascade to continue. In the majority of hemophilic patients with and without inhibitors, emicizumab reduced the annualized bleeding rate to almost zero in several clinical trials and demonstrated a good safety profile. However, the concurrent use of emicizumab and activated prothrombin complex concentrate imposes a high risk of thrombotic microangiopathy and thromboembolic events on patients and should be avoided. Yet, the management of breakthrough bleeds and surgery remains challenging with only limited evidence-based recommendations being available. This review summarizes published clinical trials and preliminary reports of emicizumab and discusses the clinical implications of emicizumab in treatment of hemophilia A.
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Affiliation(s)
- Georg Gelbenegger
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | | | - Paul Knoebl
- Division of Hematology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - Bernd Jilma
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
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