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Bergan S, Vethe NT. The potential for therapeutic drug monitoring of belatacept and other biologicals in solid organ transplantation. Br J Clin Pharmacol 2024. [PMID: 39056476 DOI: 10.1111/bcp.16170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 04/22/2024] [Accepted: 06/12/2024] [Indexed: 07/28/2024] Open
Abstract
In solid organ transplantation (SOT), biologicals such as recombinant therapeutic proteins, monoclonal antibodies, fusion proteins and conjugates are increasingly used for immunosuppression, desensitization, ABO (blood group) incompatibility, antibody-mediated rejections and atypical haemolytic uremic syndrome. In this paper, we review the medical evidence available for biologicals used in SOT and the potential for improvement by the application of therapeutic drug monitoring (TDM) and model-informed precision dosing. Biologicals are used for off-label indications within the field of SOT, building on the experience from their use on labelled indications. Dosing is currently mostly standard, and experience vs. effect and toxicity is limited. Pharmacokinetic characteristics of these large, partly also immunogenic molecules differ from those of traditional small molecules. Individualization by concentration measurements and modelling has mostly been proof-of-concept or feasibility studies that lack the power to provide evidence for improvement in clinical outcome. For some drugs such as alemtuzumab, eculizumab, rituximab, tocilizumab and belatacept, studies have demonstrated significant interindividual variability in pharmacokinetics. Variability in absorption from subcutaneous administration may increase interindividual variability. There is also an economic aspect of appropriate dosing that needs to be pursued. Available assays and models to refine interpretation are in place, but trials of adequate size to document the usefulness of TDM and MIPD are scarce. Collaboration within the TDM community seems mandatory to establish studies of sufficient strength to provide evidence for the use of biologicals that are currently used off-label in SOT and furthermore to identify the settings where TDM may be beneficial.
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Affiliation(s)
- Stein Bergan
- Department of Pharmacology, Oslo University Hospital, Oslo, Norway
- Department of Pharmacy, University of Oslo, Oslo, Norway
| | - Nils Tore Vethe
- Department of Pharmacology, Oslo University Hospital, Oslo, Norway
- Department of Pharmacy, University of Oslo, Oslo, Norway
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2
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Jørgensen KK, Høivik ML, Chopra A, Benth JŠ, Ricanek P, Moum PB, Jyssum I, Bolstad N, Warren DJ, Vaage PJT, Munthe PLA, Lundin PKEA, Anisdahl K, Syversen SW, Goll GL, Lund-Johansen F, Medhus AW, Jahnsen PJ. Humoral immune response to SARS-CoV-2 vaccination in patients with inflammatory bowel disease on immunosuppressive medication: association to serum drug levels and disease type. Scand J Gastroenterol 2023; 58:874-882. [PMID: 36788656 DOI: 10.1080/00365521.2023.2177884] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/16/2023]
Abstract
OBJECTIVES Immune responses following SARS-CoV-2 vaccination in patients with inflammatory bowel disease (IBD) are not well characterized. The aims of this study were to explore the serological response associated with IBD, and immunosuppressive medications including serum concentrations of biologics and thiopurine metabolites. MATERIALS AND METHODS This prospective, observational study included adult patients with ulcerative colitis (UC) and Crohn's disease (CD), and healthy controls. Antibodies to the receptor-binding domain of SARS-CoV-2 spike proteins, and serum concentrations of ongoing biologic and immunomodulatory medications were assessed prior to, and 2-5 weeks after the second vaccine dose. Serologic response was defined as anti-Spike antibodies ≥70 AU/ml. RESULTS In 958 IBD patients (380 UC, 578 CD) and 323 healthy controls, the median (Q1; Q3) anti-Spike antibody level (AU/ml) was lower in patients (618 (192; 4370)) compared to controls (3355 (896; 7849)) (p < 0.001). The antibody levels were lower in CD (439 (174; 3304)) compared to UC (1088 (251; 5975)) (p < 0.001). No associations were demonstrated between antibody levels and serum drug concentrations for TNF inhibitor (TNFi), vedolizumab and ustekinumab. Patients receiving TNFi + thiopurines with a subtherapeutic 6-thioguanine nucleotide (6-TGN) level had higher response rate (93%) compared to patients with 6-TGN within the therapeutic range (53%) (p = 0.003). A diagnosis of UC, mRNA-1273 vaccine, and other treatments than TNFi + thiopurines were associated with humoral response. CONCLUSIONS Patients with CD had an attenuated humoral response to SARS-COV-2 vaccination as compared to patients with UC. The lack of association between serum levels of biologics and serologic response indicates vaccination regardless of proximity to drug administration.
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Affiliation(s)
| | - Marte Lie Høivik
- Department of Gastroenterology, Oslo University Hospital, Ullevål, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Adity Chopra
- Department of Immunology, Oslo University Hospital, Oslo, Norway
| | - Jūratė Šaltytė Benth
- Institute of Clinical Medicine, Campus Ahus, University of Oslo, Oslo, Norway
- Health Services Research Unit, Akershus University Hospital, Lørenskog, Norway
| | - Petr Ricanek
- Department of Gastroenterology, Akershus University Hospital, Lørenskog, Norway
| | - Prof Bjørn Moum
- Department of Gastroenterology, Oslo University Hospital, Ullevål, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Ingrid Jyssum
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Oslo, Norway Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Nils Bolstad
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - David John Warren
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Prof John T Vaage
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Immunology, Oslo University Hospital, Oslo, Norway
| | - Prof Ludvig A Munthe
- Department of Immunology, Oslo University Hospital, Oslo, Norway
- KG Jebsen Centre for B cell Malignancies, University of Oslo, Oslo, Norway
| | - Prof Knut E A Lundin
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Gastroenterology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Karoline Anisdahl
- Department of Gastroenterology, Oslo University Hospital, Ullevål, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Silje Watterdal Syversen
- Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Oslo, Norway Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Guro Løvik Goll
- Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Oslo, Norway Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Fridtjof Lund-Johansen
- Department of Immunology, Oslo University Hospital, Oslo, Norway
- ImmunoLingo Convergence Center, University of Oslo, Oslo, Norway
| | - Asle W Medhus
- Department of Gastroenterology, Oslo University Hospital, Ullevål, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Prof Jørgen Jahnsen
- Department of Gastroenterology, Akershus University Hospital, Lørenskog, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
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3
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Bitter H, Warren DJ, Bolstad N, Noraas ALI, Ostensen ME. Transplacental passage of belimumab during pregnancy and follow-up of a child exposed in utero. Ann Rheum Dis 2023; 82:577-579. [PMID: 36604152 DOI: 10.1136/ard-2022-223684] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 12/23/2022] [Indexed: 01/07/2023]
Affiliation(s)
- Helle Bitter
- Department of Rheumatology, Sorlandet Hospital Kristiansand, Kristiansand, Norway
| | - David John Warren
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Nils Bolstad
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
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4
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Truffot A, Jourdil JF, Veyret-Gautier E, Noble J, Jouve T, Malvezzi P, Rostaing L, Stanke-Labesque F. Quantification of belatacept by liquid chromatography-tandem mass spectrometry in human plasma: Application to a pharmacokinetic study in renal transplant recipients. Clin Biochem 2023; 113:17-20. [PMID: 36586569 DOI: 10.1016/j.clinbiochem.2022.12.014] [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: 10/24/2022] [Revised: 12/22/2022] [Accepted: 12/25/2022] [Indexed: 12/29/2022]
Abstract
Therapeutic drug monitoring is the cornerstone of immunosuppressive treatment in transplantation. The immunosuppressive drugs used in kidney transplant patients are mostly comprised of biologics, including therapeutic monoclonal antibodies (mAbs) and fusion proteins. Therefore, a specific and sensitive analytical technique that can universally quantify mAbs, as well as fusion proteins, is essential for clinical pharmacokinetics studies. In this short communication, we describe the validation of a liquid chromatography tandem mass-spectrometry (LC-MS/MS) method for quantification of the fusion protein belatacept in the plasma of kidney-transplant patients. Sample preparation was based on our previously published and implementable electrospray ionization LC-MS/MS method that allows the simultaneous quantification of seven mAbs. Immunocapture was made possible by the Fc domain of belatacept and identification/quantification by the choice of MRM transitions of peptides. The temporal evolution of the belatacept concentration after intravenous infusion and inter-individual variability of trough concentrations were assessed in 17 human plasma samples. The belatacept calibration curves were linear from 1 to 200 mg.L-1 and within-day and between-day accuracy and precision fulfilled Food and Drug Administration validation criteria. Residual belatacept concentrations (n = 8) ranged from 5.1 to 15.0 mg.L-1, with a median of 8.9 mg.L-1 and an inter-individual CV of 33.0%. Our generic LC-MS/MS method allows the quantification of fusion proteins, such as belatacept, and could be used for therapeutic drug monitoring. This method provides a useful tool to study the intra-patient variability of belatacept and the association between belatacept exposure and its therapeutic effects.
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Affiliation(s)
- Aurélie Truffot
- Laboratoire de Virologie, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France.
| | - Jean-François Jourdil
- Laboratoire de Pharmacologie, Pharmacogénétique et Toxicologie, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France; Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, HP2, 38000 Grenoble, France
| | - Elodie Veyret-Gautier
- Laboratoire de Pharmacologie, Pharmacogénétique et Toxicologie, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France; Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, HP2, 38000 Grenoble, France
| | - Johan Noble
- Service de Néphrologie, Hémodialyse, Aphérèses et Transplantation, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France
| | - Thomas Jouve
- Service de Néphrologie, Hémodialyse, Aphérèses et Transplantation, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France
| | - Paolo Malvezzi
- Service de Néphrologie, Hémodialyse, Aphérèses et Transplantation, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France
| | - Lionel Rostaing
- Service de Néphrologie, Hémodialyse, Aphérèses et Transplantation, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France
| | - Françoise Stanke-Labesque
- Laboratoire de Pharmacologie, Pharmacogénétique et Toxicologie, Centre Hospitalier Universitaire Grenoble-Alpes, 38000 Grenoble, France; Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, HP2, 38000 Grenoble, France
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Rani M, Hadia NMA, Shawky AM, Mehmood RF, Hameed S, Zahid S, Iqbal J, Alatawi NS, Ahmed A, Khera RA. Novel A-π-D-π-A type non-fullerene acceptors of dithienyl diketopyrropopyrrole derivatives to enhance organic photovoltaic applications: a DFT study. RSC Adv 2023; 13:1640-1658. [PMID: 36712641 PMCID: PMC9833106 DOI: 10.1039/d2ra07291b] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/16/2022] [Indexed: 01/13/2023] Open
Abstract
To boost the photovoltaic attributes of organic photovoltaic cells, seven dithienyl diketopyrropopyrrole (TDPP) donor-based A-π-D-π-A (acceptor-bridge-donor-bridge-acceptor) type molecules (TM1-TM7) were formulated by modifying the electron accepting ends of the reference molecule (TMR). Optical and quantum chemical parameters of seven synthesized molecules were investigated using density functional theory with the MPW1PW91/6-31G(d,p) functional. Several parameters that can be used to measure and improve the efficiency of solar cells have been analyzed and summed up. These parameters include binding energy of exciton, excitation energy of electron, reorganization energies, dipole moment, molecular electrostatic potential, charge mobility, wavelength of maximum absorption, open circuit voltage, short circuit current, fill factor, density of states, transition density matrices, as well as iso-surface and non-covalent interactions. Thus, all of our proposed structures are perceived to be superior to the reference in terms of the maximum possible solar energy yield in solar cells with bulk heterojunctions, as determined by analyses of our designed molecules for the aforementioned parameters.
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Affiliation(s)
- Mafia Rani
- Department of Chemistry, University of AgricultureFaisalabad 38000Pakistan
| | - N. M. A. Hadia
- Physics Department, College of Science, Jouf UniversityP.O. Box 2014SakakaAl-JoufSaudi Arabia
| | - Ahmed M. Shawky
- Science and Technology Unit (STU), Umm Al-Qura UniversityMakkah 21955Saudi Arabia
| | - Rana Farhat Mehmood
- Department of Chemistry, Division of Science and Technology, University of EducationTownshipLahore 54770Pakista
| | - Shanza Hameed
- Department of Chemistry, University of AgricultureFaisalabad 38000Pakistan
| | - Saba Zahid
- Department of Chemistry, University of AgricultureFaisalabad 38000Pakistan
| | - Javed Iqbal
- Department of Chemistry, University of AgricultureFaisalabad 38000Pakistan,Department of Chemistry, College of Science, University of BahrainSakhir, P. O. Box 32038Bahrain
| | - Naifa S. Alatawi
- Physics Department, Faculty of Science, University of TabukTabuk 71421Saudi Arabia
| | - Asma Ahmed
- Department of Computer Science Faculty of Computer and Information Technology, University of TabukTabukSaudi Arabia
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The development and validation of a high-capacity serological assay for celiac disease. Clin Biochem 2022; 107:13-18. [DOI: 10.1016/j.clinbiochem.2022.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 05/27/2022] [Accepted: 05/30/2022] [Indexed: 11/17/2022]
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de Nattes T, Lebourg L, Etienne I, Laurent C, Lemoine M, Dumont A, Guerrot D, Jacquot S, Candon S, Bertrand D. CD86 occupancy in belatacept-treated kidney transplant patients is not associated with clinical and infectious outcomes. Am J Transplant 2022; 22:1691-1698. [PMID: 35181996 DOI: 10.1111/ajt.17005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 01/25/2023]
Abstract
The CD86 occupancy assay has been developed to measure the number of CD86 molecules unbound to belatacept, but its association with clinical outcomes has not been assessed yet. All kidney transplant patients switched to belatacept in our center between 2016 and 2018 were included. Blood samples were collected before each infusion for 1 year to assess CD86 occupancy by CD86 antibody cytometry staining on the surface of CD14+ monocytes. Results were expressed as the median fluorescence intensity (MFI) value of CD86 staining. At each infusion, the MFIDay of infusion /MFIDay 0 ratio was calculated. Forty-one patients were consecutively included. After every 2-week infusion period, CD86 MFI ratio dropped from 1.00 to 0.73 [0.57-0.98], p = .07. However, this ratio progressively increased to 0.78 [0.53-1.13] at 1 year, which was not statistically different from pre-switch ratio, p = .4. Over the first year, the MFI ratio coefficient of variation was 31.58% [23.75-38.31]. MFI ratio was not different between patients with or without opportunistic infections: 0.73 [0.60-0.88] versus 0.80 [0.71-1.00], p = .2, or between patients with or without EBV DNAemia, p = .2. Despite previous in vitro results, the CD86 occupancy assay suffers from a high intra-individual variability and does not appear to be relevant to clinical outcomes.
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Affiliation(s)
- Tristan de Nattes
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France.,Department of Immunology, and Biotherapies, UNIROUEN, INSERM U1234, Normandy University, Rouen University Hospital, Rouen, France
| | - Ludivine Lebourg
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France
| | - Isabelle Etienne
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France
| | - Charlotte Laurent
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France
| | - Mathilde Lemoine
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France
| | - Audrey Dumont
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France
| | - Dominique Guerrot
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France
| | - Serge Jacquot
- Department of Immunology, and Biotherapies, UNIROUEN, INSERM U1234, Normandy University, Rouen University Hospital, Rouen, France
| | - Sophie Candon
- Department of Immunology, and Biotherapies, UNIROUEN, INSERM U1234, Normandy University, Rouen University Hospital, Rouen, France
| | - Dominique Bertrand
- Nephrology - Kidney Transplant Unit, Rouen University Hospital, Rouen, France
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8
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Gehin JE, Syversen SW, Warren DJ, Goll GL, Sexton J, Bolstad N, Hammer HB. Serum etanercept concentrations in relation to disease activity and treatment response assessed by ultrasound, biomarkers and clinical disease activity scores: results from a prospective observational study of patients with rheumatoid arthritis. RMD Open 2021; 7:rmdopen-2021-001985. [PMID: 34911811 PMCID: PMC8679136 DOI: 10.1136/rmdopen-2021-001985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/16/2021] [Indexed: 12/21/2022] Open
Abstract
Objectives To identify the therapeutic range for etanercept and to assess the incidence of anti-etanercept antibody formation. Methods Associations between etanercept serum concentration and disease activity as well as treatment response were examined in a longitudinal observational study of rheumatoid arthritis patients starting etanercept. Disease activity was assessed by ultrasound (grey scale and power Doppler), 28-joint Disease Activity Score (DAS28), Simplified Disease Activity Index, plasma calprotectin and C reactive protein. Etanercept concentration and anti-etanercept antibodies were analysed using automated in-house fluorescence assays. Results A total of 89 patients were included, whereof 66% were biological disease-modifying antirheumatic drug (DMARD) naïve and 91% used concomitant synthetic DMARD. At 3 months, the median etanercept concentration was 1.8 (IQR 1.1–2.5) mg/L. Longitudinal associations were found between etanercept concentration and disease activity assessed by plasma calprotectin, C reactive protein and DAS28, but not between etanercept concentration and improvement in disease activity by any of the parameters at 3, 6 or 12 months of treatment. Etanercept concentrations were not significantly different among patients who achieved response or remission, compared with non-response or non-remission. Hence, no therapeutic range could be identified. None of the patients developed anti-etanercept antibodies. Conclusion Despite the use of sensitive and objective markers of inflammation, a therapeutic range could not be identified for etanercept. Hence, this study suggests that proactive therapeutic drug monitoring is unlikely to benefit rheumatoid arthritis patients treated with etanercept, but a potential benefit in certain clinical situations cannot be excluded.
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Affiliation(s)
- Johanna Elin Gehin
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway .,Faculty of Medicine, University of Oslo, Oslo, Norway
| | | | - David John Warren
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Guro Løvik Goll
- Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Joseph Sexton
- Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Nils Bolstad
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Hilde Berner Hammer
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
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9
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Azzopardi N, Longuet H, Ternant D, Thibault G, Gouilleux-Gruart V, Lebranchu Y, Büchler M, Gatault P, Paintaud G. Relationship Between Antithymocyte Globulin Concentrations and Lymphocyte Sub-Populations in Kidney Transplant Patients. Clin Pharmacokinet 2021; 61:111-122. [PMID: 34292526 DOI: 10.1007/s40262-021-01053-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/20/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Rabbit antithymocyte globulins (rATGs) are polyclonal antibodies used to prevent acute cellular rejection in kidney transplantation. Their dosing remains largely empirical and the question of an individualized dose is still unresolved. METHODS Data from a prospective study in 17 kidney transplant patients were used to develop a model describing the dose-concentration-response relationship of rATG with T-lymphocyte subpopulation counts over time. The model was validated using an independent cohort of kidney transplant patients treated by rATG in the same center. RESULTS Pharmacokinetics of rATG was described using a two-compartment model integrating a third compartment and a target-mediated elimination for active rATG. The kinetics of CD3+, CD4+, CD8+, and CD3-CD56+ cell counts over time were described by a pharmacokinetic-pharmacodynamic model with transit compartments, integrating both CD3-CD56+-independent and CD3-CD56+-dependent rATG-mediated lymphocyte depletion, and a positive feedback. Elimination of rATG was influenced by age and body surface area, while its distribution was also influenced by body surface area. CD3+ proliferation rate decreased with age and CD3-CD56+-mediated elimination was influenced by the V158F-FCGR3A polymorphism. Binary efficacy and tolerance endpoints were defined as a CD3+ count < 20 mm-3 for at least 7 days and a CD4+ count > 200 mm-3 at 1 year, respectively. Simulations showed that increasing or decreasing the standard 6-mg/kg dose will impact both tolerance and efficacy, while a dose decrease may be beneficial in elderly patients. CONCLUSIONS Our results can be used to design prospective clinical trials testing dose individualization based on patients' characteristics. CLINICAL TRIAL REGISTRATION Eudract No. 2009-012673-35.
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Affiliation(s)
| | - Hélène Longuet
- Department of Nephrology and Clinical Immunology, CHRU de Tours, Tours, France
| | - David Ternant
- University of Tours, EA4245 T2I, Tours, France. .,Department of Medical Pharmacology, CHRU de Tours, 37044, Tours, France.
| | - Gilles Thibault
- University of Tours, EA7501 GICC, Tours, France.,Laboratory of Immunology, CHRU de Tours, Tours, France
| | - Valérie Gouilleux-Gruart
- University of Tours, EA7501 GICC, Tours, France.,Laboratory of Immunology, CHRU de Tours, Tours, France
| | | | - Matthias Büchler
- Department of Nephrology and Clinical Immunology, CHRU de Tours, Tours, France.,University of Tours, EA4245 T2I, Tours, France
| | - Philippe Gatault
- Department of Nephrology and Clinical Immunology, CHRU de Tours, Tours, France.,University of Tours, EA4245 T2I, Tours, France
| | - Gilles Paintaud
- University of Tours, EA4245 T2I, Tours, France.,Department of Medical Pharmacology, CHRU de Tours, 37044, Tours, France
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10
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Zwart TC, Guchelaar HJ, van der Boog PJM, Swen JJ, van Gelder T, de Fijter JW, Moes DJAR. Model-informed precision dosing to optimise immunosuppressive therapy in renal transplantation. Drug Discov Today 2021; 26:2527-2546. [PMID: 34119665 DOI: 10.1016/j.drudis.2021.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/21/2021] [Accepted: 06/04/2021] [Indexed: 12/18/2022]
Abstract
Immunosuppressive therapy is pivotal for sustained allograft and patient survival after renal transplantation. However, optimally balanced immunosuppressive therapy is challenged by between-patient and within-patient pharmacokinetic (PK) variability. This could warrant the application of personalised dosing strategies to optimise individual patient outcomes. Pharmacometrics, the science that investigates the xenobiotic-biotic interplay using computer-aided mathematical modelling, provides options to describe and quantify this PK variability and enables identification of patient characteristics affecting immunosuppressant PK and treatment outcomes. Here, we review and critically appraise the available pharmacometric model-informed dosing solutions for the typical immunosuppressants in modern renal transplantation, to guide their initial and subsequent dosing.
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Affiliation(s)
- Tom C Zwart
- Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, the Netherlands
| | - Henk-Jan Guchelaar
- Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, the Netherlands; Leiden Network for Personalised Therapeutics, Leiden, the Netherlands
| | - Paul J M van der Boog
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, Leiden, the Netherlands; LUMC Transplant Center, Leiden University Medical Center, Leiden, the Netherlands
| | - Jesse J Swen
- Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, the Netherlands; Leiden Network for Personalised Therapeutics, Leiden, the Netherlands
| | - Teun van Gelder
- Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, the Netherlands
| | - Johan W de Fijter
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, Leiden, the Netherlands; LUMC Transplant Center, Leiden University Medical Center, Leiden, the Netherlands
| | - Dirk Jan A R Moes
- Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, the Netherlands; Leiden Network for Personalised Therapeutics, Leiden, the Netherlands.
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11
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Gehin JE, Warren DJ, Syversen SW, Lie E, Sexton J, Loli L, Wierød A, Bjøro T, Kvien TK, Bolstad N, Goll GL. Serum golimumab concentration and anti-drug antibodies are associated with treatment response and drug survival in patients with inflammatory joint diseases: data from the NOR-DMARD study. Scand J Rheumatol 2021; 50:445-454. [PMID: 33650469 DOI: 10.1080/03009742.2021.1875040] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Objectives: This study aimed to identify the therapeutic target concentration and frequency of anti-drug antibodies (ADAbs) in golimumab-treated patients with inflammatory joint disease (IJD).Method: Associations between golimumab concentration, ADAbs, and treatment response were examined in 91 patients with IJD [41 axial spondyloarthritis (axSpA), 20 rheumatoid arthritis (RA), and 30 psoriatic arthritis (PsA)] included in the NOR-DMARD study. Treatment response was defined by Ankylosing Spondylitis Disease Activity Score (ASDAS) clinically important improvement in axSpA, European League Against Rheumatism (EULAR) good/moderate response in RA, and improvement of ≥ 50% in modified Disease Activity index for PSoriatic Arthritis (DAPSA) (28 swollen/tender joint counts) in PsA. Serum drug concentrations and ADAbs were analysed using automated in-house assays.Results: At inclusion, 42% were biological disease-modifying anti-rheumatic drug naïve and 42% used concomitant synthetic disease-modifying anti-rheumatic drug. The median golimumab concentration was 2.2 (interquartile range 1.0-3.5) mg/L. The proportions of responders after 3 months among patients with golimumab concentration < 1.0, 1.0-3.9, and ≥ 4.0 mg/L were 19%, 49%, and 74%, respectively. A higher rate of treatment discontinuation was seen in patients with serum golimumab concentration < 1.0 compared to ≥ 1.0 mg/L (hazard ratio 3.3, 95% confidence interval 1.8-6.0, p < 0.05). ADAbs were detected in 6%, and were associated with lower drug concentrations and both reduced treatment response and drug survival.Conclusions: Golimumab concentrations ≥ 1.0 mg/L were associated with improved treatment response and better drug survival, although some patients may benefit from higher concentrations. This study suggests a rationale for dosing guided by therapeutic drug monitoring in golimumab-treated patients with IJD. The results should be confirmed in larger studies including trough samples, and the efficacy of such a strategy must be examined in randomized controlled trials.
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Affiliation(s)
- J E Gehin
- Department of Medical Biochemistry, Oslo University Hospital-Radiumhospitalet, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - D J Warren
- Department of Medical Biochemistry, Oslo University Hospital-Radiumhospitalet, Oslo, Norway
| | - S W Syversen
- Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - E Lie
- Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway.,Department of Cardiology, Oslo University Hospital-Ullevål, Oslo, Norway
| | - J Sexton
- Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - L Loli
- Department of Rheumatology, Lillehammer Hospital for Rheumatic Diseases, Lillehammer, Norway
| | - A Wierød
- Department of Rheumatology, Vestre Viken Hospital Trust, Drammen, Norway
| | - T Bjøro
- Department of Medical Biochemistry, Oslo University Hospital-Radiumhospitalet, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - T K Kvien
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - N Bolstad
- Department of Medical Biochemistry, Oslo University Hospital-Radiumhospitalet, Oslo, Norway
| | - G L Goll
- Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
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Abstract
Costimulation between T cells and antigen-presenting cells is essential for the regulation of an effective alloimmune response and is not targeted with the conventional immunosuppressive therapy after kidney transplantation. Costimulation blockade therapy with biologicals allows precise targeting of the immune response but without non-immune adverse events. Multiple costimulation blockade approaches have been developed that inhibit the alloimmune response in kidney transplant recipients with varying degrees of success. Belatacept, an immunosuppressive drug that selectively targets the CD28-CD80/CD86 pathway, is the only costimulation blockade therapy that is currently approved for kidney transplant recipients. In the last decade, belatacept therapy has been shown to be a promising therapy in subgroups of kidney transplant recipients; however, the widespread use of belatacept has been tempered by an increased risk of acute kidney transplant rejection. The purpose of this review is to provide an overview of the costimulation blockade therapies that are currently in use or being developed for kidney transplant indications.
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