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Keating PE, Hock BD, Chin PKL, O'Donnell JL, Barclay ML. Evaluation of the Homogenous Mobility Shift Assay for Infliximab and Adalimumab Anti-drug Antibody Detection in the Clinical Laboratory. Ther Drug Monit 2024; 46:619-626. [PMID: 38648648 DOI: 10.1097/ftd.0000000000001200] [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: 08/02/2023] [Accepted: 02/08/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Detecting antidrug antibodies (ADAs) against infliximab or adalimumab is useful for therapeutic drug monitoring. Various ADA detection methods exist, and antibody titer is an output in some algorithms. Homogenous mobility shift assay (HMSA) measures relative ADA concentration and determines drug-ADA complex size in vitro. However, the relevance of complex size determination in drug monitoring remains unclear. Hence, the association between complex size, ADA concentration, and sample detectable neutralizing activity was evaluated. METHODS Sera from infliximab-treated and adalimumab-treated patients who tested positive for ADA in the National Screening Service were analyzed using 3 ADA assays. HMSA determined the relative ADA concentrations and complex sizes, competitive ligand-binding assay evaluated the sample neutralizing capacity, and enzyme-linked immunosorbent assay detected immunoglobulin (Ig)G4 ADA. RESULTS Most ADA-positive samples (>80%) formed drug-ADA dimer complexes, whereas 17% had dimer and multimer complexes, and 3% had multimeric complexes. Multimer presence had 100% positive predictive value for detectable neutralizing activity. ADA concentration and detectable neutralizing activity were moderately correlated (r = 0.65) in adalimumab-treated patients and strongly correlated (r = 0.81) in infliximab-treated patients. In adalimumab-treated patients, multimer presence was a stronger predictor of neutralizing activity than ADA concentration was, but not in infliximab-treated patients. However, in infliximab-treated patient samples, multimer presence revealed a distinct subset with high ADA concentrations, neutralizing activity, and IgG4 ADA. CONCLUSIONS Multimers detected using HMSA had a strong positive predictive value for competitive ligand-binding assay detectable neutralizing activity. Multimeric IgG4-containing ADA-drug complexes revealed a distinct subset of infliximab-treated patient samples, whose clinical relevance merits further investigation.
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Affiliation(s)
| | - Barry D Hock
- Department of Hematology, University of Otago, Christchurch, New Zealand
| | - Paul K L Chin
- Department of Medicine, University of Otago, Christchurch, New Zealand ; and
- Department of Clinical Pharmacology, Christchurch Hospital, Christchurch, New Zealand
| | | | - Murray Lindsay Barclay
- Department of Medicine, University of Otago, Christchurch, New Zealand ; and
- Department of Clinical Pharmacology, Christchurch Hospital, Christchurch, New Zealand
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Brun MK, Gehin JE, Bjørlykke KH, Warren DJ, Klaasen RA, Sexton J, Sandanger Ø, Kvien TK, Mørk C, Jahnsen J, Bolstad N, Jørgensen KK, Haavardsholm EA, Goll GL, Syversen SW. Clinical consequences of infliximab immunogenicity and the effect of proactive therapeutic drug monitoring: exploratory analyses of the randomised, controlled NOR-DRUM trials. THE LANCET. RHEUMATOLOGY 2024; 6:e226-e236. [PMID: 38402891 DOI: 10.1016/s2665-9913(23)00341-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 12/15/2023] [Accepted: 12/21/2023] [Indexed: 02/27/2024]
Abstract
BACKGROUND Antidrug antibodies to TNF inhibitors might affect clinical outcomes. Proactive therapeutic drug monitoring allows for early detection of antidrug antibodies and might reduce negative clinical consequences. We aimed to explore how antidrug antibodies to the TNF inhibitor infliximab influence treatment outcomes, and to assess the effect of proactive therapeutic drug monitoring. METHODS This was a predefined exploratory analysis of data from the randomised, controlled NOR-DRUM trials. The trials were conducted in rheumatology, gastroenterology, and dermatology departments at 21 Norwegian hospitals. Adult patients (aged 18-75 years) with immune-mediated inflammatory diseases were randomly assigned to proactive therapeutic drug monitoring or standard infliximab dosing in the NOR-DRUM A trial (30-week follow-up) and the NOR-DRUM B trial (52-week follow-up). Antidrug antibodies were assessed with a drug-sensitive assay before each infusion. The outcomes of remission (at week 30), disease worsening (during 52 weeks), infusion reactions, and infliximab discontinuation were assessed according to the presence of antidrug antibodies and use of therapeutic drug monitoring. FINDINGS Between March 1, 2017, and Dec 12, 2019, 616 patients were included in the NOR-DRUM trials, of whom 615 had at least one serum infliximab and antidrug antibody assessment and were included in the present analyses. Mean age was 45 years (IQR 32-56), 305 (50%) patients were women, and 310 (50%) patients were men. Antidrug antibodies were detected in 147 (24%) patients. Remission at week 30 occurred in 25 (35%) of 72 patients with antidrug antibodies and 180 (54%) of 335 without antidrug antibodies (risk ratio 0·62 [95% CI 0·45-0·86]; p=0·0037). In patients with antidrug antibodies compared with patients without antidrug antibodies, higher rates were found for: disease worsening over 52 weeks (0·76 per person-year vs 0· 35 per person-year, hazard ratio [HR] 2·02 [95% CI 1·33-3·07]; p=0·0009), infusion reactions (0·16 per person-year vs 0·03 per person-year, HR 17·02 [6·98-41·47]; p<0·0001), and infliximab discontinuation (1·00 per person-year vs 0·20 per person-year, HR 6·64 [4·84-9·11]; p<0·0001). These associations were more pronounced in patients with high concentrations of antidrug antibodies than in those with low concentrations of antidrug antibodies. Independent of antibody status, therapeutic drug monitoring was associated with a lower risk of disease worsening (HR 0·41 [0·29-0·59]; p=0·0001) or an infusion reaction (HR 0·30 [0·12-0·73]; p=0·0076), and was associated with an increase in the rate of infliximab discontinuation (HR 1·37 [1·02-1·83]; p=0·037). INTERPRETATION In patients where antidrug antibodies were detected, remission was less likely to be reached and sustained, and infusion reaction or discontinuation of infliximab was more likely. Timely detection of antidrug antibodies by proactive therapeutic drug monitoring facilitated treatment decisions that reduced the negative consequences, both regarding infliximab effectiveness and safety. This highlights the role of proactive therapeutic drug monitoring in optimising infliximab therapy. FUNDING Inter-regional KLINBEFORSK grants and South-Eastern Norway Regional Health Authority grants.
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Affiliation(s)
- Marthe Kirkesæther Brun
- Center for Treatment of Rheumatic and Musculoskeletal Diseases, Diakonhjemmet Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
| | - Johanna E Gehin
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Kristin Hammersbøen Bjørlykke
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Gastroenterology, Akershus University Hospital, Lørenskog, Norway
| | - David John Warren
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Rolf A Klaasen
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Joseph Sexton
- Center for Treatment of Rheumatic and Musculoskeletal Diseases, Diakonhjemmet Hospital, Oslo, Norway
| | | | - Tore K Kvien
- Center for Treatment of Rheumatic and Musculoskeletal Diseases, Diakonhjemmet Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Cato Mørk
- Akershus Dermatology Center, Lørenskog, Norway
| | - Jørgen Jahnsen
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Gastroenterology, Akershus University Hospital, Lørenskog, Norway
| | - Nils Bolstad
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | | | - Espen A Haavardsholm
- Center for Treatment of Rheumatic and Musculoskeletal Diseases, Diakonhjemmet Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Guro Løvik Goll
- Center for Treatment of Rheumatic and Musculoskeletal Diseases, Diakonhjemmet Hospital, Oslo, Norway; Institute of Health and Society, University of Oslo, Oslo, Norway
| | - Silje Watterdal Syversen
- Center for Treatment of Rheumatic and Musculoskeletal Diseases, Diakonhjemmet Hospital, Oslo, Norway; Institute of Health and Society, University of Oslo, Oslo, Norway
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Berkhout LC, I'Ami MJ, Kruithof S, Vogelzang EH, Hooijberg F, Hart MHL, Bentlage AEH, Thomas D, Vermeire S, Vidarsson G, Ten Brinke A, Nurmohamed MT, Wolbink GJ, Rispens T. Formation and clearance of TNF-TNF inhibitor complexes during TNF inhibitor treatment. Br J Pharmacol 2024; 181:1165-1181. [PMID: 37859583 DOI: 10.1111/bph.16269] [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: 02/25/2023] [Revised: 06/29/2023] [Accepted: 07/31/2023] [Indexed: 10/21/2023] Open
Abstract
BACKGROUND AND PURPOSE Millions of patients with inflammatory diseases are treated with tumour necrosis factor (TNF) inhibitors (TNFi). Individual treatment response varies, in part related to variable drug clearance. The role of TNF-TNFi complexes in clearance of the different TNFi is controversial. Moreover, mechanistic insight into the structural aspects and biological significance of TNF-TNFi complexes is lacking. We hypothesized a role for Fc-mediated clearance of TNF-TNFi immune complexes. Therefore, we investigated circulating TNF-TNFi complexes upon treatment with certolizumab-lacking Fc tails-in comparison with adalimumab, golimumab, infliximab and etanercept. EXPERIMENTAL APPROACH Drug-tolerant ELISAs were developed and used to quantify TNF during adalimumab, golimumab, etanercept, certolizumab and infliximab treatment in patients with inflammatory arthritis or ulcerative colitis for a maximum follow-up of 1 year. Effects on in vitro TNF production and Fc-mediated uptake of TNF-TNFi complexes were investigated for all five TNFi. KEY RESULTS Circulating TNF concentrations were >20-fold higher during certolizumab treatment compared with adalimumab, reaching up to 23.1 ng·ml-1 . Internalization of TNF-TNFi complexes by macrophages depended on Fc valency, with efficient uptake for the full antibody TNFi (three Fc tails), but little or no uptake for etanercept and certolizumab (one and zero Fc tail, respectively). TNF production was not affected by TNFi. Total TNF load did not affect clearance rate of total TNFi. CONCLUSIONS AND IMPLICATIONS Differences in TNFi structure profoundly affect clearance of TNF, while it is unlikely that TNF itself significantly contributes to target-mediated drug disposition of TNFi.
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Affiliation(s)
- Lea Catharina Berkhout
- Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Merel Jeanne I'Ami
- Amsterdam Rheumatology and Immunology Center | Reade, Amsterdam, The Netherlands
| | - Simone Kruithof
- Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Erik Hans Vogelzang
- Amsterdam Rheumatology and Immunology Center | Reade, Amsterdam, The Netherlands
| | - Femke Hooijberg
- Amsterdam Rheumatology and Immunology Center | Reade, Amsterdam, The Netherlands
| | - Margaretha Hendrika Louise Hart
- Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Arthur Ebel Herman Bentlage
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
- Department of Experimental Immunohematology, Sanquin Research, Amsterdam, The Netherlands
| | - Debby Thomas
- Department of Pharmaceutical and Pharmacological Sciences, Laboratory for Therapeutic and Diagnostic Antibodies, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Severine Vermeire
- Department of Gastroenterology and Hepatology, University Hospitals Leuven, KU Leuven, Leuven, Belgium
- Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), Translational Research Center for Gastrointestinal Disorders (TARGID), KU Leuven, Leuven, Belgium
- Translational Research in Gastrointestinal Disorders, University Hospitals Leuven, Leuven, Belgium
| | - Gestur Vidarsson
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
- Department of Experimental Immunohematology, Sanquin Research, Amsterdam, The Netherlands
| | - Anja Ten Brinke
- Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Michael Twahier Nurmohamed
- Amsterdam Rheumatology and Immunology Center | Reade, Amsterdam, The Netherlands
- Amsterdam Rheumatology and Immunology Center | VU University Medical Center, Amsterdam, The Netherlands
| | - Gerrit Jan Wolbink
- Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
- Amsterdam Rheumatology and Immunology Center | Reade, Amsterdam, The Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands
- Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
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Spreafico A, Couselo EM, Irmisch A, Bessa J, Au-Yeung G, Bechter O, Svane IM, Sanmamed MF, Gambardella V, McKean M, Callahan M, Dummer R, Klein C, Umaña P, Justies N, Heil F, Fahrni L, Opolka-Hoffmann E, Waldhauer I, Bleul C, Staack RF, Karanikas V, Fowler S. Phase 1, first-in-human study of TYRP1-TCB (RO7293583), a novel TYRP1-targeting CD3 T-cell engager, in metastatic melanoma: active drug monitoring to assess the impact of immune response on drug exposure. Front Oncol 2024; 14:1346502. [PMID: 38577337 PMCID: PMC10991832 DOI: 10.3389/fonc.2024.1346502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 03/05/2024] [Indexed: 04/06/2024] Open
Abstract
Introduction Although checkpoint inhibitors (CPIs) have improved outcomes for patients with metastatic melanoma, those progressing on CPIs have limited therapeutic options. To address this unmet need and overcome CPI resistance mechanisms, novel immunotherapies, such as T-cell engaging agents, are being developed. The use of these agents has sometimes been limited by the immune response mounted against them in the form of anti-drug antibodies (ADAs), which is challenging to predict preclinically and can lead to neutralization of the drug and loss of efficacy. Methods TYRP1-TCB (RO7293583; RG6232) is a T-cell engaging bispecific (TCB) antibody that targets tyrosinase-related protein 1 (TYRP1), which is expressed in many melanomas, thereby directing T cells to kill TYRP1-expressing tumor cells. Preclinical studies show TYRP1-TCB to have potent anti-tumor activity. This first-in-human (FIH) phase 1 dose-escalation study characterized the safety, tolerability, maximum tolerated dose/optimal biological dose, and pharmacokinetics (PK) of TYRP1-TCB in patients with metastatic melanoma (NCT04551352). Results Twenty participants with cutaneous, uveal, or mucosal TYRP1-positive melanoma received TYRP1-TCB in escalating doses (0.045 to 0.4 mg). All participants experienced ≥1 treatment-related adverse event (TRAE); two participants experienced grade 3 TRAEs. The most common toxicities were grade 1-2 cytokine release syndrome (CRS) and rash. Fractionated dosing mitigated CRS and was associated with lower levels of interleukin-6 and tumor necrosis factor-alpha. Measurement of active drug (dual TYPR1- and CD3-binding) PK rapidly identified loss of active drug exposure in all participants treated with 0.4 mg in a flat dosing schedule for ≥3 cycles. Loss of exposure was associated with development of ADAs towards both the TYRP1 and CD3 domains. A total drug PK assay, measuring free and ADA-bound forms, demonstrated that TYRP1-TCB-ADA immune complexes were present in participant samples, but showed no drug activity in vitro. Discussion This study provides important insights into how the use of active drug PK assays, coupled with mechanistic follow-up, can inform and enable ongoing benefit/risk assessment for individuals participating in FIH dose-escalation trials. Translational studies that lead to a better understanding of the underlying biology of cognate T- and B-cell interactions, ultimately resulting in ADA development to novel biotherapeutics, are needed.
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Affiliation(s)
- Anna Spreafico
- Department of Medicine, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network and University of Toronto, Toronto, ON, Canada
| | - Eva Muñoz Couselo
- Department of Medical Oncology, Vall d’Hebron University Hospital and Vall d’Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | - Anja Irmisch
- Roche Pharma Research & Early Development, Roche Innovation Center Zurich, Zurich, Switzerland
| | - Juliana Bessa
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, Basel, Switzerland
| | - George Au-Yeung
- Department of Medical Oncology, Peter MacCallum Cancer Center and Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia
| | - Oliver Bechter
- Department of General Medical Oncology, Universitair Ziekenhuis (UZ), Leuven, Leuven, Belgium
| | - Inge Marie Svane
- National Center for Cancer Immune Therapy and Department of Oncology, Copenhagen University Hospital, Herlev, Denmark
| | - Miguel F. Sanmamed
- Department of Medical Oncology, Clínica Universidad de Navarra and Immunology and Immunotherapy Program, Center for Applied Medical Research (CIMA), Pamplona, Spain
- Centro de Investigación Biomédica en Red Cáncer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - Valentina Gambardella
- Centro de Investigación Biomédica en Red Cáncer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
- Department of Medical Oncology, Hospital Clínico Universitario de Valencia, INCLIVA Biomedical Research Institute, University of Valencia, Valencia, Spain
| | - Meredith McKean
- Sarah Cannon Research Institute at Tennessee Oncology, Nashville, TN, United States
| | - Margaret Callahan
- Department of Medicine, Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York, NY, United States
| | - Reinhard Dummer
- Department of Dermatology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Christian Klein
- Roche Pharma Research & Early Development, Roche Innovation Center Zurich, Zurich, Switzerland
| | - Pablo Umaña
- Roche Pharma Research & Early Development, Roche Innovation Center Zurich, Zurich, Switzerland
| | - Nicole Justies
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, Basel, Switzerland
| | - Florian Heil
- Roche Pharma Research & Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Linda Fahrni
- Roche Pharma Research & Early Development, Roche Innovation Center Zurich, Zurich, Switzerland
| | - Eugenia Opolka-Hoffmann
- Roche Pharma Research & Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Inja Waldhauer
- Roche Pharma Research & Early Development, Roche Innovation Center Zurich, Zurich, Switzerland
| | - Conrad Bleul
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, Basel, Switzerland
| | - Roland F. Staack
- Roche Pharma Research & Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Vaios Karanikas
- Roche Pharma Research & Early Development, Roche Innovation Center Zurich, Zurich, Switzerland
| | - Stephen Fowler
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, Basel, Switzerland
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Opolka-Hoffmann E, Edelmann MR, Otteneder MB, Hauri S, Jordan G, Schrag P, Lechmann M, Winter G, Staack RF. Biodistribution of Drug/ADA Complexes: The Impact of Immune Complex Formation on Antibody Distribution. AAPS J 2024; 26:33. [PMID: 38478197 DOI: 10.1208/s12248-024-00899-6] [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: 12/08/2023] [Accepted: 02/10/2024] [Indexed: 04/11/2024] Open
Abstract
The clinical use of therapeutic monoclonal antibodies (mAbs) for the treatment of cancer, inflammation, and other indications has been successfully established. A critical aspect of drug-antibody pharmacokinetics is immunogenicity, which triggers an immune response via an anti-drug antibody (ADA) and forms drug/ADA immune complexes (ICs). As a consequence, there may be a reduced efficacy upon neutralization by ADA or an accelerated drug clearance. It is therefore important to understand immunogenicity in biological therapies. A drug-like immunoglobulin G (IgG) was radiolabeled with tritium, and ICs were formed using polyclonal ADA, directed against the complementary-determining region of the drug-IgG, to investigate in vivo biodistribution in rodents. It was demonstrated that 65% of the radioactive IC dose was excreted within the first 24 h, compared with only 6% in the control group who received non-complexed 3H-drug. Autoradiographic imaging at the early time point indicated a deposition of immune complexes in the liver, lung, and spleen indicated by an increased radioactivity signal. A biodistribution study confirmed the results and revealed further insights regarding excretion and plasma profiles. It is assumed that the immune complexes are readily taken up by the reticuloendothelial system. The ICs are degraded proteolytically, and the released radioactively labeled amino acids are redistributed throughout the body. These are mainly renally excreted as indicated by urine measurements or incorporated into protein synthesis. These biodistribution studies using tritium-labeled immune complexes described in this article underline the importance of understanding the immunogenicity induced by therapeutic proteins and the resulting influence on biological behavior.
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Affiliation(s)
- Eugenia Opolka-Hoffmann
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Roche Diagnostics GmbH, Nonnenwald 2, DE-82377, Penzberg, Germany.
| | - Martin R Edelmann
- Department of Pharmacy and Pharmacology, University of Bath, Bath, BA2 7AY, UK
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Therapeutic Modalities, CH-4070, Basel, Switzerland
| | - Michael B Otteneder
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, CH-4070, Basel, Switzerland
| | - Simon Hauri
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, CH-4070, Basel, Switzerland
| | - Gregor Jordan
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Roche Diagnostics GmbH, Nonnenwald 2, DE-82377, Penzberg, Germany
| | - Peter Schrag
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, CH-4070, Basel, Switzerland
| | - Martin Lechmann
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Roche Diagnostics GmbH, Nonnenwald 2, DE-82377, Penzberg, Germany
| | - Gerhard Winter
- Department of Pharmacy, Pharmaceutical Technology & Biopharmaceutics, Ludwig-Maximilians University, DE-80539, Munich, Germany
| | - Roland F Staack
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Roche Diagnostics GmbH, Nonnenwald 2, DE-82377, Penzberg, Germany
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Djukić T, Drvenica I, Kovačić M, Minić R, Vučetić D, Majerič D, Šefik-Bukilica M, Savić O, Bugarski B, Ilić V. Dynamic light scattering analysis of immune complexes in sera of rheumatoid arthritis patients. Anal Biochem 2023:115194. [PMID: 37279816 DOI: 10.1016/j.ab.2023.115194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/25/2023] [Accepted: 05/22/2023] [Indexed: 06/08/2023]
Abstract
The size of circulating immune complexes (CICs) in rheumatoid arthritis (RA) could be an emerging criterion in disease diagnosis. This study analyzed size and electrokinetic potential of CICs from RA patients, healthy young adults, and RA patients age-matched controls aiming to establish their unique CIC features. Pooled CIC of 30 RA patients, 30 young adults, and 30 RA group's age-matched controls (middle-aged and oldеr healthy adults), and in vitro IgG aggregates from pooled sera of 300 healthy volunteers were tested using dynamic light scattering (DLS). Size distribution of CIC in healthy young adults exhibited high polydispersity. RA CIC patients and their age-matched control showed distinctly narrower size distributions compared with young adults. In these groups, particles clustered around two well-defined peaks. Particles of peak 1 were 36.1 ± 6.8 nm in RA age-matched control, and 30.8 ± 4.2 nm in RA patients. Particles of peak 2 of the RA age-matched control's CIC was 251.7 ± 41.2 nm, while RA CIC contained larger particles (359.9 ± 50.5 nm). The lower zeta potential of RA CIC, compared to control, indicated a disease-related decrease in colloidal stability. DLS identified RA-specific, but also age-specific distribution of CIC size and opened possibility of becoming a method for CIC size analysis in IC-mediated diseases.
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Affiliation(s)
- Tamara Djukić
- Innovation Center of the Faculty of Technology and Metallurgy Ltd, Belgrade, Serbia
| | - Ivana Drvenica
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia.
| | - Marijana Kovačić
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia
| | - Rajna Minić
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia
| | - Dušan Vučetić
- Institute for Transfusiology and Haemobiology, Military Medical Academy, Belgrade, Serbia; Faculty of Medicine of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Dragana Majerič
- School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Mirjana Šefik-Bukilica
- Institute for Rheumatology, Belgrade, Serbia; Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Olivera Savić
- Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Branko Bugarski
- Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | - Vesna Ilić
- Institute for Medical Research, University of Belgrade, National Institute of Republic of Serbia, Belgrade, Serbia
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7
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Gehin JE, Goll GL, Brun MK, Jani M, Bolstad N, Syversen SW. Assessing Immunogenicity of Biologic Drugs in Inflammatory Joint Diseases: Progress Towards Personalized Medicine. BioDrugs 2022; 36:731-748. [PMID: 36315391 PMCID: PMC9649489 DOI: 10.1007/s40259-022-00559-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2022] [Indexed: 11/30/2022]
Abstract
Biologic drugs have greatly improved treatment outcomes of inflammatory joint diseases, but a substantial proportion of patients either do not respond to treatment or lose response over time. Drug immunogenicity, manifested as the formation of anti-drug antibodies (ADAb), constitute a significant clinical problem. Anti-drug antibodies influence the pharmacokinetics of the drug, are associated with reduced clinical efficacy, and an increased risk of adverse events such as infusion reactions. The prevalence of ADAb differs among drugs and diseases, and the detection of ADAb also depends on the assay format. Most data exist for the tumor necrosis factor-alpha inhibitors infliximab and adalimumab, with a frequency of ADAb that ranges from 10 to 60% across studies. Measurement of ADAb and serum drug concentrations, therapeutic drug monitoring, has been suggested as a strategy to optimize therapy with biologic drugs. Although the recent randomized clinical Norwegian Drug Monitoring (NOR-DRUM) trials show promise towards a personalized medicine prescribing approach by therapeutic drug monitoring, several challenges remain. A plethora of assay formats, with widely differing properties, is currently used for measuring ADAb. Comparing results between different assays and laboratories is difficult, which complicates the development of cut-offs necessary for guidelines and the implementation of ADAb measurements in clinical practice. With the possible exception of infliximab, limited data on clinical relevance and cost effectiveness exist to support therapeutic drug monitoring as a routine clinical strategy to monitor biologic drugs in inflammatory joint diseases. The aim of this review is to provide an overview of the characteristics and prevalence of ADAb, predisposing factors to ADAb formation, commonly used assessment methods, clinical consequences of ADAb, and the potential implications of ADAb assessments for everyday treatment of inflammatory joint diseases.
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Affiliation(s)
- Johanna Elin Gehin
- Department of Medical Biochemistry, Oslo University Hospital, Radiumhospitalet, Nydalen, Box 4953, 0424, Oslo, Norway.
| | - Guro Løvik Goll
- Center for Treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital, Oslo, Norway
| | - Marthe Kirkesæther Brun
- Center for Treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital, Oslo, Norway
- Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Meghna Jani
- Centre for Epidemiology Versus Arthritis, Centre for Musculoskeletal Research, University of Manchester, Manchester, UK
- Department of Rheumatology, Salford Royal NHS Foundation Trust, Salford, UK
| | - Nils Bolstad
- Department of Medical Biochemistry, Oslo University Hospital, Radiumhospitalet, Nydalen, Box 4953, 0424, Oslo, Norway
| | - Silje Watterdal Syversen
- Center for Treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital, Oslo, Norway
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8
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Subtyping anti-infliximab antibodies by the homogenous mobility shift assay (HMSA): potential utility in a pharmacokinetic case study. Pathology 2022; 55:587-590. [PMID: 36400595 DOI: 10.1016/j.pathol.2022.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/01/2022] [Accepted: 08/18/2022] [Indexed: 11/07/2022]
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9
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Pre-Clinical In-Vitro Studies on Parameters Governing Immune Complex Formation. Pharmaceutics 2022; 14:pharmaceutics14061254. [PMID: 35745826 PMCID: PMC9227392 DOI: 10.3390/pharmaceutics14061254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 02/06/2023] Open
Abstract
The success of biotherapeutics is often challenged by the undesirable events of immunogenicity in patients, characterized by the formation of anti-drug antibodies (ADA). Under specific conditions, the ADAs recognizing the biotherapeutic can trigger the formation of immune complexes (ICs), followed by cascades of subsequent effects on various cell types. Hereby, the connection between the characteristics of ICs and their downstream impact is still not well understood. Factors governing the formation of ICs and the characteristics of these IC species were assessed systematically in vitro. Classic analytical methodologies such as SEC-MALS and SV-AUC, and the state-of-the-art technology mass photometry were applied for the characterization. The study demonstrates a clear interplay between (1) the absolute concentration of the involved components, (2) their molar ratios, (3) structural features of the biologic, (4) and of its endogenous target. This surrogate study design and the associated analytical tool-box is readily applicable to most biotherapeutics and provides valuable insights into mechanisms of IC formation prior to FIH studies. The applicability is versatile—from the detection of candidates with immunogenicity risks during developability assessment to evaluation of the impact of degraded or post-translationally modified biotherapeutics on the formation of ICs.
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10
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Lotz GP, Benstein K, Bloem K, Buddiger H, Calonder C, Elm S, Fernandez E, Goodman J, Gorovits B, Grudzinska-Goebel J, Janssen M, Jawa V, Kramer D, Luo L, Malisauskas M, Michaut L, Schäfer M, Spindeldreher S, Ullmann M, Nana Weldingh K, Kromminga A, Snoeck V. When to Extend Monitoring of Anti-drug Antibodies for High-risk Biotherapeutics in Clinical Trials: an Opinion from the European Immunogenicity Platform. AAPS J 2022; 24:68. [PMID: 35554731 DOI: 10.1208/s12248-022-00712-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 04/14/2022] [Indexed: 11/30/2022] Open
Abstract
The determination of a tailored anti-drug antibody (ADA) testing strategy is based on the immunogenicity risk assessment to allow a correlation of ADAs with changes to pharmacokinetics, efficacy, and safety. The clinical impact of ADA formation refines the immunogenicity risk assessment and defines appropriate risk mitigation strategies. Health agencies request for high-risk biotherapeutics to extend ADA monitoring for patients that developed an ADA response to the drug until ADAs return to baseline levels. However, there is no common understanding in which cases an extension of ADA follow-up sampling beyond the end of study (EOS) defined in the clinical study protocol is required. Here, the Immunogenicity Strategy Working Group of the European Immunogenicity Platform (EIP) provides recommendations on requirements for an extension of ADA follow-up sampling in clinical studies where there is a high risk of serious consequences from ADAs. The importance of ADA evaluation during a treatment-free period is recognized but the decision whether to extend ADA monitoring at a predefined EOS should be based on evaluation of ADA data in the context of corresponding clinical signals. If the clinical data set shows that safety consequences are minor, mitigated, or resolved, further ADA monitoring may not be required despite potentially detectable ADAs above baseline. Extended ADA monitoring should be centered on individual patient benefit.
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Affiliation(s)
- Gregor P Lotz
- Roche Pharma Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany.
| | - Karin Benstein
- Sanofi-Aventis Deutschland GmbH, Industriepark Hoechst, Frankfurt am Main, Germany
| | - Karien Bloem
- Biologics Lab, Sanquin Diagnostic Services, Amsterdam, The Netherlands
| | - Harm Buddiger
- Genmab B.V., Uppsalalaan 15, Utrecht, The Netherlands
| | | | | | - Elena Fernandez
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, Basel, Switzerland
| | - Joanne Goodman
- Integrated Bioanalysis, Clinical Pharmacology and Safety Sciences, AstraZeneca, BioPharmaceuticals R&D, Cambridge, UK
| | | | | | | | - Vibha Jawa
- Bristol Myers Squibb, Biotherapeutics and Bioanalysis Non-Clinical Development, Princeton, New Jersey, USA
| | - Daniel Kramer
- Sanofi-Aventis Deutschland GmbH, Industriepark Hoechst, Frankfurt am Main, Germany
| | - Linlin Luo
- Regulated BA, Merck & Co., Inc., Kenilworth, New Jersey, USA
| | | | | | - Martin Schäfer
- Roche Pharma Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | | | | | | | - Arno Kromminga
- Kromminga Consulting, Hamburg, Germany.,Institute for Immunology, Kiel, Germany
| | - Veerle Snoeck
- UCB Biopharma SRL, Translational Biomarkers and Bioanalysis, Braine-l'Alleud, Belgium
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11
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Kantasiripitak W, Wang Z, Spriet I, Ferrante M, Dreesen E. Recent advancements in clearance monitoring of monoclonal antibodies in patients with inflammatory bowel diseases. Expert Rev Clin Pharmacol 2022; 14:1455-1466. [PMID: 35034509 DOI: 10.1080/17512433.2021.2028619] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Less than 50% of patients with inflammatory bowel diseases (IBD) receiving monoclonal antibody (mAb) therapy achieve endoscopic remission. Poor outcomes may indicate a need for dose optimization. During therapeutic drug monitoring (TDM), drug concentrations are measured, and when found too low, dosage regimen escalations are performed. To date, benefits of TDM of mAbs in patients with IBD are uncertain. AREAS COVERED This review presents an overview of what clearance monitoring is, how it can be performed, and why and when it may be valuable in treating patients with IBD. Virtual patients were used for illustration. A literature search was performed to summarize current evidence for clearance monitoring in IBD and other disease settings. EXPERT OPINION During clearance monitoring, mAb clearance is calculated and monitored over time. Higher mAb clearance in patients with IBD has been associated with higher target load (target-mediated drug disposition), protein-losing enteropathy (fecal drug loss), and immunogenicity. Although not prospectively confirmed, clearance monitoring might facilitate identification of (yet) asymptomatic disease flares or presence of (yet) undetectable anti-drug antibodies. Furthermore, clearance monitoring may be used to predict treatment outcomes. Whether dosage regimen adjustments can modify the clearance time course and the treatment outcome is to be determined.
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Affiliation(s)
- Wannee Kantasiripitak
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Zhigang Wang
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Isabel Spriet
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium.,Department of Pharmacy, University Hospitals Leuven, Leuven, Belgium
| | - Marc Ferrante
- Department of Gastroenterology and Hepatology, University Hospitals Leuven, Leuven, Belgium.,Department of Chronic Diseases and Metabolism, University of Leuven, Leuven, Belgium
| | - Erwin Dreesen
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
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12
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Opolka-Hoffmann E, Jordan G, Otteneder M, Kieferle R, Lechmann M, Winter G, Staack RF. The impact of immunogenicity on therapeutic antibody pharmacokinetics: A preclinical evaluation of the effect of immune complex formation and antibody effector function on clearance. MAbs 2021; 13:1995929. [PMID: 34763611 PMCID: PMC8726625 DOI: 10.1080/19420862.2021.1995929] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The occurrence of an immune response against therapeutic proteins poses a major risk for the development of biologics and for successful treatment of patients. Generation of anti-drug antibodies (ADAs) can lead to formation of immune complexes (ICs), consisting of drug and ADAs, with potential impact on safety, efficacy and exposure. Here, we focus on the effects of IC formation, i.e., specific IC sizes, ADA and drug properties, on drug pharmacokinetics. Pre-formed IC preparations of an IgG1 drug (with wild type or with an ablated effector function at the Fc domain) and different ADA surrogates (directed against the complementarity-determining regions or Fc domain of the drug) were administered to rats and collected serum was analyzed to determine the total drug concentration. A combination of size-exclusion chromatography and ELISA enabled a size-specific evaluation of IC profiles in serum and their changes over time. Within five minutes, total drug concentration decreased by ~20–60% when the drug was complexed. Independent of the ADA surrogate and drug variant used, increasing IC size led to increased clearance. Comparing ICs formed with the same ADA surrogate but different IgG1 variants, we observed that complexed drug with a wildtype Fc domain showed faster clearance compared to immune effector function modified drug. Data generated in this study indicated that clearance of drug due to ADA generation is driven by size and structure of the formed ICs, but also by the immune effector functions of the Fc domains of IgGs. Abbreviations Ab: antibody, ADA: anti-drug antibody, AUC: area under the curve, Bi: biotin, CDR: complementary-determining region, cmax: maximal concentration, Dig: digoxigenin, ELISA: enzyme-linked immunosorbent assay, Fc: fragment crystallizable, FcRn: neonatal Fc receptor, HMW: high molecular weight, IC: immune complex, IC-QC: immune complex quality control, IgG: immunoglobulin G, mAb: monoclonal antibody, mADA: monoclonal ADA, pAb: polyclonal antibody, pADA: polyclonal ADA, PD: pharmacodynamics; PK: pharmacokinetic, QC: quality control, SEC: size-exclusion chromatography, WT: wildtype
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Affiliation(s)
- Eugenia Opolka-Hoffmann
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Gregor Jordan
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Michael Otteneder
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, Basel, Switzerland
| | - Robin Kieferle
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Martin Lechmann
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Gerhard Winter
- Department of Pharmacy, Pharmaceutical Technology & Biopharmaceutics, Ludwig-Maximilians-University, Munich, Germany
| | - Roland F Staack
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
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13
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Großerichter-Wagener C, Kos D, van Leeuwen A, Dijk L, Jeremiasse J, Loeff FC, Rispens T. Biased anti-idiotype response in rabbits leads to high-affinity monoclonal antibodies to biologics. MAbs 2021; 12:1814661. [PMID: 32887534 PMCID: PMC7531530 DOI: 10.1080/19420862.2020.1814661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Antibody formation to human(ized) therapeutic antibodies in humans is highly skewed toward anti-idiotype responses, probably because the idiotype is the only 'foreign' part of the antibody molecule. Here, we analyzed antibody responses to F(ab')2 fragments of a panel of 17 human(ized) therapeutic antibodies in rabbits. Homology between the rabbit germline and the human(ized) antibodies is moderate not only for the variable domains (both the complementarity-determining regions and the framework regions), but also for the constant domains (66% or less). Nevertheless, we observed a highly skewed anti-idiotype response in all cases, with up to >90% of the antibodies directed toward the idiotype. These results indicate that the idiotype may be inherently immunodominant. We used these biased responses to raise monoclonal rabbit anti-idiotype antibodies against secukinumab, ustekinumab, reslizumab, mepolizumab, palivizumab, and dupilumab and demonstrate the potential to develop sensitive pharmacokinetic assays with these antibodies.
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Affiliation(s)
- Christina Großerichter-Wagener
- Department of Immunopathology, Sanquin Research, Amsterdam, the Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam , Amsterdam, The Netherlands
| | - Dorien Kos
- Sanquin Reagents B.V ., Amsterdam, The Netherlands
| | - Astrid van Leeuwen
- Biologics Laboratory, Sanquin Diagnostic Services , Amsterdam, The Netherlands
| | - Lisanne Dijk
- Department of Immunopathology, Sanquin Research, Amsterdam, the Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam , Amsterdam, The Netherlands
| | - Jorn Jeremiasse
- Department of Immunopathology, Sanquin Research, Amsterdam, the Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam , Amsterdam, The Netherlands
| | - Floris C Loeff
- Department of Immunopathology, Sanquin Research, Amsterdam, the Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam , Amsterdam, The Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research, Amsterdam, the Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam , Amsterdam, The Netherlands
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14
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2020 White Paper on Recent Issues in Bioanalysis: Vaccine Assay Validation, qPCR Assay Validation, QC for CAR-T Flow Cytometry, NAb Assay Harmonization and ELISpot Validation ( Part 3 - Recommendations on Immunogenicity Assay Strategies, NAb Assays, Biosimilars and FDA/EMA Immunogenicity Guidance/Guideline, Gene & Cell Therapy and Vaccine Assays). Bioanalysis 2021; 13:415-463. [PMID: 33533276 DOI: 10.4155/bio-2021-0007] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The 14th edition of the Workshop on Recent Issues in Bioanalysis (14th WRIB) was held virtually on June 15-29, 2020 with an attendance of over 1000 representatives from pharmaceutical/biopharmaceutical companies, biotechnology companies, contract research organizations, and regulatory agencies worldwide. The 14th WRIB included three Main Workshops, seven Specialized Workshops that together spanned 11 days in order to allow exhaustive and thorough coverage of all major issues in bioanalysis, biomarkers, immunogenicity, gene therapy and vaccine. Moreover, a comprehensive vaccine assays track; an enhanced cytometry track and updated Industry/Regulators consensus on BMV of biotherapeutics by LCMS were special features in 2020. As in previous years, this year's WRIB continued to gather a wide diversity of international industry opinion leaders and regulatory authority experts working on both small and large molecules to facilitate sharing and discussions focused on improving quality, increasing regulatory compliance and achieving scientific excellence on bioanalytical issues. This 2020 White Paper encompasses recommendations emerging from the extensive discussions held during the workshop and is aimed to provide the Global Bioanalytical Community with key information and practical solutions on topics and issues addressed, in an effort to enable advances in scientific excellence, improved quality and better regulatory compliance. Due to its length, the 2020 edition of this comprehensive White Paper has been divided into three parts for editorial reasons. This publication (Part 3) covers the recommendations on Vaccine, Gene/Cell Therapy, NAb Harmonization and Immunogenicity). Part 1 (Innovation in Small Molecules, Hybrid LBA/LCMS & Regulated Bioanalysis), Part 2A (BAV, PK LBA, Flow Cytometry Validation and Cytometry Innovation) and Part 2B (Regulatory Input) are published in volume 13 of Bioanalysis, issues 4 and 5 (2020), respectively.
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15
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Strand V, Goncalves J, Isaacs JD. Immunogenicity of biologic agents in rheumatology. Nat Rev Rheumatol 2020; 17:81-97. [PMID: 33318665 DOI: 10.1038/s41584-020-00540-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2020] [Indexed: 12/12/2022]
Abstract
Biologic agents have become a core component of therapeutic strategies for many inflammatory rheumatic diseases. However, perhaps reflecting the specificity and generally high affinity of biologic agents, these therapeutics have been used by rheumatologists with less consideration of their pharmacokinetics than that of conventional synthetic DMARDs. Immunogenicity was recognized as a potential limitation to the use of biologic agents at an early stage in their development, although regulatory guidance was relatively limited and assays to measure immunogenicity were less sophisticated than today. The advent of biosimilars has sparked a renewed interest in immunogenicity that has resulted in the development of increasingly sensitive assays, an enhanced appreciation of the pharmacokinetic consequences of immunogenicity and the development of comprehensive and specific guidance from regulatory authorities. As a result, rheumatologists have a greatly improved understanding of the field in general, including the factors responsible for immunogenicity, its potential clinical consequences and the implications for everyday treatment. In some specialties, immunogenicity testing is becoming a part of routine clinical management, but definitive evidence of its cost-effectiveness in rheumatology is awaited.
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Affiliation(s)
- Vibeke Strand
- Division of Immunology and Rheumatology, Stanford University, Palo Alto, CA, USA.
| | - Joao Goncalves
- Research Institute for Medicines (iMed), Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
| | - John D Isaacs
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK.,Musculoskeletal Unit, Newcastle upon Tyne Hospitals NHS Trust, Newcastle upon Tyne, UK
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16
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Coddens A, Snoeck V, Bontinck L, Buyse MA, Pine SO. An innovative method for characterizing neutralizing antibodies against antibody-derived therapeutics. J Immunol Methods 2020; 487:112896. [PMID: 33065122 DOI: 10.1016/j.jim.2020.112896] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/31/2020] [Accepted: 10/06/2020] [Indexed: 10/23/2022]
Abstract
Detection of anti-drug antibodies (ADA) that have a neutralizing capacity is an important aspect of immunogenicity evaluation during development of biotherapeutics, but developing and validating neutralizing antibody (NAb) assays that show direct interference of a biologic function is a challenging and resource-intensive activity. In particular, the need for adequate drug and target tolerance often requires extensive pre-treatment steps that limit assay sensitivity compared with a typical bridging-format assay used to detect binding ADA. Such limitations may complicate data interpretation as a positive ADA followed by a negative NAb result could be due to the presence of non-neutralizing antibodies or could be a false-negative for NAbs due to methodology differences. To address such issues, we developed a novel assay for Nanobodies® and other antibody-derived therapeutics that solely detects ADA directed against the complementarity-determining regions (CDRs) involved in drug-target interactions. This was achieved by creating a "null variant" of the therapeutic drug, which has mutated CDRs rendering it non-functional for target binding but is otherwise identical to the drug compound. Non-CDR-binding antibodies are pre-complexed with the null variant of the Nanobody leaving only CDR-binding ADA with neutralizing potential (ANP) to be detected in this assay, which is called a NAb Epitope Characterization Assay (NECA). Method qualification results confirmed highly comparable assay characteristics (sensitivity, drug tolerance, selectivity and precision) of both the NECA and a validated ADA assay for the same Nanobody. A panel of purified neutralizing and non-neutralizing antibodies as well as non-clinical and clinical samples were used to further substantiate the fit-for-purpose and advantages of this novel assay format to detect ANP. In the clinical case study, a 20 to 40-fold difference in assay sensitivity existed between the validated ADA assay and NAb assay, which complicated data interpretation. Implementation of the NECA allowed unambiguous comparison of the levels of binding ADA and ANP in study samples which enabled us to delineate the true neutralizing capacity of the responses. Depending on the risk of the therapeutic, this method could be a valuable alternative for NAb testing by enabling earlier detection of ADA with neutralizing potential and ensuring adequate immunogenicity risk assessment.
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Affiliation(s)
- Annelies Coddens
- Work performed at Ablynx NV, currently affiliated with argenx BV, Belgium
| | - Veerle Snoeck
- Work performed at Ablynx NV, currently affiliated with UCB Biopharma SRL, Belgium
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17
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Vaisman-Mentesh A, Gutierrez-Gonzalez M, DeKosky BJ, Wine Y. The Molecular Mechanisms That Underlie the Immune Biology of Anti-drug Antibody Formation Following Treatment With Monoclonal Antibodies. Front Immunol 2020; 11:1951. [PMID: 33013848 PMCID: PMC7461797 DOI: 10.3389/fimmu.2020.01951] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 07/20/2020] [Indexed: 12/25/2022] Open
Abstract
Monoclonal antibodies (mAbs) are a crucial asset for human health and modern medicine, however, the repeated administration of mAbs can be highly immunogenic. Drug immunogenicity manifests in the generation of anti-drug antibodies (ADAs), and some mAbs show immunogenicity in up to 70% of patients. ADAs can alter a drug's pharmacokinetic and pharmacodynamic properties, reducing drug efficacy. In more severe cases, ADAs can neutralize the drug's therapeutic effects or cause severe adverse events to the patient. While some contributing factors to ADA formation are known, the molecular mechanisms of how therapeutic mAbs elicit ADAs are not completely clear. Accurate ADA detection is necessary to provide clinicians with sufficient information for patient monitoring and clinical intervention. However, ADA assays present unique challenges because both the analyte and antigen are antibodies, so most assays are cumbersome, costly, time consuming, and lack standardization. This review will discuss aspects related to ADA formation following mAb drug administration. First, we will provide an overview of the prevalence of ADA formation and the available diagnostic tools for their detection. Next, we will review studies that support possible molecular mechanisms causing the formation of ADA. Finally, we will summarize recent approaches used to decrease the propensity of mAbs to induce ADAs.
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Affiliation(s)
- Anna Vaisman-Mentesh
- George S. Wise Faculty of Life Sciences, School of Molecular Cell Biology and Biotechnology, Tel Aviv University, Tel Aviv, Israel
| | | | - Brandon J. DeKosky
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, KS, United States
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, KS, United States
| | - Yariv Wine
- George S. Wise Faculty of Life Sciences, School of Molecular Cell Biology and Biotechnology, Tel Aviv University, Tel Aviv, Israel
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18
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Matucci A, Nencini F, Vivarelli E, Bormioli S, Maggi E, Vultaggio A. Immunogenicity-unwanted immune responses to biological drugs - can we predict them? Expert Rev Clin Pharmacol 2020; 14:47-53. [PMID: 32432941 DOI: 10.1080/17512433.2020.1772053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Biological agents (BAs) target molecules involved in disease mechanisms and have modified the natural history of several immune-mediated disorders. All BAs are immunogenic, resulting in the formation of antidrug antibodies (ADAs), which can neutralize drug activity leading to loss of response and potential relapse, or serious adverse events such as infusion hypersensitivity reactions. The production of ADAs is the result of a specific adaptive immune response in which T and B cells are involved. AREAS COVERED Factors conditioning the immunogenicity of BAs, including drug-, treatment- and patient-related factors are currently the subject of many studies. Among them, a lot of attention is dedicated to define the impact of BAs structure, the effect of targeting (soluble or membrane) molecules, the impact of interruption of therapy as well as the role of genetic (HLA and non-HLA) predisposing factors and disease activity. EXPERT OPINION Knowledge of factors capable of influencing the immunogenicity of BAs may help to understand, in a predictive manner and at the single patient level, the presence of risk factors influencing the production of ADAs and their impact on clinical outcomes.
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Affiliation(s)
- Andrea Matucci
- Immunoallergology Unit, University Hospital Careggi , Florence, Italy
| | - Francesca Nencini
- Immunoallergology Unit, University Hospital Careggi , Florence, Italy
| | | | - Susanna Bormioli
- Immunoallergology Unit, University Hospital Careggi , Florence, Italy
| | - Enrico Maggi
- Translational Unit, Immunology Area, Pediatric Hospital Bambino Gesù, IRCCS , Rome, Italy
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19
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Keating PE, Duncan R, Spellerberg M, O'Donnell J, Hock BD. Measurement of anti-natalizumab antibodies by homogeneous mobility shift assay. Pathology 2020; 52:373-374. [PMID: 32113675 DOI: 10.1016/j.pathol.2020.01.682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 01/16/2020] [Accepted: 01/23/2020] [Indexed: 11/25/2022]
Affiliation(s)
- Paula E Keating
- Immunology Section, Canterbury Health Laboratories, Christchurch, New Zealand.
| | - Roderick Duncan
- Department of Neurology, University of Otago, Christchurch, New Zealand
| | - Myfanwy Spellerberg
- Immunology Section, Canterbury Health Laboratories, Christchurch, New Zealand
| | - John O'Donnell
- Immunology Section, Canterbury Health Laboratories, Christchurch, New Zealand
| | - Barry D Hock
- Haematology Research Group, Christchurch Hospital, New Zealand
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20
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Atiqi S, Hooijberg F, Loeff FC, Rispens T, Wolbink GJ. Immunogenicity of TNF-Inhibitors. Front Immunol 2020; 11:312. [PMID: 32174918 PMCID: PMC7055461 DOI: 10.3389/fimmu.2020.00312] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 02/07/2020] [Indexed: 01/19/2023] Open
Abstract
Tumor necrosis factor inhibitors (TNFi) have significantly improved treatment outcome of rheumatic diseases since their incorporation into treatment protocols two decades ago. Nevertheless, a substantial fraction of patients experiences either primary or secondary failure to TNFi due to ineffectiveness of the drug or adverse reactions. Secondary failure and adverse events can be related to the development of anti-drug antibodies (ADA). The earliest studies that reported ADA toward TNFi mainly used drug-sensitive assays. Retrospectively, we recognize this has led to an underestimation of the amount of ADA produced due to drug interference. Drug-tolerant ADA assays also detect ADA in the presence of drug, which has contributed to the currently reported higher incidence of ADA development. Comprehension and awareness of the assay format used for ADA detection is thus essential to interpret ADA measurements correctly. In addition, a concurrent drug level measurement is informative as it may provide insight in the extent of underestimation of ADA levels and improves understanding the clinical consequences of ADA formation. The clinical effects are dependent on the ratio between the amount of drug that is neutralized by ADA and the amount of unbound drug. Pharmacokinetic modeling might be useful in this context. The ADA response generally gives rise to high affinity IgG antibodies, but this response will differ between patients. Some patients will not reach the phase of affinity maturation while others generate an enduring high titer high affinity IgG response. This response can be transient in some patients, indicating a mechanism of tolerance induction or B-cell anergy. In this review several different aspects of the ADA response toward TNFi will be discussed. It will highlight the ADA assays, characteristics and regulation of the ADA response, impact of immunogenicity on the pharmacokinetics of TNFi, clinical implications of ADA formation, and possible mitigation strategies.
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Affiliation(s)
- Sadaf Atiqi
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology, Reade, Amsterdam, Netherlands
| | - Femke Hooijberg
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology, Reade, Amsterdam, Netherlands
| | - Floris C Loeff
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory Academic Medical Centre, Amsterdam, Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory Academic Medical Centre, Amsterdam, Netherlands
| | - Gerrit J Wolbink
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology, Reade, Amsterdam, Netherlands.,Department of Immunopathology, Sanquin Research and Landsteiner Laboratory Academic Medical Centre, Amsterdam, Netherlands
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21
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Berkhout LC, l'Ami MJ, Ruwaard J, Hart MH, Heer POD, Bloem K, Nurmohamed MT, van Vollenhoven RF, Boers M, Alvarez DF, Smith CH, Wolbink GJ, Rispens T. Dynamics of circulating TNF during adalimumab treatment using a drug-tolerant TNF assay. Sci Transl Med 2020; 11:11/477/eaat3356. [PMID: 30700574 DOI: 10.1126/scitranslmed.aat3356] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 09/08/2018] [Accepted: 12/19/2018] [Indexed: 12/24/2022]
Abstract
Patients with rheumatoid arthritis (RA) can be successfully treated with tumor necrosis factor (TNF) inhibitors, including the monoclonal antibody adalimumab. Once in remission, a proportion of patients can successfully discontinue treatment, indicating that blocking TNF is no longer required for disease control. To explore the dynamics of circulating TNF during adalimumab treatment, we developed a competition enzyme-linked immunosorbent assay that can quantify TNF in the presence of large amounts of TNF inhibitor, i.e., a "drug-tolerant" assay. In 193 consecutive adalimumab-treated patients with RA, we demonstrated that circulating TNF increased in average of >50-fold upon treatment and reached a stable concentration in time for most patients. A similar increase in TNF was found in 30 healthy volunteers after one dose of adalimumab. This implies that TNF in circulation during anti-TNF treatment is not primarily associated with disease activity. During treatment, TNF was in complex with adalimumab and could be recovered as inactive 3:1 adalimumab-TNF complexes. No quantitative association was found between TNF and adalimumab concentrations. Low TNF concentrations at week 4 were associated with a higher frequency of antidrug antibodies (ADAs) at subsequent time points, less frequent methotrexate use at baseline, and less frequent remission after 52 weeks. Also in healthy volunteers, early low TNF concentrations are associated with ADAs. In conclusion, longitudinal TNF concentrations are mostly stable during adalimumab treatment and may therefore not predict successful treatment discontinuation. However, early low TNF is strongly associated with ADA formation and may be used as timely predictor of nonresponse toward adalimumab treatment.
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Affiliation(s)
- Lea C Berkhout
- Department of Immunopathology, Sanquin Research, 1066 CX Amsterdam, Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Merel J l'Ami
- Amsterdam Rheumatology and immunology Center, Reade, 1056 AB Amsterdam, Netherlands
| | - Jill Ruwaard
- Amsterdam Rheumatology and immunology Center, Reade, 1056 AB Amsterdam, Netherlands
| | - Margreet H Hart
- Department of Immunopathology, Sanquin Research, 1066 CX Amsterdam, Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Pleuni Ooijevaar-de Heer
- Department of Immunopathology, Sanquin Research, 1066 CX Amsterdam, Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Karien Bloem
- Department of Immunopathology, Sanquin Research, 1066 CX Amsterdam, Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Michael T Nurmohamed
- Amsterdam Rheumatology and immunology Center, Reade, 1056 AB Amsterdam, Netherlands.,Amsterdam Rheumatology and Immunology Center, Amsterdam UMC, VU University Medical Center, 1081 HV Amsterdam, Netherlands
| | - Ronald F van Vollenhoven
- Amsterdam Rheumatology and immunology Center, Reade, 1056 AB Amsterdam, Netherlands.,Amsterdam Rheumatology and Immunology Center, Amsterdam UMC, VU University Medical Center, 1081 HV Amsterdam, Netherlands.,Amsterdam Rheumatology and Immunology Center, Amsterdam UMC, Academic Medical Center, 1105 AZ Amsterdam, Netherlands
| | - Maarten Boers
- Amsterdam Rheumatology and Immunology Center, Amsterdam UMC, VU University Medical Center, 1081 HV Amsterdam, Netherlands.,Department of Epidemiology and Biostatistics, VU University Medical Center, 1081 HV Amsterdam, Netherlands
| | | | - Catherine H Smith
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Kings College London, SE1 9RT London, UK
| | - Gerrit J Wolbink
- Department of Immunopathology, Sanquin Research, 1066 CX Amsterdam, Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands.,Amsterdam Rheumatology and immunology Center, Reade, 1056 AB Amsterdam, Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research, 1066 CX Amsterdam, Netherlands, and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands.
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22
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Perry M, Abdullah A, Frleta M, MacDonald J, McGucken A. The potential value of blood monitoring of biologic drugs used in the treatment of rheumatoid arthritis. Ther Adv Musculoskelet Dis 2020; 12:1759720X20904850. [PMID: 32095163 PMCID: PMC7011331 DOI: 10.1177/1759720x20904850] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 12/30/2019] [Indexed: 12/21/2022] Open
Abstract
The advent of biological therapies has been a major therapeutic advance in rheumatology. Many patients now enjoy improved quality of life through better disease control. The number of therapies continues to grow both within drug class (including biosimilar drugs) and via new mechanisms. For the first time, nonbiological drugs such as small-molecule inhibitors (Janus kinase inhibitors) have shown clinical equivalence. However, clinical unmet need remains with up to a third of patients commenced on a biologic therapy having minimal or no response: (a) Generally, the first biologic used secures the best response, with likelihood of remission falling thereafter with successive therapies; (b) the success of strategy trials using biological therapies can be difficult to replicate in clinical practice due to a combination of patient factors and service limitations. Accordingly, ensuring optimization of initial treatment is an important consideration before switching to alternatives. Therapeutic drug monitoring (TDM) is the measurement of serum levels of a biologic drug with the aim of improving patient care. It is usually combined with detection of any antidrug antibodies that could neutralize the effect of the therapy. This technology has the potential to be a form of 'personalized medicine' by individualizing therapy, in particular, dosing and likelihood of sustained treatment response. It requires a clear relationship between drug dose, blood concentration and therapeutic effect. This paper will outline the technology behind TDM and unpack what we can learn from our colleagues in gastroenterology, where the adoption of TDM is at a more advanced stage than in rheumatology. It will explore and set out a number of clinical scenarios where rheumatologists might find TDM helpful in day-to-day practice. Finally, an outline is given of international developments, including regulatory body appraisals and guideline development.
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Affiliation(s)
- Martin Perry
- Department Rheumatology, Royal Alexandra
Hospital, 9 Corsebar Road, Paisley Renfrewshire PA2 9PN, UK
| | - Azhar Abdullah
- Department Rheumatology, Royal Alexandra
Hospital, Paisley, UK
| | - Marina Frleta
- Department Rheumatology, Royal Alexandra
Hospital, Paisley, UK
| | - Jonathan MacDonald
- Department Gastroenterology, Queen Elizabeth
University Hospital, Glasgow, UK
| | - Andrew McGucken
- Department Rheumatology, Royal Alexandra
Hospital, Paisley, UK
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23
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Malik PRV, Edginton AN. Physiologically-Based Pharmacokinetic Modeling vs. Allometric Scaling for the Prediction of Infliximab Pharmacokinetics in Pediatric Patients. CPT-PHARMACOMETRICS & SYSTEMS PHARMACOLOGY 2019; 8:835-844. [PMID: 31343836 PMCID: PMC6875711 DOI: 10.1002/psp4.12456] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 06/06/2019] [Accepted: 06/17/2019] [Indexed: 12/17/2022]
Abstract
The comparative performances of physiologically‐based pharmacokinetic (PBPK) modeling and allometric scaling for predicting the pharmacokinetics (PKs) of large molecules in pediatrics are unknown. Therefore, both methods were evaluated for accuracy in translating knowledge of infliximab PKs from adults to children. PBPK modeling was performed using the base model for large molecules in PK‐Sim version 7.4 with modifications in Mobi. Eight population PK models from literature were reconstructed and scaled by allometry to pediatrics. Evaluation data included seven pediatric studies (~4–18 years). Both methods performed comparably with 66.7% and 68.6% of model‐predicted concentrations falling within twofold of the observed concentrations for PBPK modeling and allometry, respectively. Considerable variability was noted among the allometric models. Therefore, pediatric clinical trial planning would benefit from using approaches that require predictions depending on the specific question i.e., PBPK modeling and allometry.
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Affiliation(s)
- Paul R V Malik
- School of Pharmacy, University of Waterloo, Kitchener, Ontario, Canada
| | - Andrea N Edginton
- School of Pharmacy, University of Waterloo, Kitchener, Ontario, Canada
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24
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Murdaca G, Negrini S, Greco M, Schiavi C, Giusti F, Borro M, Puppo F. Immunogenicity of infliximab and adalimumab. Expert Opin Drug Saf 2019; 18:343-345. [PMID: 30938213 DOI: 10.1080/14740338.2019.1602117] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Giuseppe Murdaca
- a Clinical Immunology Unit, Department of Internal Medicine , University of Genoa and Ospedale Policlinico San Martino , Genoa , Italy
| | - Simone Negrini
- a Clinical Immunology Unit, Department of Internal Medicine , University of Genoa and Ospedale Policlinico San Martino , Genoa , Italy
| | - Monica Greco
- a Clinical Immunology Unit, Department of Internal Medicine , University of Genoa and Ospedale Policlinico San Martino , Genoa , Italy
| | - Chiara Schiavi
- a Clinical Immunology Unit, Department of Internal Medicine , University of Genoa and Ospedale Policlinico San Martino , Genoa , Italy
| | - Francesca Giusti
- a Clinical Immunology Unit, Department of Internal Medicine , University of Genoa and Ospedale Policlinico San Martino , Genoa , Italy
| | - Matteo Borro
- a Clinical Immunology Unit, Department of Internal Medicine , University of Genoa and Ospedale Policlinico San Martino , Genoa , Italy
| | - Francesco Puppo
- a Clinical Immunology Unit, Department of Internal Medicine , University of Genoa and Ospedale Policlinico San Martino , Genoa , Italy
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