101
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Booth BJ, Ramakrishnan B, Narayan K, Wollacott AM, Babcock GJ, Shriver Z, Viswanathan K. Extending human IgG half-life using structure-guided design. MAbs 2018; 10:1098-1110. [PMID: 29947573 PMCID: PMC6204840 DOI: 10.1080/19420862.2018.1490119] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Engineering of antibodies for improved pharmacokinetics through enhanced binding to the neonatal Fc receptor (FcRn) has been demonstrated in transgenic mice, non-human primates and humans. Traditionally, such approaches have largely relied on random mutagenesis and display formats, which fail to address related critical attributes of the antibody, such as effector functions or biophysical stability. We have developed a structure- and network-based framework to interrogate the engagement of IgG with multiple Fc receptors (FcRn, C1q, TRIM21, FcγRI, FcγRIIa/b, FcγRIIIa) simultaneously. Using this framework, we identified features that govern Fc-FcRn interactions and identified multiple distinct pathways for enhancing FcRn binding in a pH-specific manner. Network analysis provided a novel lens to study the allosteric impact of half-life-enhancing Fc mutations on FcγR engagement, which occurs distal to the FcRn binding site. Applying these principles, we engineered a panel of unique Fc variants that enhance FcRn binding while maintaining robust biophysical properties and wild type-like binding to activating receptors. An antibody harboring representative Fc designs demonstrates a half-life improvement of > 9 fold in transgenic mice and > 3.5 fold in cynomolgus monkeys, and maintains robust effector functions such as antibody-dependent cell-mediated cytotoxicity and complement-dependent cytotoxicity.
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102
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Zhao P, Wang Y, Wu A, Rao Y, Huang Y. Roles of Albumin-Binding Proteins in Cancer Progression and Biomimetic Targeted Drug Delivery. Chembiochem 2018; 19:1796-1805. [PMID: 29920893 DOI: 10.1002/cbic.201800201] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Indexed: 12/18/2022]
Abstract
Nutrient transporters have attracted significant attention for their promising application in biomimetic delivery. Due to the active consumption of nutrients, cancer cells generally overexpress nutrient transporters to meet their increased need for energy and materials. For example, albumin-binding proteins (ABPs) are highly overexpressed in malignant cells, stromal cells, and tumor vessel endothelial cells responsible for albumin uptake. ABP (e.g., SPARC) is a promising target for tumor-specific drug delivery, and albumin has been widely used as a biomimetic delivery carrier. Apart from the transportation function, ABPs are closely associated with neoplasia, invasion, and metastasis. Herein, a summary of the roles of ABP in cancer progression and the application of albumin-based biomimetic tumor-targeted delivery through the ABP pathway is presented.
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Affiliation(s)
- Pengfei Zhao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Shanghai, 201203, P.R. China.,Zhejiang Academy of Medical Science, 182 Tianmushan Road, Hangzhou, 310013, P.R. China
| | - Yonghui Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Shanghai, 201203, P.R. China
| | - Aihua Wu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Shanghai, 201203, P.R. China
| | - Yuefeng Rao
- The First Affiliated Hospital of the College of Medicine, Zhejiang University, Hangzhou, 310003, P.R. China
| | - Yongzhuo Huang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Shanghai, 201203, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
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103
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Muyayalo KP, Li ZH, Mor G, Liao AH. Modulatory effect of intravenous immunoglobulin on Th17/Treg cell balance in women with unexplained recurrent spontaneous abortion. Am J Reprod Immunol 2018; 80:e13018. [PMID: 29984444 DOI: 10.1111/aji.13018] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 06/18/2018] [Indexed: 12/15/2022] Open
Abstract
Recurrent spontaneous abortion (RSA) is a growing problem worldwide. In a majority of cases, the cause remains unknown but there is increasing evidence that immunologic factors play an important role. Intravenous immunoglobulin (IVIg) therapy has been proposed to have immune modulatory effects and therefore been applicable for the treatment of patients with RSA. Although its efficacy is still controversial, several recent studies suggest that IVIg treatment may improve pregnancy outcomes. CD4+ T cells and their related cytokines play an important role in maternal-fetal immune regulation, and an imbalance of Th17/Treg cell ratio has been proposed as a cause for RSA. We review the scientific evidence supporting a modulatory effect of IVIg on Th17/Treg cell balance and discuss the potential mechanisms how IVIg might enhance Treg cells function. We propose that correction of Th17/Treg cell dysregulation could be one of the mechanisms that can explain the positive therapeutic effects of IVIg therapy. Consequently, selecting patients with abnormal Th17/Treg cell ratios could increase the success of IVIg therapy.
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Affiliation(s)
- Kahinho P Muyayalo
- Family Planning Research Institute, Center for Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhi-Hui Li
- Family Planning Research Institute, Center for Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Gil Mor
- Reproductive Immunology Unit, Department of Obstetrics Gynecology and Reproductive Science, Yale University School of Medicine, New Haven, Connecticut
| | - Ai-Hua Liao
- Family Planning Research Institute, Center for Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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104
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Betts A, Keunecke A, van Steeg TJ, van der Graaf PH, Avery LB, Jones H, Berkhout J. Linear pharmacokinetic parameters for monoclonal antibodies are similar within a species and across different pharmacological targets: A comparison between human, cynomolgus monkey and hFcRn Tg32 transgenic mouse using a population-modeling approach. MAbs 2018; 10:751-764. [PMID: 29634430 PMCID: PMC6150614 DOI: 10.1080/19420862.2018.1462429] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The linear pharmacokinetics (PK) of therapeutic monoclonal antibodies (mAbs) can be considered a class property with values that are similar to endogenous IgG. Knowledge of these parameters across species could be used to avoid unnecessary in vivo PK studies and to enable early PK predictions and pharmacokinetic/pharmacodynamic (PK/PD) simulations. In this work, population-pharmacokinetic (popPK) modeling was used to determine a single set of ‘typical’ popPK parameters describing the linear PK of mAbs in human, cynomolgus monkey and transgenic mice expressing the human neonatal Fc receptor (hFcRn Tg32), using a rich dataset of 27 mAbs. Non-linear PK was excluded from the datasets and a 2-compartment model was applied to describe mAb disposition. Typical human popPK estimates compared well with data from comparator mAbs with linear PK in the clinic. Outliers with higher than typical clearance were found to have non-specific interactions in an affinity-capture self-interaction nanoparticle spectroscopy assay, offering a potential tool to screen out these mAbs at an early stage. Translational strategies were investigated for prediction of human linear PK of mAbs, including use of typical human popPK parameters and allometric exponents from cynomolgus monkey and Tg32 mouse. Each method gave good prediction of human PK with parameters predicted within 2-fold. These strategies offer alternative options to the use of cynomolgus monkeys for human PK predictions of linear mAbs, based on in silico methods (typical human popPK parameters) or using a rodent species (Tg32 mouse), and call into question the value of completing extensive in vivo preclinical PK to inform linear mAb PK.
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Affiliation(s)
- Alison Betts
- a Department of Biomedicine Design , Pfizer Inc. , Cambridge , MA , USA
| | | | | | - Piet H van der Graaf
- c Division of Systems Biomedicine and Pharmacology, Leiden Academic Centre for Drug Research , RA Leiden , The Netherlands
| | - Lindsay B Avery
- d Department of Biomedicine Design , Pfizer Inc. , Andover , MA , USA
| | - Hannah Jones
- a Department of Biomedicine Design , Pfizer Inc. , Cambridge , MA , USA
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105
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Richter WF, Christianson GJ, Frances N, Grimm HP, Proetzel G, Roopenian DC. Hematopoietic cells as site of first-pass catabolism after subcutaneous dosing and contributors to systemic clearance of a monoclonal antibody in mice. MAbs 2018; 10:803-813. [PMID: 29621428 DOI: 10.1080/19420862.2018.1458808] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The neonatal Fc receptor (FcRn) has been demonstrated to contribute to a high bioavailability of monoclonal antibodies (mAbs). In this study, we explored the cellular sites of FcRn-mediated protection after subcutaneous (SC) and intravenous (IV) administration. SC absorption and IV disposition kinetics of a mAb were studied in hFcRn transgenic (Tg) bone marrow chimeric mice in which hFcRn was restricted to radioresistant cells or hematopoietic cells. SC bioavailabilities close to 90% were observed in hFcRn Tg mice and chimeric mice with hFcRn expression in hematopoietic cells, whereas SC bioavailabilities were markedly lower when FcRn was missing in hematopoietic cells. Our study demonstrates: 1) FcRn in radiosensitive hematopoietic cells is required for high SC bioavailability, indicating first-pass catabolism after SC administration by hematopoietic cells; 2) FcRn-mediated transcytosis or recycling by radioresistent cells is not required for high SC bioavailability; and 3) after IV administration hematopoietic and radioresistent cells contribute about equally to clearance of the mAb. A pharmacokinetic model was devised to describe a mixed elimination via radioresistent and hematopoietic cells from vascular and extravascular compartments, respectively. Overall, the study indicates a relevant role of hematopoietic cells for first-pass clearance of mAbs after SC administration and confirms their role in the overall clearance of mAbs.
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Affiliation(s)
- Wolfgang F Richter
- a Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse , Basel , Switzerland
| | | | - Nicolas Frances
- a Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse , Basel , Switzerland
| | - Hans Peter Grimm
- a Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse , Basel , Switzerland
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106
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Engler FA, Polli JR, Li T, An B, Otteneder M, Qu J, Balthasar JP. "Catch-and-Release" Anti-Carcinoembryonic Antigen Monoclonal Antibody Leads to Greater Plasma and Tumor Exposure in a Mouse Model of Colorectal Cancer. J Pharmacol Exp Ther 2018; 366:205-219. [PMID: 29735609 DOI: 10.1124/jpet.117.246900] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 05/01/2018] [Indexed: 11/22/2022] Open
Abstract
In this study, we examined the effects of target expression, neonatal Fc receptor (FcRn) expression in tumors, and pH-dependent target binding on the disposition of monoclonal antibodies (mAbs) in murine models of colorectal cancer. A panel of anti-carcinoembryonic antigen (CEA) mAbs was developed via standard hybridoma technology and then evaluated for pH-dependent CEA binding. Binding was assessed via immunoassay and radioligand binding assays. 10H6, a murine IgG1 mAb with high affinity for CEA at pH = 7.4 (KD = 12.6 ± 1.7 nM) and reduced affinity at pH = 6.0 (KD = 144.6 ± 21.8 nM), and T84.66, which exhibits pH-independent CEA binding (KD = 1.1 ± 0.11 and 1.4 ± 0.16 nM at pH 7.4 and 6.0), were selected for pharmacokinetic investigations. We evaluated pharmacokinetics after intravenous administration to control mice and to mice bearing tumors with (MC38CEA+, LS174T) and without (MC38CEA-) CEA expression and with or without expression of murine FcRn, at doses of 0.1, 1, and 10 mg/kg. 10H6 displayed linear pharmacokinetics in mice bearing MC38CEA+ or MC38CEA- tumors. T84.66 displayed linear pharmacokinetics in mice with MC38CEA- tumors but dose-dependent nonlinear pharmacokinetics in mice bearing MC38CEA+ In addition to the improved plasma pharmacokinetic profile (i.e., linear pharmacokinetics, longer terminal half-life), 10H6 exhibited improved exposure in MC38CEA+ tumors relative to T84.66. In mice bearing tumors with CEA expression, but lacking expression of murine FcRn (LS174T), 10H6 demonstrated nonlinear pharmacokinetics, with rapid clearance at low dose. These data are consistent with the hypothesis that pH-dependent CEA binding allows mAb dissociation from target in acidified endosomes, enabling FcRn-mediated protection from target-mediated elimination in mice bearing MC38CEA+ tumors.
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Affiliation(s)
- Frank A Engler
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo (F.A.E., J.R.P., T.L., B.A., J.Q., J.P.B.) and New York State Center of Excellence in Bioinformatics and Life Sciences (B.A., J.Q.), Buffalo, New York; and F. Hoffmann-La Roche Ltd., Roche Innovation Center, Basel, Switzerland (M.O.)
| | - Joseph Ryan Polli
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo (F.A.E., J.R.P., T.L., B.A., J.Q., J.P.B.) and New York State Center of Excellence in Bioinformatics and Life Sciences (B.A., J.Q.), Buffalo, New York; and F. Hoffmann-La Roche Ltd., Roche Innovation Center, Basel, Switzerland (M.O.)
| | - Tommy Li
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo (F.A.E., J.R.P., T.L., B.A., J.Q., J.P.B.) and New York State Center of Excellence in Bioinformatics and Life Sciences (B.A., J.Q.), Buffalo, New York; and F. Hoffmann-La Roche Ltd., Roche Innovation Center, Basel, Switzerland (M.O.)
| | - Bo An
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo (F.A.E., J.R.P., T.L., B.A., J.Q., J.P.B.) and New York State Center of Excellence in Bioinformatics and Life Sciences (B.A., J.Q.), Buffalo, New York; and F. Hoffmann-La Roche Ltd., Roche Innovation Center, Basel, Switzerland (M.O.)
| | - Michael Otteneder
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo (F.A.E., J.R.P., T.L., B.A., J.Q., J.P.B.) and New York State Center of Excellence in Bioinformatics and Life Sciences (B.A., J.Q.), Buffalo, New York; and F. Hoffmann-La Roche Ltd., Roche Innovation Center, Basel, Switzerland (M.O.)
| | - Jun Qu
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo (F.A.E., J.R.P., T.L., B.A., J.Q., J.P.B.) and New York State Center of Excellence in Bioinformatics and Life Sciences (B.A., J.Q.), Buffalo, New York; and F. Hoffmann-La Roche Ltd., Roche Innovation Center, Basel, Switzerland (M.O.)
| | - Joseph P Balthasar
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo (F.A.E., J.R.P., T.L., B.A., J.Q., J.P.B.) and New York State Center of Excellence in Bioinformatics and Life Sciences (B.A., J.Q.), Buffalo, New York; and F. Hoffmann-La Roche Ltd., Roche Innovation Center, Basel, Switzerland (M.O.)
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107
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Gunasekaran M, Chatterjee PK, Shih A, Imperato GH, Addorisio M, Kumar G, Lee A, Graf JF, Meyer D, Marino M, Puleo C, Ashe J, Cox MA, Mak TW, Bouton C, Sherry B, Diamond B, Andersson U, Coleman TR, Metz CN, Tracey KJ, Chavan SS. Immunization Elicits Antigen-Specific Antibody Sequestration in Dorsal Root Ganglia Sensory Neurons. Front Immunol 2018; 9:638. [PMID: 29755449 PMCID: PMC5932385 DOI: 10.3389/fimmu.2018.00638] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 03/14/2018] [Indexed: 12/11/2022] Open
Abstract
The immune and nervous systems are two major organ systems responsible for host defense and memory. Both systems achieve memory and learning that can be retained, retrieved, and utilized for decades. Here, we report the surprising discovery that peripheral sensory neurons of the dorsal root ganglia (DRGs) of immunized mice contain antigen-specific antibodies. Using a combination of rigorous molecular genetic analyses, transgenic mice, and adoptive transfer experiments, we demonstrate that DRGs do not synthesize these antigen-specific antibodies, but rather sequester primarily IgG1 subtype antibodies. As revealed by RNA-seq and targeted quantitative PCR (qPCR), dorsal root ganglion (DRG) sensory neurons harvested from either naïve or immunized mice lack enzymes (i.e., RAG1, RAG2, AID, or UNG) required for generating antibody diversity and, therefore, cannot make antibodies. Additionally, transgenic mice that express a reporter fluorescent protein under the control of Igγ1 constant region fail to express Ighg1 transcripts in DRG sensory neurons. Furthermore, neural sequestration of antibodies occurs in mice rendered deficient in neuronal Rag2, but antibody sequestration is not observed in DRG sensory neurons isolated from mice that lack mature B cells [e.g., Rag1 knock out (KO) or μMT mice]. Finally, adoptive transfer of Rag1-deficient bone marrow (BM) into wild-type (WT) mice or WT BM into Rag1 KO mice revealed that antibody sequestration was observed in DRG sensory neurons of chimeric mice with WT BM but not with Rag1-deficient BM. Together, these results indicate that DRG sensory neurons sequester and retain antigen-specific antibodies released by antibody-secreting plasma cells. Coupling this work with previous studies implicating DRG sensory neurons in regulating antigen trafficking during immunization raises the interesting possibility that the nervous system collaborates with the immune system to regulate antigen-mediated responses.
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Affiliation(s)
- Manojkumar Gunasekaran
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Prodyot K. Chatterjee
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Andrew Shih
- Center for Genomics and Human Genetics, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Gavin H. Imperato
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Meghan Addorisio
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Gopal Kumar
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Annette Lee
- Center for Genomics and Human Genetics, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, United States
| | - John F. Graf
- GE Global Research Center, Niskayuna, NY, United States
| | - Dan Meyer
- GE Global Research Center, Niskayuna, NY, United States
| | | | | | - Jeffrey Ashe
- GE Global Research Center, Niskayuna, NY, United States
| | - Maureen A. Cox
- The Campbell Family Institute for Breast Cancer Research, University Health Network, Toronto, ON, Canada
| | - Tak W. Mak
- The Campbell Family Institute for Breast Cancer Research, University Health Network, Toronto, ON, Canada
| | - Chad Bouton
- Center for Bioelectronic Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Barbara Sherry
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, United States
- Center for Immunology and Inflammation, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Betty Diamond
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, United States
- Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Ulf Andersson
- Department of Women’s and Children’s Health, Karolinska Institutet, Solna, Sweden
| | - Thomas R. Coleman
- Center for Molecular Innovation, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Christine N. Metz
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, United States
| | - Kevin J. Tracey
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, United States
- Center for Bioelectronic Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Sangeeta S. Chavan
- Center for Biomedical Science, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, United States
- Center for Bioelectronic Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
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108
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Li B, Xu L, Tao F, Xie K, Wu Z, Li Y, Li J, Chen K, Pi C, Mendelsohn A, Larrick JW, Gu H, Fang J. Simultaneous exposure to FcγR and FcαR on monocytes and macrophages enhances antitumor activity in vivo. Oncotarget 2018; 8:39356-39366. [PMID: 28454118 PMCID: PMC5503618 DOI: 10.18632/oncotarget.17000] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 03/11/2017] [Indexed: 02/05/2023] Open
Abstract
Therapeutic antibodies are effective for tumor immunotherapy and exhibit prominent clinical effects. All approved antibody therapeutics utilize IgG as the molecular format. Antibody-dependent cell-mediated cytotoxicity (ADCC) is a key mechanism for tumor cell killing by antibodies. For IgG antibodies, ADCC depends on FcγR-expressing cells, such as natural killer (NK) cells. However, in patients with a high tumor burden, antibody therapeutics may lose efficacy owing to exhaustion of FcγR-expressing effector cells as well as the inhibitory effects of certain FcγRs on effector cells. To achieve more potent effector functions, we engineered an anti-CD20 antibody to contain both IgG Fc and IgA Fc domains. These engineered antibodies interacted with both IgG and IgA Fc receptors (FcγR and FcαR) and recruited a broader range of effector cells, including monocytes, macrophages, neutrophils, and NK cells, thereby enhancing antibody-dependent cellular phagocytosis. Using transgenic mice expressing the FcαRI (CD89) in macrophages, we demonstrated that recombinant antibodies bearing the chimeric IgG and IgA Fc exhibited potent in vivo antitumor activity. Additionally, in a short-term peritoneal model using CD20-transfected LLC target cells, the in vivo cytotoxic activity of hybrid recombinant antibodies was mediated by macrophages with significant reduction in the absence of FcαRI. Our findings supported targeting of FcαRI on monocytes and macrophages for improved tumor immunotherapy.
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Affiliation(s)
- Bingyu Li
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Lijun Xu
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Fei Tao
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Kun Xie
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Zhiqiang Wu
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - You Li
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Jie Li
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Kaiming Chen
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Chenyu Pi
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | | | | | - Hua Gu
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Jianmin Fang
- School of Life Sciences and Technology, Tongji University, Shanghai, China.,Shanghai Tongji Hospital, Tongji University, Shanghai, China.,Tongji University Suzhou Institute, Suzhou, China.,Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
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109
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Alberio T, Forlani G, Lualdi M, Tosi G, Accolla RS, Fasano M. Neonatal Fc receptor is involved in the protection of fibrinogen after its intake in peripheral blood mononuclear cells. J Transl Med 2018. [PMID: 29540212 PMCID: PMC5853075 DOI: 10.1186/s12967-018-1446-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background Fibrinogen is a central player in the blood coagulation cascade and one of the most abundant plasma proteins. This glycoprotein also triggers important events (e.g., cell spreading, the respiratory burst and degranulation) in neutrophil cells via a αMβ2 integrin-mediated binding to the cell surface. Yet, little is known about the interaction of fibrinogen with leukocytes other than neutrophils or stimulated monocytes, although high amounts of fibrinogen protein can also be found in lymphocytes, particularly in T-cells. The aim of the present work is to unveil the dynamics and the function of fibrinogen intake in T-cells. Methods Using the Jurkat cell line as a T-cells model we performed fibrinogen intake/competition experiments. Moreover, by means of a targeted gene knock-down by RNA-interference, we investigated the dynamics of the intake mechanism. Results Here we show that (i) fibrinogen, although not expressed in human peripheral blood mononuclear cells, can be internalized by these cells; (ii) fibrinogen internalization curves show a hyperbolic behavior, which is affected by the presence of serum in the medium, (iii) FITC-conjugated fibrinogen is released and re-internalized by adjacent cells, (iv) the presence of human serum albumin (HSA) or immunoglobulin G (IgG), which are both protected from intracellular degradation by the interaction with the neonatal Fc receptor (FcRn), results in a decreased amount of internalized fibrinogen, and (v) FcRn-knockdown affects the dynamics of fibrinogen internalization. Conclusions We demonstrated here for the first time that fibrinogen can be internalized and released by T-lymphocyte cells. Moreover, we showed that the presence of serum, HSA or IgG in the culture medium results in a reduction of the amount of internalized fibrinogen in these cells. Thus, we obtained experimental evidence for the expression of FcRn in T-lymphocyte cells and we propose this receptor as involved in the protection of fibrinogen from intracellular lysosomal degradation. Electronic supplementary material The online version of this article (10.1186/s12967-018-1446-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tiziana Alberio
- Department of Science and High Technology, University of Insubria, Via Manara, 7, 21052, Busto Arsizio, VA, Italy. .,Center of Neuroscience, University of Insubria, Busto Arsizio, Italy. .,Center of Bioinformatics, University of Insubria, Como, Italy.
| | - Greta Forlani
- Center of Bioinformatics, University of Insubria, Como, Italy.,Department of Medicine and Surgery, University of Insubria, Via Ottorino Rossi, 9, 21100, Varese, Italy
| | - Marta Lualdi
- Department of Science and High Technology, University of Insubria, Via Manara, 7, 21052, Busto Arsizio, VA, Italy
| | - Giovanna Tosi
- Department of Medicine and Surgery, University of Insubria, Via Ottorino Rossi, 9, 21100, Varese, Italy
| | - Roberto S Accolla
- Center of Bioinformatics, University of Insubria, Como, Italy.,Department of Medicine and Surgery, University of Insubria, Via Ottorino Rossi, 9, 21100, Varese, Italy
| | - Mauro Fasano
- Department of Science and High Technology, University of Insubria, Via Manara, 7, 21052, Busto Arsizio, VA, Italy.,Center of Neuroscience, University of Insubria, Busto Arsizio, Italy.,Center of Bioinformatics, University of Insubria, Como, Italy
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110
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Chia J, Louber J, Glauser I, Taylor S, Bass GT, Dower SK, Gleeson PA, Verhagen AM. Half-life-extended recombinant coagulation factor IX-albumin fusion protein is recycled via the FcRn-mediated pathway. J Biol Chem 2018. [PMID: 29523681 PMCID: PMC5925791 DOI: 10.1074/jbc.m117.817064] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The neonatal Fc receptor (FcRn) has a pivotal role in albumin and IgG homeostasis. Internalized IgG captured by FcRn under acidic endosomal conditions is recycled to the cell surface where exocytosis and a shift to neutral pH promote extracellular IgG release. Although a similar mechanism is proposed for FcRn-mediated albumin intracellular trafficking and recycling, this pathway is less well defined but is relevant to the development of therapeutics exploiting FcRn to extend the half-life of short-lived plasma proteins. Recently, a long-acting recombinant coagulation factor IX–albumin fusion protein (rIX-FP) has been approved for the management of hemophilia B. Fusion to albumin potentially enables internalized proteins to engage FcRn and escape lysosomal degradation. In this study, we present for the first time a detailed investigation of the FcRn-mediated recycling of albumin and the albumin fusion protein rIX-FP. We demonstrate that following internalization via FcRn at low pH, rIX-FP, like albumin, is detectable within the early endosome and rapidly (within 10–15 min) traffics into the Rab11+ recycling endosomes, from where it is exported from the cell. Similarly, rIX-FP and albumin taken up by fluid-phase endocytosis at physiological pH traffics into the Rab11+ recycling compartment in FcRn-positive cells but into the lysosomal compartment in FcRn-negative cells. As expected, recombinant factor IX (without albumin fusion) and an FcRn interaction–defective albumin variant localized to the lysosomal compartments of both FcRn-expressing and nonexpressing cells. These results indicate that FcRn-mediated recycling via the albumin moiety is a mechanism for the half-life extension of rIX-FP observed in clinical studies.
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Affiliation(s)
- Jenny Chia
- From the CSL Limited, Research, Bio21 Molecular Science and Biotechnology Institute, Melbourne, Victoria 3010, Australia
| | - Jade Louber
- the Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victoria 3010, Australia, and
| | - Isabelle Glauser
- From the CSL Limited, Research, Bio21 Molecular Science and Biotechnology Institute, Melbourne, Victoria 3010, Australia
| | - Shirley Taylor
- From the CSL Limited, Research, Bio21 Molecular Science and Biotechnology Institute, Melbourne, Victoria 3010, Australia
| | - Greg T Bass
- From the CSL Limited, Research, Bio21 Molecular Science and Biotechnology Institute, Melbourne, Victoria 3010, Australia.,the Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Steve K Dower
- From the CSL Limited, Research, Bio21 Molecular Science and Biotechnology Institute, Melbourne, Victoria 3010, Australia
| | - Paul A Gleeson
- the Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victoria 3010, Australia, and
| | - Anne M Verhagen
- From the CSL Limited, Research, Bio21 Molecular Science and Biotechnology Institute, Melbourne, Victoria 3010, Australia,
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111
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Nilsen J, Sandlie I, Roopenian DC, Andersen JT. Animal models for evaluation of albumin-based therapeutics. Curr Opin Chem Eng 2018. [DOI: 10.1016/j.coche.2017.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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112
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Downregulation of the neonatal Fc receptor expression in non-small cell lung cancer tissue is associated with a poor prognosis. Oncotarget 2018; 7:54415-54429. [PMID: 27384673 PMCID: PMC5342352 DOI: 10.18632/oncotarget.10074] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 05/14/2016] [Indexed: 12/19/2022] Open
Abstract
Lung cancer is the leading cause of cancer-related death worldwide. Although the recommended tumor, node and metastasis (TNM) classification and stage determination are important to select therapeutic options for patients with non-small cell lung carcinoma (NSCLC), additional molecular markers are required to indicate the prognosis, in particular within a specific stage, and help with the management of patients. Because neonatal Fc receptor (FcRn) has recently been involved in colon cancer immunosurveillance, we measured its expression in non-cancerous and NSCLC lung tissues and evaluated its prognostic value in overall survival for patient with NSCLC. FcRn expression was determined at both mRNA and protein levels on cancerous and adjacent non-cancerous tissues from 80 NSCLC patients. In NSCLC, FcRn was mainly found in resident and tumor infiltrating immune cells. The corresponding mRNA and protein were significantly less abundant in lung tumor than non-cancerous tissue. Moreover, analysis of our cohort and datasets from the public data bases show that FCGRT mRNA down-regulation is a robust and independent, unfavorable predictive factor of NSCLC patient survival. We conclude that FCGRT mRNA expression may be a useful additional marker for immunoscoring, reflecting tumor immune system, and help in the decision-making process for NSCLC patients.
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113
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Han AR, Lee SK. Immune modulation of i.v. immunoglobulin in women with reproductive failure. Reprod Med Biol 2018; 17:115-124. [PMID: 29692668 PMCID: PMC5902469 DOI: 10.1002/rmb2.12078] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 11/09/2017] [Indexed: 12/11/2022] Open
Abstract
Background The mechanism of maternal immune tolerance of the semi‐allogenic fetus has been explored extensively. The immune reaction to defend from invasion by pathogenic microorganisms should be maintained during pregnancy. An imbalance between the immune tolerance to the fetus and immune activation to the pathogenic organisms is associated with poor pregnancy outcomes. This emphasizes that the immune mechanism of successful reproduction is not just immune suppression, but adequate immune modulation. Methods In this review, the action of i.v. immunoglobulin G (IVIg) on the immune system and its efficacy in reproductive failure (RF) was summarized. Also suggested is the indication of IVIg therapy for women with RF. Main findings (Results) Based on the mechanism of the immune regulation of IVIg and following confirmation of the immune modulation effects of it in various aberrant immune parameters in patients with RF, it is obvious that IVIg is effective in recurrent pregnancy losses and repeated implantation failures with immunologic disturbances. Conclusion The authors recommend IVIg therapy in patients with RF with aberrant cellular immunologic parameters, including a high natural killer cell proportion and its cytotoxicity or elevated T helper 1 to T helper 2 ratio, based on each clinic's cut‐off values. Further clinical studies about the safety of IVIg in the fetus and its efficacy in other immunologic abnormalities of RF are needed.
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Affiliation(s)
- Ae R Han
- Department of Obstetrics and Gynecology Gangseo Mizmedi Hospital Seoul South Korea.,Department of Obstetrics and Gynecology Eulji University College of Medicine Daejeon South Korea
| | - Sung K Lee
- Department of Obstetrics and Gynecology Konyang University College of Medicine Daejeon South Korea
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114
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Yang B, Kim JC, Seong J, Tae G, Kwon I. Comparative studies of the serum half-life extension of a protein via site-specific conjugation to a species-matched or -mismatched albumin. Biomater Sci 2018; 6:2092-2100. [DOI: 10.1039/c8bm00456k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Human serum albumin (HSA) has been investigated as a serum half-life extender of therapeutic proteins thanks to its unusually long serum half-life.
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Affiliation(s)
- Byungseop Yang
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju
- Republic of Korea
| | - Jong Chul Kim
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju
- Republic of Korea
| | - Jihyoun Seong
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju
- Republic of Korea
| | - Giyoong Tae
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju
- Republic of Korea
| | - Inchan Kwon
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju
- Republic of Korea
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115
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Multivalent Fcγ-receptor engagement by a hexameric Fc-fusion protein triggers Fcγ-receptor internalisation and modulation of Fcγ-receptor functions. Sci Rep 2017; 7:17049. [PMID: 29213127 PMCID: PMC5719016 DOI: 10.1038/s41598-017-17255-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 11/17/2017] [Indexed: 12/14/2022] Open
Abstract
Engagement of Fcγ-receptors triggers a range of downstream signalling events resulting in a diverse array of immune functions. As a result, blockade of Fc-mediated function is an important strategy for the control of several autoimmune and inflammatory conditions. We have generated a hexameric-Fc fusion protein (hexameric-Fc) and tested the consequences of multi-valent Fcγ-receptor engagement in in vitro and in vivo systems. In vitro engagement of hexameric-Fc with FcγRs showed complex binding interactions that altered with receptor density and triggered the internalisation and degradation of Fcγ-receptors. This caused a disruption of Fc-binding and phagocytosis. In vivo, in a mouse ITP model we observed a short half-life of hexameric-Fc but were nevertheless able to observe inhibition of platelet phagocytosis several days after hexameric-Fc dosing. In cynomolgus monkeys, we again observed a short half-life, but were able to demonstrate effective FcγR blockade. These findings demonstrate the ability of multi-valent Fc-based therapeutics to interfere with FcγR function and a potential mechanism through which they could have a sustained effect; the internalisation and degradation of FcγRs.
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116
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Wilcox CR, Holder B, Jones CE. Factors Affecting the FcRn-Mediated Transplacental Transfer of Antibodies and Implications for Vaccination in Pregnancy. Front Immunol 2017; 8:1294. [PMID: 29163461 PMCID: PMC5671757 DOI: 10.3389/fimmu.2017.01294] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 09/26/2017] [Indexed: 11/30/2022] Open
Abstract
At birth, neonates are particularly vulnerable to infection and transplacental transfer of immunoglobulin G (IgG) from mother to fetus provides crucial protection in the first weeks of life. Transcytosis of IgG occurs via binding with the neonatal Fc receptor (FcRn) in the placental synctiotrophoblast. As maternal vaccination becomes an increasingly important strategy for the protection of young infants, improving our understanding of transplacental transfer and the factors that may affect this will become increasingly important, especially in low-income countries where the burden of morbidity and mortality is highest. This review highlights factors of relevance to maternal vaccination that may modulate placental transfer—IgG subclass, glycosylation of antibody, total maternal IgG concentration, maternal disease, infant gestational age, and birthweight—and outlines the conflicting evidence and questions that remain regarding the complexities of these relationships. Furthermore, the intricacies of the Ab–FcRn interaction remain poorly understood and models that may help address future research questions are described.
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Affiliation(s)
- Christopher R Wilcox
- National Institute of Health Research Wellcome Trust Clinical Research Facility, Southampton, United Kingdom
| | - Beth Holder
- Paediatrics Section, Division of Infectious Diseases, Centre for International Child Health, Imperial College London, London, United Kingdom
| | - Christine E Jones
- Faculty of Medicine, Institute for Life Sciences, University of Southampton, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
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117
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Wang X, Mathieu M, Brezski RJ. IgG Fc engineering to modulate antibody effector functions. Protein Cell 2017; 9:63-73. [PMID: 28986820 PMCID: PMC5777978 DOI: 10.1007/s13238-017-0473-8] [Citation(s) in RCA: 233] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 06/19/2017] [Indexed: 01/18/2023] Open
Abstract
Therapeutic monoclonal antibodies are among the most effective biotherapeutics to date. An important aspect of antibodies is their ability to bind antigen while at the same time recruit immune effector functions. The majority of approved recombinant monoclonal antibody therapies are of the human IgG1 subclass, which can engage both humoral and cellular components of the immune system. The wealth of information generated about antibodies has afforded investigators the ability to molecularly engineer antibodies to modulate effector functions. Here, we review various antibody engineering efforts intended to improve efficacy and safety relative to the human IgG isotype. Further, we will discuss proposed mechanisms by which engineering approaches led to modified interactions with immune components and provide examples of clinical studies using next generation antibodies.
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Affiliation(s)
- Xinhua Wang
- Genentech, Antibody Engineering, South San Francisco, CA, 94080, USA
| | - Mary Mathieu
- Genentech, Antibody Engineering, South San Francisco, CA, 94080, USA
| | - Randall J Brezski
- Genentech, Antibody Engineering, South San Francisco, CA, 94080, USA.
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118
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Physiologically Based Pharmacokinetic Modeling of Therapeutic Proteins. J Pharm Sci 2017; 106:2270-2275. [DOI: 10.1016/j.xphs.2017.03.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 03/28/2017] [Accepted: 03/30/2017] [Indexed: 01/12/2023]
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119
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Bukrinski JT, Sønderby P, Antunes F, Andersen B, Schmidt EGW, Peters GHJ, Harris P. Glucagon-like Peptide 1 Conjugated to Recombinant Human Serum Albumin Variants with Modified Neonatal Fc Receptor Binding Properties. Impact on Molecular Structure and Half-Life. Biochemistry 2017; 56:4860-4870. [PMID: 28799326 DOI: 10.1021/acs.biochem.7b00492] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Glucagon-like peptide 1 (GLP-1) is a small incretin hormone stimulated by food intake, resulting in an amplification of the insulin response. Though GLP-1 is interesting as a drug candidate for the treatment of type 2 diabetes mellitus, its short plasma half-life of <3 min limits its clinical use. A strategy for extending the half-life of GLP-1 utilizes the long half-life of human serum albumin (HSA) by combining the two via chemical conjugation or genetic fusion. HSA has a plasma half-life of around 21 days because of its interaction with the neonatal Fc receptor (FcRn) expressed in endothelial cells of blood vessels, which rescues circulating HSA from lysosomal degradation. We have conjugated GLP-1 to C34 of native sequence recombinant HSA (rHSA) and two rHSA variants, one with increased and one with decreased binding affinity for human FcRn. We have investigated the impact of conjugation on FcRn binding affinities, GLP-1 potency, and pharmacokinetics, combined with the solution structure of the rHSA variants and GLP-1-albumin conjugates. The solution structures, determined by small-angle X-ray scattering, show the GLP-1 pointing away from the surface of rHSA. Combining the solution structures with the available structural information about the FcRn and GLP-1 receptor obtained from X-ray crystallography, we can explain the observed in vitro and in vivo behavior. We conclude that the conjugation of GLP-1 to rHSA does not affect the interaction between rHSA and FcRn, while the observed decrease in the potency of GLP-1 can be explained by a steric hindrance of binding of GLP-1 to its receptor.
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Affiliation(s)
| | - Pernille Sønderby
- Department of Chemistry, Technical University of Denmark , Kemitorvet 207, DK-2800 Kongens Lyngby, Denmark
| | - Filipa Antunes
- Albumedix Ltd. , Castle Court, 59 Castle Boulevard, Nottingham NG7 1FD, United Kingdom
| | | | | | - Günther H J Peters
- Department of Chemistry, Technical University of Denmark , Kemitorvet 207, DK-2800 Kongens Lyngby, Denmark
| | - Pernille Harris
- Department of Chemistry, Technical University of Denmark , Kemitorvet 207, DK-2800 Kongens Lyngby, Denmark
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120
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Ryman JT, Meibohm B. Pharmacokinetics of Monoclonal Antibodies. CPT-PHARMACOMETRICS & SYSTEMS PHARMACOLOGY 2017; 6:576-588. [PMID: 28653357 PMCID: PMC5613179 DOI: 10.1002/psp4.12224] [Citation(s) in RCA: 468] [Impact Index Per Article: 66.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 12/13/2022]
Abstract
Monoclonal antibodies (mAbs) have developed in the last two decades into the backbone of pharmacotherapeutic interventions in a variety of indications, with currently more than 40 mAbs approved by the US Food and Drug Administration, and several dozens more in clinical development. This tutorial will review major drug disposition processes relevant for mAbs, and will highlight product‐specific and patient‐specific factors that modulate their pharmacokinetic (PK) behavior and need to be considered for successful clinical therapy.
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Affiliation(s)
- Josiah T Ryman
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Bernd Meibohm
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee, USA
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121
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Treffers LW, Hiemstra IH, Kuijpers TW, van den Berg TK, Matlung HL. Neutrophils in cancer. Immunol Rev 2017; 273:312-28. [PMID: 27558343 DOI: 10.1111/imr.12444] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Neutrophils play an important role in cancer. This does not only relate to the well-established prognostic value of the presence of neutrophils, either in the blood or in tumor tissue, in the context of cancer progression or for the monitoring of therapy, but also to their active role in the progression of cancer. In the current review, we describe what is known in general about the role of neutrophils in cancer. What is emerging is a complex, rather heterogeneous picture with both pro- and anti-tumorigenic roles, which apparently differs with cancer type and disease stage. Furthermore, we will discuss the well-known role of neutrophils as myeloid-derived suppressor cells (MDSC), and also on the role of neutrophils as important effector cells during antibody therapy in cancer. It is clear that neutrophils contribute substantially to cancer progression in multiple ways, and this includes both direct effects on the cancer cells and indirect effect on the tumor microenvironment. While in many cases neutrophils have been shown to promote tumor progression, for instance by acting as MDSC, there are also protective effects, particularly when antibody immunotherapy is performed. A better understanding of the role of neutrophils is likely to provide opportunities for immunomodulation and for improving the treatment of cancer patients.
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Affiliation(s)
- Louise W Treffers
- Sanquin Research, and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Ida H Hiemstra
- Sanquin Research, and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Taco W Kuijpers
- Sanquin Research, and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Emma Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Timo K van den Berg
- Sanquin Research, and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Hanke L Matlung
- Sanquin Research, and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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122
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Osaki F, Tabata K, Oe T. Quantitative LC/ESI-SRM/MS of antibody biopharmaceuticals: use of a homologous antibody as an internal standard and three-step method development. Anal Bioanal Chem 2017; 409:5523-5532. [PMID: 28710515 DOI: 10.1007/s00216-017-0488-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/29/2017] [Accepted: 06/22/2017] [Indexed: 11/27/2022]
Abstract
Monoclonal antibody-based therapeutic agents (antibody drugs) have attracted considerable attention as a new type of drug. Concomitantly, the use of quantitative approaches for characterizing antibody drugs, such as liquid chromatography (LC)-mass spectrometry (MS), has increased. Generally, selective quantification of antibody drugs is done using unique peptides from variable regions (V H and V L) as surrogate peptides. Further, numerous internal standards (ISs) such as stable isotope-labeled (SIL)-intact proteins and SIL-surrogate peptides are used. However, developing LC-MS methodology for characterizing antibody drugs is time-consuming and costly. Therefore, LC-MS is difficult to apply for this purpose, particularly during the drug discovery stage when numerous candidates must be evaluated. Here, we demonstrate an efficient approach to developing a quantitative LC/electrospray ionization (ESI)-selected reaction monitoring (SRM)/MS method for characterizing antibody drugs. The approach consists of the following features: (i) standard peptides or SIL-IS are not required; (ii) a peptide from the homologous monoclonal antibody serves as an IS; (iii) method development is monitored using a spiked plasma sample and one quantitative MS analysis; and (iv) three predicted SRM assays are performed to optimize quantitative SRM conditions such as transition, collision energy, and declustering potential values. Using this strategy, we developed quantitative SRM methods for infliximab, alemtuzumab, and bevacizumab with sufficient precision (<20%)/accuracy (<±20%) for use in the drug discovery stage. We have also demonstrated that choosing a higher homologous peptide pair (from analyte mAb/IS mAb) is necessary to obtain the sufficient precision and accuracy. Graphical abstract ᅟ.
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Affiliation(s)
- Fumio Osaki
- Department of Bio-analytical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-aoba, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
- Analysis & Pharmacokinetics Research Labs, Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba, Ibaraki, 305-8585, Japan
| | - Kenji Tabata
- Analysis & Pharmacokinetics Research Labs, Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba, Ibaraki, 305-8585, Japan
| | - Tomoyuki Oe
- Department of Bio-analytical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-aoba, Aoba-ku, Sendai, Miyagi, 980-8578, Japan.
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123
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Argyropoulos CP, Chen SS, Ng YH, Roumelioti ME, Shaffi K, Singh PP, Tzamaloukas AH. Rediscovering Beta-2 Microglobulin As a Biomarker across the Spectrum of Kidney Diseases. Front Med (Lausanne) 2017; 4:73. [PMID: 28664159 PMCID: PMC5471312 DOI: 10.3389/fmed.2017.00073] [Citation(s) in RCA: 158] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 05/26/2017] [Indexed: 12/28/2022] Open
Abstract
There is currently an unmet need for better biomarkers across the spectrum of renal diseases. In this paper, we revisit the role of beta-2 microglobulin (β2M) as a biomarker in patients with chronic kidney disease and end-stage renal disease. Prior to reviewing the numerous clinical studies in the area, we describe the basic biology of β2M, focusing in particular on its role in maintaining the serum albumin levels and reclaiming the albumin in tubular fluid through the actions of the neonatal Fc receptor. Disorders of abnormal β2M function arise as a result of altered binding of β2M to its protein cofactors and the clinical manifestations are exemplified by rare human genetic conditions and mice knockouts. We highlight the utility of β2M as a predictor of renal function and clinical outcomes in recent large database studies against predictions made by recently developed whole body population kinetic models. Furthermore, we discuss recent animal data suggesting that contrary to textbook dogma urinary β2M may be a marker for glomerular rather than tubular pathology. We review the existing literature about β2M as a biomarker in patients receiving renal replacement therapy, with particular emphasis on large outcome trials. We note emerging proteomic data suggesting that β2M is a promising marker of chronic allograft nephropathy. Finally, we present data about the role of β2M as a biomarker in a number of non-renal diseases. The goal of this comprehensive review is to direct attention to the multifaceted role of β2M as a biomarker, and its exciting biology in order to propose the next steps required to bring this recently rediscovered biomarker into the twenty-first century.
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Affiliation(s)
- Christos P Argyropoulos
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Shan Shan Chen
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Yue-Harn Ng
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Maria-Eleni Roumelioti
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Kamran Shaffi
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Pooja P Singh
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Antonios H Tzamaloukas
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States.,Raymond G. Murphy VA Medical Center Albuquerque, Albuquerque, NM, United States
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124
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Emerging Role of the Spleen in the Pharmacokinetics of Monoclonal Antibodies, Nanoparticles and Exosomes. Int J Mol Sci 2017; 18:ijms18061249. [PMID: 28604595 PMCID: PMC5486072 DOI: 10.3390/ijms18061249] [Citation(s) in RCA: 167] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/02/2017] [Accepted: 06/06/2017] [Indexed: 01/19/2023] Open
Abstract
After being absorbed, drugs distribute in the body in part to reach target tissues, in part to be disposed in tissues where they do not exert clinically-relevant effects. Therapeutically-relevant effects are usually terminated by drug metabolism and/or elimination. The role that has been traditionally ascribed to the spleen in these fundamental pharmacokinetic processes was definitely marginal. However, due to its high blood flow and to the characteristics of its microcirculation, this organ would be expected to be significantly exposed to large, new generation drugs that can hardly penetrate in other tissues with tight endothelial barriers. In the present review, we examine the involvement of the spleen in the disposition of monoclonal antibodies, nanoparticles and exosomes and the possible implications for their therapeutic efficacy and toxicity. The data that we will review lead to the conclusion that a new role is emerging for the spleen in the pharmacokinetics of new generation drugs, hence suggesting that this small, neglected organ will certainly deserve stronger attention by pharmacologists in the future.
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125
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Järnum S, Runström A, Bockermann R, Winstedt L, Crispin M, Kjellman C. Enzymatic Inactivation of Endogenous IgG by IdeS Enhances Therapeutic Antibody Efficacy. Mol Cancer Ther 2017; 16:1887-1897. [DOI: 10.1158/1535-7163.mct-17-0108] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 05/11/2017] [Accepted: 05/19/2017] [Indexed: 11/16/2022]
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126
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Pharmacokinetics, Safety, and Efficacy of Recombinant Factor VIII Fc Fusion Protein: A Practical Review. JOURNAL OF INFUSION NURSING 2017; 40:65-75. [PMID: 28030484 DOI: 10.1097/nan.0000000000000205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Prophylaxis for hemophilia A with conventional factor VIII (FVIII) products requires frequent intravenous dosing, which may reduce adherence. Recombinant factor VIII Fc fusion protein (rFVIIIFc) has a prolonged half-life compared with conventional rFVIII, and has demonstrated safety and efficacy for the prevention and treatment of bleeding episodes in phase 3 studies of patients with severe hemophilia A. Most subjects experienced reduced prophylactic dosing frequency with rFVIIIFc compared with prestudy FVIII; the median total weekly prophylactic consumption was comparable. No subjects developed inhibitors. These results suggest that prophylaxis with rFVIIIFc in patients with hemophilia A may allow less frequent prophylactic dosing while maintaining efficacy, with comparable prophylactic consumption.
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127
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An investigation into the effects of maternal supplementation with excess iodine on the mechanisms and impacts of reduced IgG absorption in the lamb postpartum. Br J Nutr 2017; 117:951-963. [PMID: 28443527 DOI: 10.1017/s0007114517000575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
An experiment was conducted to determine: (1) the effect of excess maternal I supplementation on the thyroid hormone status of the ewe and her progeny; (2) potential mechanisms underpinning the failure of passive transfer associated with excess I and (3) the growing lambs' response to natural gastrointestinal infection. Twin-bearing ewes received one of two treatments (n 32/treatment group): basal diet (C) or C plus 26·6 mg of iodine/ewe per d (I), supplied as calcium iodate. Ewes were individually fed from day 119 of gestation to parturition. Progeny of I ewes had lower (P<0·01) serum IgG concentrations from 24 h to 28 d postpartum but higher serum IgG concentrations at day 70 postpartum (P<0·05). I supplementation increased the relative expression of Fc receptor, IgA, IgM high affinity and polymeric Ig receptor in the ileum of the lamb at 24 h postpartum; however, thyroid hormone receptor-β (THRB) and β-2-microglobulin (B2M) expression declined (P<0·05). Progeny of I ewes had higher growth rates to weaning (P<0·05) and lower faecal egg count (FEC) for Nematodirus battus (P<0·05) between weeks 6 and 10 postpartum. In conclusion, excess maternal I supplementation negatively affected the thyroid hormone status, serum IgG concentration, ileal morphology and the gene expression of THRB and B2M in the ileum and ras-related protein (RAB) RAB25 and the mucin gene (MUC) MUC1 in the duodenum of the lamb postpartum. These effects were followed by an enhancement of average daily gain and lower N. battus FEC in the pre-weaning period of I-supplemented lambs.
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128
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Impact of altered endogenous IgG on unspecific mAb clearance. J Pharmacokinet Pharmacodyn 2017; 44:351-374. [PMID: 28439684 DOI: 10.1007/s10928-017-9524-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Accepted: 04/10/2017] [Indexed: 10/19/2022]
Abstract
Immunodeficient mice are crucial models to evaluate the efficacy of monoclonal antibodies (mAbs). When studying mAb pharmacokinetics (PK), protection from elimination by binding to the neonatal Fc receptor (FcRn) is known to be a major process influencing the unspecific clearance of endogenous and therapeutic IgG. The concentration of endogenous IgG in immunodeficient mice, however is reduced, and this effect on the FcRn protection mechanism and subsequently on unspecific mAb clearance is unknown, yet of great importance for the interpretation of mAb PK data. We used a PBPK modelling approach to elucidate the influence of altered endogenous IgG concentrations on unspecific mAb clearance. To this end, we used PK data in immunodeficient mice, i.e. nude and severe combined immunodeficiency mice. To avoid impact of target-mediated clearance processes, we focussed on mAbs without affinity to a target antigen in these mice. In addition, intravenous immunoglobulin (IVIG) data of immunocompetent mice was used to study the impact of increased total IgG concentrations on unspecific therapeutic antibody clearance. The unspecific clearance is linear, whenever therapeutic IgG concentrations, i.e. mAb and IVIG concentrations are lower than FcRn; it can be non-linear if therapeutic IgG concentrations are larger than FcRn and endogenous IgG concentrations (e.g., under IVIG therapy). Unspecific mAb clearance of immunodeficient mice is effectively linear (under mAb doses as typically used in human). Studying the impact of reduced endogenous IgG concentrations on unspecific mAb clearance is of great relevance for the extrapolation to clinical species, e.g., when predicting mAb PK in immunosuppressed cancer patients.
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129
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Lioger B, Edupuganti SR, Mulleman D, Passot C, Desvignes C, Bejan-Angoulvant T, Thibault G, Gouilleux-Gruart V, Mélet J, Paintaud G, Ternant D. Antigenic burden and serum IgG concentrations influence rituximab pharmacokinetics in rheumatoid arthritis patients. Br J Clin Pharmacol 2017; 83:1773-1781. [PMID: 28230269 DOI: 10.1111/bcp.13270] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 01/12/2017] [Accepted: 01/25/2017] [Indexed: 12/21/2022] Open
Abstract
AIMS Rituximab is a monoclonal antibody directed against CD20, which is approved in rheumatoid arthritis (RA). This study aimed at assessing the influence of CD19+ cell counts as target-antigen amount, and of immunoglobulin G (IgG) serum concentrations on rituximab pharmacokinetics in RA patients. METHODS In a cohort of 64 RA patients who had received repetitive courses of rituximab, the influence of CD19+ cell count, IgG serum concentration, body surface area, sex and disease activity score in 28 joints on rituximab pharmacokinetic parameters was assessed using a population pharmacokinetic analysis. RESULTS A two-compartment model, with first-order distribution and elimination best described the data. The volume of distribution of central compartment and clearance of rituximab were estimated at 4.7 l and 0.56 l day-1 , respectively. Distribution and elimination half-lives were 0.9 days and 17.3 days, respectively. As expected, the central volume of distribution increased with body surface area (P = 0.012) and was higher in male than in female (P = 0.004). We found that the elimination rate constant (k10 ) increased with CD19+ count (P = 0.00022) and IgG concentration (P = 7.4 × 10-8 ), and that k10 decreased with time (P = 0.00015), partly explained by a change in target-antigen amount. CONCLUSIONS The association between CD19+ count and k10 may be explained by target-mediated drug disposition, while the association between IgG serum concentration and k10 may be explained by a saturation of the neonatal Fc receptor at high IgG concentrations, resulting in decreased recycling of rituximab.
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Affiliation(s)
- Bertrand Lioger
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Service de Médecine Interne, CHRU de Tours, Tours, France
| | | | - Denis Mulleman
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Service de Rhumatologie, CHRU de Tours, Tours, France
| | - Christophe Passot
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Laboratoire de Pharmacologie-Toxicologie, CHRU de Tours, Tours, France
| | - Céline Desvignes
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Laboratoire de Pharmacologie-Toxicologie, CHRU de Tours, Tours, France
| | - Théodora Bejan-Angoulvant
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Service de Pharmacologie Clinique, CHRU de Tours, Tours, France
| | - Gilles Thibault
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Laboratoire d'Immunologie, CHRU de Tours, Tours, France
| | - Valérie Gouilleux-Gruart
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Laboratoire d'Immunologie, CHRU de Tours, Tours, France
| | - Julien Mélet
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Service de Rhumatologie, CHRU de Tours, Tours, France
| | - Gilles Paintaud
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Laboratoire de Pharmacologie-Toxicologie, CHRU de Tours, Tours, France
| | - David Ternant
- CNRS, GICC UMR 7292, Université François-Rabelais de Tours, Tours, France.,Laboratoire de Pharmacologie-Toxicologie, CHRU de Tours, Tours, France
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130
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Kendrick F, Evans ND, Arnulf B, Avet-Loiseau H, Decaux O, Dejoie T, Fouquet G, Guidez S, Harel S, Hebraud B, Javaugue V, Richez V, Schraen S, Touzeau C, Moreau P, Leleu X, Harding S, Chappell MJ. Analysis of a Compartmental Model of Endogenous Immunoglobulin G Metabolism with Application to Multiple Myeloma. Front Physiol 2017; 8:149. [PMID: 28367126 PMCID: PMC5355465 DOI: 10.3389/fphys.2017.00149] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 02/24/2017] [Indexed: 12/21/2022] Open
Abstract
Immunoglobulin G (IgG) metabolism has received much attention in the literature for two reasons: (i) IgG homeostasis is regulated by the neonatal Fc receptor (FcRn), by a pH-dependent and saturable recycling process, which presents an interesting biological system; (ii) the IgG-FcRn interaction may be exploitable as a means for extending the plasma half-life of therapeutic monoclonal antibodies, which are primarily IgG-based. A less-studied problem is the importance of endogenous IgG metabolism in IgG multiple myeloma. In multiple myeloma, quantification of serum monoclonal immunoglobulin plays an important role in diagnosis, monitoring and response assessment. In order to investigate the dynamics of IgG in this setting, a mathematical model characterizing the metabolism of endogenous IgG in humans is required. A number of authors have proposed a two-compartment nonlinear model of IgG metabolism in which saturable recycling is described using Michaelis–Menten kinetics; however it may be difficult to estimate the model parameters from the limited experimental data that are available. The purpose of this study is to analyse the model alongside the available data from experiments in humans and estimate the model parameters. In order to achieve this aim we linearize the model and use several methods of model and parameter validation: stability analysis, structural identifiability analysis, and sensitivity analysis based on traditional sensitivity functions and generalized sensitivity functions. We find that all model parameters are identifiable, structurally and taking into account parameter correlations, when several types of model output are used for parameter estimation. Based on these analyses we estimate parameter values from the limited available data and compare them with previously published parameter values. Finally we show how the model can be applied in future studies of treatment effectiveness in IgG multiple myeloma with simulations of serum monoclonal IgG responses during treatment.
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Affiliation(s)
| | - Neil D Evans
- School of Engineering, University of Warwick Coventry, UK
| | | | - Hervé Avet-Loiseau
- Unité de Génomique du Myélome, Institut Universitaire du Cancer de Toulouse Oncopole Toulouse, France
| | - Olivier Decaux
- Centre Hospitalier Universitaire de Rennes Rennes, France
| | - Thomas Dejoie
- Centre Hospitalier Universitaire de Nantes Nantes, France
| | | | | | | | | | | | | | - Susanna Schraen
- Centre Hospitalier Régional Universitaire de Lille Lille, France
| | | | | | - Xavier Leleu
- Centre Hospitalier Universitaire de Poitiers Poitiers, France
| | - Stephen Harding
- Department of Research and Development, The Binding Site Group Limited Birmingham, UK
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131
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Bergström JJE, Xu H, Heyman B. Epitope-Specific Suppression of IgG Responses by Passively Administered Specific IgG: Evidence of Epitope Masking. Front Immunol 2017; 8:238. [PMID: 28321225 PMCID: PMC5337509 DOI: 10.3389/fimmu.2017.00238] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 02/20/2017] [Indexed: 01/03/2023] Open
Abstract
Specific IgG, passively administered together with particulate antigen, can completely prevent induction of antibody responses to this antigen. The ability of IgG to suppress antibody responses to sheep red blood cells (SRBCs) is intact in mice lacking FcγRs, complement factor 1q, C3, or complement receptors 1 and 2, suggesting that Fc-dependent effector functions are not involved. Two of the most widely discussed explanations for the suppressive effect are increased clearance of IgG–antigen complexes and/or that IgG “hides” the antigen from recognition by specific B cells, so-called epitope masking. The majority of data on how IgG induces suppression was obtained through studies of the effects on IgM-secreting single spleen cells during the first week after immunization. Here, we show that IgG also suppresses antigen-specific extrafollicular antibody-secreting cells, germinal center B-cells, long-lived plasma cells, long-term IgG responses, and induction of memory antibody responses. IgG anti-SRBC reduced the amount of SRBC in the spleens of wild-type, but not of FcγR-deficient mice. However, no correlation between suppression and the amount of SRBC in the spleen was observed, suggesting that increased clearance does not explain IgG-mediated suppression. Instead, we found compelling evidence for epitope masking because IgG anti-NP administered with NP-SRBC suppressed the IgG anti-NP, but not the IgG anti-SRBC response. Vice versa, IgG anti-SRBC administered with NP-SRBC, suppressed only the IgG anti-SRBC response. In conclusion, passively transferred IgG suppressed all measured parameters of an antigen-specific antibody/B cell response and an important mechanism of action is likely to be epitope masking.
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Affiliation(s)
- Joakim J E Bergström
- Department of Medical Biochemistry and Microbiology, Uppsala University , Uppsala , Sweden
| | - Hui Xu
- Department of Medical Biochemistry and Microbiology, Uppsala University , Uppsala , Sweden
| | - Birgitta Heyman
- Department of Medical Biochemistry and Microbiology, Uppsala University , Uppsala , Sweden
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132
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Portnoff AD, Gao C, Borrok MJ, Gao X, Gao C, Rainey GJ. An antidote approach to reduce risk and broaden utility of antibody-based therapeutics. J Biol Chem 2017; 292:8498-8506. [PMID: 28258216 PMCID: PMC5437253 DOI: 10.1074/jbc.m117.775528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Revised: 02/24/2017] [Indexed: 02/05/2023] Open
Abstract
Antibody therapeutics offer effective treatment options for a broad range of diseases. One of the greatest benefits of antibody therapeutics is their extraordinarily long serum half-life, allowing infrequent dosing with long-lasting effects. A characteristic of antibodies that drives long half-life is the ability to interact with the recycling receptor, FcRn, in a pH-dependent manner. The benefit of long half-life, however, carries with it liabilities. Although the positive effects of antibody therapeutics are long-lasting, any acute adverse events or chronic negative impacts, such as immunosuppression in the face of an infection, are also long-lasting. Therefore, we sought to develop antibodies with a chemical handle that alone would enjoy the long half-life of normal antibodies but, upon addition of a small-molecule antidote, would interact with the chemical handle and inhibit the antibody recycling mechanism, thus leading to rapid degradation and shortened half-life in vivo Here we present a proof of concept study where we identify sites to incorporate a non-natural amino acid that can be chemically modified to modulate FcRn interaction in vitro and antibody half-life in vivo This is an important first step in developing safer therapeutics, and the next step will be development of technology that can perform the modifying chemistry in vivo.
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Affiliation(s)
| | - Cuihua Gao
- Departments of Antibody Discovery and Protein Engineering
| | - M Jack Borrok
- Departments of Antibody Discovery and Protein Engineering
| | - Xizhe Gao
- Translational Sciences, MedImmune, Gaithersburg, Maryland 20878
| | - Changshou Gao
- Departments of Antibody Discovery and Protein Engineering.
| | - G Jonah Rainey
- Departments of Antibody Discovery and Protein Engineering.
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133
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Lawrence MG, Woodfolk JA, Schuyler AJ, Stillman LC, Chapman MD, Platts-Mills TAE. Half-life of IgE in serum and skin: Consequences for anti-IgE therapy in patients with allergic disease. J Allergy Clin Immunol 2017; 139:422-428.e4. [PMID: 27496596 PMCID: PMC5405770 DOI: 10.1016/j.jaci.2016.04.056] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 04/13/2016] [Accepted: 04/29/2016] [Indexed: 01/08/2023]
Abstract
We present results from clinical studies on plasma infusion done in the late 1970s in patients with hypogammaglobulinemia in which we documented the short half-life of both total and allergen-specific IgE in serum. The development of specific allergic sensitization in the skin of those patients followed by the gradual decrease in sensitization over 50 days was also documented. The data are included here along with a discussion of the existing literature about the half-life of IgE in both the circulation and skin. This rostrum reinterprets the earlier clinical studies in light of new insights and mechanisms that could explain the rapid removal of IgE from the circulation. These mechanisms have clinical implications that relate to the increasing use of anti-IgE mAbs for the treatment of allergic disease.
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Affiliation(s)
- Monica G Lawrence
- University of Virginia Asthma and Allergic Diseases Center, Charlottesville, Va
| | - Judith A Woodfolk
- University of Virginia Asthma and Allergic Diseases Center, Charlottesville, Va
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134
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Lee JU, Shin W, Son JY, Yoo KY, Heo YS. Molecular Basis for the Neutralization of Tumor Necrosis Factor α by Certolizumab Pegol in the Treatment of Inflammatory Autoimmune Diseases. Int J Mol Sci 2017; 18:ijms18010228. [PMID: 28124979 PMCID: PMC5297857 DOI: 10.3390/ijms18010228] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 01/17/2017] [Accepted: 01/17/2017] [Indexed: 12/20/2022] Open
Abstract
Monoclonal antibodies against TNFα, including infliximab, adalimumab, golimumab, and certolizumab pegol, are widely used for the treatment of the inflammatory diseases such as rheumatoid arthritis and inflammatory bowel disease. Recently, the crystal structures of TNFα, in complex with the Fab fragments of infliximab and adalimumab, have revealed the molecular mechanisms of these antibody drugs. Here, we report the crystal structure of TNFα in complex with the Fab fragment of certolizumab pegol to clarify the precise antigen-antibody interactions and the structural basis for the neutralization of TNFα by this therapeutic antibody. The structural analysis and the mutagenesis study revealed that the epitope is limited to a single protomer of the TNFα trimer. Additionally, the DE loop and the GH loop of TNFα play critical roles in the interaction with certolizumab, suggesting that this drug exerts its effects by partially occupying the receptor binding site of TNFα. In addition, a conformational change of the DE loop was induced by certolizumab binding, thereby interrupting the TNFα-receptor interaction. A comprehensive comparison of the interactions of TNFα blockers with TNFα revealed the epitope diversity on the surface of TNFα, providing a better understanding of the molecular mechanism of TNFα blockers. The accumulation of these structural studies can provide a basis for the improvement of therapeutic antibodies against TNFα.
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Affiliation(s)
- Jee Un Lee
- Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Woori Shin
- Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Ji Young Son
- Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Ki-Young Yoo
- Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Yong-Seok Heo
- Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
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135
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Garnier R, Cheung CK, Watt KA, Pilkington JG, Pemberton JM, Graham AL. Joint associations of blood plasma proteins with overwinter survival of a large mammal. Ecol Lett 2017; 20:175-183. [DOI: 10.1111/ele.12719] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 10/31/2016] [Accepted: 11/17/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Romain Garnier
- Department of Ecology and Evolutionary Biology; Princeton University; Princeton NJ USA
| | - Christopher K. Cheung
- Department of Ecology and Evolutionary Biology; Princeton University; Princeton NJ USA
| | - Kathryn A. Watt
- Institute of Evolutionary Biology; School of Biological Sciences; University of Edinburgh; Edinburgh UK
| | - Jill G. Pilkington
- Institute of Evolutionary Biology; School of Biological Sciences; University of Edinburgh; Edinburgh UK
| | - Josephine M. Pemberton
- Institute of Evolutionary Biology; School of Biological Sciences; University of Edinburgh; Edinburgh UK
| | - Andrea L. Graham
- Department of Ecology and Evolutionary Biology; Princeton University; Princeton NJ USA
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136
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Zhao C, Gao Y, Zhao L, Li Y, Zhang Y, Wang S, Zhang H, Lu G, Guo X. The expression and function of the neonatal Fc receptor in thyrocytes of Hashimoto's thyroiditis. Int Immunopharmacol 2017; 44:53-60. [PMID: 28081504 DOI: 10.1016/j.intimp.2016.12.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 12/29/2016] [Accepted: 12/30/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Thyroglobulin (Tg) and thyroid peroxidase (TPO) antibodies (TgAb and TPOAb), which are primarily of the immunoglobulin G (IgG) class, can mediate antibody-dependent cell-mediated cytotoxicity in vitro. However, it is unclear whether any thyrocyte molecules can facilitate the transport and elimination of TgAb and TPOAb. The IgG transport receptor neonatal Fc receptor (FcRn) is a candidate mediator of these processes. In this study, we aimed to evaluate FcRn expression and function in normal and Hashimoto's thyroiditis (HT) thyrocytes. METHODS FcRn expression in primary thyrocyte cultures (four normal and four HT groups) was examined by polymerase chain reaction (PCR) and Western blotting. Localization of FcRn was demonstrated by immunoelectron microscopy. A double immunofluorescence staining method was adopted to detect FcRn and internalized human TgAb IgG. Stimulation experiments were performed to assess the regulation of FcRn expression by T helper cell 1 (Th1) (IFN-γ and TNF-α) and Th2 cytokines (IL-10 and IL-4). RESULTS FcRn expression was lower in HT thyrocytes than in normal thyrocytes. FcRn was located in the cytoplasm, membranes, mitochondria and transport vesicles of thyrocytes. Both human IgG and TgAb IgG were internalized by thyrocytes in a pH-dependent manner and co-localized with FcRn in thyrocytes. FcRn expression was downregulated by Th1 and Th2 cytokines in both normal and HT thyrocytes in a dose-dependent manner. CONCLUSIONS Our results suggest that FcRn may be associated with the transport and metabolism of IgG in thyrocytes and that transport is independent of IgG type. FcRn may be involved in HT pathogenesis.
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Affiliation(s)
- Chenxu Zhao
- Department of Endocrinology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China
| | - Ying Gao
- Department of Endocrinology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China
| | - Lanlan Zhao
- Department of Endocrinology, Civil Aviation General Hospital, No. 1 Gao Jing Jia Street, Chao Yang District, Beijing 100123, China
| | - Yuan Li
- Department of Endocrinology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China
| | - Yang Zhang
- Department of Endocrinology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China.
| | - Suxia Wang
- Department of Pathology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China
| | - Hong Zhang
- Department of Endocrinology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China
| | - Guizhi Lu
- Department of Endocrinology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China
| | - Xiaohui Guo
- Department of Endocrinology, Peking University First Hospital, No. 8 Xi Shi Ku Street, Xi Cheng District, Beijing 100034, China
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137
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Ait-Oudhia S, Ovacik MA, Mager DE. Systems pharmacology and enhanced pharmacodynamic models for understanding antibody-based drug action and toxicity. MAbs 2017; 9:15-28. [PMID: 27661132 PMCID: PMC5240652 DOI: 10.1080/19420862.2016.1238995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 09/02/2016] [Accepted: 09/14/2016] [Indexed: 10/21/2022] Open
Abstract
Pharmacokinetic (PK) and pharmacodynamic (PD) models seek to describe the temporal pattern of drug exposures and their associated pharmacological effects produced at micro- and macro-scales of organization. Antibody-based drugs have been developed for a large variety of diseases, with effects exhibited through a comprehensive range of mechanisms of action. Mechanism-based PK/PD and systems pharmacology models can play a major role in elucidating and integrating complex antibody pharmacological properties, such as nonlinear disposition and dynamical intracellular signaling pathways triggered by ligation to their cognate targets. Such complexities can be addressed through the use of robust computational modeling techniques that have proven powerful tools for pragmatic characterization of experimental data and for theoretical exploration of antibody efficacy and adverse effects. The primary objectives of such multi-scale mathematical models are to generate and test competing hypotheses and to predict clinical outcomes. In this review, relevant systems pharmacology and enhanced PD (ePD) models that are used as predictive tools for antibody-based drug action are reported. Their common conceptual features are highlighted, along with approaches used for modeling preclinical and clinically available data. Key examples illustrate how systems pharmacology and ePD models codify the interplay among complex biology, drug concentrations, and pharmacological effects. New hybrid modeling concepts that bridge cutting-edge systems pharmacology models with established PK/ePD models will be needed to anticipate antibody effects on disease in subpopulations and individual patients.
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Affiliation(s)
- Sihem Ait-Oudhia
- Center for Pharmacometrics and Systems Pharmacology, Department of Pharmaceutics, College of Pharmacy, University of Florida, Orlando, FL, USA
| | - Meric Ayse Ovacik
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Donald E. Mager
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA
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138
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Ferl GZ, Theil FP, Wong H. Physiologically based pharmacokinetic models of small molecules and therapeutic antibodies: a mini-review on fundamental concepts and applications. Biopharm Drug Dispos 2016; 37:75-92. [PMID: 26461173 DOI: 10.1002/bdd.1994] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 08/27/2015] [Accepted: 09/23/2015] [Indexed: 11/07/2022]
Abstract
The mechanisms of absorption, distribution, metabolism and elimination of small and large molecule therapeutics differ significantly from one another and can be explored within the framework of a physiologically based pharmacokinetic (PBPK) model. This paper briefly reviews fundamental approaches to PBPK modeling, in which drug kinetics within tissues and organs are explicitly represented using physiologically meaningful parameters. The differences in PBPK models applied to small/large molecule drugs are highlighted, thus elucidating differences in absorption, distribution and elimination properties between these two classes of drugs in a systematic manner. The absorption of small and large molecules differs with respect to their common extravascular routes of delivery (oral versus subcutaneous). The role of the lymphatic system in drug distribution, and the involvement of tissues as sites of elimination (through catabolism and target mediated drug disposition) are unique features of antibody distribution and elimination that differ from small molecules, which are commonly distributed into the tissues but are eliminated primarily by liver metabolism. Fundamental differences exist in the ability to predict human pharmacokinetics based upon preclinical data due to differing mechanisms governing small and large molecule disposition. These differences have influence on the evolving utilization of PBPK modeling in the discovery and development of small and large molecule therapeutics.
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Affiliation(s)
- Gregory Z Ferl
- Department of Preclinical and Translational Pharmacokinetics, Genentech, Inc., South San Francisco, CA, USA
| | - Frank-Peter Theil
- Non-clinical Development, UCB Pharma S.A., Chemin du Foriest, B-1420, Braine-l'Alleud, Belgium
| | - Harvey Wong
- University of British Columbia, Faculty of Pharmaceutical Sciences, Vancouver, BC, Canada
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139
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Deissler HL, Lang GK, Lang GE. Neonatal Fc receptor FcRn is involved in intracellular transport of the Fc fusion protein aflibercept and its transition through retinal endothelial cells. Exp Eye Res 2016; 154:39-46. [PMID: 27836572 DOI: 10.1016/j.exer.2016.11.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/18/2016] [Accepted: 11/07/2016] [Indexed: 12/15/2022]
Abstract
Retinal endothelial cells (REC) likely contribute to the clearance of intravitreally injected IgG. Because this is of high relevance to the pharmacokinetic assessment of the widely used therapeutic Fc fusion protein aflibercept, we studied its transport through immortalized bovine REC (iBREC) in detail. For shuttling of IgG or Fc fusion proteins like aflibercept, endothelial cells use the highly conserved neonatal Fc receptor (FcRn) also expressed in iBREC where it is down regulated by serum depletion. Therefore, we focused on studying intracellular localization and transport of aflibercept under conditions affecting its interaction with the FcRn. Intracellular localization of aflibercept was assessed by Western-blot analyses of subcellular protein fractions or by immunofluorescence staining. After uptake in a temperature-dependent process, aflibercept co-localized with early endosomes, which harbor FcRn. Similar amounts of aflibercept were co-extracted with proteins from membranes/organelles irrespectively of the amount of FBS in the culture medium. Lowering the concentration of FBS resulted in a strong, but reversible association with cytoskeletal proteins suggesting a block in intracellular transport. In accordance with this finding, aflibercept's transport through an iBREC monolayer grown on porous membrane inserts was markedly delayed in the absence of FBS in the culture medium indicating that aflibercept is taken up but not exocytosed under these conditions. Transcytosis of aflibercept was also strongly delayed by inhibition of phosphatidylinositol 3-kinase with LY294002, which affects FcRn-mediated IgG transport. A similar inhibition of aflibercept's transport was observed with IgG-binding proteins (i.e. protein A or protein G) that block interaction between FcRn and aflibercept. Interfering with aflibercept's binding to the FcRn with protein A (or protein G) or the inhibitory FcRn-specific monoclonal antibody 1G3 resulted in a reduced amount of intracellular aflibercept. Taken together, our results strongly suggest that FcRn is involved in transport of aflibercept through REC in vitro.
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Affiliation(s)
- Heidrun L Deissler
- Department of Ophthalmology, University of Ulm, Prittwitzstrasse 43, 89075 Ulm, Germany.
| | - Gerhard K Lang
- Department of Ophthalmology, University of Ulm, Prittwitzstrasse 43, 89075 Ulm, Germany
| | - Gabriele E Lang
- Department of Ophthalmology, University of Ulm, Prittwitzstrasse 43, 89075 Ulm, Germany
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140
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Victor JR. Allergen-specific IgG as a mediator of allergy inhibition: Lessons from mother to child. Hum Vaccin Immunother 2016; 13:507-513. [PMID: 27808600 PMCID: PMC5360138 DOI: 10.1080/21645515.2016.1244592] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Allergen-specific IgG produced by immune mothers is associated with less predisposition to allergy development in their children. This finding has been described by several groups over the last few decades, but the mechanisms by which maternal IgG can inhibit allergy development are still not fully understood. With the purpose of summarizing past investigations, we review the literature on murine models of maternal immunization with allergens and on immune regulation in humans after passive therapy with purified IgG. Based on our review, a new hypothesis about these mechanisms is presented, which may provide a foundation for the future development of therapies to inhibit allergy development.
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Affiliation(s)
- Jefferson Russo Victor
- a Laboratory of Medical Investigation LIM-56, Division of Clinical Dermatology , Medical School, University of Sao Paulo, Sao Paulo, Brazil; Division of Pathology, Medical School, University of Sao Paulo , Sao Paulo , Brazil
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141
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Gibbs JP, Slatter JG, Egbuna O, Geller M, Hamilton L, Dias CS, Xu RY, Johnson J, Wasserman SM, Emery MG. Evaluation of Evolocumab (AMG 145), a Fully Human Anti-PCSK9 IgG2 Monoclonal Antibody, in Subjects With Hepatic Impairment. J Clin Pharmacol 2016; 57:513-523. [PMID: 27667740 PMCID: PMC5363371 DOI: 10.1002/jcph.832] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 09/22/2016] [Indexed: 11/11/2022]
Abstract
Evolocumab binds PCSK9, increasing low-density lipoprotein cholesterol (LDL-C) receptors and lowering LDL-C. Target-mediated evolocumab elimination is attributable to PCSK9 binding. As circulating PCSK9 and LDL-C levels are primarily regulated by the liver, we compared evolocumab pharmacokinetics, pharmacodynamics, and safety in individuals with and without hepatic impairment. An open-label, parallel-group study evaluated the pharmacokinetics of evolocumab in hepatic-impaired (Child-Pugh Class A or B) or healthy adults. Participants were classified as having no, mild, or moderate hepatic impairment (n = 8/group) and received a single 140-mg evolocumab dose. Assessments of unbound evolocumab and PCSK9 were made predose and postdose. Adverse events were monitored throughout the study. No significant association was observed between baseline PCSK9 and increasing level of hepatic impairment. No difference in extent and time course of PCSK9 or LDL-C reduction was observed despite an apparent decrease in mean unbound evolocumab exposure with increasing hepatic impairment (Jonckheere-Terpstra trend test; maximum serum concentration P = .18; area under the curve P = .09). Maximum reductions were observed in moderately impaired subjects vs healthy individuals: mean maximum serum concentration -34%; mean area under the concentration-time curve (AUC) -47%. On average, unbound PCSK9 serum concentrations fell by >80% at 4 hours after a single evolocumab dose. Mean (95% confidence interval) maximum LDL-C reductions in the healthy, mild, and moderate groups were -57% (-64% to -48%), -70% (-75% to -63%), and -53% (-61% to -43%), respectively. No safety risks were identified. These results support evolocumab use without dose adjustment in patients with active liver disease and mild or moderate hepatic impairment.
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Affiliation(s)
- John P Gibbs
- Medical Sciences, Amgen, Inc., Thousand Oaks, CA, USA.,AbbVie, North Chicago, IL, USA
| | - J Greg Slatter
- Medical Sciences, Amgen, Inc., Thousand Oaks, CA, USA.,Acerta Pharma, Bellevue, WA, USA
| | - Ogo Egbuna
- Medical Sciences, Amgen, Inc., Thousand Oaks, CA, USA
| | | | - Lisa Hamilton
- Biostatistics-Internationals, Amgen, Inc., Uxbridge, UK
| | - Clapton S Dias
- Medical Sciences, Amgen, Inc., Thousand Oaks, CA, USA.,BioMarin Pharmaceutical Inc., San Rafael, CA, USA
| | - Ren Y Xu
- Medical Sciences, Amgen, Inc., Thousand Oaks, CA, USA.,Gilead Science Inc., Foster City, CA, USA
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142
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Green DJ, Bensinger WI, Holmberg LA, Gooley T, Till BG, Budde LE, Pagel JM, Frayo SL, Roden JE, Hedin L, Press OW, Gopal AK. Bendamustine, etoposide and dexamethasone to mobilize peripheral blood hematopoietic stem cells for autologous transplantation in patients with multiple myeloma. Bone Marrow Transplant 2016; 51:1330-1336. [PMID: 27214069 PMCID: PMC5052091 DOI: 10.1038/bmt.2016.123] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 03/23/2016] [Accepted: 03/29/2016] [Indexed: 12/11/2022]
Abstract
Chemotherapeutic agents without cross-resistance to prior therapies may enhance PBSC collection and improve patient outcomes by exacting a more potent direct antitumor effect before autologous stem cell transplant. Bendamustine has broad clinical activity in transplantable lymphoid malignancies, but concern remains over the potential adverse impact of this combined alkylator-nucleoside analog on stem cell mobilization. We performed a prospective, nonrandomized phase II study including 34 patients with multiple myeloma (MM) (n=34; International Staging System (ISS) stages I (35%), II (29%) and III (24%); not scored (13%)) to evaluate bendamustine's efficacy and safety as a stem cell mobilizing agent. Patients received bendamustine (120 mg/m2 IV days 1, 2), etoposide (200 mg/m2 IV days 1-3) and dexamethasone (40 mg PO days 1- 4) (bendamustine, etoposide and dexamethasone (BED)) followed by filgrastim (10 μg/kg/day SC; through collection). All patients (100%) successfully yielded stem cells (median of 21.60 × 106/kg of body weight; range 9.24-55.5 × 106/kg), and 88% required a single apheresis. Six nonhematologic serious adverse events were observed in 6 patients including: neutropenic fever (1, grade 3), bone pain (1, grade 3) and renal insufficiency (1, grade 1). In conclusion, BED safely and effectively mobilizes hematopoietic stem cells.
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Affiliation(s)
- Damian J. Green
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - William I. Bensinger
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Leona A. Holmberg
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Ted Gooley
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Brian G. Till
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Lihua E. Budde
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA, USA
| | - John M. Pagel
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Shani L. Frayo
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Jennifer E. Roden
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Lacey Hedin
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Oliver W. Press
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Ajay K. Gopal
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
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143
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Kelly RL, Yu Y, Sun T, Caffry I, Lynaugh H, Brown M, Jain T, Xu Y, Wittrup KD. Target-independent variable region mediated effects on antibody clearance can be FcRn independent. MAbs 2016; 8:1269-1275. [PMID: 27610650 DOI: 10.1080/19420862.2016.1208330] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
The importance of the neonatal Fc receptor (FcRn) in extending the serum half-life of monoclonal antibodies (mAbs) is well demonstrated, and has led to the development of multiple engineering approaches designed to alter Fc interactions with FcRn. Recent reports have additionally highlighted the effect of nonspecific interactions on antibody pharmacokinetics (PK), suggesting an FcRn-independent mechanism for mAb clearance. In this report we examine a case study of 2 anti-interleukin-12/23 antibodies, ustekinumab and briakinumab, which share the same target and Fc, but differ in variable region sequences. Ustekinumab displayed near baseline signal in a wide range of early stage developability assays for undesirable protein/protein interactions, while briakinumab showed significant propensity for self- and cross-interactions. This phenotypic difference correlates with faster clearance rates for briakinumab in both human FcRn transgenic and FcRn knockout mice. These findings support a dominant contribution for FcRn-independent clearance for antibodies with high nonspecificity, and highlight a key role for early stage developability screening to eliminate clones with such high nonspecific disposition PK.
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Affiliation(s)
- Ryan L Kelly
- a Department of Biological Engineering , Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology , Cambridge , MA , USA
| | - Yao Yu
- b Protein Analytics , Adimab , Lebanon , NH , USA
| | - Tingwan Sun
- b Protein Analytics , Adimab , Lebanon , NH , USA
| | | | | | | | - Tushar Jain
- c Computational Biology , Adimab , Palo Alto , CA , USA
| | - Yingda Xu
- d Department of Chemical Engineering, Koch Institute for Integrative Cancer Research , Massachusetts Institute of Technology , Cambridge , MA , USA
| | - K Dane Wittrup
- a Department of Biological Engineering , Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology , Cambridge , MA , USA.,d Department of Chemical Engineering, Koch Institute for Integrative Cancer Research , Massachusetts Institute of Technology , Cambridge , MA , USA
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144
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Pharmacokinetics interactions of monoclonal antibodies. Pharmacol Res 2016; 111:592-599. [DOI: 10.1016/j.phrs.2016.07.015] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/12/2016] [Accepted: 07/13/2016] [Indexed: 12/27/2022]
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145
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Stapleton NM, Einarsdóttir HK, Stemerding AM, Vidarsson G. The multiple facets of FcRn in immunity. Immunol Rev 2016; 268:253-68. [PMID: 26497526 DOI: 10.1111/imr.12331] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The neonatal Fc receptor, FcRn, is best known for its role in transporting IgG in various tissues, providing newborns with humoral immunity, and for prolonging the half-life of IgG. Recent findings implicate the involvement of FcRn in a far wider range of biological and immunological processes, as FcRn has been found to bind and extend the half-life of albumin; to be involved in IgG transport and antigen sampling at mucosal surfaces; and to be crucial for efficient IgG-mediated phagocytosis. Herein, the function of FcRn will be reviewed, with emphasis on its recently documented significance for IgG polymorphisms affecting the half-life and biodistribution of IgG3, on its role in phagocyte biology, and the subsequent role for the presentation of antigens to lymphocytes.
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Affiliation(s)
- Nigel M Stapleton
- Sanquin Research and Landsteiner Laboratory, Amsterdam Medical Centre, Amsterdam, The Netherlands
| | - Helga K Einarsdóttir
- Sanquin Research and Landsteiner Laboratory, Amsterdam Medical Centre, Amsterdam, The Netherlands
| | | | - Gestur Vidarsson
- Sanquin Research and Landsteiner Laboratory, Amsterdam Medical Centre, Amsterdam, The Netherlands
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146
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Dorokhov YL, Sheshukova EV, Kosobokova EN, Shindyapina AV, Kosorukov VS, Komarova TV. Functional role of carbohydrate residues in human immunoglobulin G and therapeutic monoclonal antibodies. BIOCHEMISTRY (MOSCOW) 2016; 81:835-57. [DOI: 10.1134/s0006297916080058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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147
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Triolo G, Ferrante A, Accardo-Palumbo A, Ciccia F, Cadelo M, Castelli A, Perino A, Licata G. IVIG in APS pregnancy. Lupus 2016; 13:731-5. [PMID: 15485113 DOI: 10.1191/0961203304lu2011oa] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
For more than two decades, the intravenous administration of high doses of IgG pooled from the plasma of healthy donors (immune globulin therapy, also known as ‘IVIG’) has benefited patients with a variety of autoimmune disorders. A potential therapeutic role of IVIG in the prevention of thrombosis and of miscarriages in antiphospholipid syndrome (APS) has been postulated. Multicenter randomized controlled trials attempted to define the role of IVIG in preventing pregnancy complications in APS indicate that simple anticoagulation could not be completely satisfactory, and certain patient subgroups might take advantage of IVIG therapy alone or in combination with heparin.
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Affiliation(s)
- G Triolo
- Sezione di Reumatologia, Dipartimento Biomedico di Medicina Interna e Specialistica, University of Palermo, Palermo, Italy.
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148
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Abstract
The metabolism of radioiodinated mouse IgG was studied in mice with lupus-like syndrome before and after the onset of the disease. Before the onset of the disease, the pharmacokinetic parameters of IgG in MLR-lpr and Pristane-primed Balb/c mice were within the normal range of values. After the onset of the disease a considerable increase in the catabolic rate of IgG was recorded abbreviating its half life to less than one third of the normal value. The increased catabolism of IgG could not be related to the concentration-catabolism effect or to the presence of rheumatoid factor and autoantibody or to the IgG loss through the kidney and gastrointestinal tract. The hypercatabolism of IgG was explained by disease-induced impairment of the function of the receptor FcRn, which regulates the homeostasis of IgG.
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Affiliation(s)
- J Zhou
- Cancer Immunobiology Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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149
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Nikolov N, Reisinger J, Schwarz HP. 10% liquid human immunoglobulin (KIOVIG®) for immunomodulation in autoimmune disorders. Immunotherapy 2016; 8:923-40. [DOI: 10.2217/imt-2016-0041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Intravenous immunoglobulins have been used to treat autoimmune disorders (ADs) for over 50 years. The etiologies of various ADs are not fully understood and although intravenous immunoglobulin treatment has proved its immunomodulatory properties, the roles of proposed mechanisms of action also remain a matter of speculation. A systemic search of the literature regarding KIOVIG® (Baxalta US, Inc., MA, USA) use in clinical trials on patients with ADs and a detailed review of retrieved articles revealed eight relevant publications. These articles reported KIOVIG use in multifocal motor neuropathy, chronic inflammatory demyelinating polyneuropathy, idiopathic thrombocytopenic purpura, Kawasaki disease, Guillain–Barré syndrome and other autoimmune and neurologic disorders and showed that KIOVIG is an effective, safe and well-tolerated treatment in the studied populations. Nevertheless, further studies on larger patient cohorts are needed.
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Affiliation(s)
- Nikolai Nikolov
- Baxalta GmbH, Medical Affairs, Thurgauerstrasse 130, Zurich, Switzerland
| | - Jürgen Reisinger
- Baxalta Innovations GmbH, Clinical Scientific Affairs, Industriestraße 67, 1220, Vienna, Austria
| | - Hans P Schwarz
- Baxalta Innovations GmbH, Immunology, Industriestraße 67, 1220, Vienna, Austria
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150
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Dickinson BL. Unraveling the immunopathogenesis of glomerular disease. Clin Immunol 2016; 169:89-97. [PMID: 27373970 DOI: 10.1016/j.clim.2016.06.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 06/26/2016] [Accepted: 06/28/2016] [Indexed: 02/08/2023]
Abstract
Immune-mediated damage to glomerular structures is largely responsible for the pathology associated with the majority of glomerular diseases. Therefore, a detailed understanding of the basic immune mechanisms responsible for glomerular damage is needed to inform the design of novel intervention strategies. Glomerular injury of immune origin is complex and involves both inflammatory and non-inflammatory processes driven by elements of the innate and adaptive immune system. This review summarizes the basic immune mechanisms that cause glomerular injury leading to the nephritic and nephrotic syndromes. A major focus of the review is to highlight the mechanisms by which antibodies cause glomerular injury through their interactions with glomerular cells, complement proteins, phagocytes bearing complement and Fcγ receptors, and dendritic cells expressing the neonatal receptor for IgG, FcRn.
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Affiliation(s)
- Bonny L Dickinson
- Department of Biomedical Science, Western Michigan University Homer Stryker MD School of Medicine, 1000 Oakland Drive, Kalamazoo, MI 49008, United States.
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