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Misra S, Shukla AK. Teplizumab: type 1 diabetes mellitus preventable? Eur J Clin Pharmacol 2023; 79:609-616. [PMID: 37004543 DOI: 10.1007/s00228-023-03474-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 03/08/2023] [Indexed: 04/04/2023]
Abstract
Type 1 diabetes mellitus (T1DM) is an autoimmune condition driven by T lymphocytes that specifically declines the function of beta cells of pancreas. Immunological treatments aim to stop this decline in β-cell function thus preventing TIDM. Although TIDM occur at any age, it is one of the most common chronic disorders in children. T1DM accounts for 5 to 10% of all cases of diabetes amounting 21-42 million affected persons. Teplizumab is a novel drug recently approved by the US FDA for the treatment of T1DM. This drug reduces abnormal glucose tolerance who are at high risk for developing T1DM and have antibodies suggesting an immunological attack on their pancreas. A 14-day infusion of the drug prevents T cells' attack of the insulin-producing cells of the pancreas. Adverse events due to teplizumab reported so far mild and of limited duration. This review gives an overview of the preclinical and clinical research on teplizumab for their role in new-onset T1DM.
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Affiliation(s)
- Saurav Misra
- Department of Pharmacology, Kalpana Chawla Government Medical College, Karnal, Haryana, India.
| | - Ajay Kumar Shukla
- Department of Pharmacology, AIIMS Bhopal, Bhopal, Madhya Pradesh, India
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2
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Yang Z, Nicholson SE, Cancio TS, Cancio LC, Li Y. Complement as a vital nexus of the pathobiological connectome for acute respiratory distress syndrome: An emerging therapeutic target. Front Immunol 2023; 14:1100461. [PMID: 37006238 PMCID: PMC10064147 DOI: 10.3389/fimmu.2023.1100461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/27/2023] [Indexed: 03/19/2023] Open
Abstract
The hallmark of acute respiratory distress syndrome (ARDS) pathobiology is unchecked inflammation-driven diffuse alveolar damage and alveolar-capillary barrier dysfunction. Currently, therapeutic interventions for ARDS remain largely limited to pulmonary-supportive strategies, and there is an unmet demand for pharmacologic therapies targeting the underlying pathology of ARDS in patients suffering from the illness. The complement cascade (ComC) plays an integral role in the regulation of both innate and adaptive immune responses. ComC activation can prime an overzealous cytokine storm and tissue/organ damage. The ARDS and acute lung injury (ALI) have an established relationship with early maladaptive ComC activation. In this review, we have collected evidence from the current studies linking ALI/ARDS with ComC dysregulation, focusing on elucidating the new emerging roles of the extracellular (canonical) and intracellular (non-canonical or complosome), ComC (complementome) in ALI/ARDS pathobiology, and highlighting complementome as a vital nexus of the pathobiological connectome for ALI/ARDS via its crosstalking with other systems of the immunome, DAMPome, PAMPome, coagulome, metabolome, and microbiome. We have also discussed the diagnostic/therapeutic potential and future direction of ALI/ARDS care with the ultimate goal of better defining mechanistic subtypes (endotypes and theratypes) through new methodologies in order to facilitate a more precise and effective complement-targeted therapy for treating these comorbidities. This information leads to support for a therapeutic anti-inflammatory strategy by targeting the ComC, where the arsenal of clinical-stage complement-specific drugs is available, especially for patients with ALI/ARDS due to COVID-19.
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Affiliation(s)
- Zhangsheng Yang
- Combat Casualty Care Research Team (CRT) 3, United States (US) Army Institute of Surgical Research, Joint Base San Antonio (JBSA)-Fort Sam Houston, TX, United States
| | - Susannah E. Nicholson
- Division of Trauma Research, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Tomas S. Cancio
- Combat Casualty Care Research Team (CRT) 3, United States (US) Army Institute of Surgical Research, Joint Base San Antonio (JBSA)-Fort Sam Houston, TX, United States
| | - Leopoldo C. Cancio
- United States (US) Army Burn Center, United States (US) Army Institute of Surgical Research, Joint Base San Antonio (JBSA)-Fort Sam Houston, TX, United States
| | - Yansong Li
- Division of Trauma Research, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
- The Geneva Foundation, Immunological Damage Control Resuscitation Program, Tacoma, WA, United States
- *Correspondence: Yansong Li,
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3
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Barnum SR, Bubeck D, Schein TN. Soluble Membrane Attack Complex: Biochemistry and Immunobiology. Front Immunol 2020; 11:585108. [PMID: 33240274 PMCID: PMC7683570 DOI: 10.3389/fimmu.2020.585108] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/14/2020] [Indexed: 12/15/2022] Open
Abstract
The soluble membrane attack complex (sMAC, a.k.a., sC5b-9 or TCC) is generated on activation of complement and contains the complement proteins C5b, C6, C7, C8, C9 together with the regulatory proteins clusterin and/or vitronectin. sMAC is a member of the MACPF/cholesterol-dependent-cytolysin superfamily of pore-forming molecules that insert into lipid bilayers and disrupt cellular integrity and function. sMAC is a unique complement activation macromolecule as it is comprised of several different subunits. To date no complement-mediated function has been identified for sMAC. sMAC is present in blood and other body fluids under homeostatic conditions and there is abundant evidence documenting changes in sMAC levels during infection, autoimmune disease and trauma. Despite decades of scientific interest in sMAC, the mechanisms regulating its formation in healthy individuals and its biological functions in both health and disease remain poorly understood. Here, we review the structural differences between sMAC and its membrane counterpart, MAC, and examine sMAC immunobiology with respect to its presence in body fluids in health and disease. Finally, we discuss the diagnostic potential of sMAC for diagnostic and prognostic applications and potential utility as a companion diagnostic.
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Affiliation(s)
| | - Doryen Bubeck
- Department of Life Sciences, Imperial College London, London, United Kingdom
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Vudattu NK, Herold KC. Treatment of new onset type 1 diabetes with teplizumab: successes and pitfalls in development. Expert Opin Biol Ther 2015; 14:377-85. [PMID: 24517093 DOI: 10.1517/14712598.2014.881797] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
INTRODUCTION Type 1 diabetes is an organ-specific autoimmune disease, characterized by selective destruction of insulin-producing pancreatic β-cells by T-cell-mediated inflammation. Beginning with studies of cyclosporin A in the 1980s, but with more activity in the past decade, there have been a number of clinical trials to test whether immunotherapies can arrest the decline in C-peptide, which is associated with progression of type 1 diabetes leading to the metabolic instability that characterizes the disease. One of the most promising agents, teplizumab , is an FcR-nonbinding anti-CD3 monoclonal antibody that has been tested in Phase II - III clinical trials and was shown to preserve the C-peptide levels and reduce the need for exogenous insulin. AREAS COVERED In this review, we discuss the recent update on clinical data obtained from trials of teplizumab in type 1 diabetes, the drug's postulated mechanism of action and the identification of responders to therapy. We highlight the results of recent trials as well as the lessons that have been learned from the clinical trials involving selection of end points and the inclusion of diverse study populations. EXPERT OPINION Teplizumab has been shown to preserve β cell function in patients; however, it does not represent a 'cure' for patients, and its efficacy does entail a significant advance in arresting the progression of the disease toward complete insulin deficiency and reliance on exogenous insulin.
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Affiliation(s)
- Nalini K Vudattu
- Yale University, Department of Immunobiology and Internal Medicine , 300 George St, #353E, New Haven, CT 06520 , USA +1 203 785 6507 ;
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Page E, Kwun J, Oh B, Knechtle S. Lymphodepletional strategies in transplantation. Cold Spring Harb Perspect Med 2013; 3:3/7/a015511. [PMID: 23818516 DOI: 10.1101/cshperspect.a015511] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Because lymphocytes were shown to mediate transplant rejection, their depletion has been studied as a mechanism of preventing rejection and perhaps inducing immunologic tolerance. Agents that profoundly deplete lymphocytes have included monoclonal antibodies, cytotoxic drugs, and radiation. We have studied several such agents but focused on antibodies that deplete not only peripheral blood lymphocytes, but also lymph node lymphocytes. Depletion of lymph node T lymphocytes appears to permit peripheral tolerance at least for T cells in animal models. Nevertheless, B-cell responses may be resistant to such approaches, and T memory cells are likewise relatively resistant to depleting antibodies. We review the experimental and clinical approaches to depletion strategies and outline some of the pitfalls of depletion, such as limitations of currently available agents, duration of tolerance, infection, and malignancy. It is notable that most tolerogenic strategies that have been attempted experimentally and clinically include depleting agents even when they are not named as the underlying strategy. Thus, there is an implicitly acknowledged role for reducing the precursor frequency of donor antigen-specific lymphocytes when approaching the daunting goal of transplant tolerance.
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Affiliation(s)
- Eugenia Page
- Department of Surgery, Division of Transplantation, Emory University School of Medicine, Atlanta, Georgia 30322, USA
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Loubaki L, Tremblay T, Bazin R. In vivo depletion of leukocytes and platelets following injection of T cell-specific antibodies into mice. J Immunol Methods 2013; 393:38-44. [PMID: 23597928 DOI: 10.1016/j.jim.2013.04.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 03/20/2013] [Accepted: 04/08/2013] [Indexed: 12/23/2022]
Abstract
In vivo T cell depletion experiments are widely used to establish the role of these cells in a variety of immunological processes. Different clones of monoclonal antibody targeting the CD3 molecular complex (mainly 145-2C11 and 17A2) have been successfully used for T cell depletion. In the present work, we assessed the specificity of monoclonal antibody-mediated CD3 T cell depletion in mouse peripheral blood. We showed that treatment of BALB/C mice with monoclonal antibodies (clones 145-2C11 and 17A2) not only efficiently depletes T cells in vivo, but also leads to a substantial reduction in B cell, granulocyte and platelet counts. In contrast, T cell depletion using a combination of anti-CD4 and anti-CD8 antibodies was efficient and produced less deleterious effects on other blood cell populations. Therefore, the results obtained from T cell depletion experiments using anti-CD3 antibodies must be interpreted with caution prior to draw definitive conclusions on the role of T cells in a given immunological process.
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Affiliation(s)
- Lionel Loubaki
- Department of Research and Development, Héma-Québec, Quebec G1V 5C3, Canada.
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Modifiers of complement activation for prevention of antibody-mediated injury to allografts. Curr Opin Organ Transplant 2011; 16:425-33. [PMID: 21681097 DOI: 10.1097/mot.0b013e3283489a5a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
PURPOSE OF REVIEW Improvements in prevention and management of cellular rejection of solid organ transplants, coupled with increasing numbers of sensitized patients, have focused attention on antibody-mediated rejection (AbMR). Complement is a critical component of AbMR, in addition to interfacing between innate and adaptive immunity and the coagulation cascade. This article reviews complement biology and strategies to overcome complement in AbMR, cognisant that antibody can act independently of complement. RECENT FINDINGS The past decade has witnessed an improvement in the prevention and treatment of AbMR as a result of solid-phase assays to determine antibody specificity, definition of histopathological criteria, and use of plasmapheresis and/or intravenous immunoglobulin (IVIG). Nonetheless, AbMR continues to impact adversely on short- and long-term graft survival. Use of B and/or T-lymphocyte-depleting therapies has not shown measurable benefit, and the need remains for therapies that deplete antibody, or provide better protection from complement-mediated damage. Disordered complement activity in human diseases such as paroxysmal nocturnal haemoglobinuria, has provided additional impetus to pursuing therapeutic complement inhibition. Preliminary data from C5 inhibition with eculizumab in the treatment and prevention of AbMR have shown promise. Trials with recombinant human inhibitors of C1 (effective in angioedema) to prevent or treat AbMR are beginning. SUMMARY Despite current limitations, 'protection' of the transplant through plasmapheresis and/or IVIG enables many allografts to survive in sensitized recipients. Elucidating the pathways mediating graft acceptance, by constitutive antibody deletion, or 'accommodation' (wherein donor organ remains uninjured despite antibody binding), or other local protective mechanism(s), is an equally important challenge in the quest to overcome AbMR.
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Mahmud N, Klipa D, Ahsan N. Antibody immunosuppressive therapy in solid-organ transplant: Part I. MAbs 2011; 2:148-56. [PMID: 20150766 DOI: 10.4161/mabs.2.2.11159] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Currently, a wide variety of both polyclonal and monoclonal antibodies are being routinely utilized to prevent and treat solid organ rejection. More commonly, these agents are also administered in order to delay introduction of calcineurin inhibitors, especially in patients with already compromised renal function. While these antibody therapies dramatically reduced the incidence of acute rejection episodes and improved both short and long-term graft survival, they are also associated with an increased incidence of opportunistic infections and neoplastic complications. Therefore, effective patient management must necessarily balance these risks against the potential benefits of the therapy.
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Chamberlain P. Pre-clinical strategies and safety issues in developing therapeutic monoclonal antibodies. N Biotechnol 2011; 28:481-8. [PMID: 21473945 DOI: 10.1016/j.nbt.2011.03.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Although mAbs present a different set of challenges from other product classes, and the pre-clinical safety evaluation may need to be more extensive than for other medicinal products to overcome the limited predictive value of conventional pre-clinical test systems, the level of risk associated with first administration to human subjects can be effectively mitigated. This article seeks to provide a systematic approach to identifying and addressing the pertinent risks relative to the characteristics of the particular mAb product before the first administration to human subjects.
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10
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Controversies in defining cardiac antibody-mediated rejection: Need for updated criteria. J Heart Lung Transplant 2010; 29:389-94. [DOI: 10.1016/j.healun.2009.10.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Revised: 10/27/2009] [Accepted: 10/27/2009] [Indexed: 11/19/2022] Open
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Abstract
Continued advances in surgical techniques and immunosuppressive therapy have allowed liver transplantation to become an extremely successful treatment option for patients with end-stage liver disease. Beginning with the revolutionary discovery of cyclosporine in the 1970s, immunosuppressive regimens have evolved greatly and current statistics confirm one-year graft survival rates in excess of 80%. Immunosuppressive regimens include calcineurin inhibitors, anti-metabolites, mTOR inhibitors, steroids and antibody-based therapies. These agents target different sites in the T cell activation cascade, usually by inhibiting T cell activation or via T cell depletion. They are used as induction therapy in the immediate peri- and post-operative period, as long-term maintenance medications to preserve graft function and as salvage therapy for acute rejection in liver transplant recipients. This review will focus on existing immunosuppressive agents for liver transplantation and consider newer medications on the horizon.
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12
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The use of C3d and C4d immunohistochemistry on formalin-fixed tissue as a diagnostic adjunct in the assessment of inflammatory skin disease. J Am Acad Dermatol 2009; 59:822-33. [PMID: 19119098 DOI: 10.1016/j.jaad.2008.06.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2008] [Revised: 06/03/2008] [Accepted: 06/13/2008] [Indexed: 11/23/2022]
Abstract
BACKGROUND Direct immunofluorescent (DIF) testing defines an important diagnostic adjunct in the classification of various inflammatory skin conditions; it requires fresh tissue, a laboratory equipped to perform the procedure, and a pathologist skilled in its interpretation. Although advances have been made in the development of antibodies that can be applied to paraffin-embedded tissue, there has been no reported success on the application of paraffin tissue-based immunohistochemistry as a potential substitute for DIF testing on skin biopsy material. OBJECTIVE We applied C3d and C4d immunohistochemistry on paraffin-embedded, formalin-fixed tissue to define a potential application of these two antibodies as a diagnostic adjunct in the evaluation of various inflammatory skin diseases. DESIGN A natural language search identified cases submitted for both light microscopic and DIF studies from July 2006 to August 2007. We prospectively included similar cases encountered from August 2007 to March 2008. We correlated the C3d and C4d staining pattern with the DIF and light microscopic findings. RESULTS All cases of scarring discoid lupus erythematosus (LE) (20/20) and systemic LE (5/5) showed prominent granular C3d along the dermoepidermal junction (DEJ) and a positive lupus band test result in the latter by DIF. All systemic LE cases demonstrated granular DEJ C4d with C3d or C4d in blood vessels (BV). There was a negative lupus band test result without DEJ C3d or C4d in all cases of subacute cutaneous lupus erythematosus (SCLE) (15/15). There were, however, deposits of C4d within epidermal keratinocytes (7/7), corresponding to IgG decoration of keratinocytes by DIF and the presence of anti-Ro antibodies. Dermatomyositis cases showed prominent mural C3d and C4d in BV corresponding to C5b-9 by DIF (12/12) and one case of hydroxyurea-induced dermatomyositis lacked this staining. Although by DIF all dermatomyositis cases had a negative lupus band test result, 25% of cases showed staining for C3d along the DEJ (3/9). Bullous pemphigoid cases demonstrated homogenous DEJ C3d (17/17) whereas C4d was characteristically negative; there was 100% concordance with linear IgG and C3d by DIF. Eighty two percent of pemphigus cases demonstrated prominent intercellular C3d and C4d, roughly mirroring the intercellular pattern for IgG and complement seen by DIF (9/11). Porphyria cases showed homogeneous and granular C3d (11/11) and C4d (7/11), mirroring the vascular immunoglobulin and C5b-9 by DIF. All cases of urticarial (5), leukocytoclastic (6), and lymphocytic (1) vasculitis exhibited prominent mural C3d and C4d in BV, whereas Henoch-Schönlein purpura (10/10) showed primarily mural BV C3d without C4d, with IgA by DIF. Three cases of relapsing polychondritis showed C3d and C4d within chondrocyte nuclei (3/3), in contrast to negative staining in chondrodermatitis nodularis helicis (0/2). Hypersensitivity reactions were negative for C3d and C4d. LIMITATIONS The small sample size in each category is a limitation. The lack of literature precedent with regard to immunohistochemical assessment of extracellular antigens on paraffin-embedded tissue in skin samples is another limitation of this study. CONCLUSIONS When correlated with the light microscopic and clinical findings, the C3d and C4d assay has significant application in the assessment of select inflammatory skin diseases including vasculopathic conditions, collagen vascular disease, and autoimmune vesiculobullous disorder. It may prompt further DIF testing or, in some instances, may even define a reasonable substitute for DIF and/or add to the morphologic assessment of a biopsy specimen submitted for routine light microscopic assessment primarily in the setting of autoimmune vesiculobullous disease and collagen vascular disease.
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Dall'Acqua WF, Cook KE, Damschroder MM, Woods RM, Wu H. Modulation of the effector functions of a human IgG1 through engineering of its hinge region. THE JOURNAL OF IMMUNOLOGY 2006; 177:1129-38. [PMID: 16818770 DOI: 10.4049/jimmunol.177.2.1129] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We report here the engineering of a humanized anti-human EphA2 mAb (mAb 12G3H11) in an effort to explore the relationship between the hinge of a human IgG1 and its effector functions. mAb 12G3H11, used here as a model, is directed against the human receptor tyrosine kinase EphA2, which is an actively investigated target for cancer therapy due to its up-regulation in many cancer cells. Various rational modifications were introduced into the hinge region of mAb 12G3H11. These mutations were predicted to modulate the hinge's length, flexibility, and/or biochemical properties. We show that the upper and middle hinge both play important, although functionally distinct roles. In particular, middle hinge modifications predicted to decrease its rigidity or length as well as eliminating either one of its two cysteine residues had a strong negative impact on C1q binding and complement-dependent cytotoxicity. Disruption of covalent bonds between both H chains may account in part for these effects. We also describe middle hinge mutants with a significantly decreased ability to bind FcgammaRIIIA and trigger Ab-dependent cell-mediated cytotoxicity. Conversely, we also generated upper hinge mutants exhibiting an increase in C1q binding and complement-dependent cytotoxicity activity. Therefore, this approach represents a novel strategy to fine-tune the biological activity of a given human IgG1. We also define, for the first time in such a systematic fashion, the relationship between various characteristics of the middle and upper hinge and the corresponding effector functions.
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Affiliation(s)
- William F Dall'Acqua
- Department of Antibody Discovery and Protein Engineering, MedImmune, One MedImmune Way, Gaithersburg, MD 20878, USA.
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14
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Dall'Acqua WF, Kiener PA, Wu H. Properties of human IgG1s engineered for enhanced binding to the neonatal Fc receptor (FcRn). J Biol Chem 2006; 281:23514-24. [PMID: 16793771 DOI: 10.1074/jbc.m604292200] [Citation(s) in RCA: 431] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We describe here the functional implications of an increase in IgG binding to the neonatal Fc receptor. We have defined in a systematic fashion the relationship between enhanced FcRn binding of a humanized anti-respiratory syncytial virus (RSV) monoclonal antibody (MEDI-524) and the corresponding biological consequences in cynomolgus monkeys. The triple mutation M252Y/S254T/T256E (YTE) was introduced into the Fc portion of MEDI-524. Whereas these substitutions did not affect the ability of MEDI-524 to bind to its cognate antigen and inhibit RSV replication, they resulted in a 10-fold increase in its binding to both cynomolgus monkey and human FcRn at pH 6.0. MEDI-524-YTE was efficiently released from FcRn at pH 7.4 in both cases. We show that MEDI-524-YTE consistently exhibited a nearly 4-fold increase in serum half-life in cynomolgus monkeys when compared with MEDI-524. This constituted the largest half-life improvement described to date for an IgG in a primate. For the first time, we demonstrate that these sustained serum levels resulted in an up to 4-fold increase in lung bioavailability. Importantly, we also establish that our non-human primate model is relevant to human. Finally, we report that the YTE triple substitution provided a means to modulate the antibody-dependent cell-mediated cytotoxicity (ADCC) activity of a humanized IgG1 directed against the human integrin alpha(v)beta3. Therefore, the YTE substitutions allow the simultaneous modulation of serum half-life, tissue distribution and activity of a given human IgG1.
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MESH Headings
- Animals
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/blood
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/metabolism
- Antibodies, Monoclonal, Humanized
- Antibody Diversity
- Antibody-Dependent Cell Cytotoxicity
- Binding Sites, Antibody
- Half-Life
- Histocompatibility Antigens Class I/blood
- Histocompatibility Antigens Class I/metabolism
- Humans
- Immunoglobulin G/administration & dosage
- Immunoglobulin G/blood
- Immunoglobulin G/chemistry
- Immunoglobulin G/metabolism
- Macaca fascicularis
- Organ Specificity
- Protein Binding
- Protein Engineering/methods
- Receptors, Fc/blood
- Receptors, Fc/metabolism
- Receptors, IgG/metabolism
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Affiliation(s)
- William F Dall'Acqua
- Department of Antibody Discovery and Protein Engineering, MedImmune, Inc., Gaithersburg, Maryland 20878, USA. dall'
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Abstract
Rituximab, a humanized monoclonal antibody approved for malignant lymphoma, is being increasingly, effectively, and safely used for immune thrombocytopenic purpura (ITP) and other humoral autoimmune disorders. We report the case of a 43-year-old man with ITP refractory to steroids and intravenous immunoglobulin who developed acute respiratory distress syndrome (ARDS) after a single infusion of rituximab. Dyspnea, hypoxemia, and pleuritic chest pain occurred within 24 hours of rituximab administration, and there was no other apparent explanation. Progressive hypoxemia mandated endotracheal intubation 1 week after rituximab administration and led to death 4 weeks after admission. ARDS has been associated with the administration of other monoclonal antibodies, such as infliximab, gemtuzumab ozogamicin, and OKT3 and is believed to be directly mediated by release of proinflammatory cytokines. ARDS is rarely associated with rituximab infusion for lymphoproliferative disorders, but it should be considered by those administering rituximab, especially when a patient develops severe pulmonary symptoms soon after infusion.
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Affiliation(s)
- Alberto J. Montero
- Section of Hematology/Oncology, Baylor College of Medicine, 6565 Fannin, Mail Sta 902, 77030 Houston, Texas USA
| | - John J. McCarthy
- Section of Hematology/Oncology, Baylor College of Medicine, 6565 Fannin, Mail Sta 902, 77030 Houston, Texas USA
| | - George Chen
- Section of Hematology/Oncology, Baylor College of Medicine, 6565 Fannin, Mail Sta 902, 77030 Houston, Texas USA
| | - Lawrence Rice
- Section of Hematology/Oncology, Baylor College of Medicine, 6565 Fannin, Mail Sta 902, 77030 Houston, Texas USA
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Taylor AL, Watson CJE, Bradley JA. Immunosuppressive agents in solid organ transplantation: Mechanisms of action and therapeutic efficacy. Crit Rev Oncol Hematol 2005; 56:23-46. [PMID: 16039869 DOI: 10.1016/j.critrevonc.2005.03.012] [Citation(s) in RCA: 294] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2004] [Revised: 02/25/2005] [Accepted: 03/04/2005] [Indexed: 01/09/2023] Open
Abstract
Effective immunosuppression is an essential pre-requisite for successful organ transplantation and improvements in outcome after transplantation have to a large extent been dependent on developments in immunosuppressive therapy. Here we provide an overview of the different immunosuppressive agents currently used in solid organ transplantation. A historical perspective on the development of immunosuppression for organ transplantation is followed by a review of the individual agents, with a focus on their mechanism of action and efficacy. Steroids, anti-proliferative agents (azathioprine and mycophenolate), calcineurin inhibitors (cyclosporine and tacrolimus) and TOR inhibitors (sirolimus and everolimus) are discussed along with both polyclonal and monoclonal antibody preparations. Many of the key clinical trials that underpin current clinical usage of these agents are described and side-effects of the different agents are highlighted. Finally, a number of newer agents still in various stages of clinical development are briefly considered.
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Affiliation(s)
- Anna L Taylor
- University of Cambridge, Department of Surgery, Box 202, Addenbrookes, Hospital, Hills Road, Cambridge CB2 2QQ, UK
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17
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Wilkes DS, Egan TM, Reynolds HY. Lung transplantation: opportunities for research and clinical advancement. Am J Respir Crit Care Med 2005; 172:944-55. [PMID: 16020804 PMCID: PMC2718411 DOI: 10.1164/rccm.200501-098ws] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Lung transplantation is the only definitive therapy for many forms of end-stage lung diseases. However, the success of lung transplantation is limited by many factors: (1) Too few lungs available for transplantation due to limited donors or injury to the donor lung; (2) current methods of preservation of excised lungs do not allow extended periods of time between procurement and implantation; (3) acute graft failure is more common with lungs than other solid organs, thus contributing to poorer short-term survival after lung transplant compared with that for recipients of other organs; (4) lung transplant recipients are particularly vulnerable to pulmonary infections; and (5) chronic allograft dysfunction, manifest by bronchiolitis obliterans syndrome, is frequent and limits long-term survival. Scientific advances may provide significant improvements in the outcome of lung transplantation. The National Heart, Lung, and Blood Institute convened a working group of investigators on June 14-15, 2004, in Bethesda, Maryland, to identify opportunities for scientific advancement in lung transplantation, including basic and clinical research. This workshop provides a framework to identify critical issues related to clinical lung transplantation, and to delineate important areas for productive scientific investigation.
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Affiliation(s)
- David S Wilkes
- Indiana University School of Medicine, Indianapolis, Indiana, USA
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Abstract
The introduction of OKT3 (muromonab-CD3) revolutionized the management of steroid-resistant rejection in transplant patients. Indeed, after the success of OKT3 for treatment of rejection, some centers used OKT3 for perioperative prophylaxis against rejection after transplantation. Despite the success of this agent for prevention and treatment of rejection, its use is associated with side effects. These side effects, including the cytokine release syndrome and flash pulmonary edema, are well recognized in the transplant community. However, there have been no published reports of acute severe hepatitis associated with the use of OKT3 in non-liver transplant patients. We describe here a case of acute severe hepatitis encountered during treatment of acute renal allograft rejection with OKT3 in a 31-year-old black man.
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Affiliation(s)
- Michael R Go
- Department of Surgery, The Ohio State University Medical Center, Columbus, Ohio 43210-1250, USA
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Choi I, Schmitt WE, Bähre A, Little M, Cochlovius B. Recombinant chimeric OKT3/IgM antibodies for immune suppression: evaluation in a human CD3 transgenic mouse model. Immunol Lett 2002; 80:125-8. [PMID: 11750044 DOI: 10.1016/s0165-2478(01)00302-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
ScOKT3-gammaDeltaIgM VAEVD is a recombinant chimeric anti-CD3 antibody variant consisting of the light and heavy variable binding domains of the OKT3 monoclonal antibody and the CH3 and CH4 domains of a human IgM mutation linked by a human IgG3 hinge region. Due to the IgM Fc domains, scOKT3-gammaDeltaIgM VAEVD antibodies are able to form polymeric structures. Independent of their polymerization state, they possess in vitro CD3 modulating and immunosuppressive properties while inducing only minimal T cell activation compared to their monoclonal counterpart. To evaluate the in vivo efficacy of the antibodies, an adjuvant-induced chronic inflammation was established in human CD3 transgenic mice. Administration of four doses of 15 microg of isolated scOKT3-gammaDeltaIgM VAEVD monomers and pentamers significantly reduced diameters of inflamed ankle joints in a manner comparable to the monoclonal antibody OKT3. Additionally, the antibody treatment lead to a significant reduction of the cytokine levels (IL-2, TNF-alpha and INF-gamma) in the mice's sera. These results suggest that scOKT3-gammaDeltaIgM VAEVD antibodies may provide a useful alternative to the OKT3 mAb for clinical immunosuppressive treatment for auto-aggressive diseases or for organ-transplantation.
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Affiliation(s)
- Ingrid Choi
- Recombinant Antibody Research Group, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
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Vallhonrat H, Williams WW, Dec GW, Keck S, Schoenfeld D, Cosimi AB, Pascual M. Complement activation products in plasma after heart transplantation in humans. Transplantation 2001; 71:1308-11. [PMID: 11397968 DOI: 10.1097/00007890-200105150-00022] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Complement activation has recently been implicated as a contributing factor to early and late allograft dysfunction in cardiac transplantation. The current study was designed to determine whether measurement of plasma complement fragments C4d and SC5b-9 would be useful in detecting acute rejection or accelerated graft atherosclerosis (AGA) in cardiac allograft recipients. METHODS We measured complement activation products, C4d (classical pathway) and SC5b-9 (terminal pathway), at the time of routine endomyocardial biopsy in heart transplant recipients. Ten patients in the immediate posttransplantation period (0-100 days) and 19 patients more than 6 months after transplantation were studied. RESULTS No correlation was found between plasma levels of complement activation fragments and the presence of biopsy-proven acute allograft rejection or AGA (assessed by coronary angiography). However, plasma C4d and SC5b-9 were significantly elevated in 9 of 10 and 7 of 10 patients, respectively, in the immediate posttransplantation period. This was followed by progressive decrease in the levels of C4d and SC5b-9 fragments during the first 4-6 weeks after transplantation. CONCLUSION We conclude that measuring plasma levels of fragments C4d and SC5b-9 is not a useful noninvasive method for detecting acute rejection or AGA after heart transplantation. However, this study provides further evidence that early complement activation after heart transplantation may play a pathogenic role in allograft injury.
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Affiliation(s)
- H Vallhonrat
- Renal Unit, Massachusetts General Hospital, Boston 02114, USA
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Choi I, De Ines C, Kürschner T, Cochlovius B, Sörensen V, Olafsen T, Sandlie I, Little M. Recombinant chimeric OKT3 scFv IgM antibodies mediate immune suppression while reducing T cell activationin vitro. Eur J Immunol 2001. [DOI: 10.1002/1521-4141(200101)31:1<94::aid-immu94>3.0.co;2-j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Baldwin WM, Qian Z, Ota H, Samaniego M, Wasowska B, Sanfilippo F, Hruban RH. Complement as a mediator of vascular inflammation and activation in allografts. J Heart Lung Transplant 2000; 19:723-30. [PMID: 10967264 DOI: 10.1016/s1053-2498(00)00137-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- W M Baldwin
- Department of Pathology, The Johns Hopkins University, Baltimore, Maryland 21205-2196, USA
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Abstract
The therapeutic potential of monoclonal antibodies (mAb) was quickly realised after the hybridoma technique allowed their development in the mid 1970s. Chimeric humanised and fully humanised mAb can now be made by recombinant engineering. About a quarter of all biotech drugs in development are mAb, and around 30 products are in use or being investigated. Licensed products are available for inhibition of alloimmune and autoimmune reactivity, and for antitumour, antiplatelet, or antiviral therapy. Short-term side-effects are tolerable and as expected, although long-term safety remains to be elucidated. The cost-effectiveness and quality-of-life benefits of the use of mAb in patients who are usually seriously and chronically ill also needs studying. The therapeutic use of mAb is now established, and is perhaps the first example of how the "new biology" and the understanding of underlying molecular mechanisms has benefited patients.
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Affiliation(s)
- F C Breedveld
- Department of Rheumatology, Leiden University Medical Center, The Netherlands.
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Xu D, Alegre ML, Varga SS, Rothermel AL, Collins AM, Pulito VL, Hanna LS, Dolan KP, Parren PW, Bluestone JA, Jolliffe LK, Zivin RA. In vitro characterization of five humanized OKT3 effector function variant antibodies. Cell Immunol 2000; 200:16-26. [PMID: 10716879 DOI: 10.1006/cimm.2000.1617] [Citation(s) in RCA: 170] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Orthoclone OKT 3 (mOKT3) is a highly effective agent for the reversal of steroid-resistant renal allograft rejection. However, its wider use has been limited by the development of a human anti-mouse antibody response (HAMA) and by the "cytokine release syndrome" (CRS). CRS has been associated with T cell/monocyte activation and, secondarily, with activation of the complement cascade. These processes are mediated through Abs' Fc regions by their abilities to cross-link T cells and mononuclear cells and to activate complements. To alleviate these problems, a group of five huIgG1- and huIgG4-based OKT3 wild-type antibodies and their corresponding Fc mutants with altered residues at amino acids 234, 235, and 318, reported to be required for FcgammaRI and FcgammaRII binding and complement fixation, were constructed. Characterization of these humanized OKT3 Abs, denoted huOKT3gamma1, huOKT3gamma4, huOKT3gamma1(A(234), A(235)), huOKT3gamma4(A(234), A(235)), and huOKT3gamma1(A(318)), has demonstrated that huOKT3gamma1(A(234), A(235)) and huOKT3gamma4(A(234), A(235)), and have at least a 100-fold reduced binding to FcgammaRI and FcgammaRII. As expected, they are much less potent in the induction of T cell activation and cytokine release, yet retain in vitro immunosuppressive effects as potent as those of mOKT3. Unexpectedly, while huOKT3gamma1(A(318)) did not show any reduction in its ability to bind C1q and to fix a complement, huOKT3gamma1(A(234), A(235)) was completely inactive. The in vitro characteristics of huOKT3gamma1(A(234), A(235)) are consistent with recent in vivo studies, in which this Ab showed greatly reduced HAMA and CRS with the retention of its ability to reverse ongoing graft rejection in man.
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Affiliation(s)
- D Xu
- Drug Discovery, R. W. Johnson Pharmaceutical Research Institute, Raritan, New Jersey 08869, USA
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