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Paganelli R, Di Lizia M, D'Urbano M, Gatta A, Paganelli A, Amerio P, Parronchi P. Insights from a Case of Good's Syndrome (Immunodeficiency with Thymoma). Biomedicines 2023; 11:1605. [PMID: 37371700 DOI: 10.3390/biomedicines11061605] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
Immunodeficiency with thymoma was described by R.A. Good in 1954 and is also named after him. The syndrome is characterized by hypogammaglobulinemia associated with thymoma and recurrent infections, bacterial but also viral, fungal and parasitic. Autoimmune diseases, mainly pure red cell aplasia, other hematological disorders and erosive lichen planus are a common finding. We describe here a typical case exhibiting all these clinical features and report a detailed immunophenotypic assessment, as well as the positivity for autoantibodies against three cytokines (IFN-alpha, IL-6 and GM-CSF), which may add to known immune abnormalities. A review of the published literature, based on case series and immunological studies, offers some hints on the still unsolved issues of this rare condition.
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Affiliation(s)
- Roberto Paganelli
- Department of Medicine and Sciences of Aging, University "G. D'Annunzio" of Chieti-Pescara, 66100 Chieti, Italy
- Internal Medicine, School of Medicine, UniCamillus, Saint Camillus International University of Health Sciences, 00131 Rome, Italy
| | - Michela Di Lizia
- Allergology ASL Teramo, Hospital of Giulianova, 64021 Giulianova, Italy
| | - Marika D'Urbano
- Laboratory Unit, Hospital S. Annunziata, 67039 Sulmona, Italy
| | - Alessia Gatta
- Allergology Service, ASL Chieti, 66100 Chieti, Italy
| | - Alessia Paganelli
- PhD Course in Clinical and Experimental Medicine, University of Modena-Reggio Emilia, 41121 Modena, Italy
| | - Paolo Amerio
- Department of Medicine and Sciences of Aging, University "G. D'Annunzio" of Chieti-Pescara, 66100 Chieti, Italy
| | - Paola Parronchi
- Department of Experimental Medicine, University of Florence, 50121 Florence, Italy
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Autoimmune complications of COVID-19 and potential consequences for long-lasting disease syndromes. Transfus Apher Sci 2023; 62:103625. [PMID: 36585276 PMCID: PMC9757887 DOI: 10.1016/j.transci.2022.103625] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The latest WHO report determined the increasing diversity within the CoV-2 omicron and its descendent lineages. Some heavily mutated offshoots of BA.5 and BA.2, such as BA.4.6, BF.7, BQ.1.1, and BA.2.75, are responsible for about 20% of infections and are spreading rapidly in multiple countries. It is a sign that Omicron subvariants are now developing a capacity to be more immune escaping and may contribute to a new wave of COVID-19. Covid-19 infections often induce many alterations in human physiological defense and the natural control systems, with exacerbated activation of the inflammatory and homeostatic response, as for any infectious diseases. Severe activation of the early phase of hemostatic components, often occurs, leading to thrombotic complications and often contributing to a lethal outcome selectively in certain populations. Development of autoimmune complications increases the disease burden and lowers its prognosis. While the true mechanism still remains unclear, it is believed to mainly be related to the host autoimmune responses as demonstrated, only in some patients suffering from the presence of autoantibodies that worsens the disease evolution. In fact in some studies the development of autoantibodies to angiotensin converting enzyme 2 (ACE2) was identified, and in other studies autoantibodies, thought to be targeting interferon or binding to annexin A1, or autoantibodies to phospholipids were seen. Moreover, the occurrence of autoimmune heparin induced thrombocytopenia has also been described in infected patients treated with heparin for controlling thrombogenicity. This commentary focuses on the presence of various autoantibodies reported so far in Covid-19 diseases, exploring their association with the disease course and the durability of some related symptoms. Attempts are also made to further analyze the potential mechanism of actions and link the presence of antibodies with pathological complications.
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The short-term predictive value of CD4 + cells for combination therapy with high-dose dexamethasone and immunoglobulin in newly diagnosed primary immune thrombocytopenia patients. Thromb Res 2022; 218:157-168. [PMID: 36054980 DOI: 10.1016/j.thromres.2022.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 08/11/2022] [Accepted: 08/15/2022] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Dexamethasone (DXM) or immunoglobulin (IVIg) are first-line therapies for primary immune thrombocytopenia (ITP), with an effective rate of 80 %. Some patients with both severe bleeding symptoms and platelet counts of <30 × 109/L received a combination of DXM and IVIg. Autoimmune disorders, especially involving CD4+ T-cells, play a key role in the pathogenesis of ITP. We assumed that variations in the immune status of CD4+ T-cells will lead to different treatment responses. Until now, there have been few relevant clinical studies on CD4+ T-cells and the outcome of first-line therapies. METHODS A prospective study enrolling 42 newly diagnosed ITP patients and 30 normal control volunteers was performed. The profiles of major CD4+ T-cells, including T helper (Th)1, Th2, Th17, and regulatory T (Treg) cells, and the related levels of interleukin (IL)-2, IL-17, and IL-23 were examined. The platelet number was recorded at the time point of day 0, day 14, and day 30. RESULTS Greater concentrations of Th1 and Th17 cells and lower relative numbers of Treg cells were found in the ITP group. As for the treatment outcome on day 14, the profiles of Th2 and IL-2 were significantly greater in the NR group, while the expression of IL-17 was elevated in the CR group. As for the treatment outcome on day 30, higher levels of Th2 cells were observed in those patients who needed 2× pulses of HD DXM compared to those who needed only 1× pulse of HD DXM and IVIg, and receiver operating characteristic curve analysis showed that lower Treg cell may predict favorable values. Meanwhile, the higher IL-23 value may predict a poor early response. CONCLUSIONS Our results indicate that Th1, Th17, and Treg cells and IL-2 and IL-23 participate in the onset of ITP. Higher profiles of Th2, IL-2 and IL-23 may predict poor treatment outcomes. Higher levels of IL-17 and lower profile of Treg may predict sensitivity to HD DXM and IVIg combination therapy.
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Kvivik I, Grimstad T, Jonsson G, Kvaløy JT, Omdal R. Anti-HMGB1 auto-Abs influence fatigue in patients with Crohn's disease. Innate Immun 2021; 27:286-293. [PMID: 33940970 PMCID: PMC8186155 DOI: 10.1177/17534259211014252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Fatigue is common in all chronic inflammatory and autoimmune diseases. A conceptual model for understanding the biological basis of fatigue describes it as being a part of the sickness behaviour response generated by pro-inflammatory cytokines and other mediators. We hypothesised that the pro-inflammatory high mobility group box 1 (HMGB1) protein is a fatigue-inducing molecule and that auto-Abs against HMGB1 reduce fatigue. We measured Abs against disulphide (ds) HMGB1 and fully reduced (fr) HMGB1 in plasma from 57 patients with Crohn’s disease. Fatigue was rated using the fatigue visual analogue scale (fVAS) and disease activity with faecal calprotectin, C-reactive protein and the Simple Endoscopic Score for Crohn’s disease. Multivariable regression models identified anti-dsHMGB1 and anti-frHMGB1 Abs as the strongest contributing factors for fVAS scores (B = −29.10 (P = 0.01), R2 = 0.17, and B = −17.77 (P = 0.01), R2 = 0.17, respectively). Results indicate that anti-HMGB1 auto-Abs alleviate fatigue possibly by down-regulating HMGB1-induced sickness behaviour.
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Affiliation(s)
| | - Tore Grimstad
- Unit of Gastroenterology, Department of Internal Medicine, Stavanger University Hospital, Norway.,Department of Clinical Science, Faculty of Medicine, University of Bergen, Norway
| | - Grete Jonsson
- Department of Medical Biochemistry, Stavanger University Hospital, Norway.,Department of Chemistry, Bioscience and Environmental Engineering, University of Stavanger, Norway
| | - Jan T Kvaløy
- Research Department, Stavanger University Hospital, Norway.,Department of Mathematics and Physics, University of Stavanger, Norway
| | - Roald Omdal
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Norway.,Clinical Immunology Unit, Department of Internal Medicine, Stavanger University Hospital, Norway
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Lombardo SD, Mazzon E, Basile MS, Cavalli E, Bramanti P, Nania R, Fagone P, Nicoletti F, Petralia MC. Upregulation of IL-1 Receptor Antagonist in a Mouse Model of Migraine. Brain Sci 2019; 9:E172. [PMID: 31331109 PMCID: PMC6680509 DOI: 10.3390/brainsci9070172] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 07/18/2019] [Indexed: 02/07/2023] Open
Abstract
Migraine is a disorder characterized by attacks of monolateral headaches, often accompanied by nausea, vomiting, and photophobia. Around 30% of patients also report aura symptoms. The cause of the aura is believed to be related to the cortical spreading depression (CSD), a wave of neuronal and glial depolarization originating in the occipital cortex, followed by temporary neuronal silencing. During a migraine attack, increased expression of inflammatory mediators, along with a decrease in the expression of anti-inflammatory genes, have been observed. The aim of this study was to evaluate the expression of inflammatory genes, in particular that of IL-1 receptor antagonist (IL-1RN), following CSD in a mouse model of familial hemiplegic migraine type 1 (FHM-1). We show here that the expression of IL-1RN was upregulated after the CSD, suggesting a possible attempt to modulate the inflammatory response. This study allows researchers to better understand the development of the disease and aids in the search for new therapeutic strategies in migraine.
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Affiliation(s)
- Salvo Danilo Lombardo
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 89, 95123 Catania, Italy
| | - Emanuela Mazzon
- IRCCS Centro Neurolesi Bonino Pulejo, Strada Statale 113, C.da Casazza, 98124 Messina, Italy
| | - Maria Sofia Basile
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 89, 95123 Catania, Italy
| | - Eugenio Cavalli
- IRCCS Centro Neurolesi Bonino Pulejo, Strada Statale 113, C.da Casazza, 98124 Messina, Italy
| | - Placido Bramanti
- IRCCS Centro Neurolesi Bonino Pulejo, Strada Statale 113, C.da Casazza, 98124 Messina, Italy
| | - Riccardo Nania
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 89, 95123 Catania, Italy
| | - Paolo Fagone
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 89, 95123 Catania, Italy
| | - Ferdinando Nicoletti
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 89, 95123 Catania, Italy.
| | - Maria Cristina Petralia
- IRCCS Centro Neurolesi Bonino Pulejo, Strada Statale 113, C.da Casazza, 98124 Messina, Italy
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Bliddal S, Nielsen CH, Feldt-Rasmussen U. Recent advances in understanding autoimmune thyroid disease: the tallest tree in the forest of polyautoimmunity. F1000Res 2017; 6:1776. [PMID: 29043075 PMCID: PMC5621109 DOI: 10.12688/f1000research.11535.1] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/29/2017] [Indexed: 12/17/2022] Open
Abstract
Autoimmune thyroid disease (AITD) is often observed together with other autoimmune diseases. The coexistence of two or more autoimmune diseases in the same patient is referred to as polyautoimmunity, and AITD is the autoimmune disease most frequently involved. The occurrence of polyautoimmunity has led to the hypothesis that the affected patients suffer from a generalized dysregulation of their immune system. The present review summarizes recent discoveries unravelling the immunological mechanisms involved in autoimmunity, ranging from natural autoimmunity to disease-specific autoimmunity. Furthermore, the clinical grounds for considering AITD in a setting of polyautoimmunity are explored. A better understanding of these may pave the way for designing new treatment modalities targeting the underlying immune dysregulation when AITD appears in the context of polyautoimmunity.
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Affiliation(s)
- Sofie Bliddal
- Department of Medical Endocrinology, Section 2132, Copenhagen University Hospital (Rigshospitalet), Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Claus Henrik Nielsen
- Institute for Inflammation Research, Center for Rheumatology and Spine Diseases, section 7521, Copenhagen University Hospital (Rigshospitalet), Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Ulla Feldt-Rasmussen
- Department of Medical Endocrinology, Section 2132, Copenhagen University Hospital (Rigshospitalet), Blegdamsvej 9, 2100 Copenhagen, Denmark
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Kireev FD, Lopatnikova JA, Sennikov SV. Production of pure fractions of immunoglobulin G subclass autoantibodies against tumor necrosis factor. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1055-1056:149-157. [PMID: 28475929 DOI: 10.1016/j.jchromb.2017.04.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 02/13/2017] [Accepted: 04/21/2017] [Indexed: 11/26/2022]
Abstract
Autoantibodies directed against cytokines are important effector molecules regulating the biological activity of cytokines. There is experimental evidence indicating that autoantibodies belonging to different immunoglobulin G (IgG) subclasses may have different functional activity. The purpose of this work was to develop a protocol for the purification of fractions of IgG subclass antibodies directed against tumor necrosis factor (TNF). We developed a series of steps, including gel filtration, positive and negative affinity chromatography, and ultrafiltration, to achieve this goal. Our protocol purified IgG subclass autoantibodies directed against TNF from a human immunoglobulin preparation. The isolation of these anti-TNF autoantibodies will enable evaluation of the effect of TNF-specific antibodies on TNF biological activity. Our newly developed technique for purifying subclasses of anti-TNF autoantibodies may be important for both basic research on the functional activity of these autoantibodies and for clinical immunology.
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Affiliation(s)
- Fedor D Kireev
- Federal State Budgetary Scientific Institution "Research Institute of Fundamental and Clinical Immunology", Yadrintsevskaya St., 14, 630099 Novosibirsk, Russia.
| | - Julia A Lopatnikova
- Federal State Budgetary Scientific Institution "Research Institute of Fundamental and Clinical Immunology", Yadrintsevskaya St., 14, 630099 Novosibirsk, Russia.
| | - Sergey V Sennikov
- Federal State Budgetary Scientific Institution "Research Institute of Fundamental and Clinical Immunology", Yadrintsevskaya St., 14, 630099 Novosibirsk, Russia.
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Ndongo-Thiam N, Clement A, Pin JJ, Razanajaona-Doll D, Miossec P. Negative association between autoantibodies against IL-17, IL-17/anti-IL-17 antibody immune complexes and destruction in rheumatoid arthritis. Ann Rheum Dis 2016; 75:1420-2. [DOI: 10.1136/annrheumdis-2016-209149] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 03/31/2016] [Indexed: 12/14/2022]
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Issekutz AC, Derfalvi B, Käsermann F, Rowter D. Potentiation of cytokine-induced proliferation of human Natural Killer cells by intravenous immunoglobulin G. Clin Immunol 2015; 161:373-83. [PMID: 26307433 DOI: 10.1016/j.clim.2015.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 07/31/2015] [Accepted: 08/18/2015] [Indexed: 12/30/2022]
Abstract
Intravenous IgG (IVIG) therapy can be used for immunomodulation. IL-2 is an immunoregulatory cytokine. We evaluated IVIG modulation of human blood lymphocyte response to IL-2 and other cytokines. Neither IVIG nor low concentrations of IL-2 (3-30U/ml) induced lymphocyte proliferation, but in combination they synergistically enhanced proliferation of NK cells. The CD56(bright) cells expanded more than CD56(dim) NK cells, with 90% of NK cells dividing up to 8 generations by day 6, while <8% of T cells divided. IVIG also potentiated NK cell proliferation with IL-12, IL-15 and IL-18. The IVIG+cytokine-expanded NK cells were less cytotoxic for K562 cells, than NK cells with cytokine alone. IVIG also enhanced interferon-γ production with IL-2, IL-12 and IL-18. In conclusion, IVIG selectively potentiates NK cell proliferation and interferon-γ secretion with IL-2, IL-12, IL-15 and IL-18 in vitro. These findings warrant evaluation in vivo in relation to NK cells and the immunoregulatory actions of IVIG.
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Affiliation(s)
- Andrew C Issekutz
- Departments of Pediatrics, Dalhousie University, Halifax, NS, Canada.
| | - Beata Derfalvi
- Departments of Pediatrics, Dalhousie University, Halifax, NS, Canada
| | | | - Derek Rowter
- Departments of Pediatrics, Dalhousie University, Halifax, NS, Canada
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Luštrek M, Lorenz P, Kreutzer M, Qian Z, Steinbeck F, Wu D, Born N, Ziems B, Hecker M, Blank M, Shoenfeld Y, Cao Z, Glocker MO, Li Y, Fuellen G, Thiesen HJ. Epitope predictions indicate the presence of two distinct types of epitope-antibody-reactivities determined by epitope profiling of intravenous immunoglobulins. PLoS One 2013; 8:e78605. [PMID: 24244326 PMCID: PMC3823795 DOI: 10.1371/journal.pone.0078605] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 09/20/2013] [Indexed: 01/23/2023] Open
Abstract
Epitope-antibody-reactivities (EAR) of intravenous immunoglobulins (IVIGs) determined for 75,534 peptides by microarray analysis demonstrate that roughly 9% of peptides derived from 870 different human protein sequences react with antibodies present in IVIG. Computational prediction of linear B cell epitopes was conducted using machine learning with an ensemble of classifiers in combination with position weight matrix (PWM) analysis. Machine learning slightly outperformed PWM with area under the curve (AUC) of 0.884 vs. 0.849. Two different types of epitope-antibody recognition-modes (Type I EAR and Type II EAR) were found. Peptides of Type I EAR are high in tyrosine, tryptophan and phenylalanine, and low in asparagine, glutamine and glutamic acid residues, whereas for peptides of Type II EAR it is the other way around. Representative crystal structures present in the Protein Data Bank (PDB) of Type I EAR are PDB 1TZI and PDB 2DD8, while PDB 2FD6 and 2J4W are typical for Type II EAR. Type I EAR peptides share predicted propensities for being presented by MHC class I and class II complexes. The latter interaction possibly favors T cell-dependent antibody responses including IgG class switching. Peptides of Type II EAR are predicted not to be preferentially presented by MHC complexes, thus implying the involvement of T cell-independent IgG class switch mechanisms. The high extent of IgG immunoglobulin reactivity with human peptides implies that circulating IgG molecules are prone to bind to human protein/peptide structures under non-pathological, non-inflammatory conditions. A webserver for predicting EAR of peptide sequences is available at www.sysmed-immun.eu/EAR.
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Affiliation(s)
- Mitja Luštrek
- Institute for Biostatistics and Informatics in Medicine and Ageing Research, Universitätsmedizin, University of Rostock, Rostock, Germany
- Department of Intelligent Systems, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Peter Lorenz
- Institute of Immunology, Universitätsmedizin Rostock, University of Rostock, Rostock, Germany
| | - Michael Kreutzer
- Institute of Immunology, Universitätsmedizin Rostock, University of Rostock, Rostock, Germany
| | - Zilliang Qian
- Institute of Immunology, Universitätsmedizin Rostock, University of Rostock, Rostock, Germany
- Shanghai Institute for Biological Sciences, Shanghai, China
| | - Felix Steinbeck
- Institute of Immunology, Universitätsmedizin Rostock, University of Rostock, Rostock, Germany
| | - Di Wu
- Institute of Immunology, Universitätsmedizin Rostock, University of Rostock, Rostock, Germany
- Shanghai Institute for Biological Sciences, Shanghai, China
| | - Nadine Born
- Institute of Immunology, Universitätsmedizin Rostock, University of Rostock, Rostock, Germany
| | - Bjoern Ziems
- Gesellschaft für Individualisierte Medizin GmbH, Rostock, Germany
| | - Michael Hecker
- Steinbeis Transfer Center for Proteome Analysis, Rostock, Germany
| | - Miri Blank
- The Zabludovicz Center for Autoimmune Diseases, Sheba Medical Center, Ramat-Gan, Israel
| | - Yehuda Shoenfeld
- The Zabludovicz Center for Autoimmune Diseases, Sheba Medical Center, Ramat-Gan, Israel
| | - Zhiwei Cao
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | | | - Yixue Li
- Shanghai Institute for Biological Sciences, Shanghai, China
| | - Georg Fuellen
- Institute for Biostatistics and Informatics in Medicine and Ageing Research, Universitätsmedizin, University of Rostock, Rostock, Germany
| | - Hans-Jürgen Thiesen
- Institute of Immunology, Universitätsmedizin Rostock, University of Rostock, Rostock, Germany
- * E-mail:
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Bendtzen K. Anti-TNF-α biotherapies: perspectives for evidence-based personalized medicine. Immunotherapy 2012. [DOI: 10.2217/imt.12.114] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This article discusses the rationale behind recommending immunopharmacological guidance of long-term therapies with genetically engineered anti-TNF-α immunoglobulin constructs. Arguments why therapeutic decision-making should not rely on clinical outcome alone are presented. Central to this is that the use of theranostics (i.e., monitoring circulating levels of functional anti-TNF-α drugs and antidrug antibodies) would markedly improve treatment because therapies can be tailored to individual patients and provide more effective and economical long-term therapies with minimal risk of side effects. Large-scale immunopharmacological knowledge of how patients ‘handle’ TNF-α biopharmaceuticals would also help industry develop more effective and safer TNF-α inhibitors.
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Affiliation(s)
- Klaus Bendtzen
- Institute for Inflammation Research (IIR 7521), Rigshospitalet University Hospital, 9 Blegdamsvej, DK-2100 Copenhagen, Denmark
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