Sclerosis Model HLA-DR15 and TCR Transgenic Multiple High Incidence of Spontaneous Disease in An
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High Incidence of Spontaneous Disease in an HLA-DR15 and TCR Transgenic Multiple Sclerosis Model This information is current as Stephan Ellmerich, Marcin Mycko, Katalin Takacs, of September 28, 2021. Hanspeter Waldner, Faisal N. Wahid, Rosemary J. Boyton, Rosalind H. M. King, Paul A. Smith, Sandra Amor, Amy H. Herlihy, Rachel E. Hewitt, Mark Jutton, David A. Price, David A. Hafler, Vijay K. Kuchroo and Daniel M. Altmann J Immunol 2005; 174:1938-1946; ; Downloaded from doi: 10.4049/jimmunol.174.4.1938 http://www.jimmunol.org/content/174/4/1938 References This article cites 36 articles, 11 of which you can access for free at: http://www.jimmunol.org/ http://www.jimmunol.org/content/174/4/1938.full#ref-list-1 Why The JI? Submit online. • Rapid Reviews! 30 days* from submission to initial decision • No Triage! Every submission reviewed by practicing scientists by guest on September 28, 2021 • Fast Publication! 4 weeks from acceptance to publication *average Subscription Information about subscribing to The Journal of Immunology is online at: http://jimmunol.org/subscription Permissions Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html Email Alerts Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts The Journal of Immunology is published twice each month by The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2005 by The American Association of Immunologists All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. The Journal of Immunology High Incidence of Spontaneous Disease in an HLA-DR15 and TCR Transgenic Multiple Sclerosis Model1 Stephan Ellmerich,* Marcin Mycko,§ Katalin Takacs,* Hanspeter Waldner,§ Faisal N. Wahid,* Rosemary J. Boyton,* Rosalind H. M. King,¶ Paul A. Smith,† Sandra Amor,† Amy H. Herlihy,‡ Rachel E. Hewitt,ʈ Mark Jutton,* David A. Price,# David A. Hafler,§ Vijay K. Kuchroo,§ and Daniel M. Altmann2* Multiple sclerosis (MS) is thought to involve CD4 T cell recognition of self myelin, many studies focusing on a pathogenic role for anti-myelin, HLA-DR15-restricted T cells. In experimental allergic encephalomyelitis, it is known which epitopes trigger disease and that disease is associated with determinant spread of T cell reactivity. Characterization of these events in human MS is critical for the development of peptide immunotherapies, but it has been difficult to define the role of determinant spread or define which Downloaded from epitopes might be involved. In this study, we report humanized transgenic mice, strongly expressing HLA-DR15 with an MS- derived TCR; even on a RAG-2 wild-type background, mice spontaneously develop paralysis. Disease, involving demyelination and axonal degeneration, correlates with inter- and intramolecular spread of the T cell response to HLA-DR15-restricted epitopes of myelin basic protein, myelin oligodendrocyte glycoprotein, and ␣B-crystallin. Spread is reproducible and progressive, with two of the epitopes commonly described in responses of HLA-DR15 patients. The fact that this pattern is reiterated as a consequence of CNS tissue damage in mice demonstrates the value of the transgenic model in supplying an in vivo disease context for the human responses. This http://www.jimmunol.org/ model, encompassing pathologically relevant, spontaneous disease with the presentation of myelin epitopes in the context of HLA-DR15, should offer new insights and predictions about T cell responses during MS as well as a more stringent test bed for immunotherapies. The Journal of Immunology, 2005, 174: 1938–1946. xperimental allergic encephalomyelitis (EAE)3 is a pro- are abundant data on the specific T cell responses that must be totypic model of autoimmunity in which many basic te- targeted to alleviate disease, while in human studies, in which a E nets of autoimmune disease originate (1). Efforts to im- multitude of T cell epitopes is implicated, this is not the case. An plement peptide-based immunotherapies for multiple sclerosis additional problem is that, in many EAE models, disease progres- (MS) aim to build on the large dataset of EAE tolerogenic and sion is associated with spread of T cell responses, although de- by guest on September 28, 2021 antagonist peptide therapies (2, 3). However, translation from a pendence of disease on spread differs somewhat between EAE peptide-induced murine model to the complex pattern of myelin models, raising questions about the generality of this effect in CNS responses found in humans with a spontaneous and variable dis- disease (4–7). The role of epitope spread in relapsing and remitting ease such as MS offers a daunting challenge. In mouse EAE, there MS is unclear. Heterogeneity in HLA genotype and disease phe- notype and the long timescale of disease progression make this *Human Disease Immunogenetics Group, Department of Infectious Diseases and difficult to study (8, 9). An appreciation of the nature and extent of Transplantation Biology Group, Medical Research Council Clinical Sciences Centre, epitope spread in MS will be critical to the successful development † Imperial College, Hammersmith Hospital, London, United Kingdom; Department of of peptide therapies, which may need to be different in patients Neuroinflammation, Division of Neuroscience, Imperial College and Department of Immunobiology, Biomedical Primate Research Centre, Rijswijk, The Netherlands; with long-term compared with recent onset disease (10). ‡Biological Imaging Centre, Medical Research Council Clinical Sciences Centre, Im- § The response against myelin basic protein (MBP) 83–99 is an perial College, London, United Kingdom; Center for Neurologic Diseases, Brigham ϩ and Women’s Hospital, Harvard Medical School, Boston, MA 02115; ¶Department of immunodominant one in DR15 MS patients (11), while compar- Clinical Neurosciences, Royal Free and University College Medical School, London, ʈ ison of T cell responses to myelin from normal and MS brain United Kingdom; Peter Medawar Building for Pathogen Research, University of ␣ Oxford, Oxford, United Kingdom; and #Vaccine Research Center, National Institute emphasizes the importance of responses to B-crystallin in MS- of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD derived tissue (12). Furthermore, ␣B-crystallin is one of the most 20892 abundantly induced transcripts in MS brain (13). Other compari- Received for publication September 14, 2004. Accepted for publication November sons of T cell responses from patients and controls identify 11, 2004. epitopes from myelin oligodendrocyte glycoprotein (MOG) and The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked advertisement in accordance proteolipoprotein (14, 15). with 18 U.S.C. Section 1734 solely to indicate this fact. An optimal MS model for addressing these issues would be 1 This work was funded by grants from the Multiple Sclerosis Society of Great Britain spontaneous, introducing no inherent bias through being rooted in and Northern Ireland and the Biotechnology and Biological Sciences Research particular modes of EAE induction, would be pathologically se- Council. vere and faithful to the human disease, and would be immunoge- 2 Address correspondence and reprint requests to Dr. Daniel M. Altmann, Human Disease Immunogenetics Group, Department of Infectious Diseases, Imperial Col- netically humanized. In this way, HLA-restricted epitopes impli- lege, Hammersmith Hospital, Du Cane Road, London W12 ONN, U.K. E-mail ad- cated in disease progression or amelioration in the reductionist dress: [email protected] context of the mouse model could be readily investigated in the 3 Abbreviations used in this paper: EAE, experimental allergic encephalomyelitis; MBP, myelin basic protein; MOG, myelin oligodendrocyte glycoprotein; MS, mul- human setting. One of the first reported TCR transgenic disease tiple sclerosis; PNS, peripheral nervous system; SP, single positive. models involving expression of a murine EAE-derived TCR Copyright © 2005 by The American Association of Immunologists, Inc. 0022-1767/05/$02.00 The Journal of Immunology 1939 showed a high incidence of spontaneous disease that was depen- 5 ϫ 103 per well with CD4ϩ or CD8ϩ effector cells. At 4 h, supernatants dent to some extent on the environment in which the mice were were removed from each well for counting in an automated gamma housed (16). The immunogenetics of human MS have previously counter. Specific lysis was calculated according to the formula: (mean sam- ple cpm Ϫ mean spontaneous release)/(mean total cpm Ϫ mean sponta- been modeled by expressing HLA class II genes, or HLA-DR with neous release) ϫ 100. a matched TCR, in transgenic mice (17–20). Disease in HLA-DR/ TCR transgenics has been achieved by injection of myelin peptides Paralysis scores under EAE-inducing conditions or by crossing onto RAG-2 knock- Mice were scored for spontaneous disease, as follows: 0, normal; 1, limp outs, eliminating T regulatory cells, although a high incidence of tail; 2, impaired righting reflex or waddling gait; 3, partial hind limb pa- spontaneous disease in humanized models has rarely been ob- ralysis; 4, total hind limb paralysis; 5, total limb paralysis; 6, moribund. served. In this study, we describe a unique model in which there is Histopathology a very high incidence of spontaneous disease, allowing the analysis of CNS pathology that is faithful to clinical