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Neigel JE, Avise JC. CLONAL DIVERSITY AND POPULATION STRUCTURE IN A REEF-BUILDING CORAL, ACROPORA CERVICORNIS: SELF-RECOGNITION ANALYSIS AND DEMOGRAPHIC INTERPRETATION. Evolution 2017; 37:437-453. [PMID: 28563300 DOI: 10.1111/j.1558-5646.1983.tb05561.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/1981] [Revised: 08/12/1982] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph E Neigel
- Department of Molecular and Population Genetics, University of Georgia, Athens, Georgia, 30602
| | - John C Avise
- Department of Molecular and Population Genetics, University of Georgia, Athens, Georgia, 30602
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Koch CP, Perna AM, Weissmüller S, Bauer S, Pillong M, Baleeiro RB, Reutlinger M, Folkers G, Walden P, Wrede P, Hiss JA, Waibler Z, Schneider G. Exhaustive proteome mining for functional MHC-I ligands. ACS Chem Biol 2013; 8:1876-81. [PMID: 23772559 DOI: 10.1021/cb400252t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We present the development and application of a new machine-learning approach to exhaustively and reliably identify major histocompatibility complex class I (MHC-I) ligands among all 20(8) octapeptides and in genome-derived proteomes of Mus musculus , influenza A H3N8, and vesicular stomatitis virus (VSV). Focusing on murine H-2K(b), we identified potent octapeptides exhibiting direct MHC-I binding and stabilization on the surface of TAP-deficient RMA-S cells. Computationally identified VSV-derived peptides induced CD8(+) T-cell proliferation after VSV-infection of mice. The study demonstrates that high-level machine-learning models provide a unique access to rationally designed peptides and a promising approach toward "reverse vaccinology".
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Affiliation(s)
- Christian P. Koch
- Department of Chemistry and
Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Wolfgang-Pauli-Str. 10, 8093 Zürich,
Switzerland
| | - Anna M. Perna
- Department of Chemistry and
Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Wolfgang-Pauli-Str. 10, 8093 Zürich,
Switzerland
| | | | - Stefanie Bauer
- Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225
Langen, Germany
| | - Max Pillong
- Department of Chemistry and
Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Wolfgang-Pauli-Str. 10, 8093 Zürich,
Switzerland
| | - Renato B. Baleeiro
- Charité - Universitätsmedizin Berlin, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin,
Germany
| | - Michael Reutlinger
- Department of Chemistry and
Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Wolfgang-Pauli-Str. 10, 8093 Zürich,
Switzerland
| | - Gerd Folkers
- Department of Chemistry and
Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Wolfgang-Pauli-Str. 10, 8093 Zürich,
Switzerland
- Collegium Helveticum, Schmelzbergstr. 25, 8092 Zürich,
Switzerland
| | - Peter Walden
- Charité - Universitätsmedizin Berlin, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin,
Germany
| | - Paul Wrede
- Charité - Universitätsmedizin
Berlin, Molecular Biology and Bioinformatics, Campus Benjamin Franklin,
Arnimallee 22, 14195 Berlin, Germany
| | - Jan A. Hiss
- Department of Chemistry and
Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Wolfgang-Pauli-Str. 10, 8093 Zürich,
Switzerland
| | - Zoe Waibler
- Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225
Langen, Germany
| | - Gisbert Schneider
- Department of Chemistry and
Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Wolfgang-Pauli-Str. 10, 8093 Zürich,
Switzerland
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Abstract
Nearly all colonial marine invertebrates are capable of allorecognition--the ability to distinguish between self and genetically distinct members of the same species. When two or more colonies grow into contact, they either reject each other and compete for the contested space or fuse and form a single, chimeric colony. The specificity of this response is conferred by genetic systems that restrict fusion to self and close kin. Two selective pressures, intraspecific spatial competition between whole colonies and competition between stem cells for access to the germline in fused chimeras, are thought to drive the evolution of extensive polymorphism at invertebrate allorecognition loci. After decades of study, genes controlling allorecognition have been identified in two model systems, the protochordate Botryllus schlosseri and the cnidarian Hydractinia symbiolongicarpus. In both species, allorecognition specificity is determined by highly polymorphic cell-surface molecules, encoded by the fuhc and fester genes in Botryllus, and by the alr1 and alr2 genes in Hydractinia. Here we review allorecognition phenomena in both systems, summarizing recent molecular advances, comparing and contrasting the life history traits that shape the evolution of these distinct allorecognition systems, and highlighting questions that remain open in the field.
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Palmer CV, Bythell JC, Willis BL. Levels of immunity parameters underpin bleaching and disease susceptibility of reef corals. FASEB J 2010; 24:1935-46. [DOI: 10.1096/fj.09-152447] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Caroline V. Palmer
- Australian Research Council Centre of Excellence for Coral Reef Studies and School of Marine and Tropical Biology James Cook University Townsville Queensland Australia
| | - John C. Bythell
- School of Biology Newcastle University Newcastle upon Tyne UK
| | - Bette L. Willis
- Australian Research Council Centre of Excellence for Coral Reef Studies and School of Marine and Tropical Biology James Cook University Townsville Queensland Australia
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Affiliation(s)
- Klas Kärre
- Strategic Research Center for Studies of Integrative Recognition in the Immune System (IRIS), Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
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Abstract
This article is based on a lecture presented at the Novartis Prize ceremony at the International Congress of Immunology in July 2001. It gives a personal and historical perspective on the research performed by the author and his colleagues during the development and pursuit of the model of 'missing-self recognition' for natural killer (NK) cells. This model is based on the idea that one important function of NK cells is to detect and eliminate cells because they fail to express normal self markers. Further mechanistic models predicted the existence of inhibitory major histocompatibility complex (MHC) class I specific receptors, later identified by the fellow Novartis laureates contributing in this issue. The article covers the first decade (1980-1990) of research on this concept. It discusses factors contributing to the formulation of a hypothesis, the use of predictions and experimental test models, the importance of international collaborations and reagent exchange, and several other aspects that allowed the progression of this research project. Finally, the perspective of today's knowledge is used to discuss some surprising findings where the missing-self hypothesis made the wrong predictions, or at least failed to make the correct ones.
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Affiliation(s)
- K Kärre
- Microbiology and Tumor Biology Center, Karolinska Institute, Stockholm, Sweden.
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Parish CR. Signal minus 1: a key factor in immunological tolerance to tissue-specific self antigens? Immunol Cell Biol 1996; 74:278-85. [PMID: 8799729 DOI: 10.1038/icb.1996.49] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Recent data suggest that many autoreactive T cells, particularly to tissue-specific self antigens, can escape thymic deletion. The current dogma is that these autoreactive T cells are silenced by the failure of most tissues to provide co-stimulation (signal 2), antigen alone (signal 1) inducing T cell unresponsiveness. However, I propose that activation of autoreactive T cells frequently occurs but autodestruction by effector T cells is tightly regulated. This phenomenon is most evident with lymph node metastasizing tumour cells where the regional lymph node can mount a vigorous response to the invading tumour cells but tumour growth is unimpaired. I suggest that autodestruction is prevented by inhibitory receptors on T cells which recognize class I MHC structures on target cells. These receptors, which I propose deliver 'signal minus 1' to T cells, were recently described on NK cells and a subpopulation of peripheral T cells. They are also strikingly similar to a family of anti-self receptors that my laboratory described on murine T and B cells 15 years ago. In the 'signal minus 1' model, antigen-activated T cells acquire the inhibitory receptors when they become co-stimulation independent and gain the ability to exit lymphoid organs and enter non-lymphoid tissues. Thus, if autoreactive effector T cells encounter autoantigen in tissues they are functionally silenced by inhibitory receptor engagement and signal minus 1 delivery. In contrast, I propose that in response to intracellular infections, cells down-regulate expression of their ligands for inhibitory receptors. Such a model allows infected cells to be selectively eliminated by effector T cells. If correct, the model predicts that effector T cells, whether foreign-antigen- or autoantigen-specific, can selectively respond to infected cells. This apparent 'usefulness' of autoreactive T cells may explain their observed persistence even after an encounter with autoantigen. It is also suggested that signal minus 1 may silence autoreactive B cells specific for tissue-specific cell surface antigens and lack of signal minus 1 may partially explain the vigorous T cell response to allogeneic MHC. Finally, it is hypothesized that, in evolutionary terms, inhibition of autodestruction by the recognition of a 'self marker' and delivery of signal minus 1 is an ancient process which probably emerged in early metazoans.
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Affiliation(s)
- C R Parish
- Division of Immunology and Cell Biology, John Curtin School of Medical Research, Australian National University, Canberra
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