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  • 1
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    B cell ligand discrimination through a spreading and contraction response (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-05-06
    Description: B cells recognize foreign antigens by virtue of cell surface immunoglobulin receptors and are most effectively activated by membrane-bound ligands. Here, we show that in the early stages of this process, B cells exhibit a two-phase response in which they first spread over the antigen-bearing membrane and then contract, thereby collecting bound antigen into a central aggregate. The extent of this response, which is both signaling- and actin-dependent, determines the quantity of antigen accumulated and hence the degree of B cell activation. Brownian dynamic simulations reproduce essential features of the antigen collection process and suggest a possible basis for affinity discrimination. We propose that dynamic spreading is an important step of the immune response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fleire, S J -- Goldman, J P -- Carrasco, Y R -- Weber, M -- Bray, D -- Batista, F D -- G64713/PHS HHS/ -- New York, N.Y. -- Science. 2006 May 5;312(5774):738-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lymphocyte Interaction Laboratory, London Research Institute, Cancer Research UK, 44 Lincoln's Inn Fields, London, WC2A 3PX, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16675699" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/physiology ; Algorithms ; Animals ; Antibody Affinity ; Antigen Presentation ; Antigens, Surface/*immunology ; B-Lymphocytes/*immunology/*physiology ; Cell Shape ; Computer Simulation ; Flow Cytometry ; Ligands ; Lipid Bilayers ; *Lymphocyte Activation ; Mice ; Mice, Transgenic ; Microscopy, Fluorescence ; Models, Immunological ; Muramidase/immunology ; Receptors, Antigen, B-Cell/*immunology/metabolism ; Recombinant Fusion Proteins/immunology ; Signal Transduction ; Stochastic Processes ; T-Lymphocytes/immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Asymmetric segregation of polarized antigen on B cell division shapes presentation capacity (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-01-28
    Description: During the activation of humoral immune responses, B cells acquire antigen for subsequent presentation to cognate T cells. Here we show that after mouse B cells accumulate antigen, it is maintained in a polarized distribution for extended periods in vivo. Using high-throughput imaging flow cytometry, we observed that this polarization is preserved during B cell division, promoting asymmetric antigen segregation among progeny. Antigen inheritance correlates with the ability of progeny to activate T cells: Daughter cells receiving larger antigen stores exhibit a prolonged capacity to present antigen, which renders them more effective in competing for T cell help. The generation of progeny with differential capacities for antigen presentation may have implications for somatic hypermutation and class switching during affinity maturation and as B cells commit to effector cell fates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thaunat, Olivier -- Granja, Aitor G -- Barral, Patricia -- Filby, Andrew -- Montaner, Beatriz -- Collinson, Lucy -- Martinez-Martin, Nuria -- Harwood, Naomi E -- Bruckbauer, Andreas -- Batista, Facundo D -- Cancer Research UK/United Kingdom -- New York, N.Y. -- Science. 2012 Jan 27;335(6067):475-9. doi: 10.1126/science.1214100.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lymphocyte Interaction Laboratory, London Research Institute, Cancer Research UK, 44 Lincoln's Inn Fields, London, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22282815" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; Antigens/*analysis/*immunology ; B-Lymphocytes/cytology/*immunology ; Cell Division ; Cell Proliferation ; Cells, Cultured ; Coculture Techniques ; Computer Simulation ; Flow Cytometry ; *Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Models, Immunological ; Muramidase/analysis/immunology ; T-Lymphocytes/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Retrospective. Michael Neuberger (1953-2013) (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-12-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sale, Julian E -- Patel, Ketan J -- Batista, Facundo D -- MC_U105178808/Medical Research Council/United Kingdom -- MC_U105178811/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2013 Dec 13;342(6164):1335. doi: 10.1126/science.1248808.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory of Molecular Biology, Cambridge, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24337288" target="_blank"〉PubMed〈/a〉
    Keywords: Allergy and Immunology/*history ; Animals ; Antibodies, Monoclonal, Humanized/*history ; *Antibody Diversity ; Biomedical Engineering/*history ; Great Britain ; History, 20th Century ; History, 21st Century ; Humans ; Mice ; Molecular Biology/*history
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Host response. Inflammation-induced disruption of SCS macrophages impairs B cell responses to secondary infection (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-02-07
    Description: The layer of macrophages at the subcapsular sinus (SCS) captures pathogens entering the lymph node, preventing their global dissemination and triggering an immune response. However, how infection affects SCS macrophages remains largely unexplored. Here we show that infection and inflammation disrupt the organization of SCS macrophages in a manner that involves the migration of mature dendritic cells to the lymph node. This disrupted organization reduces the capacity of SCS macrophages to retain and present antigen in a subsequent secondary infection, resulting in diminished B cell responses. Thus, the SCS macrophage layer may act as a sensor or valve during infection to temporarily shut down the lymph node to further antigenic challenge. This shutdown may increase an organism's susceptibility to secondary infections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gaya, Mauro -- Castello, Angelo -- Montaner, Beatriz -- Rogers, Neil -- Reis e Sousa, Caetano -- Bruckbauer, Andreas -- Batista, Facundo D -- Cancer Research UK/United Kingdom -- New York, N.Y. -- Science. 2015 Feb 6;347(6222):667-72. doi: 10.1126/science.aaa1300.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lymphocyte Interaction Laboratory, London Research Institute, Cancer Research UK, 44 Lincoln's Inn Fields, London WC2A 3LY, UK. ; Immunobiology Laboratory, London Research Institute, Cancer Research UK, 44 Lincoln's Inn Fields, London WC2A 3LY, UK. ; Lymphocyte Interaction Laboratory, London Research Institute, Cancer Research UK, 44 Lincoln's Inn Fields, London WC2A 3LY, UK. facundo.batista@cancer.org.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25657250" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens/immunology ; B-Lymphocytes/*immunology/pathology ; Cell Movement/*immunology ; Coinfection/*immunology ; Dendritic Cells/immunology ; Inflammation/*immunology ; Lymph Nodes/immunology/pathology ; Macrophages/*immunology/pathology ; Mice ; Mice, Inbred C57BL ; Staphylococcal Skin Infections/*immunology ; *Staphylococcus aureus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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