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  • Articles  (2)
  • Enzyme-Linked Immunosorbent Assay  (2)
  • Nature. 458(7238): 636-40. doi: 10.1038/nature07930.  (1)
  • Nature. 467(7315): 591-5. doi: 10.1038/nature09385.  (1)
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  • Articles  (2)
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  • 1
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    Broad diversity of neutralizing antibodies isolated from memory B cells in HIV-infected individuals (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-03-17
    Description: Antibodies to conserved epitopes on the human immunodeficiency virus (HIV) surface protein gp140 can protect against infection in non-human primates, and some infected individuals show high titres of broadly neutralizing immunoglobulin (Ig)G antibodies in their serum. However, little is known about the specificity and activity of these antibodies. To characterize the memory antibody responses to HIV, we cloned 502 antibodies from HIV envelope-binding memory B cells from six HIV-infected patients with broadly neutralizing antibodies and low to intermediate viral loads. We show that in these patients, the B-cell memory response to gp140 is composed of up to 50 independent clones expressing high affinity neutralizing antibodies to the gp120 variable loops, the CD4-binding site, the co-receptor-binding site, and to a new neutralizing epitope that is in the same region of gp120 as the CD4-binding site. Thus, the IgG memory B-cell compartment in the selected group of patients with broad serum neutralizing activity to HIV is comprised of multiple clonal responses with neutralizing activity directed against several epitopes on gp120.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scheid, Johannes F -- Mouquet, Hugo -- Feldhahn, Niklas -- Seaman, Michael S -- Velinzon, Klara -- Pietzsch, John -- Ott, Rene G -- Anthony, Robert M -- Zebroski, Henry -- Hurley, Arlene -- Phogat, Adhuna -- Chakrabarti, Bimal -- Li, Yuxing -- Connors, Mark -- Pereyra, Florencia -- Walker, Bruce D -- Wardemann, Hedda -- Ho, David -- Wyatt, Richard T -- Mascola, John R -- Ravetch, Jeffrey V -- Nussenzweig, Michel C -- Howard Hughes Medical Institute/ -- Intramural NIH HHS/ -- England -- Nature. 2009 Apr 2;458(7238):636-40. doi: 10.1038/nature07930. Epub 2009 Mar 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Immunology, The Rockefeller University, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19287373" target="_blank"〉PubMed〈/a〉
    Keywords: Antibody Affinity ; Antigens, CD4/metabolism ; B-Lymphocytes/*immunology ; Binding Sites ; Enzyme-Linked Immunosorbent Assay ; Epitope Mapping ; Epitopes, B-Lymphocyte/chemistry/immunology ; HIV Antibodies/*analysis/*immunology/isolation & purification ; HIV Envelope Protein gp120/chemistry/immunology/metabolism ; HIV Envelope Protein gp41/chemistry/immunology ; HIV Infections/*immunology ; Humans ; Immunologic Memory/*immunology ; Neutralization Tests ; Receptors, HIV/metabolism ; Viral Load ; env Gene Products, Human Immunodeficiency Virus/chemistry/*immunology/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    Polyreactivity increases the apparent affinity of anti-HIV antibodies by heteroligation (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-10-01
    Description: During immune responses, antibodies are selected for their ability to bind to foreign antigens with high affinity, in part by their ability to undergo homotypic bivalent binding. However, this type of binding is not always possible. For example, the small number of gp140 glycoprotein spikes displayed on the surface of the human immunodeficiency virus (HIV) disfavours homotypic bivalent antibody binding. Here we show that during the human antibody response to HIV, somatic mutations that increase antibody affinity also increase breadth and neutralizing potency. Surprisingly, the responding naive and memory B cells produce polyreactive antibodies, which are capable of bivalent heteroligation between one high-affinity anti-HIV-gp140 combining site and a second low-affinity site on another molecular structure on HIV. Although cross-reactivity to self-antigens or polyreactivity is strongly selected against during B-cell development, it is a common serologic feature of certain infections in humans, including HIV, Epstein-Barr virus and hepatitis C virus. Seventy-five per cent of the 134 monoclonal anti-HIV-gp140 antibodies cloned from six patients with high titres of neutralizing antibodies are polyreactive. Despite the low affinity of the polyreactive combining site, heteroligation demonstrably increases the apparent affinity of polyreactive antibodies to HIV.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3699875/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3699875/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mouquet, Hugo -- Scheid, Johannes F -- Zoller, Markus J -- Krogsgaard, Michelle -- Ott, Rene G -- Shukair, Shetha -- Artyomov, Maxim N -- Pietzsch, John -- Connors, Mark -- Pereyra, Florencia -- Walker, Bruce D -- Ho, David D -- Wilson, Patrick C -- Seaman, Michael S -- Eisen, Herman N -- Chakraborty, Arup K -- Hope, Thomas J -- Ravetch, Jeffrey V -- Wardemann, Hedda -- Nussenzweig, Michel C -- 1 P01 AI081677/AI/NIAID NIH HHS/ -- P01 AI081677/AI/NIAID NIH HHS/ -- R01 AI047770/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Sep 30;467(7315):591-5. doi: 10.1038/nature09385.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Immunology, The Rockefeller University, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20882016" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal/immunology ; Antibodies, Neutralizing/immunology ; Antibody Affinity/genetics/*immunology ; Antigen-Antibody Reactions/genetics/*immunology ; Cardiolipins/immunology ; Cell Line, Tumor ; Cross Reactions/genetics/immunology ; Enzyme-Linked Immunosorbent Assay ; Epitopes/*chemistry/*immunology ; HIV Antibodies/genetics/*immunology ; HIV Antigens/chemistry/*immunology ; HIV-1/chemistry/*immunology ; Humans ; Immunoglobulin Fab Fragments/genetics/immunology ; Immunoglobulin Heavy Chains/genetics/immunology ; Mutation ; Surface Plasmon Resonance ; env Gene Products, Human Immunodeficiency Virus/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
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