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Bondareva M, Budzinski L, Durek P, Witkowski M, Angermair S, Ninnemann J, Kreye J, Letz P, Ferreira-Gomes M, Semin I, Guerra GM, Momsen Reincke S, Sánchez-Sendin E, Yilmaz S, Sempert T, Heinz GA, Tizian C, Raftery M, Schönrich G, Matyushkina D, Smirnov IV, Govorun VM, Schrezenmeier E, Stefanski AL, Dörner T, Zocche S, Viviano E, Klement N, Sehmsdorf KJ, Lunin A, Chang HD, Drutskaya M, Kozlovskaya L, Treskatsch S, Radbruch A, Diefenbach A, Prüss H, Enghard P, Mashreghi MF, Kruglov AA. Cross-regulation of antibody responses against the SARS-CoV-2 Spike protein and commensal microbiota via molecular mimicry. Cell Host Microbe 2023; 31:1866-1881.e10. [PMID: 37944493 DOI: 10.1016/j.chom.2023.10.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 07/11/2023] [Accepted: 10/06/2023] [Indexed: 11/12/2023]
Abstract
The commensal microflora provides a repertoire of antigens that illicit mucosal antibodies. In some cases, these antibodies can cross-react with host proteins, inducing autoimmunity, or with other microbial antigens. We demonstrate that the oral microbiota can induce salivary anti-SARS-CoV-2 Spike IgG antibodies via molecular mimicry. Anti-Spike IgG antibodies in the saliva correlated with enhanced abundance of Streptococcus salivarius 1 month after anti-SARS-CoV-2 vaccination. Several human commensal bacteria, including S. salivarius, were recognized by SARS-CoV-2-neutralizing monoclonal antibodies and induced cross-reactive anti-Spike antibodies in mice, facilitating SARS-CoV-2 clearance. A specific S. salivarius protein, RSSL-01370, contains regions with homology to the Spike receptor-binding domain, and immunization of mice with RSSL-01370 elicited anti-Spike IgG antibodies in the serum. Additionally, oral S. salivarius supplementation enhanced salivary anti-Spike antibodies in vaccinated individuals. Altogether, these data show that distinct species of the human microbiota can express molecular mimics of SARS-CoV-2 Spike protein, potentially enhancing protective immunity.
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Affiliation(s)
- Marina Bondareva
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany; Belozersky Institute of Physico-Chemical Biology and Faculty of Bioengineering and Bioinformatics, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia
| | - Lisa Budzinski
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Pawel Durek
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Mario Witkowski
- Berlin Institute of Health (BIH), 10178 Berlin, Germany; Laboratory of Innate Immunity, Department of Microbiology and Infection Immunology, Charité-Universitätsmedizin Berlin, 12203 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Stefan Angermair
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine, Charité Campus Benjamin Franklin, Berlin, Germany
| | - Justus Ninnemann
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Jakob Kreye
- Berlin Institute of Health (BIH), 10178 Berlin, Germany; German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany; Helmholtz Innovation Lab BaoBab (Brain Antibody-omics and B-cell Lab), 10117 Berlin, Germany; Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Berlin, and Berlin Institute of Health, 10117 Berlin, Germany; Department of Pediatric Neurology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Philine Letz
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Marta Ferreira-Gomes
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Iaroslav Semin
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany; Belozersky Institute of Physico-Chemical Biology and Faculty of Bioengineering and Bioinformatics, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia
| | - Gabriela Maria Guerra
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - S Momsen Reincke
- Berlin Institute of Health (BIH), 10178 Berlin, Germany; German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany; Helmholtz Innovation Lab BaoBab (Brain Antibody-omics and B-cell Lab), 10117 Berlin, Germany; Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Elisa Sánchez-Sendin
- German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany; Helmholtz Innovation Lab BaoBab (Brain Antibody-omics and B-cell Lab), 10117 Berlin, Germany; Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Selin Yilmaz
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Toni Sempert
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Gitta Anne Heinz
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Caroline Tizian
- Berlin Institute of Health (BIH), 10178 Berlin, Germany; Laboratory of Innate Immunity, Department of Microbiology and Infection Immunology, Charité-Universitätsmedizin Berlin, 12203 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Martin Raftery
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Günther Schönrich
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Daria Matyushkina
- Scientific Research Institute for Systems Biology and Medicine, Scientific Driveway, 18, 117246 Moscow, Russia
| | - Ivan V Smirnov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
| | - Vadim M Govorun
- Scientific Research Institute for Systems Biology and Medicine, Scientific Driveway, 18, 117246 Moscow, Russia
| | - Eva Schrezenmeier
- Berlin Institute of Health (BIH), 10178 Berlin, Germany; Department of Nephrology and Intensive Care Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Anna-Luisa Stefanski
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany; Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Thomas Dörner
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany; Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Silvia Zocche
- Departments of Pediatric Gastroenterology, Nephrology and Metabolic Diseases, Charité University Medicine, 10117 Berlin, Germany
| | - Edoardo Viviano
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin and Berlin Institute of Health, Institute of Physiology, Center for Space Medicine and Extreme Environments Berlin, 10117 Berlin, Germany
| | - Nele Klement
- Department of Nephrology and Intensive Care Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Katharina Johanna Sehmsdorf
- Department of Nephrology and Intensive Care Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Alexander Lunin
- Chumakov Scientific Center for Research and Development of Immune-and-Biological Products, Russian Academy of Sciences (Institute of Poliomyelitis), 108819 Moscow, Russia
| | - Hyun-Dong Chang
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany; Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany
| | - Marina Drutskaya
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Liubov Kozlovskaya
- Chumakov Scientific Center for Research and Development of Immune-and-Biological Products, Russian Academy of Sciences (Institute of Poliomyelitis), 108819 Moscow, Russia; Institute for Translational Medicine and Biotechnology, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Sascha Treskatsch
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine, Charité Campus Benjamin Franklin, Berlin, Germany
| | - Andreas Radbruch
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany; Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Andreas Diefenbach
- Berlin Institute of Health (BIH), 10178 Berlin, Germany; Laboratory of Innate Immunity, Department of Microbiology and Infection Immunology, Charité-Universitätsmedizin Berlin, 12203 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Harald Prüss
- German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany; Helmholtz Innovation Lab BaoBab (Brain Antibody-omics and B-cell Lab), 10117 Berlin, Germany; Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Philipp Enghard
- Department of Nephrology and Intensive Care Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
| | - Mir-Farzin Mashreghi
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany
| | - Andrey A Kruglov
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, 10117 Berlin, Germany; Belozersky Institute of Physico-Chemical Biology and Faculty of Bioengineering and Bioinformatics, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia; Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; Biological Faculty, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia.
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Nguyen K, Li K, Flores K, Tomaras GD, Dennison SM, McCarthy JM. Parameter estimation and identifiability analysis for a bivalent analyte model of monoclonal antibody-antigen binding. Anal Biochem 2023; 679:115263. [PMID: 37549723 PMCID: PMC10511885 DOI: 10.1016/j.ab.2023.115263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 07/10/2023] [Accepted: 07/23/2023] [Indexed: 08/09/2023]
Abstract
Surface plasmon resonance (SPR) is an extensively used technique to characterize antigen-antibody interactions. Affinity measurements by SPR typically involve testing the binding of antigen in solution to monoclonal antibodies (mAbs) immobilized on a chip and fitting the kinetics data using 1:1 Langmuir binding model to derive rate constants. However, when it is necessary to immobilize antigens instead of the mAbs, a bivalent analyte (1:2) binding model is required for kinetics analysis. This model is lacking in data analysis packages associated with high throughput SPR instruments and the packages containing this model do not explore multiple local minima and parameter identifiability issues that are common in non-linear optimization. Therefore, we developed a method to use a system of ordinary differential equations for analyzing 1:2 binding kinetics data. Salient features of this method include a grid search on parameter initialization and a profile likelihood approach to determine parameter identifiability. Using this method we found a non-identifiable parameter in data set collected under the standard experimental design. A simulation-guided improved experimental design led to reliable estimation of all rate constants. The method and approach developed here for analyzing 1:2 binding kinetics data will be valuable for expeditious therapeutic antibody discovery research.
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Affiliation(s)
- Kyle Nguyen
- Biomathematics Graduate Program, North Carolina State University, Raleigh, 27607, NC, USA; Center for Research in Scientific Computation, North Carolina State University, Raleigh, 27607, NC, USA.
| | - Kan Li
- Center for Human Systems Immunology, Duke University, Durham, 27701, NC, USA; Department of Surgery, Duke University, Durham, 27710, NC, USA
| | - Kevin Flores
- Center for Research in Scientific Computation, North Carolina State University, Raleigh, 27607, NC, USA; Department of Mathematics, North Carolina State University, Raleigh, 27607, NC, USA
| | - Georgia D Tomaras
- Center for Human Systems Immunology, Duke University, Durham, 27701, NC, USA; Department of Surgery, Duke University, Durham, 27710, NC, USA; Department of Integrative Immunobiology, Duke University, Durham, 27710, NC, USA; Department of Molecular Genetics and Microbiology, Duke University, Durham, 27710, NC, USA; Duke Human Vaccine Institute, Duke University, Durham, 27710, NC, USA
| | - S Moses Dennison
- Center for Human Systems Immunology, Duke University, Durham, 27701, NC, USA; Department of Surgery, Duke University, Durham, 27710, NC, USA
| | - Janice M McCarthy
- Center for Human Systems Immunology, Duke University, Durham, 27701, NC, USA; Department of Biostatistics and Bioinformatics, Duke University, Durham, 27710, NC, USA
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Planchais C, Kök A, Kanyavuz A, Lorin V, Bruel T, Guivel-Benhassine F, Rollenske T, Prigent J, Hieu T, Prazuck T, Lefrou L, Wardemann H, Schwartz O, Dimitrov JD, Hocqueloux L, Mouquet H. HIV-1 Envelope Recognition by Polyreactive and Cross-Reactive Intestinal B Cells. Cell Rep 2020; 27:572-585.e7. [PMID: 30970259 PMCID: PMC6458971 DOI: 10.1016/j.celrep.2019.03.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 02/19/2019] [Accepted: 03/08/2019] [Indexed: 12/18/2022] Open
Abstract
Mucosal immune responses to HIV-1 involve the recognition of the viral envelope glycoprotein (gp)160 by tissue-resident B cells and subsequent secretion of antibodies. To characterize the B cells “sensing” HIV-1 in the gut of infected individuals, we probed monoclonal antibodies produced from single intestinal B cells binding to recombinant gp140 trimers. A large fraction of mucosal B cell antibodies were polyreactive and showed only low affinity to HIV-1 envelope glycoproteins, particularly the gp41 moiety. A few high-affinity gp140 antibodies were isolated but lacked neutralizing, potent ADCC, and transcytosis-blocking capacities. Instead, they displayed cross-reactivity with defined self-antigens. Specifically, intestinal HIV-1 gp41 antibodies targeting the heptad repeat 2 region (HR2) cluster II cross-reacted with the p38α mitogen-activated protein kinase 14 (MAPK14). Hence, physiologic polyreactivity of intestinal B cells and molecular mimicry-based self-reactivity of HIV-1 antibodies are two independent phenomena, possibly diverting and/or impairing mucosal humoral immunity to HIV-1. Polyreactive B cells in HIV-1+ intestinal mucosa interact with HIV-1 Env proteins High-affinity intestinal HIV-1 gp140 antibodies display poor antiviral activities Antibodies targeting the gp41 cluster II region cross-react with MAPK14
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Affiliation(s)
- Cyril Planchais
- Laboratory of Humoral Immunology, Department of Immunology, Institut Pasteur, Paris 75015, France; INSERM U1222, Paris 75015, France
| | - Ayrin Kök
- Laboratory of Humoral Immunology, Department of Immunology, Institut Pasteur, Paris 75015, France; INSERM U1222, Paris 75015, France
| | - Alexia Kanyavuz
- Sorbonne Universités, UPMC Université Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers, Paris 75006, France; INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, Paris 75006, France; Université Paris Descartes, Sorbonne Paris Cité, UMR_S 1138, Centre de Recherche des Cordeliers, Paris 75006, France
| | - Valérie Lorin
- Laboratory of Humoral Immunology, Department of Immunology, Institut Pasteur, Paris 75015, France; INSERM U1222, Paris 75015, France
| | - Timothée Bruel
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris 75015, France; CNRS URA3015, Paris, 75015, France
| | - Florence Guivel-Benhassine
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris 75015, France; CNRS URA3015, Paris, 75015, France
| | - Tim Rollenske
- Division of B Cell Immunology, German Cancer Research Center, Heidelberg 69120, Germany
| | - Julie Prigent
- Laboratory of Humoral Immunology, Department of Immunology, Institut Pasteur, Paris 75015, France; INSERM U1222, Paris 75015, France
| | - Thierry Hieu
- Laboratory of Humoral Immunology, Department of Immunology, Institut Pasteur, Paris 75015, France; INSERM U1222, Paris 75015, France
| | - Thierry Prazuck
- Service des Maladies Infectieuses et Tropicales, CHR d'Orléans-La Source, Orléans 45067, France
| | - Laurent Lefrou
- Service d'Hépato-Gastro-Entérologie, CHR d'Orléans-La Source, Orléans 45067, France
| | - Hedda Wardemann
- Division of B Cell Immunology, German Cancer Research Center, Heidelberg 69120, Germany
| | - Olivier Schwartz
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, Paris 75015, France; CNRS URA3015, Paris, 75015, France
| | - Jordan D Dimitrov
- Sorbonne Universités, UPMC Université Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers, Paris 75006, France; INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, Paris 75006, France; Université Paris Descartes, Sorbonne Paris Cité, UMR_S 1138, Centre de Recherche des Cordeliers, Paris 75006, France
| | - Laurent Hocqueloux
- Service des Maladies Infectieuses et Tropicales, CHR d'Orléans-La Source, Orléans 45067, France
| | - Hugo Mouquet
- Laboratory of Humoral Immunology, Department of Immunology, Institut Pasteur, Paris 75015, France; INSERM U1222, Paris 75015, France.
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Bridging Vaccine-Induced HIV-1 Neutralizing and Effector Antibody Responses in Rabbit and Rhesus Macaque Animal Models. J Virol 2019; 93:JVI.02119-18. [PMID: 30842326 PMCID: PMC6498063 DOI: 10.1128/jvi.02119-18] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 02/20/2019] [Indexed: 12/13/2022] Open
Abstract
Nonneutralizing antibody functions have been associated with reduced infection risk, or control of virus replication, for HIV-1 and related viruses. It is therefore critical to evaluate development of these responses throughout all stages of preclinical testing. Rabbits are conventionally used to evaluate the ability of vaccine candidates to safely elicit antibodies that bind and neutralize HIV-1. However, it remained unexplored how effectively rabbits model the development of nonneutralizing antibody responses in primates. We administered identical HIV-1 vaccine regimens to rabbits and rhesus macaques and performed detailed comparisons of vaccine-induced antibody responses. We demonstrated that nonneutralizing HIV-specific antibody responses can be studied in the rabbit model and have identified aspects of these responses that are common, and those that are unique, to rabbits and rhesus macaques. Our findings will help determine how to best utilize preclinical rabbit and rhesus macaque models to accelerate HIV vaccine candidate testing in human trials. Studies in animal models are essential prerequisites for clinical trials of candidate HIV vaccines. Small animals, such as rabbits, are used to evaluate promising strategies prior to further immunogenicity and efficacy testing in nonhuman primates. Our goal was to determine how HIV-specific vaccine-elicited antibody responses, epitope specificity, and Fc-mediated functions in the rabbit model can predict those in the rhesus macaque (RM) model. Detailed comparisons of the HIV-1-specific IgG response were performed on serum from rabbits and RM given identical modified vaccinia virus Ankara-prime/gp120-boost immunization regimens. We found that vaccine-induced neutralizing antibody, gp120-binding antibody levels and immunodominant specificities, antibody-dependent cellular phagocytosis of HIV-1 virions, and antibody-dependent cellular cytotoxicity (ADCC) responses against gp120-coated target cells were similar in rabbits and RM. However, we also identified characteristics of humoral immunity that differed across species. ADCC against HIV-infected target cells was elicited in rabbits but not in RM, and we observed differences among subdominantly targeted epitopes. Human Fc receptor binding assays and analysis of antibody-cell interactions indicated that rabbit vaccine-induced antibodies effectively recruited and activated human natural killer cells, while vaccine-elicited RM antibodies were unable to activate either human or RM NK cells. Thus, our data demonstrate that both Fc-independent and Fc-dependent functions of rabbit antibodies can be measured with commonly used in vitro assays; however, the ability of immunogenicity studies performed in rabbits to predict responses in RM will vary depending on the particular immune parameter of interest. IMPORTANCE Nonneutralizing antibody functions have been associated with reduced infection risk, or control of virus replication, for HIV-1 and related viruses. It is therefore critical to evaluate development of these responses throughout all stages of preclinical testing. Rabbits are conventionally used to evaluate the ability of vaccine candidates to safely elicit antibodies that bind and neutralize HIV-1. However, it remained unexplored how effectively rabbits model the development of nonneutralizing antibody responses in primates. We administered identical HIV-1 vaccine regimens to rabbits and rhesus macaques and performed detailed comparisons of vaccine-induced antibody responses. We demonstrated that nonneutralizing HIV-specific antibody responses can be studied in the rabbit model and have identified aspects of these responses that are common, and those that are unique, to rabbits and rhesus macaques. Our findings will help determine how to best utilize preclinical rabbit and rhesus macaque models to accelerate HIV vaccine candidate testing in human trials.
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Rare Detection of Antiviral Functions of Polyclonal IgA Isolated from Plasma and Breast Milk Compartments in Women Chronically Infected with HIV-1. J Virol 2019; 93:JVI.02084-18. [PMID: 30700599 PMCID: PMC6430545 DOI: 10.1128/jvi.02084-18] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 01/15/2019] [Indexed: 02/06/2023] Open
Abstract
The humoral response to invading mucosal pathogens comprises multiple antibody isotypes derived from systemic and mucosal compartments. To understand the contribution of each antibody isotype/source to the mucosal humoral response, parallel investigation of the specificities and functions of antibodies within and across isotypes and compartments is required. The role of IgA against HIV-1 is complex, with studies supporting a protective role as well as a role for serum IgA in blocking effector functions. Thus, we explored the fine specificity and function of IgA in both plasma and mucosal secretions important to infant HIV-1 infection, i.e., breast milk. IgA and IgG were isolated from milk and plasma from 20 HIV-1-infected lactating Malawian women. HIV-1 binding specificities, neutralization potency, inhibition of virus-epithelial cell binding, and antibody-mediated phagocytosis were measured. Fine-specificity mapping showed IgA and IgG responses to multiple HIV-1 Env epitopes, including conformational V1/V2 and linear V2, V3, and constant region 5 (C5). Env IgA was heterogeneous between the milk and systemic compartments (Env IgA, τ = 0.00 to 0.63, P = 0.0046 to 1.00). Furthermore, IgA and IgG appeared compartmentalized as there was a lack of correlation between the specificities of Env-specific IgA and IgG (in milk, τ = -0.07 to 0.26, P = 0.35 to 0.83). IgA and IgG also differed in functions: while neutralization and phagocytosis were consistently mediated by milk and plasma IgG, they were rarely detected in IgA from both milk and plasma. Understanding the ontogeny of the divergent IgG and IgA antigen specificity repertoires and their effects on antibody function will inform vaccination approaches targeted toward mucosal pathogens.IMPORTANCE Antibodies within the mucosa are part of the first line of defense against mucosal pathogens. Evaluating mucosal antibody isotypes, specificities, and antiviral functions in relationship to the systemic antibody profile can provide insights into whether the antibody response is coordinated in response to mucosal pathogens. In a natural immunity cohort of HIV-infected lactating women, we mapped the fine specificity and function of IgA in breast milk and plasma and compared these with the autologous IgG responses. Antigen specificities and functions differed between IgG and IgA, with antiviral functions (neutralization and phagocytosis) predominantly mediated by the IgG fraction in both milk and plasma. Furthermore, the specificity of milk IgA differed from that of systemic IgA. Our data suggest that milk IgA and systemic IgA should be separately examined as potential correlates of risk. Preventive vaccines may need to employ different strategies to elicit functional antiviral immunity by both antibody isotypes in the mucosa.
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Polyclonal HIV envelope-specific breast milk antibodies limit founder SHIV acquisition and cell-associated virus loads in infant rhesus monkeys. Mucosal Immunol 2018; 11:1716-1726. [PMID: 30115994 PMCID: PMC6420805 DOI: 10.1038/s41385-018-0067-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 06/18/2018] [Accepted: 06/23/2018] [Indexed: 02/04/2023]
Abstract
Breast milk HIV-1 transmission is currently the predominant contributor to pediatric HIV infections. Yet, only ~10% of breastfeeding infants born to untreated HIV-infected mothers become infected. This study assessed the protective capacity of natural HIV envelope-specific antibodies isolated from the milk of HIV-infected women in an infant rhesus monkey (RM), tier 2 SHIV oral challenge model. To mimic placental and milk maternal antibody transfer, infant RMs were i.v. infused and orally treated at the time of challenge with a single weakly neutralizing milk monoclonal antibody (mAb), a tri-mAb cocktail with weakly neutralizing and ADCC functionalities, or an anti-influenza control mAb. Of these groups, the fewest tri-mAb-treated infants had SHIV detectable in plasma or tissues (2/6, 5/6, and 7/8 animals infected in tri-mAb, single-mAb, and control-mAb groups, respectively). Tri-mAb-treated infants demonstrated significantly fewer plasma transmitted/founder variants and reduced peripheral CD4+ T cell proviral loads at 8 weeks post-challenge compared to control mAb-treated infants. Abortive infection was observed as detectable CD4+ T cell provirus in non-viremic control mAb- and single mAb-, but not in tri-mAb-treated animals. These results suggest that polyfunctional milk antibodies contribute to the natural inefficiency of HIV-1 transmission through breastfeeding and infant vaccinations eliciting non-neutralizing antibody responses could reduce postnatal HIV transmission.
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Abstract
PURPOSE OF REVIEW A successful human immunodeficiency virus-type 1 (HIV-1) vaccine will require immunogens that induce protective immune responses. However, recent studies suggest that the response to HIV-1 and perhaps other viruses may be altered by immune system exposure to intestinal microbiota-antigens. This review will discuss select aspects of these studies. RECENT FINDINGS Naïve CD4 T and B cell repertoires can be imprinted by intestinal microbiota-antigens to respond to virus epitopes prior to virus infection. A multiclade envelope (Env) gp145 DNA prime, recombinant adenovirus type 5 boost vaccine tested in a HIV Vaccine Trials Network (HVTN) phase IIb human vaccine efficacy trial (HVTN 505) induced a dominant gp41-reactive antibody response that was non-neutralizing and cross-reactive with intestinal microbiota. This vaccine regimen also induced a dominant gp41-reactive, intestinal microbiota-cross-reactive gp41 antibody response in neonatal and adult Rhesus macaques. Studies of naïve CD4 T cells have demonstrated cross-reactivity to both HIV-1 and influenza peptides. SUMMARY HIV-1 Env vaccine-induced CD4 T and B cell responses can originate from a pool of intestinal microbiota-cross-reactive immune cells. Moreover, intestinal microbiota-cross-reactive HIV-1 Env antibodies are ineffective in protection against HIV-1 infection. Thus, intestinal microbiota-imprinting of the B cell repertoire may be one of several roadblocks to the induction of protective HIV-1 antibodies.
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Pollara J, Orlandi C, Beck C, Edwards RW, Hu Y, Liu S, Wang S, Koup RA, Denny TN, Lu S, Tomaras GD, DeVico A, Lewis GK, Ferrari G. Application of area scaling analysis to identify natural killer cell and monocyte involvement in the GranToxiLux antibody dependent cell-mediated cytotoxicity assay. Cytometry A 2018; 93:436-447. [PMID: 29498807 PMCID: PMC5969088 DOI: 10.1002/cyto.a.23348] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/31/2018] [Accepted: 02/04/2018] [Indexed: 01/14/2023]
Abstract
Several different assay methodologies have been described for the evaluation of HIV or SIV-specific antibody-dependent cell-mediated cytotoxicity (ADCC). Commonly used assays measure ADCC by evaluating effector cell functions, or by detecting elimination of target cells. Signaling through Fc receptors, cellular activation, cytotoxic granule exocytosis, or accumulation of cytolytic and immune signaling factors have been used to evaluate ADCC at the level of the effector cells. Alternatively, assays that measure killing or loss of target cells provide a direct assessment of the specific killing activity of antibodies capable of ADCC. Thus, each of these two distinct types of assays provides information on only one of the critical components of an ADCC event; either the effector cells involved, or the resulting effect on the target cell. We have developed a simple modification of our previously described high-throughput ADCC GranToxiLux (GTL) assay that uses area scaling analysis (ASA) to facilitate simultaneous quantification of ADCC activity at the target cell level, and assessment of the contribution of natural killer cells and monocytes to the total observed ADCC activity when whole human peripheral blood mononuclear cells are used as a source of effector cells. The modified analysis method requires no additional reagents and can, therefore, be easily included in prospective studies. Moreover, ASA can also often be applied to pre-existing ADCC-GTL datasets. Thus, incorporation of ASA to the ADCC-GTL assay provides an ancillary assessment of the ability of natural and vaccine-induced antibodies to recruit natural killer cells as well as monocytes against HIV or SIV; or to any other field of research for which this assay is applied. © 2018 The Authors. Cytometry Part A published by Wiley Periodicals, Inc. on behalf of ISAC.
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Affiliation(s)
- Justin Pollara
- Department of SurgeryDuke University School of MedicineDurhamNorth Carolina
| | - Chiara Orlandi
- Institute of Human VirologyUniversity of Maryland School of MedicineBaltimoreMaryland
| | - Charles Beck
- Department of SurgeryDuke University School of MedicineDurhamNorth Carolina
| | - R. Whitney Edwards
- Department of SurgeryDuke University School of MedicineDurhamNorth Carolina
| | - Yi Hu
- Institute of Human VirologyUniversity of Maryland School of MedicineBaltimoreMaryland
| | - Shuying Liu
- Department of MedicineUniversity of Massachusetts Medical SchoolWorcesterMassachusetts
| | - Shixia Wang
- Department of MedicineUniversity of Massachusetts Medical SchoolWorcesterMassachusetts
| | - Richard A. Koup
- Vaccine Research CenterNational Institute of Allergy and Infectious Diseases, National Institutes of HealthBethesdaMaryland
| | - Thomas N. Denny
- Duke Human Vaccine Institute, Duke University School of MedicineDurhamNorth Carolina
| | - Shan Lu
- Department of MedicineUniversity of Massachusetts Medical SchoolWorcesterMassachusetts
| | - Georgia D. Tomaras
- Department of SurgeryDuke University School of MedicineDurhamNorth Carolina
| | - Anthony DeVico
- Institute of Human VirologyUniversity of Maryland School of MedicineBaltimoreMaryland
| | - George K. Lewis
- Institute of Human VirologyUniversity of Maryland School of MedicineBaltimoreMaryland
| | - Guido Ferrari
- Department of SurgeryDuke University School of MedicineDurhamNorth Carolina
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Wines BD, Billings H, Mclean MR, Kent SJ, Hogarth PM. Antibody Functional Assays as Measures of Fc Receptor-Mediated Immunity to HIV - New Technologies and their Impact on the HIV Vaccine Field. Curr HIV Res 2018; 15:202-215. [PMID: 28322167 PMCID: PMC5543561 DOI: 10.2174/1570162x15666170320112247] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 02/20/2017] [Accepted: 03/09/2017] [Indexed: 12/23/2022]
Abstract
Background: There is now intense interest in the role of HIV-specific antibodies and the engagement of FcγR functions in the control and prevention of HIV infection. The analyses of the RV144 vaccine trial, natural progression cohorts, and macaque models all point to a role for Fc-dependent effector functions, such as cytotoxicity (ADCC) or phagocytosis (ADCP), in the control of HIV. However, reliable assays that can be reproducibly used across different laboratories to measure Fc-dependent functions, such as antibody dependent cellular cytotoxicity (ADCC) are limited. Method: This brief review highlights the importance of Fc properties for immunity to HIV, particular-ly via FcγR diversity and function. We discuss assays used to study FcR mediated functions of HIV-specific Ab, including our recently developed novel cell-free ELISA using homo-dimeric FcγR ecto-domains to detect functionally relevant viral antigen-specific antibodies. Results: The binding of these dimeric FcγR ectodomains, to closely spaced pairs of IgG Fc, mimics the engagement and cross-linking of Fc receptors by IgG opsonized virions or infected cells as the es-sential prerequisite to the induction of Ab-dependent effector functions. The dimeric FcγR ELISA reli-ably correlates with ADCC in patient responses to influenza. The assay is amenable to high throughput and could be standardized across laboratories. Conclusion: We propose the assay has broader implications for the evaluation of the quality of anti-body responses in viral infections and for the rapid evaluation of responses in vaccine development campaigns for HIV and other viral infections.
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Affiliation(s)
- Bruce D Wines
- Centre for Biomedical Research, Burnet Institute, Melbourne, Vic 3004, Australia.,Department of Immunology, Monash University Central Clinical School, Melbourne, Victoria 3004, Australia.,Department of Pathology, The University of Melbourne, Victoria, 3010, Australia
| | - Hugh Billings
- Centre for Biomedical Research, Burnet Institute, Melbourne, Vic 3004, Australia
| | - Milla R Mclean
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Parkville, Victoria, Australia
| | - Stephen J Kent
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Parkville, Victoria, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Melbourne, Parkville, Victoria, Australia.,Melbourne Sexual Health Centre, Infectious Diseases Department, Alfred Health, Central Clinical School, Monash University, Victoria, Australia
| | - P Mark Hogarth
- Centre for Biomedical Research, Burnet Institute, Melbourne, Vic 3004, Australia.,Department of Immunology, Monash University Central Clinical School, Melbourne, Victoria 3004, Australia.,Department of Pathology, The University of Melbourne, Victoria, 3010, Australia
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Do the Microbiota Influence Vaccines and Protective Immunity to Pathogens? Engaging Our Endogenous Adjuvants. Cold Spring Harb Perspect Biol 2018; 10:cshperspect.a028860. [PMID: 28432130 DOI: 10.1101/cshperspect.a028860] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The reliance of the immune system on constitutive microbial stimulation support the idea that both responsiveness to vaccines and vaccine design need to be considered in the context of host-microbiota interactions. Manipulation of microbe function or composition via diet alteration or microbiota engraftment may soon become a viable approach to control immunity and, as such, vaccine responses. Learning from our endogenous original adjuvants could be critical in overcoming the enormous hurdle of vaccine design against the numerous pathogens that cause chronic infection. Going forward, rationally designed vaccines that take advantage of the inherent adjuvant properties of the microbiota could have a major impact on the prevention of disease.
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Belkaid Y, Harrison OJ. Homeostatic Immunity and the Microbiota. Immunity 2017; 46:562-576. [PMID: 28423337 DOI: 10.1016/j.immuni.2017.04.008] [Citation(s) in RCA: 712] [Impact Index Per Article: 101.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 04/04/2017] [Accepted: 04/05/2017] [Indexed: 12/27/2022]
Abstract
The microbiota plays a fundamental role in the induction, education, and function of the host immune system. In return, the host immune system has evolved multiple means by which to maintain its symbiotic relationship with the microbiota. The maintenance of this dialogue allows the induction of protective responses to pathogens and the utilization of regulatory pathways involved in the sustained tolerance to innocuous antigens. The ability of microbes to set the immunological tone of tissues, both locally and systemically, requires tonic sensing of microbes and complex feedback loops between innate and adaptive components of the immune system. Here we review the dominant cellular mediators of these interactions and discuss emerging themes associated with our current understanding of the homeostatic immunological dialogue between the host and its microbiota.
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Affiliation(s)
- Yasmine Belkaid
- Mucosal Immunology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA; NIAID Microbiome Program, NIH, Bethesda, MD 20892, USA.
| | - Oliver J Harrison
- Mucosal Immunology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
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The Impact of the Gut Microbiota on Humoral Immunity to Pathogens and Vaccination in Early Infancy. PLoS Pathog 2016; 12:e1005997. [PMID: 28006021 PMCID: PMC5179050 DOI: 10.1371/journal.ppat.1005997] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Combined HIV-1 Envelope Systemic and Mucosal Immunization of Lactating Rhesus Monkeys Induces a Robust Immunoglobulin A Isotype B Cell Response in Breast Milk. J Virol 2016; 90:4951-4965. [PMID: 26937027 DOI: 10.1128/jvi.00335-16] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 02/24/2016] [Indexed: 01/01/2023] Open
Abstract
UNLABELLED Maternal vaccination to induce anti-HIV immune factors in breast milk is a potential intervention to prevent postnatal HIV-1 mother-to-child transmission (MTCT). We previously demonstrated that immunization of lactating rhesus monkeys with a modified vaccinia Ankara (MVA) prime/intramuscular (i.m.) protein boost regimen induced functional IgG responses in milk, while MVA prime/intranasal (i.n.) boost induced robust milk Env-specific IgA responses. Yet, recent studies have suggested that prevention of postnatal MTCT may require both Env-specific IgA and functional IgG responses in milk. Thus, to investigate whether both responses could be elicited by a combined systemic/mucosal immunization strategy, animals previously immunized with the MVA prime/i.n. boost regimen received an i.n./i.m. combined C.1086 gp120 boost. Remarkably, high-magnitude Env-specific IgA responses were observed in milk, surpassing those in plasma. Furthermore, 29% of vaccine-elicited Env-specific B cells isolated from breast milk were IgA isotype, in stark contrast to the overwhelming predominance of IgG isotype Env-specific B cells in breast milk of chronically HIV-infected women. A clonal relationship was identified between Env-specific blood and breast milk B cells, suggesting trafficking of that cell population between the two compartments. Furthermore, IgA and IgG monoclonal antibodies isolated from Env-specific breast milk B cells demonstrated diverse Env epitope specificities and multiple effector functions, including tier 1 neutralization, antibody-dependent cellular cytotoxicity (ADCC), infected cell binding, and inhibition of viral attachment to epithelial cells. Thus, maternal i.n./i.m. combined immunization is a novel strategy to enhance protective Env-specific IgA in milk, which is subsequently transferred to the infant via breastfeeding. IMPORTANCE Efforts to increase the availability of antiretroviral therapy to pregnant and breastfeeding women in resource-limited areas have proven remarkably successful at reducing HIV vertical transmission rates. However, more than 200,000 children are infected annually due to failures in therapy implementation, monitoring, and adherence, nearly half by postnatal HIV exposure via maternal breast milk. Intriguingly, in the absence of antiretroviral therapy, only 10% of breastfed infants born to HIV-infected mothers acquire the virus, suggesting the existence of naturally protective immune factors in milk. Enhancement of these protective immune factors through maternal vaccination will be a critical strategy to reduce the global pediatric AIDS epidemic. We have previously demonstrated that a high magnitude of HIV Env-specific IgA in milk correlates with reduced risk of infant HIV acquisition. In this study, we describe a novel HIV vaccine regimen that induces potent IgA responses in milk and therefore could potentially protect against breast milk HIV MTCT.
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