1
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Vanetti C, Lampasona V, Stracuzzi M, Fenizia C, Biasin M, Saulle I, Limanaqi F, Abdelsalam A, Loretelli C, Paradiso L, Longoni E, Barcellini L, Piemonti L, Marzinotto I, Dispinseri S, Amendola A, Fappani C, Tanzi E, Clerici MS, Scarlatti G, Zuccotti GV, Giacomet V, Trabattoni D. The Immunological Profile of SARS-CoV-2 Infection in Children Is Linked to Clinical Severity and Age. Int J Mol Sci 2023; 24:ijms24076779. [PMID: 37047752 PMCID: PMC10095251 DOI: 10.3390/ijms24076779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/25/2023] [Accepted: 03/31/2023] [Indexed: 04/08/2023] Open
Abstract
Coronavirus disease 19 (COVID-19) is clinically less severe in children, even if the wide variety and degree of severity of symptoms reported in children pose a still-unresolved challenge for clinicians. We performed an in-depth analysis of the immunological profiles of 18 hospitalized SARS-CoV-2-infected children, whose results were compared to those obtained from 13 age- and sex-matched healthy controls (HC). The patients were categorized as paucisymptomatic/moderate (55.6%) or severe/critical (44.5%) according to established diagnostic criteria and further stratified into the categories of infants (1–12 months), children (1–12 years), and adolescents (>12 years). We assessed SARS-CoV-2-specific RBD antibodies (Ab), neutralizing antibodies (nAb), and circulating cytokines/chemokines in the plasma, and the SARS-CoV-2-specific immune response was measured in PBMCs by gene expression and secretome analyses. Our results showed peculiar circulating cytokine/chemokine profiles among patients sharing a similar clinical phenotype. A cluster of patients consisting of infants with severe symptoms presented hyperinflammatory profiles, together with extremely polarized antibody profiles. In a second cluster consisting of paucisymptomatic patients, a less pronounced increase in the level of inflammatory cytokines, together with an association between the selected cytokines and humoral responses, was observed. A third cluster, again consisting of paucisymptomatic patients, showed a circulating cytokine/chemokine profile which overlapped with that of the HC. The SARS-CoV-2-stimulated production of pro-inflammatory proteins, T lymphocyte activation, and migration-specific proteins, were significantly increased in SARS-CoV-2-infected children compared to the HC. Our findings suggest that immune response activation in the course of SARS-CoV-2 infection in children is directly correlated with clinical severity and, to a lesser extent, age.
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Affiliation(s)
- Claudia Vanetti
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
| | - Vito Lampasona
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | - Marta Stracuzzi
- Paediatric Infectious Disease Unit, Ospedale L. Sacco, 20157 Milan, Italy
| | - Claudio Fenizia
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, 20122 Milan, Italy
| | - Mara Biasin
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
| | - Irma Saulle
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, 20122 Milan, Italy
| | - Fiona Limanaqi
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, 20122 Milan, Italy
| | - Ahmed Abdelsalam
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
- International Center for T1D, Paediatric Clinical Research Center Romeo ed Enrica Invernizzi, Università degli Studi di Milano, 20157 Milan, Italy
| | - Cristian Loretelli
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
- International Center for T1D, Paediatric Clinical Research Center Romeo ed Enrica Invernizzi, Università degli Studi di Milano, 20157 Milan, Italy
| | - Laura Paradiso
- Department of Paediatrics, Ospedale dei Bambini V. Buzzi, 20154 Milan, Italy
| | - Emma Longoni
- Department of Paediatrics, Ospedale dei Bambini V. Buzzi, 20154 Milan, Italy
| | - Lucia Barcellini
- Department of Paediatrics, Ospedale dei Bambini V. Buzzi, 20154 Milan, Italy
| | - Lorenzo Piemonti
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | - Ilaria Marzinotto
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | - Stefania Dispinseri
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | - Antonella Amendola
- Department of Health Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Clara Fappani
- Department of Health Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Elisabetta Tanzi
- Department of Health Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Mario Salvatore Clerici
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, 20122 Milan, Italy
- IRCCS Fondazione Don Carlo Gnocchi, 20148 Milan, Italy
| | - Gabriella Scarlatti
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | | | - Vania Giacomet
- Paediatric Infectious Disease Unit, Ospedale L. Sacco, 20157 Milan, Italy
| | - Daria Trabattoni
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20157 Milan, Italy
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2
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Fovet CM, Pimienta C, Galhaut M, Relouzat F, Nunez N, Cavarelli M, Sconosciuti Q, Dhooge N, Marzinotto I, Lampasona V, Tolazzi M, Scarlatti G, Ho Tsong Fang R, Naninck T, Dereuddre-Bosquet N, Van Wassenhove J, Gallouët AS, Maisonnasse P, Le Grand R, Menu E, Seddiki N. A Case Study to Dissect Immunity to SARS-CoV-2 in a Neonate Nonhuman Primate Model. Front Immunol 2022; 13:855230. [PMID: 35603150 PMCID: PMC9114777 DOI: 10.3389/fimmu.2022.855230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/05/2022] [Indexed: 11/13/2022] Open
Abstract
Most children are less severely affected by coronavirus-induced disease 2019 (COVID-19) than adults, and thus more difficult to study progressively. Here, we provide a neonatal nonhuman primate (NHP) deep analysis of early immune responses to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in blood and mucosal tissues. In addition, we provide a comparison with SARS-CoV-2-infected adult NHP. Infection of the neonate resulted in a mild disease compared with adult NHPs that develop, in most cases, moderate lung lesions. In concomitance with the viral RNA load increase, we observed the development of an early innate response in the blood, as demonstrated by RNA sequencing, flow cytometry, and cytokine longitudinal data analyses. This response included the presence of an antiviral type-I IFN gene signature, a persistent and lasting NKT cell population, a balanced peripheral and mucosal IFN-γ/IL-10 cytokine response, and an increase in B cells that was accompanied with anti-SARS-CoV-2 antibody response. Viral kinetics and immune responses coincided with changes in the microbiota profile composition in the pharyngeal and rectal mucosae. In the mother, viral RNA loads were close to the quantification limit, despite the very close contact with SARS-CoV-2-exposed neonate. This pilot study demonstrates that neonatal NHPs are a relevant model for pediatric SARS-CoV-2 infection, permitting insights into the early steps of anti-SARS-CoV-2 immune responses in infants.
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Affiliation(s)
- Claire-Maëlle Fovet
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Camille Pimienta
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Mathilde Galhaut
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Francis Relouzat
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | | | - Mariangela Cavarelli
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Quentin Sconosciuti
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Nina Dhooge
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Ilaria Marzinotto
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Vito Lampasona
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Monica Tolazzi
- Viral Evolution and Transmission Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Gabriella Scarlatti
- Viral Evolution and Transmission Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Raphaël Ho Tsong Fang
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Thibaut Naninck
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Nathalie Dereuddre-Bosquet
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Jérôme Van Wassenhove
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Anne-Sophie Gallouët
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Pauline Maisonnasse
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Roger Le Grand
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Elisabeth Menu
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France.,MISTIC Group, Department of Virology, Institut Pasteur, Paris, France
| | - Nabila Seddiki
- Université Paris-Saclay, INSERM, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
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Dispinseri S, Marzinotto I, Brigatti C, Pirillo MF, Tolazzi M, Bazzigaluppi E, Canitano A, Borghi M, Gallinaro A, Caccia R, Vercesi R, McKay PF, Ciceri F, Piemonti L, Negri D, Cinque P, Cara A, Scarlatti G, Lampasona V. Seasonal Betacoronavirus Antibodies' Expansion Post-BNT161b2 Vaccination Associates with Reduced SARS-CoV-2 VoC Neutralization. J Clin Immunol 2022; 42:448-458. [PMID: 35000058 PMCID: PMC8742681 DOI: 10.1007/s10875-021-01190-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 11/28/2021] [Indexed: 01/21/2023]
Abstract
SARS-CoV-2 vaccination is known to induce antibodies that recognize also variants of concerns (VoCs) of the virus. However, epidemiological and laboratory evidences indicate that these antibodies have a reduced neutralization ability against VoCs. We studied binding and neutralizing antibodies against the Spike protein domains and subunits of the Wuhan-Hu-1 virus and its alpha, beta, delta VoCs and of seasonal betacoronaviruses (HKU1 and OC43) in a cohort of 31 health care workers prospectively followed post-vaccination with BNT162b2-Comirnaty. The study of sequential samples collected up to 64 days post-vaccination showed that serological assays measuring IgG against Wuhan-Hu-1 antigens were a poor proxy for VoC neutralization. In addition, in subjects who had asymptomatic or mild COVID-19 prior to vaccination, the loss of nAbs following disease could be rapid and accompanied by post-vaccination antibody levels similar to those of naïve vaccinees. Interestingly, in health care workers naïve for SARS-CoV-2 infection, vaccination induced a rapid and transient reactivation of pre-existing seasonal coronaviruses IgG responses that was associated with a subsequent reduced ability to neutralize alpha and beta VoCs.
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Affiliation(s)
- Stefania Dispinseri
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Ilaria Marzinotto
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Cristina Brigatti
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Maria Franca Pirillo
- National Center for Global Health, Istituto Superiore Di Sanità, 00161, Rome, Italy
| | - Monica Tolazzi
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Elena Bazzigaluppi
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Andrea Canitano
- National Center for Global Health, Istituto Superiore Di Sanità, 00161, Rome, Italy
| | - Martina Borghi
- Department of Infectious Diseases, Istituto Superiore Di Sanità, 00161, Rome, Italy
| | - Alessandra Gallinaro
- National Center for Global Health, Istituto Superiore Di Sanità, 00161, Rome, Italy
| | - Roberta Caccia
- Unit of Infectious Diseases, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Riccardo Vercesi
- Unit of Infectious Diseases, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Paul F McKay
- Department of Infectious Disease, Imperial College, London, UK
| | - Fabio Ciceri
- School of Medicine and Surgery, Università Vita-Salute San Raffaele, 20132, Milan, Italy
- Hematology and Bone Marrow Transplantation Unit, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Lorenzo Piemonti
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
- School of Medicine and Surgery, Università Vita-Salute San Raffaele, 20132, Milan, Italy
| | - Donatella Negri
- Department of Infectious Diseases, Istituto Superiore Di Sanità, 00161, Rome, Italy
| | - Paola Cinque
- Unit of Infectious Diseases, IRCCS Ospedale San Raffaele, 20132, Milan, Italy
| | - Andrea Cara
- National Center for Global Health, Istituto Superiore Di Sanità, 00161, Rome, Italy
| | - Gabriella Scarlatti
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, 20132, Milan, Italy.
| | - Vito Lampasona
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, 20132, Milan, Italy.
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4
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Miner MD, Corey L, Montefiori D. Broadly neutralizing monoclonal antibodies for HIV prevention. J Int AIDS Soc 2021; 24 Suppl 7:e25829. [PMID: 34806308 PMCID: PMC8606861 DOI: 10.1002/jia2.25829] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/14/2021] [Indexed: 12/31/2022] Open
Abstract
INTRODUCTION The last 12 years have seen remarkable progress in the isolation and characterization of at least five different epitope classes of HIV-specific broadly neutralizing antibodies (bnAbs). Detailed analyses of these bnAb lineages, maturation pathways and epitopes have created new opportunities for vaccine development. In addition, interest exists in passive administration of monoclonal antibodies as a viable option for HIV prevention. DISCUSSION Recently, two antibody-mediated prevention (AMP) trials of a passively administered monoclonal antibody targeting the HIV envelope CD4 binding site, called VRC01, provided proof-of-concept that monoclonal antibody infusion could offer protection against HIV acquisition. While the trials failed to show overall protection against HIV acquisition, sub-analyses revealed that VRC01 infusion provided a 75% prevention efficacy against HIV strains that were susceptible to the antibody. The study also demonstrated that in vitro neutralizing activity, measured by the TZM-bl/pseudovirus assay, was able to predict HIV prevention efficacy in humans. In addition, the AMP trials defined a threshold protective concentration, or neutralization titer, for the VRC01 class of bnAbs, explaining the observed low overall efficacy and serving as a benchmark for the clinical testing of new bnAbs, bnAb cocktails and neutralizing antibody-inducing vaccines. Newer bnAbs that exhibit greater potency and breadth of neutralization in vitro than VRC01 are available for clinical testing. Combinations of best-in-class bnAbs with complementary magnitude, breadth and extent of complete neutralization are predicted to far exceed the prevention efficacy of VRC01. Some engineered bi- and trispecific mAbs exhibit similar desirable neutralizing activity and afford advantages for manufacturing and delivery. Modifications that prolong the serum half-life and improve genital tissue persistence offer additional advantages. CONCLUSIONS Iterative phase 1 trials are acquiring safety and pharmacokinetic data on dual and triple bnAbs and bi- and trispecific antibodies in preparation for future AMP studies that seek to translate findings from the VRC01 efficacy trials and achieve acceptable levels of overall prevention efficacy.
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Affiliation(s)
- Maurine D. Miner
- Vaccine and Infectious Disease DivisionFred Hutchinson Cancer Research CenterSeattleWashingtonUSA
| | - Lawrence Corey
- Vaccine and Infectious Disease DivisionFred Hutchinson Cancer Research CenterSeattleWashingtonUSA
| | - David Montefiori
- Department of Surgery and Duke Human Vaccine InstituteDuke University Medical CenterDurhamNorth CarolinaUSA
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Sobia P, Archary D. Preventive HIV Vaccines-Leveraging on Lessons from the Past to Pave the Way Forward. Vaccines (Basel) 2021; 9:vaccines9091001. [PMID: 34579238 PMCID: PMC8472969 DOI: 10.3390/vaccines9091001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 09/01/2021] [Accepted: 09/03/2021] [Indexed: 12/05/2022] Open
Abstract
Almost four decades on, since the 1980’s, with hundreds of HIV vaccine candidates tested in both non-human primates and humans, and several HIV vaccines trials later, an efficacious HIV vaccine continues to evade us. The enormous worldwide genetic diversity of HIV, combined with HIV’s inherent recombination and high mutation rates, has hampered the development of an effective vaccine. Despite the advent of antiretrovirals as pre-exposure prophylaxis and preventative treatment, which have shown to be effective, HIV infections continue to proliferate, highlighting the great need for a vaccine. Here, we provide a brief history for the HIV vaccine field, with the most recent disappointments and advancements. We also provide an update on current passive immunity trials, testing proof of the concept of the most clinically advanced broadly neutralizing monoclonal antibodies for HIV prevention. Finally, we include mucosal immunity, the importance of vaccine-elicited immune responses and the challenges thereof in the most vulnerable environment–the female genital tract and the rectal surfaces of the gastrointestinal tract for heterosexual and men who have sex with men transmissions, respectively.
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Affiliation(s)
- Parveen Sobia
- Centre for the AIDS Programme of Research in South Africa (CAPRISA), Nelson Mandela School of Medicine, University of KwaZulu-Natal, Durban 4001, South Africa;
| | - Derseree Archary
- Centre for the AIDS Programme of Research in South Africa (CAPRISA), Nelson Mandela School of Medicine, University of KwaZulu-Natal, Durban 4001, South Africa;
- Department of Medical Microbiology, University of KwaZulu-Natal, Durban 4001, South Africa
- Correspondence: ; Tel.: +27-(0)-31-655-0540
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6
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Dispinseri S, Secchi M, Pirillo MF, Tolazzi M, Borghi M, Brigatti C, De Angelis ML, Baratella M, Bazzigaluppi E, Venturi G, Sironi F, Canitano A, Marzinotto I, Tresoldi C, Ciceri F, Piemonti L, Negri D, Cara A, Lampasona V, Scarlatti G. Neutralizing antibody responses to SARS-CoV-2 in symptomatic COVID-19 is persistent and critical for survival. Nat Commun 2021; 12:2670. [PMID: 33976165 PMCID: PMC8113594 DOI: 10.1038/s41467-021-22958-8] [Citation(s) in RCA: 257] [Impact Index Per Article: 85.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 04/11/2021] [Indexed: 12/11/2022] Open
Abstract
Understanding how antibody responses to SARS-CoV-2 evolve during infection may provide important insight into therapeutic approaches and vaccination for COVID-19. Here we profile the antibody responses of 162 COVID-19 symptomatic patients in the COVID-BioB cohort followed longitudinally for up to eight months from symptom onset to find SARS-CoV-2 neutralization, as well as antibodies either recognizing SARS-CoV-2 spike antigens and nucleoprotein, or specific for S2 antigen of seasonal beta-coronaviruses and hemagglutinin of the H1N1 flu virus. The presence of neutralizing antibodies within the first weeks from symptoms onset correlates with time to a negative swab result (p = 0.002), while the lack of neutralizing capacity correlates with an increased risk of a fatal outcome (p = 0.008). Neutralizing antibody titers progressively drop after 5-8 weeks but are still detectable up to 8 months in the majority of recovered patients regardless of age or co-morbidities, with IgG to spike antigens providing the best correlate of neutralization. Antibody responses to seasonal coronaviruses are temporarily boosted, and parallel those to SARS-CoV-2 without dampening the specific response or worsening disease progression. Our results thus suggest compromised immune responses to the SARS-CoV-2 spike to be a major trait of COVID-19 patients with critical conditions, and thereby inform on the planning of COVID-19 patient care and therapy prioritization.
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Affiliation(s)
- Stefania Dispinseri
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Massimiliano Secchi
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
- DNA Enzymology & Molecular Virology Unit, Institute of Molecular Genetics, National Research Council, Pavia, Italy
| | | | - Monica Tolazzi
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Martina Borghi
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Cristina Brigatti
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Maria Laura De Angelis
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Marco Baratella
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, Milan, Italy
| | | | - Giulietta Venturi
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Francesca Sironi
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Andrea Canitano
- National Center for Global Health, Istituto Superiore di Sanità, Rome, Italy
| | - Ilaria Marzinotto
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Cristina Tresoldi
- Molecular Hematology Unit, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Fabio Ciceri
- Hematology and Bone Marrow Transplantation Unit, IRCCS Ospedale San Raffaele, Milan, Italy
- School of Medicine and Surgery, Università Vita-Salute San Raffaele, Milan, Italy
| | - Lorenzo Piemonti
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
- School of Medicine and Surgery, Università Vita-Salute San Raffaele, Milan, Italy
| | - Donatella Negri
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Andrea Cara
- National Center for Global Health, Istituto Superiore di Sanità, Rome, Italy
| | - Vito Lampasona
- Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Gabriella Scarlatti
- Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, Milan, Italy.
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7
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Dispinseri S, Cavarelli M, Tolazzi M, Plebani AM, Jansson M, Scarlatti G. Continuous HIV-1 Escape from Autologous Neutralization and Development of Cross-Reactive Antibody Responses Characterizes Slow Disease Progression of Children. Vaccines (Basel) 2021; 9:vaccines9030260. [PMID: 33799407 PMCID: PMC7999787 DOI: 10.3390/vaccines9030260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 11/16/2022] Open
Abstract
The antibodies with different effector functions evoked by Human Immunodeficiency Virus type 1 (HIV-1) transmitted from mother to child, and their role in the pathogenesis of infected children remain unresolved. So, too, the kinetics and breadth of these responses remain to be clearly defined, compared to those developing in adults. Here, we studied the kinetics of the autologous and heterologous neutralizing antibody (Nab) responses, in addition to antibody-dependent cellular cytotoxicity (ADCC), in HIV-1 infected children with different disease progression rates followed from close after birth and five years on. Autologous and heterologous neutralization were determined by Peripheral blood mononuclear cells (PBMC)- and TZMbl-based assays, and ADCC was assessed with the GranToxiLux assay. The reactivity to an immunodominant HIV-1 gp41 epitope, and childhood vaccine antigens, was assessed by ELISA. Newborns displayed antibodies directed towards the HIV-1 gp41 epitope. However, antibodies neutralizing the transmitted virus were undetectable. Nabs directed against the transmitted virus developed usually within 12 months of age in children with slow progression, but rarely in rapid progressors. Thereafter, autologous Nabs persisted throughout the follow-up of the slow progressors and induced a continuous emergence of escape variants. Heterologous cross-Nabs were detected within two years, but their subsequent increase in potency and breadth was mainly a trait of slow progressors. Analogously, titers of antibodies mediating ADCC to gp120 BaL pulsed target cells increased in slow progressors during follow-up. The kinetics of antibody responses to the immunodominant viral antigen and the vaccine antigens were sustained and independent of disease progression. Persistent autologous Nabs triggering viral escape and an increase in the breadth and potency of cross-Nabs are exclusive to HIV-1 infected slowly progressing children.
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Affiliation(s)
- Stefania Dispinseri
- Viral Evolution and Transmission Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy; (S.D.); (M.T.)
| | - Mariangela Cavarelli
- Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), University Paris-Saclay, 92265 Fontenay-aux-Roses & Le Kremlin-Bicêtre, France;
| | - Monica Tolazzi
- Viral Evolution and Transmission Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy; (S.D.); (M.T.)
| | - Anna Maria Plebani
- Pediatric Emergency Unit, Filippo Del Ponte Hospital, ASST-Settelaghi, 21100 Varese, Italy;
| | - Marianne Jansson
- Department of Laboratory Medicine, Lund University, 22242 Lund, Sweden;
| | - Gabriella Scarlatti
- Viral Evolution and Transmission Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy; (S.D.); (M.T.)
- Correspondence: ; Tel.: +39-022643-4906; Fax: +39-022643-4905
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8
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Suphaphiphat K, Bernard-Stoecklin S, Gommet C, Delache B, Dereuddre-Bosquet N, Kent SJ, Wines BD, Hogarth PM, Le Grand R, Cavarelli M. Innate and Adaptive Anti-SIV Responses in Macaque Semen: Implications for Infectivity and Risk of Transmission. Front Immunol 2020; 11:850. [PMID: 32528466 PMCID: PMC7247827 DOI: 10.3389/fimmu.2020.00850] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 04/14/2020] [Indexed: 12/16/2022] Open
Abstract
HIV-1 infection is transmitted primarily by sexual exposure, with semen being the principal contaminated fluid. However, HIV-specific immune response in semen has been understudied. We investigated specific parameters of the innate, cellular, and humoral immune response that may affect semen infectivity in macaques infected with SIVmac251. Serial semen levels of cytokines and chemokines, SIV-specific antibodies, neutralization, and FcγR-mediated functions and SIV-specific T-cell responses were assessed and compared to systemic responses across 53 cynomolgus macaques. SIV infection induced an overall inflammatory state in the semen. Several pro-inflammatory molecules correlated with SIV virus levels. Effector CD8+ T cells were expanded in semen upon infection. SIV-specific CD8+ T-cells that expressed multiple effector molecules (IFN-γ+MIP-1β+TNF+/-) were induced in the semen of a subset of SIV-infected macaques, but this did not correlate with local viral control. SIV-specific IgG, commonly capable of engaging the FcγRIIIa receptor, was detected in most semen samples although this positively correlated with seminal viral load. Several inflammatory immune responses in semen develop in the context of higher levels of SIV seminal plasma viremia. These inflammatory immune responses could play a role in viral transmission and should be considered in the development of preventive and prophylactic vaccines.
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Affiliation(s)
- Karunasinee Suphaphiphat
- CEA-Université Paris Sud-INSERM U1184, “Immunology of Viral Infections and Auto-Immune Diseases”, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Sibylle Bernard-Stoecklin
- CEA-Université Paris Sud-INSERM U1184, “Immunology of Viral Infections and Auto-Immune Diseases”, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Céline Gommet
- CEA-Université Paris Sud-INSERM U1184, “Immunology of Viral Infections and Auto-Immune Diseases”, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Benoit Delache
- CEA-Université Paris Sud-INSERM U1184, “Immunology of Viral Infections and Auto-Immune Diseases”, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Nathalie Dereuddre-Bosquet
- CEA-Université Paris Sud-INSERM U1184, “Immunology of Viral Infections and Auto-Immune Diseases”, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Stephen J. Kent
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
- Melbourne Sexual Health Centre and Department of Infectious Diseases, Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC, Australia
- ARC Centre for Excellence in Convergent Bio-Nano Science and Technology, University of Melbourne, Parkville, VIC, Australia
| | - Bruce D. Wines
- Immune Therapies Group, Burnet Institute, Melbourne, VIC, Australia
- Department of Clinical Pathology, University of Melbourne, Melbourne, VIC, Australia
- Department of Immunology and Pathology, Monash University, Melbourne, VIC, Australia
| | - P. Mark Hogarth
- Immune Therapies Group, Burnet Institute, Melbourne, VIC, Australia
- Department of Clinical Pathology, University of Melbourne, Melbourne, VIC, Australia
- Department of Immunology and Pathology, Monash University, Melbourne, VIC, Australia
| | - Roger Le Grand
- CEA-Université Paris Sud-INSERM U1184, “Immunology of Viral Infections and Auto-Immune Diseases”, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
| | - Mariangela Cavarelli
- CEA-Université Paris Sud-INSERM U1184, “Immunology of Viral Infections and Auto-Immune Diseases”, IDMIT Department, IBFJ, Fontenay-aux-Roses, France
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9
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Mishra NN, Agarwal A, Moitra T, Polachira SK, Nair R, Gupta SK. Anti-HIV-1 activity and safety profile of a polyherbal gel formulation as a candidate microbicide. J Herb Med 2019. [DOI: 10.1016/j.hermed.2019.100284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Cohen YZ, Butler AL, Millard K, Witmer-Pack M, Levin R, Unson-O’Brien C, Patel R, Shimeliovich I, Lorenzi JCC, Horowitz J, Walsh SR, Lin S, Weiner JA, Tse A, Sato A, Bennett C, Mayer B, Seaton KE, Yates NL, Baden LR, deCamp AC, Ackerman ME, Seaman MS, Tomaras GD, Nussenzweig MC, Caskey M. Safety, pharmacokinetics, and immunogenicity of the combination of the broadly neutralizing anti-HIV-1 antibodies 3BNC117 and 10-1074 in healthy adults: A randomized, phase 1 study. PLoS One 2019; 14:e0219142. [PMID: 31393868 PMCID: PMC6687118 DOI: 10.1371/journal.pone.0219142] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 05/16/2019] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Additional forms of pre-exposure prophylaxis are needed to prevent HIV-1 infection. 3BNC117 and 10-1074 are broadly neutralizing anti-HIV-1 antibodies that target non-overlapping epitopes on the HIV-1 envelope. We investigated the safety, tolerability, pharmacokinetics, and immunogenicity of the intravenous administration of the combination of 3BNC117 and 10-1074 in healthy adults. METHODS This randomized, double-blind, placebo-controlled, single center, phase 1 study enrolled healthy adults aged 18-65 years to receive one infusion of 3BNC117 immediately followed by 10-1074 at 10 mg/kg, three infusions of 3BNC117 followed by 10-1074 at 3 mg/kg or 10 mg/kg every 8 weeks, or placebo infusions. The primary outcomes were safety and pharmacokinetics. This trial is registered with ClinicalTrials.gov, number NCT02824536. FINDINGS Twenty-four participants were enrolled in a 3:1 ratio to receive the study products or placebo. The combination of 3BNC117 and 10-1074 was safe and generally well tolerated. There were no serious adverse events considered related to the infusions. The mean elimination half-lives of 3BNC117 and 10-1074 were 16.4 ± 4.6 days and 23.0 ± 5.4 days, respectively, similar to what was observed in previous studies in which each antibody was administered alone. Anti-drug antibody responses were rare and without evidence of related adverse events or impact on elimination kinetics. INTERPRETATION Single and repeated doses of the combination of 3BNC117 and 10-1074 were well tolerated in healthy adults. These data support the further development of the combination of 3BNC117 and 10-1074 as a long-acting injectable form of pre-exposure prophylaxis for the prevention of HIV-1 infection.
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MESH Headings
- Administration, Intravenous/methods
- Adult
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/pharmacokinetics
- Antibodies, Monoclonal, Humanized/pharmacology
- Broadly Neutralizing Antibodies/immunology
- Broadly Neutralizing Antibodies/pharmacology
- Double-Blind Method
- Drug Therapy, Combination/methods
- Female
- HIV Antibodies/immunology
- HIV Antibodies/pharmacology
- HIV Infections/immunology
- HIV Infections/prevention & control
- HIV Seropositivity/drug therapy
- HIV-1/immunology
- HIV-1/pathogenicity
- Healthy Volunteers
- Humans
- Male
- Placebo Effect
- Pre-Exposure Prophylaxis/methods
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Affiliation(s)
- Yehuda Z. Cohen
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Allison L. Butler
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Katrina Millard
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Maggi Witmer-Pack
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Rebeka Levin
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Cecilia Unson-O’Brien
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Roshni Patel
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Irina Shimeliovich
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Julio C. C. Lorenzi
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Jill Horowitz
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
| | - Stephen R. Walsh
- Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
| | - Shu Lin
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Joshua A. Weiner
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Anna Tse
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Alicia Sato
- Vaccine and Infectious Disease Division and Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Chelsey Bennett
- Vaccine and Infectious Disease Division and Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Bryan Mayer
- Vaccine and Infectious Disease Division and Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Kelly E. Seaton
- Duke Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Nicole L. Yates
- Duke Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Lindsey R. Baden
- Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
| | - Allan C. deCamp
- Vaccine and Infectious Disease Division and Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Margaret E. Ackerman
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Michael S. Seaman
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Georgia D. Tomaras
- Duke Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States of America
- Departments of Surgery, Immunology, Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Michel C. Nussenzweig
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
- Howard Hughes Medical Institute, Chevy Chase, Maryland, United States of America
| | - Marina Caskey
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, United States of America
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11
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Zou X, Yuan M, Zhang T, Wei H, Xu S, Jiang N, Zheng N, Wu Z. Extracellular vesicles expressing a single-chain variable fragment of an HIV-1 specific antibody selectively target Env + tissues. Theranostics 2019; 9:5657-5671. [PMID: 31534509 PMCID: PMC6735399 DOI: 10.7150/thno.33925] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 07/09/2019] [Indexed: 12/26/2022] Open
Abstract
Rationale: Antiretroviral therapy can effectively suppress HIV-1 replication in the peripheral blood to an undetectable level. However, elimination of the latent virus in reservoirs remains a challenge and is a major obstacle in the treatment of HIV-1-infected patients. Exosomes exhibit huge promise as an endogenous drug delivery nanosystem for delivering drugs to solid tissues given their unique properties, including low immunogenicity, innate stability, high delivery efficiency, and most importantly the ability to penetrate solid tissues due to their lipophilic properties. Methods: We engineered and expressed the scFv of a high affinity HIV-1-specific monoclonal antibody, 10E8, on the exosomal surface (10E8scFv-exos). Subsequently, the 10E8scFv-exos were loaded with curcumin (Cur), a chemical that kills HIV-1-infected cells, or miR-143, an apoptosis-inducing miRNA. We tested the ability of 10E8scFv-exos to deliver cargo to Env+ target cells and tissues, as well as their ability to suppress HIV-1 infection. Results: 10E8scFv-exos efficiently targeted CHO cells expressing a trimeric gp140 on their surface (Env+ cells) in vitro, as demonstrated by confocal imaging and flow cytometry. 10E8scFv-exos loaded with Cur or miR-143 showed specific killing of Env+ cells. In addition, 10E8scFv-exos loaded with Cur or miR-143 could suppress p24 expression in an HIV-1 latency cell line ACH2 and in PBMCs from an ART-treated HIV-1-infected patient. In an NCG mouse model grafted with tumorigenic Env+ CHO cells and which had developed solid tissue tumors, intravenously injected 10E8scFv-exos targeted the Env-expressing tissues and delivered Cur to induce a strong suppression of the Env+ tumor growth with low toxicity. Conclusion: In principle, engineered exosomes can deliver anti-HIV agents to solid tissues by specifically targeting cells expressing viral envelop proteins and inducing cell killing, suggesting that such an approach could be developed for eradicating virus-infected cells in tissue reservoirs.
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Affiliation(s)
- Xue Zou
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Meng Yuan
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Tongyu Zhang
- Model Animal Research Center, Nanjing University, China
| | - Hongxia Wei
- Department of infectious disease, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine
| | - Shijie Xu
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Na Jiang
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Nan Zheng
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
- State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, China
- Medical School, Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
| | - Zhiwei Wu
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
- State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, China
- Medical School, Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
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12
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Cheeseman HM, Day S, McFarlane LR, Fleck S, Miller A, Cole T, Sousa-Santos N, Cope A, Cizmeci D, Tolazzi M, Hwekwete E, Hannaman D, Kratochvil S, McKay PF, Chung AW, Kent SJ, Cook A, Scarlatti G, Abraham S, Combadiere B, McCormack S, Lewis DJ, Shattock RJ. Combined Skin and Muscle DNA Priming Provides Enhanced Humoral Responses to a Human Immunodeficency Virus Type 1 Clade C Envelope Vaccine. Hum Gene Ther 2019; 29:1011-1028. [PMID: 30027768 PMCID: PMC6214652 DOI: 10.1089/hum.2018.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Intradermal (i.d.) and intramuscular (i.m.) injections when administered with or without electroporation (EP) have the potential to tailor the immune response to DNA vaccination. This Phase I randomized controlled clinical trial in human immunodeficiency virus type 1–negative volunteers investigated whether the site and mode of DNA vaccination influences the quality of induced cellular and humoral immune responses following the DNA priming phase and subsequent protein boost with recombinant clade C CN54 gp140. A strategy of concurrent i.d. and i.m. DNA immunizations administered with or without EP was adopted. Subtle differences were observed in the shaping of vaccine-induced virus-specific CD4+ and CD8+ T cell–mediated immune responses between groups receiving: i.d.EP + i.m., i.d. + i.m.EP, and i.d.EP + i.m.EP regimens. The DNA priming phase induced 100% seroconversion in all of the groups. A single, non-adjuvanted protein boost induced a rapid and profound increase in binding antibodies in all groups, with a trend for higher responses in i.d.EP + i.m.EP. The magnitude of antigen-specific binding immunoglobulin G correlated with neutralization of closely matched clade C 93MW965 virus and Fc-dimer receptor binding (FcγRIIa and FcγRIIIa). These results offer new perspectives on the use of combined skin and muscle DNA immunization in priming humoral and cellular responses to recombinant protein.
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Affiliation(s)
- Hannah Mary Cheeseman
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Suzanne Day
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Leon Robert McFarlane
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Sue Fleck
- 2 Medical Research Council Clinical Trials Unit at UCL, University College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Aleisha Miller
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Tom Cole
- 3 Imperial Clinical Research Facility, Hammersmith Hospital, Imperial College Healthcare NHS Trust, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Nelson Sousa-Santos
- 3 Imperial Clinical Research Facility, Hammersmith Hospital, Imperial College Healthcare NHS Trust, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Alethea Cope
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Deniz Cizmeci
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Monica Tolazzi
- 4 Viral Evolution and Transmission Unit, Division of Immunology, Transplant and Infectious Diseases, San Raffaele Scientific Institute, Milan, Italy; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Edith Hwekwete
- 3 Imperial Clinical Research Facility, Hammersmith Hospital, Imperial College Healthcare NHS Trust, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Drew Hannaman
- 5 Ichor Medical Systems, Inc., San Diego, California; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Sven Kratochvil
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Paul Francis McKay
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Amy W Chung
- 6 Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, and UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Stephen J Kent
- 6 Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, and UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France .,7 ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Melbourne, Melbourne, Australia; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France .,8 Melbourne Sexual Health Centre, Department of Infectious Diseases, Alfred Health, Central Clinical School, Monash University , Melbourne, Australia; and UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Adrian Cook
- 2 Medical Research Council Clinical Trials Unit at UCL, University College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Gabriella Scarlatti
- 4 Viral Evolution and Transmission Unit, Division of Immunology, Transplant and Infectious Diseases, San Raffaele Scientific Institute, Milan, Italy; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Sonya Abraham
- 3 Imperial Clinical Research Facility, Hammersmith Hospital, Imperial College Healthcare NHS Trust, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Behazine Combadiere
- 9 Sorbonne Universités, UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Sheena McCormack
- 2 Medical Research Council Clinical Trials Unit at UCL, University College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - David John Lewis
- 3 Imperial Clinical Research Facility, Hammersmith Hospital, Imperial College Healthcare NHS Trust, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Robin John Shattock
- 1 Department of Medicine, Section of Virology, Group of Mucosal Infection and Immunity, Imperial College London, London, United Kingdom; UPMC Univ Paris 06, INSERM, U1135, CNRS, ERL 8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
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13
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Zhang Y, Wang C, Gao N, Zhang X, Yu X, Xu J, Gao F. Determination of neutralization activities by a new versatile assay using an HIV-1 genome carrying the Gaussia luciferase gene. J Virol Methods 2019; 267:22-28. [PMID: 30817948 DOI: 10.1016/j.jviromet.2019.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/25/2019] [Accepted: 02/25/2019] [Indexed: 11/26/2022]
Abstract
Characterization of neutralizing activities are critical to evaluation of the neutralization potency and breadth of monoclonal antibodies or anti-HIV-1 sera elicited during natural HIV-1 infection or by vaccines. We have developed a new neutralization method using the SG3Δenv genome carrying the Gaussia luciferase gene between the env and nef genes. Pseudotype viruses generated using this new SG3Δenv-GLuc backbone together with HIV-1 env genes were infectious to TZM-bl cells, T cell lines and primary T cells. Viral infection can be detected by measuring luciferase activities with both lysed cells and culture supernatants. Neutralization titers in sera from HIV-1-infected individuals against tier 1 and tier 2 viruses were comparable to those determined by the gold standard TZM-bl-firefly method. Since the neutralization activities can be determined by repeatedly measuring luciferase activities in culture supernatants of any cells that are infected by SG3Δenv-GLuc-Env pseudotype viruses, this new method can serve as a versatile and high throughput assay to determine neutralization activities.
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Affiliation(s)
- Yuepeng Zhang
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, 130012, China
| | - Chu Wang
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, 130012, China
| | - Nan Gao
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, 130012, China
| | - Xiaoyan Zhang
- Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, China
| | - Xianghui Yu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, 130012, China; Key Laboratory for Molecular Enzymology and Engineering, the Ministry of Education, School of Life Sciences, Jilin University, Changchun, Jilin, 130012, China
| | - Jianqing Xu
- Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, China
| | - Feng Gao
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, 130012, China; Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
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14
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Herbal Gel Formulation Developed for Anti-Human Immunodeficiency Virus (HIV)-1 Activity Also Inhibits In Vitro HSV-2 Infection. Viruses 2018; 10:v10110580. [PMID: 30352961 PMCID: PMC6266149 DOI: 10.3390/v10110580] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 10/09/2018] [Accepted: 10/12/2018] [Indexed: 11/25/2022] Open
Abstract
Herpes simplex virus-2 (HSV-2) infection is the most common cause of genital ulcers. The impact of ulcers also demonstrates a strong link to the human immunodeficiency virus (HIV) infection. Complications, drug resistance, and side-effects of anti-viral drugs make the treatment of HSV-2 infection challenging. Herbal medicines have shown potential against HSV-2 and HIV infections. In this context, polyherbal gel formulation comprising 50% ethanolic extracts from Acacia catechu, Lagerstroemia speciosa, Terminalia chebula and Phyllanthus emblica has been developed. The gel formulation significantly exhibited virucidal activity against both HIV-1 and HSV-2 infections with IC50, 55.93 ± 5.30 µg/mL and 27.26 ± 4.87 µg/mL, respectively. It also inhibited HSV-2 attachment and penetration to the Vero cells with an IC50 = 46.55 ± 1.25 µg/mL and 54.94 ± 2.52 µg/mL respectively, which were significantly lower than acyclovir. However, acyclovir is more potent in post-infection assay with an IC50 = 0.065 ± 0.01 µg/mL whereas gel formulation showed an IC50 = 469.05 ± 16.65 µg/mL under similar conditions. Gel formulation showed no inhibitory effect on the viability of lactobacilli, human vaginal keratinocyte cells (Vk2/E6E7), and the integrity of the Caco-2 cells monolayer. Gel formulation did not lead to any significant increase in the secretion of pro-inflammatory cytokines and mutagenic index. The proposed gel formulation may be a promising candidate microbicide for the prevention of sexually transmitted HIV-1 and HSV-2.
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HIV transmission from infected CD4+ T cells to allogenic T and dendritic cells is inhibited by broadly neutralizing antibodies. AIDS 2018; 32:1239-1245. [PMID: 29683853 DOI: 10.1097/qad.0000000000001834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE In the semen, both free virus and infected cells are able to establish HIV infection during sexual intercourse. An efficient vaccine should therefore inhibit both infectious states. The aim of this study was to analyze the capacity of broadly neutralizing antibodies (bNAbs) to inhibit HIV transmission by the infected cells. DESIGN/METHODS We developed an in-vitro model aiming to mimic mucosal HIV transmission via infected cells. PHA-activated CD4+ T cells stained with PKH26 from donor A were infected and co-cultured with CD4+ T cells and dendritic cells from donor B in the presence of bNAbs. RESULTS We showed that dendritic cells were the preferential HIV target cells at early time points in this co-culture model. In the context of this co-culture model where infection and transmission occurred simultaneously, bNAbs efficiently inhibited HIV replication as well as HIV transmission from infected cells to allogenic dendritic cells and CD4+ T cells. CONCLUSION Overall, our results indicate that dendritic cells, in addition to CD4+ T cells, are key cells that are efficiently infected by HIV and bNAbs are potent inhibitors of infection of both target cells. Future HIV prophylactic vaccine design should develop immune strategies able to prevent the infection of dendritic cells, in addition to the inhibition of CD4+ T-cell infection.
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Xie H, Nie J, Chen Q, Huang W, Wang Y. Comparison of the genotypic and phenotypic properties of HIV-1 standard subtype B and subtype B/B' env molecular clones derived from infections in China. Emerg Microbes Infect 2018; 7:90. [PMID: 29769530 PMCID: PMC5955974 DOI: 10.1038/s41426-018-0087-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 04/11/2018] [Accepted: 04/13/2018] [Indexed: 01/01/2023]
Abstract
Although a number of standardized human immunodeficiency virus 1 (HIV-1) pseudoviruses have been generated to assess neutralizing antibodies, subtype B/B′ has not been comprehensively characterized either genotypically or phenotypically. Full-length env genes were isolated from plasma samples derived from B/B′-infected individuals, including former plasma donors and men who had sex with men. The neutralization properties of these pseudoviruses were determined by testing against sCD4, 16 neutralizing monoclonal antibodies and 44 plasma samples, including samples from those infected with the three major prevalent clades in China. Twenty-eight pseudoviruses were successfully constructed, including 15 B′ and 13 B strains. Compared with subtype B strains from North America and Europe, the B′ strains from China showed greater variation in the V3 loop and higher susceptibility to the neutralizing antibody 2F5 and B/B′ plasma samples. The B′ strains from China showed significantly lower susceptibility to some trimer apex-binding neutralizing antibodies (PGT145, CH01, CH02, CH03, and CH04) than the B strains from Western countries. The 28 B-pseudotyped and B′-pseudotyped viruses were grouped into high, medium, and low clusters based on their overall neutralization sensitivity to plasma samples. The different genotypic and phenotypic properties of the standard subtype B from those of the Western viruses compared to the B and B′ strains from China suggest that clones from HIV-1-infected individuals in China are more suitable for the evaluation of candidate vaccines targeting the subtype B/B′ viruses circulating in China.
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Affiliation(s)
- Hui Xie
- Graduate School of Peking Union Medical College, No. 9 Dongdan Santiao, Dongcheng District,, 100730, Beijing, China.,Division of HIV/AIDS and Sexually Transmitted Virus Vaccines, National Institutes for Food and Drug Control (NIFDC), No. 31 Huatuo Street, Daxing District,, 102629, Beijing, China
| | - Jianhui Nie
- Division of HIV/AIDS and Sexually Transmitted Virus Vaccines, National Institutes for Food and Drug Control (NIFDC), No. 31 Huatuo Street, Daxing District,, 102629, Beijing, China
| | - Qingqing Chen
- Division of HIV/AIDS and Sexually Transmitted Virus Vaccines, National Institutes for Food and Drug Control (NIFDC), No. 31 Huatuo Street, Daxing District,, 102629, Beijing, China
| | - Weijin Huang
- Division of HIV/AIDS and Sexually Transmitted Virus Vaccines, National Institutes for Food and Drug Control (NIFDC), No. 31 Huatuo Street, Daxing District,, 102629, Beijing, China
| | - Youchun Wang
- Graduate School of Peking Union Medical College, No. 9 Dongdan Santiao, Dongcheng District,, 100730, Beijing, China. .,Division of HIV/AIDS and Sexually Transmitted Virus Vaccines, National Institutes for Food and Drug Control (NIFDC), No. 31 Huatuo Street, Daxing District,, 102629, Beijing, China.
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González N, McKee K, Lynch RM, Georgiev IS, Jimenez L, Grau E, Yuste E, Kwong PD, Mascola JR, Alcamí J. Characterization of broadly neutralizing antibody responses to HIV-1 in a cohort of long term non-progressors. PLoS One 2018; 13:e0193773. [PMID: 29558468 PMCID: PMC5860703 DOI: 10.1371/journal.pone.0193773] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 02/16/2018] [Indexed: 12/21/2022] Open
Abstract
Background Only a small fraction of HIV-1-infected patients develop broadly neutralizing antibodies (bNAbs), a process generally associated to chronic antigen stimulation. It has been described that rare aviremic HIV-1-infected patients can generate bNAbs but this issue remains controversial. To address this matter we have assessed bNAb responses in a large cohort of long-term non-progressors (LTNPs) with low or undetectable viremia. Methods Samples from the LTNP cohort of the Spanish AIDS Research Network (87 elite and 42 viremic controllers) and a control population of 176 viremic typical-progressors (TPs) were screened for bNAbs using Env-recombinant viruses. bNAb specificities were studied by ELISA using mutated gp120, neutralization assays with mutated viruses, and peptide competition. Epitope specificities were also elucidated from the serum pattern of neutralization against a panel of diverse HIV-1 isolates. Results Broadly neutralizing sera were found among 9.3% LTNPs, both elite (7%) and viremic controllers (14%). Within the broadly neutralizing sera, CD4 binding site antibodies were detected by ELISA in 4/12 LTNPs (33%), and 16/33 of TPs (48%). Anti-MPER antibodies were detected in 6/12 LTNPs (50%) and 14/33 TPs (42%) whereas glycan-dependent HIV-1 bNAbs were more frequent in LTNPs (11/12, 92%) as compared to TPs (12/33, 36%). A good concordance between standard serum mapping and neutralization-based mapping was observed. Conclusion LTNPs, both viremic and elite controllers, showed broad humoral immune responses against HIV-1, including activity against many major epitopes involved in bNAbs-mediated protection.
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Affiliation(s)
- Nuria González
- AIDS Immunopathology Unit, Instituto de Salud Carlos III, Madrid, Spain
- * E-mail: (NG); (JA)
| | - Krisha McKee
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Washington, United States of America
| | - Rebecca M. Lynch
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Washington, United States of America
| | - Ivelin S. Georgiev
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Washington, United States of America
| | - Laura Jimenez
- AIDS Immunopathology Unit, Instituto de Salud Carlos III, Madrid, Spain
| | - Eulalia Grau
- IrsiCaixa Foundation, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Barcelona, Spain
| | - Eloísa Yuste
- Retrovirology and Viral Immunopathology Laboratory, IDIBAPS, Hospital Clínic, University of Barcelona, Barcelona, Spain
| | - Peter D. Kwong
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Washington, United States of America
| | - John R. Mascola
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Washington, United States of America
| | - José Alcamí
- AIDS Immunopathology Unit, Instituto de Salud Carlos III, Madrid, Spain
- * E-mail: (NG); (JA)
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Neutralizing Activity of Broadly Neutralizing Anti-HIV-1 Antibodies against Clade B Clinical Isolates Produced in Peripheral Blood Mononuclear Cells. J Virol 2018; 92:JVI.01883-17. [PMID: 29237833 PMCID: PMC5809738 DOI: 10.1128/jvi.01883-17] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 12/03/2017] [Indexed: 11/20/2022] Open
Abstract
Recently discovered broadly neutralizing antibodies (bNAbs) against HIV-1 demonstrate extensive breadth and potency against diverse HIV-1 strains and represent a promising approach for the treatment and prevention of HIV-1 infection. The breadth and potency of these antibodies have primarily been evaluated by using panels of HIV-1 Env-pseudotyped viruses produced in 293T cells expressing molecularly cloned Env proteins. Here we report on the ability of five bNAbs currently in clinical development to neutralize circulating primary HIV-1 isolates derived from peripheral blood mononuclear cells (PBMCs) and compare the results to those obtained with the pseudovirus panels used to characterize the bNAbs. The five bNAbs demonstrated significantly less breadth and potency against clinical isolates produced in PBMCs than against Env-pseudotyped viruses. The magnitude of this difference in neutralizing activity varied, depending on the antibody epitope. Glycan-targeting antibodies showed differences of only 3- to 4-fold, while antibody 10E8, which targets the membrane-proximal external region, showed a nearly 100-fold decrease in activity between published Env-pseudotyped virus panels and PBMC-derived primary isolates. Utilizing clonal PBMC-derived primary isolates and molecular clones, we determined that the observed discrepancy in bNAb performance is due to the increased sensitivity to neutralization exhibited by 293T-produced Env-pseudotyped viruses. We also found that while full-length molecularly cloned viruses produced in 293T cells exhibit greater sensitivity to neutralization than PBMC-derived viruses do, Env-pseudotyped viruses produced in 293T cells generally exhibit even greater sensitivity to neutralization. As the clinical development of bNAbs progresses, it will be critical to determine the relevance of each of these in vitro neutralization assays to in vivo antibody performance. IMPORTANCE Novel therapeutic and preventive strategies are needed to contain the HIV-1 epidemic. Antibodies with exceptional neutralizing activity against HIV-1 may provide several advantages to traditional HIV drugs, including an improved side-effect profile, a reduced dosing frequency, and immune enhancement. The activity of these antibodies has been established in vitro by utilizing HIV-1 Env-pseudotyped viruses derived from circulating viruses but produced in 293T cells by pairing Env proteins with a backbone vector. We tested PBMC-produced circulating viruses against five anti-HIV-1 antibodies currently in clinical development. We found that the activity of these antibodies against PBMC isolates is significantly less than that against 293T Env-pseudotyped viruses. This decline varied among the antibodies tested, with some demonstrating moderate reductions in activity and others showing an almost 100-fold reduction. As the development of these antibodies progresses, it will be critical to determine how the results of different in vitro tests correspond to performance in the clinic.
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Karlsson I, Borggren M, Rosenstierne MW, Trebbien R, Williams JA, Vidal E, Vergara-Alert J, Foz DS, Darji A, Sisteré-Oró M, Segalés J, Nielsen J, Fomsgaard A. Protective effect of a polyvalent influenza DNA vaccine in pigs. Vet Immunol Immunopathol 2018; 195:25-32. [PMID: 29249314 PMCID: PMC5764121 DOI: 10.1016/j.vetimm.2017.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 11/20/2017] [Accepted: 11/22/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Influenza A virus in swine herds represents a major problem for the swine industry and poses a constant threat for the emergence of novel pandemic viruses and the development of more effective influenza vaccines for pigs is desired. By optimizing the vector backbone and using a needle-free delivery method, we have recently demonstrated a polyvalent influenza DNA vaccine that induces a broad immune response, including both humoral and cellular immunity. OBJECTIVES To investigate the protection of our polyvalent influenza DNA vaccine approach in a pig challenge study. METHODS By intradermal needle-free delivery to the skin, we immunized pigs with two different doses (500μg and 800μg) of an influenza DNA vaccine based on six genes of pandemic origin, including internally expressed matrix and nucleoprotein and externally expressed hemagglutinin and neuraminidase as previously demonstrated. Two weeks following immunization, the pigs were challenged with the 2009 pandemic H1N1 virus. RESULTS When challenged with 2009 pandemic H1N1, 0/5 vaccinated pigs (800μg DNA) became infected whereas 5/5 unvaccinated control pigs were infected. The pigs vaccinated with the low dose (500μg DNA) were only partially protected. The DNA vaccine elicited binding-, hemagglutination inhibitory (HI) - as well as cross-reactive neutralizing antibody activity and neuraminidase inhibiting antibodies in the immunized pigs, in a dose-dependent manner. CONCLUSION The present data, together with the previously demonstrated immunogenicity of our influenza DNA vaccine, indicate that naked DNA vaccine technology provides a strong approach for the development of improved pig vaccines, applying realistic low doses of DNA and a convenient delivery method for mass vaccination.
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Affiliation(s)
- Ingrid Karlsson
- Virus Research and Development Laboratory, Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark
| | - Marie Borggren
- Virus Research and Development Laboratory, Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark
| | - Maiken Worsøe Rosenstierne
- Virus Research and Development Laboratory, Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark
| | - Ramona Trebbien
- National Influenza Center Denmark, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark
| | - James A Williams
- Nature Technology Corporation, 4701 Innovation Dr, Lincoln, NE 68521, USA
| | - Enric Vidal
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Júlia Vergara-Alert
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - David Solanes Foz
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Ayub Darji
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Marta Sisteré-Oró
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Joaquim Segalés
- UAB, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain; Departament de Sanitat i Anatomia Animals, Facultat de Veterinària, UAB, 08193 Bellaterra, Barcelona, Spain
| | - Jens Nielsen
- Virus Research and Development Laboratory, Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark
| | - Anders Fomsgaard
- Virus Research and Development Laboratory, Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark; Infectious Disease Research Unit, Clinical Institute, University of Southern Denmark, Sdr. Boulevard 29, DK-5000 Odense C, Denmark.
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Samuels S, Alwan Z, Egnin M, Jaynes J, Connell TD, Bernard GC, Nashar T. Novel Therapeutic Approach for Inhibition of HIV-1 Using Cell-Penetrating Peptide and Bacterial Toxins. ACTA ACUST UNITED AC 2017; 8. [PMID: 29226013 PMCID: PMC5719890 DOI: 10.4172/2155-6113.1000737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Despite advancements in our understanding of HIV-1 pathogenesis, critical virus components for immunity, vaccines trials, and drugs development, challenges remain in the fight against HIV-1. Of great importance is the inhibitory function of microbicidal cell penetrating peptides and bacterial toxins that interfere with production and neutralize infection of HIV-1 particles. We demonstrate that the neutralizing activity of a cationic 18 amino acids peptide, is similar to a broadly neutralizing human antibody, and inhibits production of two HIV-1 strains in human cell lines. Pretreatment of cells with bacterial toxins or toxoids derived from enterotoxigenic E. coli, boost subsequent activity of the peptide against HIV-1, to inhibit simultaneously production and infection. The synthetic peptide crosses the cell membrane into the cytoplasm and nucleus. In vitro analysis of a possible target for this peptide revealed specific binding to recombinant HIV-1 gag p24. This is the first demonstration of a synergy between bacterial toxins and a cell-penetrating peptide against HIV-1.
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Affiliation(s)
- Steven Samuels
- Environment and Nutrition Sciences, Faculty of Agriculture, Tuskegee University, Tuskegee, Alabama, USA.,Department of Life and Earth Sciences, Perimeter College at Georgia State University, 555 North Indian Creek Drive, Clarkston, USA
| | - Zainab Alwan
- Department of Pathobiology, College of Veterinary Medicine, Tuskegee University, Tuskegee, Alabama, USA.,Department of Community Health, Institute of Medical Technology, Middle Technical University Baghdad, Iraq
| | - Marceline Egnin
- Environment and Nutrition Sciences, Faculty of Agriculture, Tuskegee University, Tuskegee, Alabama, USA
| | - Jessie Jaynes
- Environment and Nutrition Sciences, Faculty of Agriculture, Tuskegee University, Tuskegee, Alabama, USA
| | - Terry D Connell
- Department of Microbiology and Immunology, The Witebsky Center for Microbial Pathogenesis and Immunology, Buffalo, New York, USA
| | - Gregory C Bernard
- Environment and Nutrition Sciences, Faculty of Agriculture, Tuskegee University, Tuskegee, Alabama, USA
| | - Toufic Nashar
- Department of Pathobiology, College of Veterinary Medicine, Tuskegee University, Tuskegee, Alabama, USA
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Chen Q, Nie J, Huang W, Jiao Y, Li L, Zhang T, Zhao J, Wu H, Wang Y. Development and optimization of a sensitive pseudovirus-based assay for HIV-1 neutralizing antibodies detection using A3R5 cells. Hum Vaccin Immunother 2017; 14:199-208. [PMID: 28933644 DOI: 10.1080/21645515.2017.1373922] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Sensitive assays for HIV-1 neutralizing antibody detection are urgently needed for vaccine immunogen optimization and identification of protective immune response levels. In this study, we developed an easy-to-use HIV-1 pseudovirus neutralization assay based on a human CD4+ lymphoblastoid cell line A3R5 by employing a high efficient pseudovirus production system. Optimal conditions for cell counts, infection time, virus dose and concentration of DEAE-dextran were tested and identified. For T-cell line-adapted tier 1 virus strains, significantly higher inhibitory efficiency was observed for both monoclonal neutralizing antibody (4 fold) and plasma (2 fold) samples in A3R5 than those in TZM-bl assay. For circulating tier 2 strains, the A3R5 pseudovirus assay showed even much higher sensitivity for both neutralizing antibody (10 fold) and plasma (9 fold) samples. When sequential neutralizing antibody seroconverting samples were tested in both A3R5 and TZM-bl assays, the seroconverting points could be detected earlier for tier 1 (15.7 weeks) and tier 2 (68.3 weeks) strains in A3R5 assay respectively. The high sensitive pseudovirus assay using more physiological target cells could serve as an alternative to the TZM-bl assay for evaluation of vaccine-induced neutralizing antibodies and identification of the correlates of protection.
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Affiliation(s)
- Qingqing Chen
- a Division of HIV/AIDS and Sex-transmitted Virus Vaccines , National Institutes for Food and Drug Control (NIFDC) , Beijing , China
| | - Jianhui Nie
- a Division of HIV/AIDS and Sex-transmitted Virus Vaccines , National Institutes for Food and Drug Control (NIFDC) , Beijing , China
| | - Weijin Huang
- a Division of HIV/AIDS and Sex-transmitted Virus Vaccines , National Institutes for Food and Drug Control (NIFDC) , Beijing , China
| | - Yanmei Jiao
- b Beijing You'an Hospital, Capital Medical University , Beijing , China
| | - Lan Li
- b Beijing You'an Hospital, Capital Medical University , Beijing , China
| | - Tong Zhang
- b Beijing You'an Hospital, Capital Medical University , Beijing , China
| | - Juan Zhao
- a Division of HIV/AIDS and Sex-transmitted Virus Vaccines , National Institutes for Food and Drug Control (NIFDC) , Beijing , China
| | - Hao Wu
- b Beijing You'an Hospital, Capital Medical University , Beijing , China
| | - Youchun Wang
- a Division of HIV/AIDS and Sex-transmitted Virus Vaccines , National Institutes for Food and Drug Control (NIFDC) , Beijing , China
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Abstract
PURPOSE OF REVIEW Since 2009 many broadly neutralizing antibodies against HIV have been identified, yet there is still no vaccine capable of inducing such antibodies in humans. This review considers the early observations of HIV sera neutralization in light of more recent studies and highlights areas for future research. RECENT FINDINGS Large clinical cohort studies using standardized neutralization assays and pseudoviruses derived from primary isolates have shown that 10-30% of HIV infections result in some level of serum neutralization breadth. However, less than 10% of individuals develop a greater breadth of neutralization and are termed elite neutralizers. SUMMARY During HIV infection, many individuals develop strain-specific neutralization against their viral quasispecies, and similar immunogen-matched activity can now be induced in animal models. However, only in a minority of infections do broadly neutralizing antibodies develop. Therefore, understanding how the viral diversity, host immune environment, and antibody repertoires intersect to support the generation of neutralization breadth in elite neutralizers could provide guidelines as to how to improve immunization responses.
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Abstract
Objective: To investigate the toxicity and activity against HIV of 5-hydroxytyrosol as a potential microbicide. Design: The anti-HIV-1 activity of 5-hydroxytyrosol, a polyphenolic compound, was tested against wild-type HIV-1 and viral clones resistant to nucleoside reverse transcriptase inhibitors (NRTIs), non-nucleoside reverse transcriptase inhibitors (NNRTIs), protease inhibitors and integrase inhibitors. In addition to its activity against founder viruses, different viral subtypes and potential synergy with tenofovir disoproxil fumarate, lamivudine and emtricitabine was also tested. 5-Hydroxytyrosol toxicity was evaluated in vivo in rabbit vaginal mucosa. Methods: We have cloned pol gene from drug-resistant HIV-1 isolated from infected patients and env gene from Fiebeg III/IV patients or A, C, D, E, F and G subtypes in the NL4.3-Ren backbone. 5-Hydroxytyrosol anti-HIV-1 activity was evaluated in infections of MT-2, U87-CCR5 or peripheral blood mononuclear cells preactivated with phytohemagglutinin + interleukin-2 with viruses obtained through 293T transfections. Inhibitory concentration 50% and cytotoxic concentration 50% were calculated. Synergy was analysed according to Chou and Talalay method. In-vivo toxicity was evaluated for 14 days in rabbit vaginal mucosa. Results: 5-Hydroxytyrosol inhibited HIV-1 infections of recombinant or wild-type viruses in all the target cells tested. Moreover, 5-hydroxytyrosol showed similar inhibitory concentration 50% values for infections with NRTIs, NNRTIs, protease inhibitors and INIs resistant viruses; founder viruses and all the subtypes tested. Combination of 5-hydroxytyrosol with tenofovir was found to be synergistic, whereas it was additive with lamivudine and emtricitabine. In-vivo toxicity of 5-hydroxytyrosol was very low even at the highest tested doses. Conclusion: 5-Hydroxytyrosol displayed a broad anti-HIV-1 activity in different cells systems in the absent of in-vivo toxicity, therefore supporting its candidacy as a potential new class of microbicides.
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Xing L, Wang S, Hu Q, Li J, Zeng Y. Comparison of three quantification methods for the TZM-bl pseudovirus assay for screening of anti-HIV-1 agents. J Virol Methods 2016; 233:56-61. [PMID: 27016178 DOI: 10.1016/j.jviromet.2016.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 03/10/2016] [Accepted: 03/22/2016] [Indexed: 11/17/2022]
Abstract
The TZM-bl pseudovirus assay is commonly used to evaluate the efficacy of neutralizing antibodies and small molecular inhibitors in HIV-1 research. Here, to determine the optimal measurement method for screening anti-HIV-1 inhibitors, we compared three measurement methods based on firefly luciferase and β-galactosidase activities. The 50% tissue culture infective doses (TCID50) of the pseudoviruses were determined using the luciferase, β-galactosidase colorimetric, and 5-bromo-4-chloro-3-indolyl-β-D-galactopyranoside (X-gal) staining assays. Three commercial reverse-transcriptase inhibitors (azidothymidine, nevirapine, and lamivudine) were tested as reference drugs to compare the reproducibility, linear correlation, and half maximal inhibitory concentration (IC50) values determined using these methods. In the TCID50 assay, the sensitivity of β-galactosidase colorimetric assay was almost 562 times lower than that of the other two methods. Reproducible dose-response curves were obtained for the inhibitors with all methods; the IC50 values of the inhibitors were not significantly different. Linear regression analysis showed linear correlation between methods. Compared to the β-galactosidase colorimetric assay, the other two methods have the advantage of high sensitivity and are less affected by interference. In conclusion, the luciferase and X-gal staining assays, which can be applied either alone or combined, are recommended for anti-HIV-1 inhibitor screening.
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Affiliation(s)
- Liying Xing
- College of Life Science and Bioengineering, Beijing University of Technology, No. 100 Pingleyuan, Beijing 100124, PR China
| | - Shunyi Wang
- College of Life Science and Bioengineering, Beijing University of Technology, No. 100 Pingleyuan, Beijing 100124, PR China
| | - Qin Hu
- College of Life Science and Bioengineering, Beijing University of Technology, No. 100 Pingleyuan, Beijing 100124, PR China.
| | - Jingtao Li
- College of Life Science and Bioengineering, Beijing University of Technology, No. 100 Pingleyuan, Beijing 100124, PR China
| | - Yi Zeng
- College of Life Science and Bioengineering, Beijing University of Technology, No. 100 Pingleyuan, Beijing 100124, PR China
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King B, Temperton NJ, Grehan K, Scott SD, Wright E, Tarr AW, Daly JM. Technical considerations for the generation of novel pseudotyped viruses. Future Virol 2016. [DOI: 10.2217/fvl.15.106] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A pseudotyped virus (PV) is a virus particle with an envelope protein originating from a different virus. The ability to dictate which envelope proteins are expressed on the surface has made pseudotyping an important tool for basic virological studies such as determining the cellular targets of the envelope protein of the virus as well as identification of potential antiviral compounds and measuring specific antibody responses. In this review, we describe the common methodologies employed to generate PVs, with a focus on approaches to improve the efficacy of PV generation.
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Affiliation(s)
- Barnabas King
- School of Life Sciences & NIHR Biomedical Research Unit in Gastrointestinal & Liver Diseases, Queen's Medical Centre, University of Nottingham, Nottingham, NG7 2UH, UK
- NIHR Biomedical Research Unit in Gastrointestinal & Liver Diseases, Queen's Medical Centre, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Nigel J Temperton
- Viral Pseudotype Unit (Medway), School of Pharmacy, Anson Building, Central Avenue, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
| | - Keith Grehan
- Viral Pseudotype Unit (Medway), School of Pharmacy, Anson Building, Central Avenue, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
| | - Simon D Scott
- Viral Pseudotype Unit (Medway), School of Pharmacy, Anson Building, Central Avenue, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
| | - Edward Wright
- Viral Pseudotype Unit (Fitzrovia), Faculty of Science & Technology, University of Westminster, 115 New Cavendish Street, London, W1W 6UW, UK
| | - Alexander W Tarr
- School of Life Sciences & NIHR Biomedical Research Unit in Gastrointestinal & Liver Diseases, Queen's Medical Centre, University of Nottingham, Nottingham, NG7 2UH, UK
- NIHR Biomedical Research Unit in Gastrointestinal & Liver Diseases, Queen's Medical Centre, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Janet M Daly
- School of Veterinary Medicine & Science, University of Nottingham, Sutton Bonington Campus, Leicestershire, LE12 5RD, UK
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Vieillard V, Debré P. [Towards a vaccine against HIV: antibodies raised by a gp41 peptide neutralize the virus and inhibit pathogenesis]. Biol Aujourdhui 2015; 209:161-6. [PMID: 26514385 DOI: 10.1051/jbio/2015019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Indexed: 11/14/2022]
Abstract
In spite of numerous attempts, only one vaccine candidate showed a potentiality to prevent HIV infection. Such capacity, unfortunately partial, was due to the activity of specific antibodies, indicating the importance of humoral responses. However, the lack of a specific target did not allow to identify an epitope able to stimulate such a response. In addition, in view of a vaccine with preventive and therapeutic activities, it seems of interest to both be able to neutralize the virus and prevent its pathogenesis. We have identified a gp41 peptide inducing antibodies with such dual properties, therefore representing a future vaccine candidate to test functional capacities to fight HIV infection.
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Nilsson C, Hejdeman B, Godoy-Ramirez K, Tecleab T, Scarlatti G, Bråve A, Earl PL, Stout RR, Robb ML, Shattock RJ, Biberfeld G, Sandström E, Wahren B. HIV-DNA Given with or without Intradermal Electroporation Is Safe and Highly Immunogenic in Healthy Swedish HIV-1 DNA/MVA Vaccinees: A Phase I Randomized Trial. PLoS One 2015; 10:e0131748. [PMID: 26121679 PMCID: PMC4486388 DOI: 10.1371/journal.pone.0131748] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 06/04/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND We compared safety and immunogenicity of intradermal (ID) vaccination with and without electroporation (EP) in a phase I randomized placebo-controlled trial of an HIV-DNA prime HIV-MVA boost vaccine in healthy Swedish volunteers. METHODS HIV-DNA plasmids encoding HIV-1 genes gp160 subtypes A, B and C; Rev B; Gag A and B and RTmut B were given ID at weeks 0, 6 and 12 in a dose of 0.6 mg. Twenty-five volunteers received vaccine using a needle-free device (ZetaJet) with (n=16) or without (n=9) ID EP (Dermavax). Five volunteers were placebo recipients. Boosting with recombinant MVA-CMDR expressing HIV-1 Env, Gag, Pol of CRF01_AE (HIV-MVA) or placebo was performed at weeks 24 and 40. Nine of the vaccinees received a subtype C CN54 gp140 protein boost together with HIV-MVA. RESULTS The ID/EP delivery was very well tolerated. After three HIV-DNA immunizations, no statistically significant difference was seen in the IFN-γ ELISpot response rate to Gag between HIV-DNA ID/EP recipients (5/15, 33%) and HIV-DNA ID recipients (1/7, 14%, p=0.6158). The first HIV-MVA or HIV-MVA+gp140 vaccination increased the IFN-γ ELISpot response rate to 18/19 (95%). CD4+ and/or CD8+ T cell responses to Gag or Env were demonstrable in 94% of vaccinees. A balanced CD4+ and CD8+ T cell response was noted, with 78% and 71% responders, respectively. IFN-γ and IL-2 dominated the CD4+ T cell response to Gag and Env. The CD8+ response to Gag was broader with expression of IFN-γ, IL-2, MIP-1β and/or CD107. No differences were seen between DNA vaccine groups. Binding antibodies were induced after the second HIV-MVA+/-gp140 in 93% of vaccinees to subtype C Env, with the highest titers among EP/gp140 recipients. CONCLUSION Intradermal electroporation of HIV-DNA was well tolerated. Strong cell- and antibody-mediated immune responses were elicited by the HIV-DNA prime and HIV-MVA boosting regimen, with or without intradermal electroporation use. TRIAL REGISTRATION International Standard Randomised Controlled Trial Number (ISRCTN) 60284968.
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Affiliation(s)
- Charlotta Nilsson
- Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden
- Department of Microbiology, Tumor and Cell biology, Karolinska Institutet, Stockholm, Sweden
- Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
- * E-mail:
| | - Bo Hejdeman
- Venhälsan, Department of Education and Clinical Research, Karolinska Institutet, Södersjukhuset, Stockholm, Sweden
| | | | - Teghesti Tecleab
- Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden
| | - Gabriella Scarlatti
- Viral Evolution and Transmission Unit, Division of Immunology, Transplantation and infectious diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Andreas Bråve
- Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden
| | - Patricia L. Earl
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda MD, United States of America
| | | | - Merlin L. Robb
- Military HIV Research Program, Walter Reed Army Institute of Research, Rockville, Maryland, United States of America
| | - Robin J. Shattock
- Imperial College London, Department of Infectious Diseases, Division of Medicine, Norfolk Place, London, United Kingdom
| | - Gunnel Biberfeld
- Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden
- Department of Microbiology, Tumor and Cell biology, Karolinska Institutet, Stockholm, Sweden
| | - Eric Sandström
- Venhälsan, Department of Education and Clinical Research, Karolinska Institutet, Södersjukhuset, Stockholm, Sweden
| | - Britta Wahren
- Department of Microbiology, Tumor and Cell biology, Karolinska Institutet, Stockholm, Sweden
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Joachim A, Nilsson C, Aboud S, Bakari M, Lyamuya EF, Robb ML, Marovich MA, Earl P, Moss B, Ochsenbauer C, Wahren B, Mhalu F, Sandström E, Biberfeld G, Ferrari G, Polonis VR. Potent functional antibody responses elicited by HIV-I DNA priming and boosting with heterologous HIV-1 recombinant MVA in healthy Tanzanian adults. PLoS One 2015; 10:e0118486. [PMID: 25874723 PMCID: PMC4396991 DOI: 10.1371/journal.pone.0118486] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 01/18/2015] [Indexed: 12/19/2022] Open
Abstract
Vaccine-induced HIV antibodies were evaluated in serum samples collected from healthy Tanzanian volunteers participating in a phase I/II placebo-controlled double blind trial using multi-clade, multigene HIV-DNA priming and recombinant modified vaccinia Ankara (HIV-MVA) virus boosting (HIVIS03). The HIV-DNA vaccine contained plasmids expressing HIV-1 gp160 subtypes A, B, C, Rev B, Gag A, B and RTmut B, and the recombinant HIV-MVA boost expressed CRF01_AE HIV-1 Env subtype E and Gag-Pol subtype A. While no neutralizing antibodies were detected using pseudoviruses in the TZM-bl cell assay, this prime-boost vaccination induced neutralizing antibodies in 83% of HIVIS03 vaccinees when a peripheral blood mononuclear cell (PBMC) assay using luciferase reporter-infectious molecular clones (LucR-IMC) was employed. The serum neutralizing activity was significantly (but not completely) reduced upon depletion of natural killer (NK) cells from PBMC (p=0.006), indicating a role for antibody-mediated Fcγ-receptor function. High levels of antibody-dependent cellular cytotoxicity (ADCC)-mediating antibodies against CRF01_AE and/or subtype B were subsequently demonstrated in 97% of the sera of vaccinees. The magnitude of ADCC-mediating antibodies against CM235 CRF01_AE IMC-infected cells correlated with neutralizing antibodies against CM235 in the IMC/PBMC assay. In conclusion, HIV-DNA priming, followed by two HIV-MVA boosts elicited potent ADCC responses in a high proportion of Tanzanian vaccinees. Our findings highlight the potential of HIV-DNA prime HIV-MVA boost vaccines for induction of functional antibody responses and suggest this vaccine regimen and ADCC studies as potentially important new avenues in HIV vaccine development.
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Affiliation(s)
- Agricola Joachim
- Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
- * E-mail:
| | - Charlotta Nilsson
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
- Public Health Agency of Sweden, Solna, Sweden
- Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Said Aboud
- Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Muhammad Bakari
- Department of Internal Medicine, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Eligius F. Lyamuya
- Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Merlin L. Robb
- The Military HIV Research Program, The Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, United States of America
| | - Mary A. Marovich
- The Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Patricia Earl
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Bernard Moss
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Christina Ochsenbauer
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Britta Wahren
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Fred Mhalu
- Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Eric Sandström
- Venhälsan, Karolinska Institutet at Södersjukhuset, Stockholm, Sweden
| | - Gunnel Biberfeld
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
- Public Health Agency of Sweden, Solna, Sweden
| | - Guido Ferrari
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Victoria R. Polonis
- The Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
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Single-chain protein mimetics of the N-terminal heptad-repeat region of gp41 with potential as anti-HIV-1 drugs. Proc Natl Acad Sci U S A 2014; 111:18207-12. [PMID: 25489108 DOI: 10.1073/pnas.1413592112] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
During HIV-1 fusion to the host cell membrane, the N-terminal heptad repeat (NHR) and the C-terminal heptad repeat (CHR) of the envelope subunit gp41 become transiently exposed and accessible to fusion inhibitors or Abs. In this process, the NHR region adopts a trimeric coiled-coil conformation that can be a target for therapeutic intervention. Here, we present an approach to rationally design single-chain protein constructs that mimic the NHR coiled-coil surface. The proteins were built by connecting with short loops two parallel NHR helices and an antiparallel one with the inverse sequence followed by engineering of stabilizing interactions. The constructs were expressed in Escherichia coli, purified with high yield, and folded as highly stable helical coiled coils. The crystal structure of one of the constructs confirmed the predicted fold and its ability to accurately mimic an exposed gp41 NHR surface. These single-chain proteins bound to synthetic CHR peptides with very high affinity, and furthermore, they showed broad inhibitory activity of HIV-1 fusion on various pseudoviruses and primary isolates.
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30
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Sheik-Khalil E, Bray MA, Özkaya Şahin G, Scarlatti G, Jansson M, Carpenter AE, Fenyö EM. Automated image-based assay for evaluation of HIV neutralization and cell-to-cell fusion inhibition. BMC Infect Dis 2014; 14:472. [PMID: 25176034 PMCID: PMC4261578 DOI: 10.1186/1471-2334-14-472] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 08/18/2014] [Indexed: 12/04/2022] Open
Abstract
Background Standardized techniques to detect HIV-neutralizing antibody responses are of great importance in the search for an HIV vaccine. Methods Here, we present a high-throughput, high-content automated plaque reduction (APR) assay based on automated microscopy and image analysis that allows evaluation of neutralization and inhibition of cell-cell fusion within the same assay. Neutralization of virus particles is measured as a reduction in the number of fluorescent plaques, and inhibition of cell-cell fusion as a reduction in plaque area. Results We found neutralization strength to be a significant factor in the ability of virus to form syncytia. Further, we introduce the inhibitory concentration of plaque area reduction (ICpar) as an additional measure of antiviral activity, i.e. fusion inhibition. Conclusions We present an automated image based high-throughput, high-content HIV plaque reduction assay. This allows, for the first time, simultaneous evaluation of neutralization and inhibition of cell-cell fusion within the same assay, by quantifying the reduction in number of plaques and mean plaque area, respectively. Inhibition of cell-to-cell fusion requires higher quantities of inhibitory reagent than inhibition of virus neutralization. Electronic supplementary material The online version of this article (doi:10.1186/1471-2334-14-472) contains supplementary material, which is available to authorized users.
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Dang N, Sivakumaran H, Harrich D, Shaw PN, Coombes AG. Evaluation of Polycaprolactone Matrices for Sustained Vaginal Delivery of Nevirapine in the Prevention of Heterosexual HIV Transmission. J Pharm Sci 2014; 103:2107-2115. [DOI: 10.1002/jps.24030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 03/24/2014] [Accepted: 05/05/2014] [Indexed: 11/07/2022]
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Stoddart CA, Galkina SA, Joshi P, Kosikova G, Long BR, Maidji E, Moreno ME, Rivera JM, Sanford UR, Sloan B, Cieplak W, Wrin T, Chan-Hui PY. Efficacy of broadly neutralizing monoclonal antibody PG16 in HIV-infected humanized mice. Virology 2014; 462-463:115-25. [PMID: 24971704 DOI: 10.1016/j.virol.2014.05.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 05/13/2014] [Accepted: 05/19/2014] [Indexed: 11/26/2022]
Abstract
Highly potent broadly neutralizing human monoclonal antibodies hold promise for HIV prophylaxis and treatment. We used the SCID-hu Thy/Liv and BLT humanized mouse models to study the efficacy of these antibodies, primarily PG16, against HIV-1 clades A, B, and C. PG16 targets a conserved epitope in the V1/V2 region of gp120 common to 70-80% of HIV-1 isolates from multiple clades and has extremely potent in vitro activity against HIVJR-CSF. PG16 was highly efficacious in SCID-hu mice as a single intraperitoneal administration the day before inoculation of R5-tropic HIV directly into their Thy/Liv implants and demonstrated even greater efficacy if PG16 administration was continued after Thy/Liv implant HIV inoculation. However, PG16 as monotherapy had no activity in humanized mice with established R5-tropic HIV infection. These results provide evidence of tissue penetration of the antibodies, which could aid in their ability to prevent infection if virus crosses the mucosal barrier.
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Affiliation(s)
- Cheryl A Stoddart
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA.
| | - Sofiya A Galkina
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Pheroze Joshi
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Galina Kosikova
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Brian R Long
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Ekaterina Maidji
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Mary E Moreno
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Jose M Rivera
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Ukina R Sanford
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | - Barbara Sloan
- Division of Experimental Medicine, Department of Medicine, San Francisco General Hospital, University of California, Box 1234, San Francisco, San Francisco, CA 94143, USA
| | | | - Terri Wrin
- Monogram Biosciences, South San Francisco, CA 94080, USA
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Sarzotti-Kelsoe M, Daniell X, Todd CA, Bilska M, Martelli A, LaBranche C, Perez LG, Ochsenbauer C, Kappes JC, Rountree W, Denny TN, Montefiori DC. Optimization and validation of a neutralizing antibody assay for HIV-1 in A3R5 cells. J Immunol Methods 2014; 409:147-60. [PMID: 24607608 DOI: 10.1016/j.jim.2014.02.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 01/22/2014] [Accepted: 02/26/2014] [Indexed: 12/20/2022]
Abstract
A3R5 is a human CD4(+) lymphoblastoid cell line that was engineered to express CCR5 and is useful for the detection of weak neutralizing antibody responses against tier 2 strains of HIV-1. Here we describe the optimization and validation of the HIV-1 neutralizing antibody assay that utilizes A3R5 cells, performed in compliance with Good Clinical Laboratory Practice (GCLP) guidelines. The assay utilizes Renilla luciferase-expressing replication competent infectious molecular clones (IMC) encoding heterologous env genes from different HIV-1 clades. Key assay validation parameters tested included specificity, accuracy, precision, limit of detection and quantitation, specificity, linearity and range, and robustness. Plasma samples demonstrated higher non-specific activity than serum samples in the A3R5 assay. This assay can tolerate a wide range of virus input but is more sensitive to cell concentration. The higher sensitivity of the A3R5 assay in neutralization responses to tier 2 strains of HIV-1 makes it complementary to, but not a substitute for the TZM-bl assay. The validated A3R5 assay is employed as an endpoint immunogenicity test for vaccine-elicited neutralizing antibodies against tier 2 strains of HIV-1, and to identify correlates of protection in HIV-1 vaccine trials conducted globally.
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Affiliation(s)
- Marcella Sarzotti-Kelsoe
- Department of Immunology, Duke University Medical Center, Durham, NC, USA; Department of Surgery, Duke University Medical Center, Durham, NC, USA; Duke Human Vaccine Institute, Durham, NC, USA.
| | - Xiaoju Daniell
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | | | - Miroslawa Bilska
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Amanda Martelli
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Celia LaBranche
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Lautaro G Perez
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | | | - John C Kappes
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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Wieczorek L, Brown BK, DelSarto Macedo C, Wesberry-Schmierer M, Ngauy V, Rosa Borges A, Michael NL, Marovich MA, Montefiori DC, Polonis VR. Mitigation of variation observed in a peripheral blood mononuclear cell (PBMC) based HIV-1 neutralization assay by donor cell pooling. Virology 2013; 447:240-8. [DOI: 10.1016/j.virol.2013.09.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 07/25/2013] [Accepted: 09/13/2013] [Indexed: 10/26/2022]
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Optimization and validation of the TZM-bl assay for standardized assessments of neutralizing antibodies against HIV-1. J Immunol Methods 2013; 409:131-46. [PMID: 24291345 DOI: 10.1016/j.jim.2013.11.022] [Citation(s) in RCA: 394] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 11/15/2013] [Indexed: 11/21/2022]
Abstract
The TZM-bl assay measures antibody-mediated neutralization of HIV-1 as a function of reductions in HIV-1 Tat-regulated firefly luciferase (Luc) reporter gene expression after a single round of infection with Env-pseudotyped viruses. This assay has become the main endpoint neutralization assay used for the assessment of pre-clinical and clinical trial samples by a growing number of laboratories worldwide. Here we present the results of the formal optimization and validation of the TZM-bl assay, performed in compliance with Good Clinical Laboratory Practice (GCLP) guidelines. The assay was evaluated for specificity, accuracy, precision, limits of detection and quantitation, linearity, range and robustness. The validated manual TZM-bl assay was also adapted, optimized and qualified to an automated 384-well format.
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36
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McLinden RJ, LaBranche CC, Chenine AL, Polonis VR, Eller MA, Wieczorek L, Ochsenbauer C, Kappes JC, Perfetto S, Montefiori DC, Michael NL, Kim JH. Detection of HIV-1 neutralizing antibodies in a human CD4⁺/CXCR4⁺/CCR5⁺ T-lymphoblastoid cell assay system. PLoS One 2013; 8:e77756. [PMID: 24312168 PMCID: PMC3842913 DOI: 10.1371/journal.pone.0077756] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 09/09/2013] [Indexed: 11/18/2022] Open
Abstract
Sensitive assays are needed to meaningfully assess low levels of neutralizing antibodies (NAbs) that may be important for protection against the acquisition of HIV-1 infection in vaccine recipients. The current assay of choice uses a non-lymphoid cell line (TZM-bl) that may lack sensitivity owing to over expression of CD4 and CCR5. We used transfection of a human CD4+/CXCR4+/α4β7+ T-lymphoblastoid cell line (A3.01) with a CMV IE promoter-driven CCR5neo vector to stably express CCR5. The resulting line, designated A3R5, is permissive to a wide range of CCR5-tropic circulating strains of HIV-1, including HIV-1 molecular clones containing a Tat-inducible Renilla luciferase reporter gene and expressing multiple Env subtypes. Flow cytometric analysis found CCR5 surface expression on A3R5 cells to be markedly less than TZM-bl but similar to CD3.8 stimulated PBMC. More importantly, neutralization mediated by a diverse panel of monoclonal antibodies, HIV-1 positive polyclonal sera and sCD4 was consistently greater in A3R5 compared to TZM-bl cells. The A3R5 cell line provides a novel approach to guide the development and qualification of promising new HIV-1 vaccine immunogens.
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Affiliation(s)
- Robert J. McLinden
- Military HIV- Research Program, WRAIR, Silver Spring, Maryland, United States of America
- * E-mail:
| | - Celia C. LaBranche
- Department of Surgery, Duke U. Medical Center, Durham, North Carolina, United States of America
| | - Agnès-Laurence Chenine
- Military HIV- Research Program, WRAIR, Silver Spring, Maryland, United States of America
| | - Victoria R. Polonis
- Military HIV- Research Program, WRAIR, Silver Spring, Maryland, United States of America
| | - Michael A. Eller
- Military HIV- Research Program, WRAIR, Silver Spring, Maryland, United States of America
| | - Lindsay Wieczorek
- Military HIV- Research Program, WRAIR, Silver Spring, Maryland, United States of America
| | - Christina Ochsenbauer
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - John C. Kappes
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Birmingham Veterans Affairs Medical Center, Research Service, Birmingham, Alabama, United States of America
| | - Stephen Perfetto
- Vaccine Research Center, NIH, Bethesda, Maryland, United States of America
| | - David C. Montefiori
- Department of Surgery, Duke U. Medical Center, Durham, North Carolina, United States of America
| | - Nelson L. Michael
- Military HIV- Research Program, WRAIR, Silver Spring, Maryland, United States of America
| | - Jerome H. Kim
- Military HIV- Research Program, WRAIR, Silver Spring, Maryland, United States of America
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Alexandre KB, Moore PL, Nonyane M, Gray ES, Ranchobe N, Chakauya E, McMahon JB, O’Keefe BR, Chikwamba R, Morris L. Mechanisms of HIV-1 subtype C resistance to GRFT, CV-N and SVN. Virology 2013; 446:66-76. [PMID: 24074568 PMCID: PMC3787538 DOI: 10.1016/j.virol.2013.07.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 03/15/2013] [Accepted: 07/18/2013] [Indexed: 11/30/2022]
Abstract
We examined the ability of HIV-1 subtype C to develop resistance to the inhibitory lectins, griffithsin (GRFT), cyanovirin-N (CV-N) and scytovirin (SVN), which bind multiple mannose-rich glycans on gp120. Four primary HIV-1 strains cultured under escalating concentrations of these lectins became increasingly resistant tolerating 2 to 12 times their 50% inhibitory concentrations. Sequence analysis of gp120 showed that most had deletions of 1 to 5 mannose-rich glycans. Glycosylation sites at positions 230, 234, 241, 289 located in the C2 region and 339, 392 and 448 in the C3-C4 region were affected. Furthermore, deletions and insertions of up to 5 amino acids in the V4 region were observed in 3 of the 4 isolates. These data suggest that loss of glycosylation sites on gp120 as well as rearrangement of glycans in V4 are mechanisms involved in HIV-1 subtype C escape from GRFT, CV-N and SVN.
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Affiliation(s)
- Kabamba B. Alexandre
- Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
- University of the Witwatersrand, Johannesburg, South Africa
| | - Penny L. Moore
- Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
- University of the Witwatersrand, Johannesburg, South Africa
| | - Molati Nonyane
- Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
| | - Elin S. Gray
- Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
| | - Nthabeleng Ranchobe
- Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
| | - Ereck Chakauya
- Council for Scientific and Industrial Research, Pretoria, South Africa
| | - James B. McMahon
- Molecular Targets Laboratory, Center for Cancer Research, NCI-Frederick, Maryland, USA
| | - Barry R. O’Keefe
- Molecular Targets Laboratory, Center for Cancer Research, NCI-Frederick, Maryland, USA
| | - Rachel Chikwamba
- Council for Scientific and Industrial Research, Pretoria, South Africa
| | - Lynn Morris
- Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa
- University of the Witwatersrand, Johannesburg, South Africa
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Dang NT, Sivakumaran H, Harrich D, Coombes AG. An Evaluation of Polycaprolactone Matrices for Vaginal Delivery of the Antiviral, Tenofovir, in Preventing Heterosexual Transmission of HIV. J Pharm Sci 2013; 102:3725-35. [DOI: 10.1002/jps.23684] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 05/28/2013] [Accepted: 07/09/2013] [Indexed: 12/23/2022]
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Optimization of HIV-1 Envelope DNA Vaccine Candidates within Three Different Animal Models, Guinea Pigs, Rabbits and Cynomolgus Macaques. Vaccines (Basel) 2013; 1:305-27. [PMID: 26344115 PMCID: PMC4494233 DOI: 10.3390/vaccines1030305] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 07/05/2013] [Accepted: 07/10/2013] [Indexed: 11/17/2022] Open
Abstract
HIV-1 DNA vaccines have many advantageous features. Evaluation of HIV-1 vaccine candidates often starts in small animal models before macaque and human trials. Here, we selected and optimized DNA vaccine candidates through systematic testing in rabbits for the induction of broadly neutralizing antibodies (bNAb). We compared three different animal models: guinea pigs, rabbits and cynomolgus macaques. Envelope genes from the prototype isolate HIV-1 Bx08 and two elite neutralizers were included. Codon-optimized genes, encoded secreted gp140 or membrane bound gp150, were modified for expression of stabilized soluble trimer gene products, and delivered individually or mixed. Specific IgG after repeated i.d. inoculations with electroporation confirmed in vivo expression and immunogenicity. Evaluations of rabbits and guinea pigs displayed similar results. The superior DNA construct in rabbits was a trivalent mix of non-modified codon-optimized gp140 envelope genes. Despite NAb responses with some potency and breadth in guinea pigs and rabbits, the DNA vaccinated macaques displayed less bNAb activity. It was concluded that a trivalent mix of non-modified gp140 genes from rationally selected clinical isolates was, in this study, the best option to induce high and broad NAb in the rabbit model, but this optimization does not directly translate into similar responses in cynomolgus macaques.
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Balla-Jhagjhoorsingh SS, Corti D, Heyndrickx L, Willems E, Vereecken K, Davis D, Vanham G. The N276 glycosylation site is required for HIV-1 neutralization by the CD4 binding site specific HJ16 monoclonal antibody. PLoS One 2013; 8:e68863. [PMID: 23874792 PMCID: PMC3714269 DOI: 10.1371/journal.pone.0068863] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 05/31/2013] [Indexed: 11/19/2022] Open
Abstract
Immunogen design for HIV-1 vaccines could be based on epitope identification of naturally occurring neutralizing antibodies in infected patients. A tier 2 neutralizing monoclonal antibody (mAb), HJ16 recognizes a new epitope in the CD4 binding site (CD4bs) region that only partially overlaps with the b12 epitope. We aimed to identify the critical binding site by resistance induction in a sensitive primary CRF02_AG strain. In four independent dose-escalation studies, the N276D mutation was consistently the only alteration found and it was confirmed to be responsible for resistance to HJ16 by site-directed mutagenesis in envelopes (envs) of the homologous CRF02_AG, as well as of a subtype A and a subtype C primary isolate. This mutation removes an N-linked glycosylation site. The effect of N276D was very selective, as it failed to confer resistance to a range of other entry inhibitors. Remarkably, sensitivity to the CD4bs VRC01 and VRC03 mAbs was increased in the N276D mutated viruses. These data indicate that binding of the CD4bs specific HJ16 mAb critically depends on the interaction with the N276-glycan, thus indicating that HJ16 is the first glycan dependent CD4bs-specific mAb.
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Petitdemange C, Achour A, Dispinseri S, Malet I, Sennepin A, Ho Tsong Fang R, Crouzet J, Marcelin AG, Calvez V, Scarlatti G, Debré P, Vieillard V. A single amino-acid change in a highly conserved motif of gp41 elicits HIV-1 neutralization and protects against CD4 depletion. Clin Infect Dis 2013; 57:745-55. [PMID: 23696512 DOI: 10.1093/cid/cit335] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The induction of neutralizing antibodies against conserved regions of the human immunodeficiency virus type 1 (HIV-1) envelope protein is a major goal of vaccine strategies. We previously identified 3S, a critical conserved motif of gp41 that induces the NKp44L ligand of an activating NK receptor. In vivo, anti-3S antibodies protect against the natural killer (NK) cell-mediated CD4 depletion that occurs without efficient viral neutralization. METHODS Specific substitutions within the 3S peptide motif were prepared by directed mutagenesis. Virus production was monitored by measuring the p24 production. Neutralization assays were performed with immune-purified antibodies from immunized mice and a cohort of HIV-infected patients. Expression of NKp44L on CD4(+) T cells and degranulation assay on activating NK cells were both performed by flow cytometry. RESULTS Here, we show that specific substitutions in the 3S motif reduce viral infection without affecting gp41 production, while decreasing both its capacity to induce NKp44L expression on CD4(+) T cells and its sensitivity to autologous NK cells. Generation of antibodies in mice against the W614 specific position in the 3S motif elicited a capacity to neutralize cross-clade viruses, notable in its magnitude, breadth, and durability. Antibodies against this 3S variant were also detected in sera from some HIV-1-infected patients, demonstrating both neutralization activity and protection against CD4 depletion. CONCLUSIONS These findings suggest that a specific substitution in a 3S-based immunogen might allow the generation of specific antibodies, providing a foundation for a rational vaccine that combine a capacity to neutralize HIV-1 and to protect CD4(+) T cells.
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Abstract
The detailed examination of the antibody repertoire from RV144 provides a unique template for understanding potentially protective antibody functions. Some potential immune correlates of protection were untested in the correlates analyses due to inherent assay limitations, as well as the need to keep the correlates analysis focused on a limited number of endpoints to achieve statistical power. In an RV144 pilot study, we determined that RV144 vaccination elicited antibodies that could bind infectious virions (including the vaccine strains HIV-1 CM244 and HIV-1 MN and an HIV-1 strain expressing transmitted/founder Env, B.WITO.c). Among vaccinees with the highest IgG binding antibody profile, the majority (78%) captured the infectious vaccine strain virus (CM244), while a smaller proportion of vaccinees (26%) captured HIV-1 transmitted/founder Env virus. We demonstrated that vaccine-elicited HIV-1 gp120 antibodies of multiple specificities (V3, V2, conformational C1, and gp120 conformational) mediated capture of infectious virions. Although capture of infectious HIV-1 correlated with other humoral immune responses, the extent of variation between these humoral responses and virion capture indicates that virion capture antibodies occupy unique immunological space.
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43
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Generation of HIV-1 potent and broad neutralizing antibodies by immunization with postfusion HR1/HR2 complex. AIDS 2013; 27:717-30. [PMID: 23719346 DOI: 10.1097/qad.0b013e32835cfca5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND The envelope glycoproteins are major targets for HIV vaccines. The N-terminal and the C-terminal regions of the gp41 interact to form six helix bundles that are responsible for the fusion between the viral and the target cell membranes. Monoclonal antibodies (Abs) able to disrupt the formation of this complex or to interfere with it could inhibit HIV fusion. Most of the well described gp41-specific broadly neutralizing Abs target conformational epitopes within the membrane proximal region of gp41 (MPER) and recognize linear peptides. METHOD AND RESULTS In this study, a stable human transfected cell line, expressing a well folded heptad repeat regions 1 (HR1)/HR2 postfusion complex was developed. Transfected cells were highly immunogenic in mice and allowed the generation of 40 complex specific B-cell clones. Three of them were able to neutralize efficiently both HIV-1 laboratory adapted virus and primary isolates from different clades. Two neutralizing Abs (Nabs) FC-2 and FC-3 bound to a recombinant folded gp140 and blocked with a high potency HR1/HR2 fusion complex formation in vitro. The conformational epitopes of the three antibodies are different to 2F5, 4E10, D5 or NC-1 and mainly located in the MPER region. Abs were capable of inhibiting syncytium formation by blocking spatial interactions between HR1 and HR2 regions. CONCLUSION These findings suggest that immunogenicity of gp41 is achievable and that the use of a fusion complex expressing human cell line is a highly potent immunogen to generate neutralizing antibodies against gp41 envelope glycoprotein.
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Almeida DV, Morgado MG, Côrtes FH, Guimarães ML, Mendonça-Lima L, Pilotto JH, Grinsztejn B, Veloso VG, Bongertz V. Short communication: neutralizing antibodies in HIV-1-infected Brazilian individuals. AIDS Res Hum Retroviruses 2013; 29:488-92. [PMID: 23145941 DOI: 10.1089/aid.2012.0052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Tests for the detection of the humoral immune response to HIV-1 have to be standardized and established, demanding regional efforts. For this purpose the neutralizing antibody (NAb) assay for HIV-1 in TZM-bl cells was introduced in Brazil. Twenty plasma samples from HIV-1-infected individuals were assayed: 10 progressors and 10 long-term nonprogressors. These were tested against eight env-pseudotyped viruses (psVs) in the TZM-bl NAb assay and against HIV-1 strain HTLV/IIIB (HIV-1 IIIB) in primary lymphocytes. Forty-four percent of the samples showed neutralizing titers for psVs and 55% for HIV-1 IIIB. Plasma from progressors showed a broader neutralization and a higher potency. The introduction of these reference reagents encourages the participation of Brazil in future comparative assessments of anti-HIV-1 antibodies.
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Affiliation(s)
| | - Mariza Gonçalvez Morgado
- AIDS and Molecular Immunology Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | - Fernanda Heloise Côrtes
- AIDS and Molecular Immunology Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | | | - Leila Mendonça-Lima
- Functional Genomics and Bioinformatics Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | - Jose Henrique Pilotto
- AIDS and Molecular Immunology Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | - Beatriz Grinsztejn
- Evandro Chagas Clinical Research Institute, Fiocruz, Rio de Janeiro, Brazil
| | | | - Vera Bongertz
- AIDS and Molecular Immunology Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
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[Analytic and integrative perspectives for HIV vaccine design]. Uirusu 2013; 63:219-32. [PMID: 25366056 DOI: 10.2222/jsv.63.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Prophylactic AIDS vaccines are required to optimally load adaptive immune responses against a virus optimally designed to impair those responses and induce persistent infection. This inevitably may necessitate atypical induction patterns that are distinct from well-balanced responses deriving from the inherent immunological framework. This review discusses how the diverse features of pathologic context-dependent T-cell (CTL/Th) and B-cell (neutralizing antibody) responses may be incorporated into vaccine-induced immunity to achieve HIV control in vivo.
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46
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Schultz A, Koch S, Fuss M, Mazzotta AS, Sarzotti-Kelsoe M, Ozaki DA, Montefiori DC, von Briesen H, Zimmermann H, Meyerhans A. An automated HIV-1 Env-pseudotyped virus production for global HIV vaccine trials. PLoS One 2012; 7:e51715. [PMID: 23300558 PMCID: PMC3531445 DOI: 10.1371/journal.pone.0051715] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 11/05/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Infections with HIV still represent a major human health problem worldwide and a vaccine is the only long-term option to fight efficiently against this virus. Standardized assessments of HIV-specific immune responses in vaccine trials are essential for prioritizing vaccine candidates in preclinical and clinical stages of development. With respect to neutralizing antibodies, assays with HIV-1 Env-pseudotyped viruses are a high priority. To cover the increasing demands of HIV pseudoviruses, a complete cell culture and transfection automation system has been developed. METHODOLOGY/PRINCIPAL FINDINGS The automation system for HIV pseudovirus production comprises a modified Tecan-based Cellerity system. It covers an area of 5×3 meters and includes a robot platform, a cell counting machine, a CO(2) incubator for cell cultivation and a media refrigerator. The processes for cell handling, transfection and pseudovirus production have been implemented according to manual standard operating procedures and are controlled and scheduled autonomously by the system. The system is housed in a biosafety level II cabinet that guarantees protection of personnel, environment and the product. HIV pseudovirus stocks in a scale from 140 ml to 1000 ml have been produced on the automated system. Parallel manual production of HIV pseudoviruses and comparisons (bridging assays) confirmed that the automated produced pseudoviruses were of equivalent quality as those produced manually. In addition, the automated method was fully validated according to Good Clinical Laboratory Practice (GCLP) guidelines, including the validation parameters accuracy, precision, robustness and specificity. CONCLUSIONS An automated HIV pseudovirus production system has been successfully established. It allows the high quality production of HIV pseudoviruses under GCLP conditions. In its present form, the installed module enables the production of 1000 ml of virus-containing cell culture supernatant per week. Thus, this novel automation facilitates standardized large-scale productions of HIV pseudoviruses for ongoing and upcoming HIV vaccine trials.
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Affiliation(s)
- Anke Schultz
- Fraunhofer Institute for Biomedical Engineering, St. Ingbert, Germany
| | - Stefanie Koch
- Department of Virology, Saarland University, Homburg, Germany
| | - Martina Fuss
- Department of Virology, Saarland University, Homburg, Germany
| | | | - Marcella Sarzotti-Kelsoe
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Daniel A. Ozaki
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - David C. Montefiori
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Hagen von Briesen
- Fraunhofer Institute for Biomedical Engineering, St. Ingbert, Germany
| | - Heiko Zimmermann
- Fraunhofer Institute for Biomedical Engineering, St. Ingbert, Germany
| | - Andreas Meyerhans
- Department of Virology, Saarland University, Homburg, Germany
- ICREA Infection Biology Laboratory, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
- * E-mail:
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Optimization and proficiency testing of a pseudovirus-based assay for detection of HIV-1 neutralizing antibody in China. J Virol Methods 2012; 185:267-75. [DOI: 10.1016/j.jviromet.2012.07.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 06/28/2012] [Accepted: 07/04/2012] [Indexed: 11/23/2022]
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Neutralizing antibodies inhibit HIV-1 transfer from primary dendritic cells to autologous CD4 T lymphocytes. Blood 2012; 120:3708-17. [DOI: 10.1182/blood-2012-03-418913] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractDendritic cells (DCs) support only low levels of HIV-1 replication, but have been shown to transfer infectious viral particles highly efficiently to neighboring permissive CD4 T lymphocytes. This mode of cell-to-cell HIV-1 spread may be a predominant mode of infection and dissemination. In the present study, we analyzed the kinetics of fusion, replication, and the ability of HIV-1–specific Abs to inhibit HIV-1 transfer from immature DCs to autologous CD4 T lymphocytes. We found that neutralizing mAbs prevented HIV-1 transfer to CD4 T lymphocytes in trans and in cis, whereas nonneutralizing Abs did not. Neutralizing Abs also significantly decreased HIV-1 replication in DCs, even when added 2 hours after HIV-1 infection. Interestingly, a similar inhibition of HIV-1 replication in DCs was detected with some nonneutralizing Abs and was correlated with DC maturation. We suggest that the binding of HIV-1-specific Abs to FcγRs leads to HIV-1 inhibition in DCs by triggering DC maturation. This efficient inhibition of HIV-1 transfer by Abs highlights the importance of inducing HIV-specific Abs by vaccination directly at the mucosal portal of HIV-1 entry to prevent early dissemination after sexual transmission.
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Euler Z, Schuitemaker H. Cross-reactive broadly neutralizing antibodies: timing is everything. Front Immunol 2012; 3:215. [PMID: 22833745 PMCID: PMC3400945 DOI: 10.3389/fimmu.2012.00215] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 07/03/2012] [Indexed: 11/23/2022] Open
Abstract
The recent surge of research into new broadly neutralizing antibodies in HIV-1 infection has recharged the field of HIV-1 vaccinology. In this review we discuss the currently known broadly neutralizing antibodies and focus on factors that may shape these antibodies in natural infection. We further discuss the role of these antibodies in the clinical course of the infection and consider immunological obstacles in inducing broadly neutralizing antibodies with a vaccine.
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Affiliation(s)
- Zelda Euler
- Landsteiner Laboratory, Sanquin Research, Amsterdam, Netherlands
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50
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Mabuka J, Nduati R, Odem-Davis K, Peterson D, Overbaugh J. HIV-specific antibodies capable of ADCC are common in breastmilk and are associated with reduced risk of transmission in women with high viral loads. PLoS Pathog 2012; 8:e1002739. [PMID: 22719248 PMCID: PMC3375288 DOI: 10.1371/journal.ppat.1002739] [Citation(s) in RCA: 180] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 04/23/2012] [Indexed: 01/25/2023] Open
Abstract
There are limited data describing the functional characteristics of HIV-1 specific antibodies in breast milk (BM) and their role in breastfeeding transmission. The ability of BM antibodies to bind HIV-1 envelope, neutralize heterologous and autologous viruses and direct antibody-dependent cell cytotoxicity (ADCC) were analyzed in BM and plasma obtained soon after delivery from 10 non-transmitting and 9 transmitting women with high systemic viral loads and plasma neutralizing antibodies (NAbs). Because subtype A is the dominant subtype in this cohort, a subtype A envelope variant that was sensitive to plasma NAbs was used to assess the different antibody activities. We found that NAbs against the subtype A heterologous virus and/or the woman's autologous viruses were rare in IgG and IgA purified from breast milk supernatant (BMS)--only 4 of 19 women had any detectable NAb activity against either virus. Detected NAbs were of low potency (median IC50 value of 10 versus 647 for the corresponding plasma) and were not associated with infant infection (p = 0.58). The low NAb activity in BMS versus plasma was reflected in binding antibody levels: HIV-1 envelope specific IgG titers were 2.2 log(10) lower (compared to 0.59 log(10) lower for IgA) in BMS versus plasma. In contrast, antibodies capable of ADCC were common and could be detected in the BMS from all 19 women. BMS envelope-specific IgG titers were associated with both detection of IgG NAbs (p = 0.0001) and BMS ADCC activity (p = 0.014). Importantly, BMS ADCC capacity was inversely associated with infant infection risk (p = 0.039). Our findings indicate that BMS has low levels of envelope specific IgG and IgA with limited neutralizing activity. However, this small study of women with high plasma viral loads suggests that breastmilk ADCC activity is a correlate of transmission that may impact infant infection risk.
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Affiliation(s)
- Jennifer Mabuka
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Program of Pathobiology, Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - Ruth Nduati
- Department of Pediatrics, University of Nairobi, Nairobi, Kenya
| | - Katherine Odem-Davis
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Dylan Peterson
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Julie Overbaugh
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
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