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Jang H, Ross TM. Influence of the H1N1 influenza pandemic on the humoral immune response to seasonal flu vaccines. PLoS One 2021; 16:e0258453. [PMID: 34679115 PMCID: PMC8535392 DOI: 10.1371/journal.pone.0258453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 09/27/2021] [Indexed: 11/18/2022] Open
Abstract
In this study, we hypothesized that the humoral response to trivalent seasonal influenza virus vaccines was influenced by rapid antigenic switching of H1 HA. We tested archived sera and peripheral blood mononuclear cells (PBMC) collected at prior to vaccination at day 0, as well as days 30 and 90 after vaccination during the 2009/2010 and 2010/2011 influenza virus seasons. During the 2009/2010 season, vaccination successfully induced antibodies with hemagglutinin inhibition (HAI) activity against both H1N1 and H3N2 vaccine components. For the 2010/2011 season, the A/California/04/2009 (CA/09) H1N1 elicited seroconversion (HAI titer = 1:40) and novel memory B cell (Bmem) responses from most individuals. However, the H3N2 influenza virus component of the vaccine, A/Perth/16/2009 (Perth/09), back-boosted and elicited antibodies with HAI activity and Bmem response to historical H3N2 influenza virus strains. Following stratification of the pre-existing antibody with HAI against the CA/09 H1N1, there was a negative correlation with HAI seroconversion to other vaccine strains. Overall, strong immune responses against CA/09 H1N1 influenza virus negatively influenced the induction of novel humoral responses.
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Affiliation(s)
- Hyesun Jang
- Center for Vaccines and Immunology, University of Georgia, Athens, Georgia, United States of America
- Department of Infectious Diseases, University of Georgia, Athens, Georgia, United States of America
| | - Ted M. Ross
- Center for Vaccines and Immunology, University of Georgia, Athens, Georgia, United States of America
- Department of Infectious Diseases, University of Georgia, Athens, Georgia, United States of America
- * E-mail:
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2
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Casado JL, Haemmerle J, Vizcarra P, Rodriguez-Dominguez M, Velasco T, Velasco H, Centenera E, Romero-Hernandez B, Fernandez-Escribano M, Vallejo A. T-cell response after first dose of BNT162b2 SARS-CoV-2 vaccine among healthcare workers with previous infection or cross-reactive immunity. Clin Transl Immunology 2021; 10:e1341. [PMID: 34522381 PMCID: PMC8426108 DOI: 10.1002/cti2.1341] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/22/2021] [Accepted: 08/21/2021] [Indexed: 12/28/2022] Open
Abstract
Objectives Antibody response to the first dose of BNT162b2 SARS‐CoV‐2 is greater in COVID‐19‐convalescent than in infection‐naïve individuals. However, there are no data about T‐cell response in individuals with pre‐existing cellular immunity. Methods We evaluated T‐cell responses in parallel with SARS‐CoV‐2 antibody level after first dose of BNT162b2 vaccine in 23 infection‐naïve and 27 convalescent healthcare workers (HCWs) previously included in a study about humoral and T‐cell immunity. Results Overall, the antibody response was lower in the infection‐naïve group than in convalescent individuals (18 895 vs 662.7 AU mL−1, P < 0.001), and intermediate but significantly lower in convalescent HCWs with previous negative serology (25 174 vs 1793 AU mL−1; P = 0.015). Indeed, anti‐spike IgG titres after the first dose correlated with baseline anti‐nucleocapsid IgG titres (rho = 0.689; P < 0.001). Pre‐existing T‐cell immunity was observed in 78% of convalescent and 65% of the infection‐naïve HCWs. T‐cell response after the first dose of the vaccine was observed in nearly all the cases with pre‐existing T‐cell immunity, reaching 94% in convalescent HCWs and 93% in those with cross‐reactive T cells. It was lower in the infection‐naïve group (50%; P = 0.087) and in convalescent HCWs with negative serology (56%; P = 0.085). Notably, systemic reactogenicity after vaccination was mainly observed in those with pre‐existing T‐cell immunity (P = 0.051). Conclusion Here, we report that the first dose of BTN162b2 elicits a similar S‐specific T‐cell response in cases of either past infection or cross‐reactive T cells, but lower in the rest of infection‐naïve individuals and in convalescent HCWs who have lost detectable specific antibodies during follow‐up.
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Affiliation(s)
- Jose L Casado
- Department of Infectious Diseases Hospital Universitario Ramón y Cajal Madrid Spain
| | - Johannes Haemmerle
- Department of Prevention of Occupational Risks Hospital Universitario Ramón y Cajal Madrid Spain
| | - Pilar Vizcarra
- Department of Infectious Diseases Hospital Universitario Ramón y Cajal Madrid Spain
| | - Mario Rodriguez-Dominguez
- Department of Microbiology IRYCIS, Instituto Ramón y Cajal de Investigaciones Sanitarias CIBERESP Hospital Universitario Ramón y Cajal Madrid Spain
| | - Tamara Velasco
- Department of Infectious Diseases Hospital Universitario Ramón y Cajal Madrid Spain
| | - Hector Velasco
- Laboratory of Immunovirology IRYCIS, Instituto Ramón y Cajal de Investigaciones Sanitarias CIBERESP Hospital Universitario Ramón y Cajal Madrid Spain
| | - Elena Centenera
- Department of Infectious Diseases Hospital Universitario Ramón y Cajal Madrid Spain
| | - Beatriz Romero-Hernandez
- Department of Microbiology IRYCIS, Instituto Ramón y Cajal de Investigaciones Sanitarias CIBERESP Hospital Universitario Ramón y Cajal Madrid Spain
| | | | - Alejandro Vallejo
- Department of Infectious Diseases Hospital Universitario Ramón y Cajal Madrid Spain.,Laboratory of Immunovirology IRYCIS, Instituto Ramón y Cajal de Investigaciones Sanitarias CIBERESP Hospital Universitario Ramón y Cajal Madrid Spain
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Wen S, Wu Z, Zhong S, Li M, Shu Y. Factors influencing the immunogenicity of influenza vaccines. Hum Vaccin Immunother 2021; 17:2706-2718. [PMID: 33705263 DOI: 10.1080/21645515.2021.1875761] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Annual vaccination is the best prevention of influenza. However, the immunogenicity of influenza vaccines varies among different populations. It is important to fully identify the factors that may affect the immunogenicity of the vaccines to provide best protection for vaccine recipients. This paper reviews the factors that may influence the immunogenicity of influenza vaccines from the aspects of vaccine factors, adjuvants, individual factors, repeated vaccination, and genetic factors. The confirmed or hypothesized molecular mechanisms of these factors have also been briefly summarized.
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Affiliation(s)
- Simin Wen
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangdong, China
| | - Zhengyu Wu
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangdong, China
| | - Shuyi Zhong
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangdong, China
| | - Mao Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangdong, China
| | - Yuelong Shu
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangdong, China.,National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Prevention and Control, Beijing, China
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Anjorin AA, Adepoju BA. Serologic evidence of seasonal influenza A and B in HIV patients on combined antiretroviral therapy in Lagos, Nigeria. Afr J Lab Med 2021; 9:1048. [PMID: 33392051 PMCID: PMC7756740 DOI: 10.4102/ajlm.v9i1.1048] [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: 05/22/2019] [Accepted: 10/01/2020] [Indexed: 11/21/2022] Open
Abstract
Background Influenza and HIV are endemic in Nigeria but there is no epidemiological data on the co-infection of influenza A and B among HIV patients. Objective We investigated seasonal influenza A and B, and co-infection among HIV patients on combined antiretroviral therapy (cART) in Lagos, Nigeria. Methods In a prospective cross-sectional study, clear sera collected from 174 HIV-positive patients between August and September 2018 were analysed for immunoglobulin M-specific antibodies to seasonal influenza A subtypes H1N1 and H3N2, and influenza B by enzyme immunoassay. Results A total of 39.7% (69/174) of HIV patients were seropositive for influenza A or B viruses with 84.1% (58/69) being positive for influenza A, 13.04% (9/69) seropositive for both influenza A and B, and only 2.9% (2/69) positive for influenza B mono-infection. Median age was 44 (mean 45, mode 40, range 18–74) years. The 41–50 years age group had the highest seroprevalence (39.1%; 27/69). Seropositivity was highest among women (65.2%; 45/69). A total of 88.4% (61/69) of HIV patients seropositive for influenza A or B were on fixed dose cART, while 73.9% (51/69) were virologically suppressed. Furthermore, 27.5% (19/69) were immunocompromised, of which 21.1% (4/19) were severely immunosuppressed (cluster of differentiation 4 < 200 cells/mm>3). Conclusion Influenza A and B was prevalent among HIV patients on cART, which may predispose them to life-threatening complications. We recommend strong advocacy on the need to reduce the risk of exposure to influenza and for the provision of an influenza vaccine in Nigeria.
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Affiliation(s)
- AbdulAzeez A Anjorin
- Department of Microbiology, Faculty of Science, Lagos State University, Ojo, Nigeria
| | - Barakat A Adepoju
- Department of Microbiology, Faculty of Science, Lagos State University, Ojo, Nigeria
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Rodriguez S, Roussel M, Tarte K, Amé-Thomas P. Impact of Chronic Viral Infection on T-Cell Dependent Humoral Immune Response. Front Immunol 2017; 8:1434. [PMID: 29163507 PMCID: PMC5671495 DOI: 10.3389/fimmu.2017.01434] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/16/2017] [Indexed: 12/15/2022] Open
Abstract
During the last decades, considerable efforts have been done to decipher mechanisms supported by microorganisms or viruses involved in the development, differentiation, and function of immune cells. Pathogens and their associated secretome as well as the continuous inflammation observed in chronic infection are shaping both innate and adaptive immunity. Secondary lymphoid organs are functional structures ensuring the mounting of adaptive immune response against microorganisms and viruses. Inside these organs, germinal centers (GCs) are the specialized sites where mature B-cell differentiation occurs leading to the release of high-affinity immunoglobulin (Ig)-secreting cells. Different steps are critical to complete B-cell differentiation process, including proliferation, somatic hypermutations in Ig variable genes, affinity-based selection, and class switch recombination. All these steps require intense interactions with cognate CD4+ helper T cells belonging to follicular helper lineage. Interestingly, pathogens can disturb this subtle machinery affecting the classical adaptive immune response. In this review, we describe how viruses could act directly on GC B cells, either through B-cell infection or by their contribution to B-cell cancer development and maintenance. In addition, we depict the indirect impact of viruses on B-cell response through infection of GC T cells and stromal cells, leading to immune response modulation.
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Affiliation(s)
- Stéphane Rodriguez
- UMR U1236, INSERM, Université de Rennes 1, Etablissement Français du Sang Bretagne, Equipe labellisée Ligue Contre le Cancer, LabEx IGO, Rennes, France.,Centre Hospitalier Universitaire de Rennes, pôle Biologie, Rennes, France
| | - Mikaël Roussel
- UMR U1236, INSERM, Université de Rennes 1, Etablissement Français du Sang Bretagne, Equipe labellisée Ligue Contre le Cancer, LabEx IGO, Rennes, France.,Centre Hospitalier Universitaire de Rennes, pôle Biologie, Rennes, France
| | - Karin Tarte
- UMR U1236, INSERM, Université de Rennes 1, Etablissement Français du Sang Bretagne, Equipe labellisée Ligue Contre le Cancer, LabEx IGO, Rennes, France.,Centre Hospitalier Universitaire de Rennes, pôle Biologie, Rennes, France
| | - Patricia Amé-Thomas
- UMR U1236, INSERM, Université de Rennes 1, Etablissement Français du Sang Bretagne, Equipe labellisée Ligue Contre le Cancer, LabEx IGO, Rennes, France.,Centre Hospitalier Universitaire de Rennes, pôle Biologie, Rennes, France
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Antibody Responses with Fc-Mediated Functions after Vaccination of HIV-Infected Subjects with Trivalent Influenza Vaccine. J Virol 2016; 90:5724-5734. [PMID: 27053553 DOI: 10.1128/jvi.00285-16] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 03/30/2016] [Indexed: 01/24/2023] Open
Abstract
UNLABELLED This study seeks to assess the ability of seasonal trivalent inactivated influenza vaccine (TIV) to induce nonneutralizing antibodies (Abs) with Fc-mediated functions in HIV-uninfected and HIV-infected subjects. Functional influenza-specific Ab responses were studied in 30 HIV-negative and 27 HIV-positive subjects immunized against seasonal influenza. All 57 subjects received the 2015 TIV. Fc-mediated antihemagglutinin (anti-HA) Ab activity was measured in plasma before and 4 weeks after vaccination using Fc-receptor-binding assays, NK cell activation assays, and phagocytosis assays. At baseline, the HIV-positive group had detectable but reduced functional Ab responses to both vaccine and nonvaccine influenza antigens. TIV enhanced Fc-mediated Ab responses in both HIV-positive and HIV-negative groups. A larger rise was generally observed in the HIV-positive group, such that there was no difference in functional Ab responses between the two groups after vaccination. The 2015 TIV enhanced functional influenza-specific Ab responses in both HIV-negative and HIV-positive subjects to a range of influenza HA proteins. The increase in functional Ab responses in the HIV-positive group supports recommendations to immunize this at-risk group. IMPORTANCE Infection with HIV is associated with increasing disease severity following influenza infections, and annual influenza vaccinations are recommended for this target group. However, HIV-infected individuals respond relatively poorly to vaccination compared to healthy individuals, particularly if immunodeficient. There is therefore a need to increase our understanding of immunity to influenza in the context of underlying HIV infection. While antibodies can mediate direct virus neutralization, interactions with cellular Fc receptors may be important for anti-influenza immunity in vivo by facilitating antibody-dependent cellular cytotoxicity (ADCC) and/or antibody-dependent phagocytosis (ADP). The ability of seasonal influenza vaccines to induce antibody responses with potent Fc-mediated antiviral activity is currently unclear. Probing the ADCC and ADP responses to influenza vaccination has provided important new information in the quest to improve immunity to influenza.
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Wheatley AK, Kristensen AB, Lay WN, Kent SJ. HIV-dependent depletion of influenza-specific memory B cells impacts B cell responsiveness to seasonal influenza immunisation. Sci Rep 2016; 6:26478. [PMID: 27220898 PMCID: PMC4879526 DOI: 10.1038/srep26478] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 05/04/2016] [Indexed: 01/09/2023] Open
Abstract
Infection with HIV drives significant alterations in B cell phenotype and function that can markedly influence antibody responses to immunisation. Anti-retroviral therapy (ART) can partially reverse many aspects of B cell dysregulation, however complete normalisation of vaccine responsiveness is not always observed. Here we examine the effects of underlying HIV infection upon humoral immunity to seasonal influenza vaccines. Serological and memory B cell responses were assessed in 26 HIV+ subjects receiving ART and 30 healthy controls immunised with the 2015 Southern Hemisphere trivalent inactivated influenza vaccine (IIV3). Frequencies and phenotypes of influenza hemagglutinin (HA)-specific B cells were assessed by flow cytometry using recombinant HA probes. Serum antibody was measured using hemagglutination inhibition assays. Serological responses to IIV3 were comparable between HIV+ and HIV− subjects. Likewise, the activation and expansion of memory B cell populations specific for vaccine-component influenza strains was observed in both cohorts, however peak frequencies were diminished in HIV+ subjects compared to uninfected controls. Lower circulating frequencies of memory B cells recognising vaccine-component and historical influenza strains were observed in HIV+ subjects at baseline, that were generally restored to levels comparable with HIV− controls post-vaccination. HIV infection is therefore associated with depletion of selected HA-specific memory B cell pools.
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Affiliation(s)
- Adam K Wheatley
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Melbourne, Parkville, Australia
| | - Anne B Kristensen
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia
| | - William N Lay
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia
| | - Stephen J Kent
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Melbourne, Parkville, Australia.,Melbourne Sexual Health Centre and Department of Infectious Diseases, Alfred Health, Central Clinical School, Monash University, Melbourne, Australia
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8
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Luo Z, Ma L, Zhang L, Martin L, Wan Z, Warth S, Kilby A, Gao Y, Bhargava P, Li Z, Wu H, Meissner EG, Li Z, Kilby JM, Liao G, Jiang W. Key differences in B cell activation patterns and immune correlates among treated HIV-infected patients versus healthy controls following influenza vaccination. Vaccine 2015; 34:1945-55. [PMID: 26721328 DOI: 10.1016/j.vaccine.2015.12.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND There is increasing recognition of the role of B cell dysfunction in HIV pathogenesis, but little is known about how these perturbations may influence responses to vaccinations. METHODS Healthy controls (n=16) and antiretroviral therapy (ART)-treated aviremic HIV-infected subjects (n=26) receiving standard-of-care annual influenza vaccinations were enrolled in the present study. Total bacterial 16S rDNA levels were assessed by quantitative polymerase chain reactions in plasma. Serologic responses were characterized by ELISA, hemagglutination inhibition assay (HI), and microneutralization, and cell-mediated responses were assessed by ELISPOT (antigen-specific IgG+ antibody-secreting cells (ASCs)) and flow cytometry at pre-vaccination (D0), day 7-10 (D7) and day 14-21 (D14) post-vaccination. RESULTS Decreased peripheral CD4+ T cell absolute counts and increased frequencies of cycling and apoptotic B cells were found at baseline in HIV-infected subjects relative to healthy controls. In healthy controls, post-vaccination neutralizing activities were related to the frequencies of vaccine-mediated apoptosis and cycling of B cells, but not to CD4+ T cell counts. In patients, both baseline and post-vaccination neutralizing activities were directly correlated with plasma level of bacterial 16S rDNA. However, overall vaccine responses including antibody titers and fold changes were comparable or greater in HIV-infected subjects relative to healthy controls. CONCLUSION B cell function correlates with measures of recall humoral immunity in response to seasonal influenza vaccination in healthy controls but not in ART-treated patients.
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Affiliation(s)
- Zhenwu Luo
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Lei Ma
- Chief of No. 5 Biologicals Department, Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kuming 650118, China
| | - Lumin Zhang
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Lisa Martin
- Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Zhuang Wan
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Stephanie Warth
- Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Andrew Kilby
- Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Yong Gao
- Division of Infectious Diseases, Department of Medicine, Case Western Reserve University, Cleveland, OH 41006, USA
| | - Pallavi Bhargava
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Zhen Li
- Beijing You'an Hospital, Capital Medical University, No. 8 Xitoutiao, You'an men wai, Fengtai District, Beijing 100069, China
| | - Hao Wu
- Beijing You'an Hospital, Capital Medical University, No. 8 Xitoutiao, You'an men wai, Fengtai District, Beijing 100069, China
| | - Eric G Meissner
- Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Zihai Li
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - J Michael Kilby
- Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Guoyang Liao
- Chief of No. 5 Biologicals Department, Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kuming 650118, China.
| | - Wei Jiang
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC 29425, USA; Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
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Chawansuntati K, Chotirosniramit N, Sugandhavesa P, Aurpibul L, Thetket S, Kosashunhanan N, Supindham T, Kaewthip O, Sroysuwan P, Sirisanthana T, Suparatpinyo K, Wipasa J. Low expression of activation marker CD69 and chemokine receptors CCR5 and CXCR3 on memory T cells after 2009 H1N1 influenza A antigen stimulation in vitro following H1N1 vaccination of HIV-infected individuals. Hum Vaccin Immunother 2015; 11:2253-65. [PMID: 26091502 DOI: 10.1080/21645515.2015.1051275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Unlike well-studied antibody responses to pandemic 2009 H1N1 influenza A virus vaccines in human immunodeficiency virus-infected (HIV+) individuals, less well understood are cell-mediated immune (CMI) responses to this antigen in this susceptible population. We investigated such influenza-specific CMI responses in 61 HIV+ individuals and in 20 HIV-negative (HIV-) healthy controls. Each was vaccinated with a single licensed dose of inactivated, split-virion vaccine comprised of the influenza A/California/7/2009 (H1N1) virus-like strain. Cells collected just prior to vaccination and at 1 and 3 months afterwards were stimulated in vitro with dialyzed vaccine antigen and assayed by flow cytometry for cytokines TNF-α, IFN-γ, IL-2, and IL-10, for degranulation marker CD107a, as well as phenotypes of memory T-cell subpopulations. Comparable increases of cytokine-producing and CD107a-expressing T cells were observed in both HIV+ subjects and healthy HIV-controls. However, by 3 months post-vaccination, in vitro antigen stimulation of peripheral blood mononuclear cells induced greater expansion in controls of both CD4 and CD8 central memory and effector memory T cells, as well as higher expression of the activation marker CD69 and chemokine receptors CCR5 and CXCR3 than in HIV+ subjects. We concluded CD4+ and CD8+ memory T cells produce cytokines at comparable levels in both groups, whereas the expression after in vitro stimulation of molecules critical for cell migration to infection sites are lower in the HIV+ than in comparable controls. Further immunization strategies against influenza are needed to improve the CMI responses in people living with HIV.
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Cellular and humoral cross-immunity against two H3N2v influenza strains in presumably unexposed healthy and HIV-infected subjects. PLoS One 2014; 9:e105651. [PMID: 25162670 PMCID: PMC4146513 DOI: 10.1371/journal.pone.0105651] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 07/22/2014] [Indexed: 11/19/2022] Open
Abstract
Human cases of infection due to a novel swine-origin variant of influenza A virus subtype H3N2 (H3N2v) have recently been identified in the United States. Pre-existing humoral and cellular immunity has been recognized as one of the key factors in limiting the infection burden of an emerging influenza virus strain, contributing to restrict its circulation and to mitigate clinical presentation. Aim of this study was to assess humoral and cell-mediated cross immune responses to H3N2v in immuno-competent (healthy donors, n = 45) and immuno-compromised hosts (HIV-infected subjects, n = 46) never exposed to H3N2v influenza strain. Humoral response against i) H3N2v (A/H3N2/Ind/08/11), ii) animal vaccine H3N2 strain (A/H3N2/Min/11/10), and iii) pandemic H1N1 virus (A/H1N1/Cal/07/09) was analysed by hemagglutination inhibition assay; cell-mediated response against the same influenza strains was analysed by ELISpot assay. A large proportion of healthy and HIV subjects displayed cross-reacting humoral and cellular immune responses against two H3N2v strains, suggesting the presence of B- and T-cell clones able to recognize epitopes from emerging viral strains in both groups. Specifically, humoral response was lower in HIV subjects than in HD, and a specific age-related pattern of antibody response against different influenza strains was observed both in HD and in HIV. Cellular immune response was similar between HD and HIV groups and no relationship with age was reported. Finally, no correlation between humoral and cellular immune response was observed. Overall, a high prevalence of HD and HIV patients showing cross reactive immunity against two H3N2v strains was observed, with a slightly lower proportion in HIV persons. Other studies focused on HIV subjects at different stages of diseases are needed in order to define how cross immunity can be affected by advanced immunosuppression.
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Fabbiani M, Sidella L, Corbi M, Martucci R, Sali M, Colafigli M, Cauda R, Delogu G, Sgambato A, Di Giambenedetto S. HIV-infected patients show impaired cellular immune response to influenza vaccination compared to healthy subjects. Vaccine 2013; 31:2914-8. [PMID: 23623859 DOI: 10.1016/j.vaccine.2013.04.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 02/25/2013] [Accepted: 04/11/2013] [Indexed: 12/20/2022]
Abstract
Detailed data on cellular immune response to influenza vaccination in HIV-infected patients are lacking. We analyzed cellular (IL-2, IL-4, IL-5, IL-10, IL-12, IL-13, IFN-γ, TNF-α, GM-CSF) and humoral (IgG and IgM) immune response in 81 HIV-infected and 30 HIV-negative subjects, before (T0) and 4 weeks (T1) after receiving a single dose of trivalent MF59-adjuvanted influenza vaccine. No difference in humoral response (IgG or IgM) was demonstrated between the two groups. While an increase in most cytokines from T0 to T1 was observed in HIV-uninfected subjects, cytokines production did not significantly increased in HIV-infected patients. Exploring Th1 response, higher CD8 cells count was significantly associated with lower post-vaccination IFNγ levels, while a higher CD4 cells count was associated with a greater response. Exploring Th2 response, higher HIV viral load was significantly associated with reduced post-vaccination IL-10 levels. In conclusion, in HIV-infected patients influenza vaccination could have good efficacy in sustaining humoral response but cellular response appeared impaired.
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Affiliation(s)
- Massimiliano Fabbiani
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Largo Agostino Gemelli 8, 00168 Rome, Italy.
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