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Sanford TC, Tweten RK, Abrahamsen HL. Bacterial cholesterol-dependent cytolysins and their interaction with the human immune response. Curr Opin Infect Dis 2024; 37:164-169. [PMID: 38527455 PMCID: PMC11042984 DOI: 10.1097/qco.0000000000001010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
PURPOSE OF REVIEW Many cholesterol-dependent cytolysin (CDC)-producing pathogens pose a significant threat to human health. Herein, we review the pore-dependent and -independent properties CDCs possess to assist pathogens in evading the host immune response. RECENT FINDINGS Within the last 5 years, exciting new research suggests CDCs can act to inhibit important immune functions, disrupt critical cell signaling pathways, and have tissue-specific effects. Additionally, recent studies have identified a key region of CDCs that generates robust immunity, providing resources for the development of CDC-based vaccines. SUMMARY This review provides new information on how CDCs alter host immune responses to aid bacteria in pathogenesis. These studies can assist in the design of more efficient vaccines and therapeutics against CDCs that will enhance the immune response to CDC-producing pathogens while mitigating the dampening effects CDCs have on the host immune response.
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Affiliation(s)
- Tristan C. Sanford
- University of Oklahoma Health Sciences Center, Department of Microbiology and Immunology, Oklahoma City, OK 73104
| | - Rodney K. Tweten
- University of Oklahoma Health Sciences Center, Department of Microbiology and Immunology, Oklahoma City, OK 73104
| | - Hunter L. Abrahamsen
- University of Oklahoma Health Sciences Center, Department of Microbiology and Immunology, Oklahoma City, OK 73104
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2
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Ciacchi L, van de Garde MDB, Ladell K, Farenc C, Poelen MCM, Miners KL, Llerena C, Reid HH, Petersen J, Price DA, Rossjohn J, van Els CACM. CD4 + T cell-mediated recognition of a conserved cholesterol-dependent cytolysin epitope generates broad antibacterial immunity. Immunity 2023; 56:1082-1097.e6. [PMID: 37100059 DOI: 10.1016/j.immuni.2023.03.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 12/31/2022] [Accepted: 03/30/2023] [Indexed: 04/28/2023]
Abstract
CD4+ T cell-mediated immunity against Streptococcus pneumoniae (pneumococcus) can protect against recurrent bacterial colonization and invasive pneumococcal diseases (IPDs). Although such immune responses are common, the pertinent antigens have remained elusive. We identified an immunodominant CD4+ T cell epitope derived from pneumolysin (Ply), a member of the bacterial cholesterol-dependent cytolysins (CDCs). This epitope was broadly immunogenic as a consequence of presentation by the pervasive human leukocyte antigen (HLA) allotypes DPB1∗02 and DPB1∗04 and recognition via architecturally diverse T cell receptors (TCRs). Moreover, the immunogenicity of Ply427-444 was underpinned by core residues in the conserved undecapeptide region (ECTGLAWEWWR), enabling cross-recognition of heterologous bacterial pathogens expressing CDCs. Molecular studies further showed that HLA-DP4-Ply427-441 was engaged similarly by private and public TCRs. Collectively, these findings reveal the mechanistic determinants of near-global immune focusing on a trans-phyla bacterial epitope, which could inform ancillary strategies to combat various life-threatening infectious diseases, including IPDs.
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Affiliation(s)
- Lisa Ciacchi
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Martijn D B van de Garde
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Utrecht 3721MA, the Netherlands
| | - Kristin Ladell
- Division of Infection and Immunity, Cardiff University School of Medicine, University Hospital of Wales, Cardiff CF14 4XN, UK
| | - Carine Farenc
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Martien C M Poelen
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Utrecht 3721MA, the Netherlands
| | - Kelly L Miners
- Division of Infection and Immunity, Cardiff University School of Medicine, University Hospital of Wales, Cardiff CF14 4XN, UK
| | - Carmen Llerena
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Hugh H Reid
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Jan Petersen
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - David A Price
- Division of Infection and Immunity, Cardiff University School of Medicine, University Hospital of Wales, Cardiff CF14 4XN, UK; Systems Immunity Research Institute, Cardiff University School of Medicine, University Hospital of Wales, Cardiff CF14 4XN, UK.
| | - Jamie Rossjohn
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Division of Infection and Immunity, Cardiff University School of Medicine, University Hospital of Wales, Cardiff CF14 4XN, UK; Systems Immunity Research Institute, Cardiff University School of Medicine, University Hospital of Wales, Cardiff CF14 4XN, UK.
| | - Cécile A C M van Els
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Utrecht 3721MA, the Netherlands; Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht 3584CL, the Netherlands.
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3
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Mahallawi WH, Aljeraisi TM. Infection with SARS-CoV-2 primes immunological memory in human nasal-associated lymphoid tissue. Clin Immunol 2021; 231:108850. [PMID: 34506944 PMCID: PMC8423672 DOI: 10.1016/j.clim.2021.108850] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/24/2021] [Accepted: 09/04/2021] [Indexed: 12/03/2022]
Abstract
Background The coronavirus disease 2019 (COVID-19) pandemic, caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, has resulted in considerable morbidity and mortality in humans. Little is known regarding the development of immunological memory following SARS-CoV-2 infection or whether immunological memory can provide long-lasting protection against reinfection. Urgent need for vaccines is a considerable issue for all governments worldwide. Methods A total of 39 patients were recruited in this study. Tonsillar mononuclear cells (MNCs) were co-cultured in RPMI medium and stimulated with the full-length SARS-CoV-2 spike protein in the presence and absence of a CpG-DNA adjuvant. An enzyme-linked immunosorbent assay (ELISA) was utilised to measure the specific antibody response to the spike protein in the cell culture supernatants. Results The SARS-CoV-2 spike protein primed a potent memory B cell-mediated immune response in nasal-associated lymphoid tissue (NALT) from patients previously infected with the virus. Additionally, spike protein combined with the CpG-DNA adjuvant induced a significantly increased level of specific anti-spike protein IgG antibody compared with the spike protein alone (p < 0.0001, n = 24). We also showed a strong positive correlation between the specific anti-spike protein IgG antibody level in a serum samples and that produced by MNCs derived from the same COVID-19-recovered patients following stimulation (r = 0.76, p = 0.0002, n = 24). Conclusion Individuals with serological evidence of previous SARS-CoV-2 exposure showed a significant anti-spike protein-specific memory humoral immune response to the viral spike protein upon stimulation. Additionally, our results demonstrated the functional response of NALT-derived MNCs to the viral spike protein. CpG-DNA adjuvant combined with spike protein induced significantly stronger humoral immune responses than the spike protein alone. These data indicate that the S protein antigen combined with CpG-DNA adjuvant could be used as a future vaccine candidate.
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Affiliation(s)
- Waleed H Mahallawi
- Medical Laboratory Technology Department, College of Applied Medical Sciences, Taibah University, Madinah, Saudi Arabia.
| | - Talal M Aljeraisi
- Otorhinolaryngology, Head& Neck Surgery Department, Faculty of Medicine, Taibah University, Madinah, Saudi Arabia.
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4
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Huang CC, Chang TH, Lee CY, Wu PW, Chen CL, Lee TJ, Liou ML, Chiu CH. Tissue microbiota in nasopharyngeal adenoid and its association with pneumococcal carriage. Microb Pathog 2021; 157:104999. [PMID: 34044045 DOI: 10.1016/j.micpath.2021.104999] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 05/18/2021] [Accepted: 05/19/2021] [Indexed: 10/21/2022]
Abstract
The microbial colonization in the nasopharynx is a prerequisite for the onset of infectious diseases. For successful infection, pathogens should overcome host defenses as well as compete effectively with the resident microbiota. Hence, elucidating the richness and diversity of the microbiome at the site of pathogen colonization is pivotal. Here, we investigated the adenoidal tissue microbiota collected through adenoidectomy to evaluate the impact of Streptococcus pneumoniae. Prospectively, children with sleep-disordered breathing (SDB) and otitis media with effusion (OME) were enrolled. During adenoidectomy, the nasopharyngeal swab and adenoid tissues were collected to determine the pneumococcal carriage and tissue microbiota, using multiplex PCR and 16S ribosomal RNA (16S rRNA) pyrosequencing. A total of 66 pediatric patients comprising 38 children with SDB and 28 children with OME were enrolled. There was no difference between the bacterial cultures from the surface of the nasopharyngeal adenoid in the SDB and OME groups. Thirty-four samples (17 SDB and 17 OME) underwent 16S rRNA pyrosequencing and fulfilled the criteria for further analysis. The Shannon diversity index for the samples from the SDB patients was found to be higher than that observed for the samples from OME patients, although the difference was not significant (p = 0.095). The Shannon diversity index for the samples negative for the pneumococcal carriage was significantly higher than that for the samples positive for pneumococcal carriage (p = 0.038). Alloprevotella, Staphylococcus, Moraxella, and Neisseriaceae were significantly dominant in the samples positive for the pneumococcal carriage. Dialister was significantly less present in the adenoid tissue positive for the pneumococcal carriage. Streptococcus pneumoniae, one of the most common pathogens of the airway, significantly influences the composition and diversity of the microbiota in the nasopharyngeal adenoid. Thus, bacterial community analysis based on 16S rRNA pyrosequencing allows for better understanding of the relationship between the adenoidal microbial communities.
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Affiliation(s)
- Chien-Chia Huang
- Division of Rhinology, Department of Otolaryngology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Tzu-Hao Chang
- Graduate Institute of Biomedical Informatics, Taipei Medical University, Taipei City, 110, Taiwan; Clinical Big Data Research Center, Taipei Medical University Hospital, Taipei City, 110, Taiwan
| | - Cheng-Yang Lee
- Graduate Institute of Biomedical Informatics, Taipei Medical University, Taipei City, 110, Taiwan
| | - Pei-Wen Wu
- Division of Rhinology, Department of Otolaryngology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital and Chang Gung University, Keelung, Taiwan
| | - Chyi-Liang Chen
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ta-Jen Lee
- Division of Rhinology, Department of Otolaryngology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
| | - Ming-Li Liou
- Department of Medical Laboratory Science and Biotechnology, Yuanpei University, Hsin-Chu City, Taiwan
| | - Cheng-Hsun Chiu
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan.
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Dagan R, Jiang Q, Juergens C, Trammel J, Gruber WC, Scott DA. Carrier-Induced Hyporesponsiveness to Pneumococcal Conjugate Vaccines: Unraveling the Influence of Serotypes, Timing, and Previous Vaccine Dose. Clin Infect Dis 2021; 72:448-454. [PMID: 31995183 PMCID: PMC7850554 DOI: 10.1093/cid/ciaa083] [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: 10/02/2019] [Accepted: 01/27/2020] [Indexed: 02/02/2023] Open
Abstract
Background Pneumococcal conjugate vaccines (PCVs) elicit lower immune response against serotypes carried before or at the time of vaccination (hyporesponsiveness) in infants. The limited studies conducted to date did not permit comprehensive insights regarding this phenomenon. This study, the largest ever conducted with both carriage and serologic endpoints, attempted to add insight on serotype-specific hyporesponsiveness in relation to the number of PCV doses administered before carriage acquisition. Methods In a double-blind randomized clinical trial (n = 1754 infants), 7-valent or 13-valent PCV was administered at ages 2, 4, 6, and 12 months. New acquisition was defined based on nasopharyngeal swabs at ages 2, 4, 6, 7, and 12 months. Serotype-specific immunoglobulin G levels were obtained 1 month after the infant series and 1 month after the toddler dose. Results A lower immune response after the infant series and the toddler dose was consistently observed for carriers of serotypes 6A, 6B, 18C, and 19F at predefined time points, with a similar trend observed in carriers of serotype 23F. In contrast, carriage of serotypes 9V, 14, and 19A did not generally affect immune responses. For some but not all serotypes, hyporesponsiveness was decreased with an increased number of vaccine doses received before acquisition. A complex interrelationship between carriage and immune response was observed between cross-reacting serotypes. Conclusions Carrier-induced hyporesponsiveness to PCVs is common, differs among serotypes, and depends on timing of carriage acquisition and prior number of administered PCV doses. Clinical Trials Registration NCT00508742.
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Affiliation(s)
- Ron Dagan
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Qin Jiang
- Pfizer, Vaccines Research, Pfizer Inc, Collegeville, Pennsylvania, USA
| | | | - James Trammel
- Vaccine Quantitative Modeling Statistics, Pfizer Inc, Collegeville, Pennsylvania, USA
| | - William C Gruber
- Pfizer Vaccines Research, Pfizer Inc, Pearl River, New York, USA
| | - Daniel A Scott
- Pfizer, Vaccines Research, Pfizer Inc, Collegeville, Pennsylvania, USA
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6
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Mahallawi WH, Aljeraisi TM. In vitro cell culture model of human nasal-associated lymphoid tissue (NALT) to evaluate the humoral immune response to SARS-CoV-2 spike proteins. Saudi J Biol Sci 2021; 28:4516-4521. [PMID: 33942008 PMCID: PMC8064899 DOI: 10.1016/j.sjbs.2021.04.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/04/2021] [Accepted: 04/18/2021] [Indexed: 12/15/2022] Open
Abstract
To date, coronavirus disease 2019 (COVID-19) continues to be considered a pandemic worldwide, with a mild to severe disease presentation that is sometimes associated with serious complications that are concerning to global health authorities. Scientists are working hard to understand the pathogenicity of this novel virus, and a great deal of attention and effort has been focused on identifying therapeutics and vaccines to control this pandemic. Methods This study used tonsils removed from twelve patients who underwent an elective tonsillectomy in the ear, nose, and throat (ENT) department at Saudi Germany Hospital, Madinah, Saudi Arabia. Tonsillar mononuclear cells (MNCs) were separated and co-cultured in RPMI complete medium in the presence and absence of viral spike (S) proteins (the full-length S, S1 subunit, and S2 subunit proteins). Enzyme-linked immunosorbent assay (ELISA) was used to measure secreted antibody concentrations following stimulation. Results The in vitro human nasal-associated lymphoid tissue (NALT) cell culture model was successfully used to evaluate the humoral immune response against SARS-CoV-2- S protein. Significant (p < 0.0001, n = 12) levels of specific, anti-S IgG, IgM, and IgA antibody responses were detected in cells culture supernatanat folloeing stimulation with the full-length S protein compared with unstimulated cells. In contrast, S1 and S2 subunit proteins alone failed to induce a mucosal humoral immune response following tonsillar MNC stimulation. Conclusion We demonstrated a successful human NALT in vitro cell culture model that was used to study the mucosal humoral immune response to the SARS-CoV-2 S protein. This model could be advantageous for the in-depth study of cellular immune responses to the S protein and other viral antigens, such as nucleocapsid and matrix antigen. The S protein appears to be the important viral protein that may be able to mimic the natural infection process intranasally and should be studied as a component of a candidate vaccine.
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Affiliation(s)
- Waleed H Mahallawi
- Department of Medical Laboratory Technology, College of Applied Medical Sciences, Taibah University, Madinah 41541, Saudi Arabia
| | - Talal M Aljeraisi
- Otorhinolaryngology, Head& Neck Surgery Department, Faculty of Medicine, Taibah University, Madinah, Saudi Arabia
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7
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Ko E, Jeong S, Jwa MY, Kim AR, Ha YE, Kim SK, Jeong S, Ahn KB, Seo HS, Yun CH, Han SH. Immune Responses to Irradiated Pneumococcal Whole Cell Vaccine. Vaccines (Basel) 2021; 9:vaccines9040405. [PMID: 33921842 PMCID: PMC8073785 DOI: 10.3390/vaccines9040405] [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: 03/19/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 11/16/2022] Open
Abstract
Streptococcus pneumoniae (pneumococcus) can cause respiratory and systemic diseases. Recently, γ-irradiation-inactivated, non-encapsulated, intranasal S. pneumoniae (r-SP) vaccine has been introduced as a novel serotype-independent and cost-effective vaccine. However, the immunogenic mechanism of r-SP is poorly understood. Here, we comparatively investigated the protective immunity and immunogenicity of r-SP to the heat-(h-SP) or formalin-inactivated vaccine (f-SP) without adjuvants. Mice were intranasally immunized with each vaccine three times and then challenged with a lethal dose of S. pneumoniae TIGR4 strain and then subsequently evaluated for their immune responses. Immunization with r-SP elicited modestly higher protection against S. pneumoniae than h-SP or f-SP. Immunization with r-SP enhanced pneumococcal-specific IgA in the nasal wash and IgG in bronchoalveolar lavage fluid. Immunization with r-SP enhanced S. pneumoniae-specific IgG, IgG1, and IgG2b in the serum. r-SP more potently induced the maturation of dendritic cells in the cervical lymph nodes than h-SP or f-SP. Interestingly, populations of follicular helper T cells and IL-4-producing cells were potently increased in cervical lymph nodes of r-SP-immunized mice. Collectively, r-SP could be an effective intranasal, inactivated whole-cell vaccine in that it elicits S. pneumoniae-specific antibody production and follicular helper T cell activation leading to protective immune responses against S. pneumoniae infection.
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Affiliation(s)
- Eunbyeol Ko
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
| | - Soyoung Jeong
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
| | - Min Yong Jwa
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
| | - A Reum Kim
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
| | - Ye-Eun Ha
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
| | - Sun Kyung Kim
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
| | - Sungho Jeong
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
| | - Ki Bum Ahn
- Radiation Research Division, Korea Atomic Energy Research Institute, Jeongeup 56212, Korea; (K.B.A.); (H.S.S.)
| | - Ho Seong Seo
- Radiation Research Division, Korea Atomic Energy Research Institute, Jeongeup 56212, Korea; (K.B.A.); (H.S.S.)
- Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology, Daejeon 34113, Korea
| | - Cheol-Heui Yun
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea;
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology and DRI, School of Dentistry, Seoul National University, Seoul 08826, Korea; (E.K.); (S.J.); (M.Y.J.); (AR.K.); (Y.-E.H.); (S.K.K.); (S.J.)
- Correspondence: ; Tel.: +82-2-880-2310
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Puksuriwong S, Ahmed MS, Sharma R, Krishnan M, Leong S, Lambe T, McNamara PS, Gilbert SC, Zhang Q. Modified Vaccinia Ankara-Vectored Vaccine Expressing Nucleoprotein and Matrix Protein 1 (M1) Activates Mucosal M1-Specific T-Cell Immunity and Tissue-Resident Memory T Cells in Human Nasopharynx-Associated Lymphoid Tissue. J Infect Dis 2021; 222:807-819. [PMID: 31740938 PMCID: PMC7399703 DOI: 10.1093/infdis/jiz593] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 11/14/2019] [Indexed: 02/06/2023] Open
Abstract
Background Increasing evidence supports a critical role of CD8+ T-cell immunity against influenza. Activation of mucosal CD8+ T cells, particularly tissue-resident memory T (TRM) cells recognizing conserved epitopes would mediate rapid and broad protection. Matrix protein 1 (M1) is a well-conserved internal protein. Methods We studied the capacity of modified vaccinia Ankara (MVA)–vectored vaccine expressing nucleoprotein (NP) and M1 (MVA-NP+M1) to activate M1-specific CD8+ T-cell response, including TRM cells, in nasopharynx-associated lymphoid tissue from children and adults. Results After MVA-NP+M1 stimulation, M1 was abundantly expressed in adenotonsillar epithelial cells and B cells. MVA-NP+M1 activated a marked interferon γ–secreting T-cell response to M1 peptides. Using tetramer staining, we showed the vaccine activated a marked increase in M158–66 peptide-specific CD8+ T cells in tonsillar mononuclear cells of HLA-matched individuals. We also demonstrated MVA-NP+M1 activated a substantial increase in TRM cells exhibiting effector memory T-cell phenotype. On recall antigen recognition, M1-specific T cells rapidly undergo cytotoxic degranulation, release granzyme B and proinflammatory cytokines, leading to target cell killing. Conclusions MVA-NP+M1 elicits a substantial M1-specific T-cell response, including TRM cells, in nasopharynx-associated lymphoid tissue, demonstrating its strong capacity to expand memory T-cell pool exhibiting effector memory T-cell phenotype, therefore offering great potential for rapid and broad protection against influenza reinfection.
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Affiliation(s)
- Suttida Puksuriwong
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Muhammad S Ahmed
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Ravi Sharma
- ENT Departments, Alder Hey Children's Hospital, Liverpool, United Kingdom
| | - Madhan Krishnan
- ENT Departments, Alder Hey Children's Hospital, Liverpool, United Kingdom
| | - Sam Leong
- ENT Departments, Aintree University Hospital, Liverpool, United Kingdom
| | - Teresa Lambe
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Paul S McNamara
- Institute of Child Health, Alder Hey Children's Hospital, Liverpool, United Kingdom
| | - Sarah C Gilbert
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Qibo Zhang
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
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Lagousi T, Basdeki P, De Jonge MI, Spoulou V. Understanding host immune responses to pneumococcal proteins in the upper respiratory tract to develop serotype-independent pneumococcal vaccines. Expert Rev Vaccines 2020; 19:959-972. [PMID: 33107359 DOI: 10.1080/14760584.2020.1843433] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Introduction: Nasopharyngeal colonization is a precondition for mucosal and invasive pneumococcal disease. Prevention of colonization may reduce pneumococcal transmission and disease incidence. Therefore, several protein-based pneumococcal vaccines are currently under investigation. Areas covered: We aimed to better understand the host immune responses to pneumococcal proteins in the upper respiratory tract (URT) that could facilitate the development of serotype-independent pneumococcal vaccines. English peer-reviewed papers reporting immunological mechanisms involved in host immune response to pneumococcal proteins in the URT were retrieved through a PubMed search using the terms 'pneumococcal proteins,' 'nasopharyngeal colonization' and/or 'cellular/humoral host immune response.' Expert opinion: Although pneumococcal protein antigens induce humoral immune responses, as well as IL-17A-mediated immunity, none of them, when used as single antigen, is sufficient to control and broadly protect against pneumococcal colonization. Novel vaccines should contain multiple conserved protein antigens to activate both arms of the immune system and evoke protection against the whole spectrum of pneumococcal variants by reducing, rather than eradicating, pneumococcal carriage. The highest efficacy would likely be achieved when the vaccine is intranasally applied, inducing mucosal immunity and enhancing the first line of defense by restricting pneumococcal density in the URT, which in turn will lead to reduced transmission and protection against disease.
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Affiliation(s)
- Theano Lagousi
- First Department of Paediatrics, "Aghia Sophia" Children's Hospital, Immunobiology Research Laboratory and Infectious Diseases Department "MAKKA", Athens Medical School , Athens, Greece
| | - Paraskevi Basdeki
- First Department of Paediatrics, "Aghia Sophia" Children's Hospital, Immunobiology Research Laboratory and Infectious Diseases Department "MAKKA", Athens Medical School , Athens, Greece
| | - Marien I De Jonge
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Center for Infectious Diseases, Radboud Institute for Molecular Life Sciences , Nijmegen, The Netherlands
| | - Vana Spoulou
- First Department of Paediatrics, "Aghia Sophia" Children's Hospital, Immunobiology Research Laboratory and Infectious Diseases Department "MAKKA", Athens Medical School , Athens, Greece
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10
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Morris MC, Chapman TJ, Pichichero ME, Broderick G. Immune Network Modeling Predicts Specific Nasopharyngeal and Peripheral Immune Dysregulation in Otitis-Prone Children. Front Immunol 2020; 11:1168. [PMID: 32595639 PMCID: PMC7301607 DOI: 10.3389/fimmu.2020.01168] [Citation(s) in RCA: 2] [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: 11/04/2019] [Accepted: 05/12/2020] [Indexed: 11/18/2022] Open
Abstract
Acute otitis media (AOM) pathogenesis involves nasopharyngeal colonization by potential otopathogens and a viral co-infection. Stringently-defined otitis prone (sOP) children show characteristic patterns of immune dysfunction. We hypothesized that otitis proneness is largely a result of altered signaling between immune components that are otherwise competent, resulting in increased susceptibility to infection by bacterial otopathogens. To test this, we constructed a regulatory immune network model linking immune cells and signaling elements known to be involved in AOM and/or dysregulated in sOP children. The alignment of immune response mechanisms with data from in vivo and in vitro experimental observations produced 82 putative immune network models, each describing variants of immune regulatory networks consistent with available observations. Analysis of these models suggested that new measurements of serum levels of IL-4 and CXCL8 could refine competing models and resulted in the elimination of 38 of the models. Further analysis of the remaining 44 models suggested specific deviations in the predicted regulation of nasopharyngeal and peripheral immunity during response to AOM. Specifically, immune responses active in sOP children during AOM were characterized by early and constitutive activation of pro-inflammatory signaling in the nasopharynx and a Th2- and Treg-dominated profile in the periphery. We conclude that sOP children have altered regulation of key immune mediators during both health and pathogenesis. This altered regulation may be amenable to therapeutic intervention.
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Affiliation(s)
- Matthew C. Morris
- Center for Clinical Systems Biology, Research Institute, Rochester General Hospital, Rochester, NY, United States
| | - Timothy J. Chapman
- Center for Infectious Diseases and Immunology, Research Institute, Rochester General Hospital, Rochester, NY, United States
| | - Michael E. Pichichero
- Center for Infectious Diseases and Immunology, Research Institute, Rochester General Hospital, Rochester, NY, United States
| | - Gordon Broderick
- Center for Clinical Systems Biology, Research Institute, Rochester General Hospital, Rochester, NY, United States
- Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, NY, United States
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11
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Ascough S, Vlachantoni I, Kalyan M, Haijema BJ, Wallin-Weber S, Dijkstra-Tiekstra M, Ahmed MS, van Roosmalen M, Grimaldi R, Zhang Q, Leenhouts K, Openshaw PJ, Chiu C. Local and Systemic Immunity against Respiratory Syncytial Virus Induced by a Novel Intranasal Vaccine. A Randomized, Double-Blind, Placebo-controlled Clinical Trial. Am J Respir Crit Care Med 2020; 200:481-492. [PMID: 30753101 DOI: 10.1164/rccm.201810-1921oc] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Rationale: Needle-free intranasal vaccines offer major potential advantages, especially against pathogens entering via mucosal surfaces. As yet, there is no effective vaccine against respiratory syncytial virus (RSV), a ubiquitous pathogen of global importance that preferentially infects respiratory epithelial cells; new strategies are urgently required.Objectives: Here, we report the safety and immunogenicity of a novel mucosal RSV F protein vaccine linked to an immunostimulatory bacterium-like particle (BLP).Methods: In this phase I, randomized, double-blind, placebo-controlled trial, 48 healthy volunteers, aged 18-49 years, were randomly assigned to receive placebo or SynGEM (low or high dose) intranasally by prime-boost administration. The primary outcome was safety and tolerability, with secondary objectives assessing virus-specific immunogenicity.Measurements and Main Results: There were no significant differences in adverse events between placebo and vaccinated groups. SynGEM induced systemic plasmablast responses and significant, durable increases in RSV-specific serum antibody in healthy, seropositive adults. Volunteers given low-dose SynGEM (140 μg F, 2 mg BLP) required a boost at Day 28 to achieve plateau responses with a maximum fold change of 2.4, whereas high-dose recipients (350 μg F, 5 mg BLP) achieved plateau responses with a fold change of 1.5 after first vaccination that remained elevated up to 180 days after vaccination, irrespective of further boosting. Palivizumab-like antibodies were consistently induced, but F protein site ∅-specific antibodies were not detected, and virus-specific nasal IgA responses were heterogeneous, with the strongest responses in individuals with lower pre-existing antibody levels.Conclusions: SynGEM is thus the first nonreplicating intranasal RSV subunit vaccine to induce persistent antibody responses in human volunteers.Clinical trials registered with www.clinicaltrials.gov (NCT02958540).
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Affiliation(s)
- Stephanie Ascough
- 1Section of Infectious Diseases and Immunity, Department of Medicine, and.,2Section of Respiratory Infections, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Iris Vlachantoni
- 2Section of Respiratory Infections, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Mohini Kalyan
- 1Section of Infectious Diseases and Immunity, Department of Medicine, and.,2Section of Respiratory Infections, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Bert-Jan Haijema
- 3Mucosis B.V., represented by trustee Mr. Holtz, LLM, Bout Advocaten, Groningen, and Virtuvax B.V., Groningen, the Netherlands; and
| | - Sanna Wallin-Weber
- 3Mucosis B.V., represented by trustee Mr. Holtz, LLM, Bout Advocaten, Groningen, and Virtuvax B.V., Groningen, the Netherlands; and
| | - Margriet Dijkstra-Tiekstra
- 3Mucosis B.V., represented by trustee Mr. Holtz, LLM, Bout Advocaten, Groningen, and Virtuvax B.V., Groningen, the Netherlands; and
| | - Muhammad S Ahmed
- 4Department of Clinical Infection, Microbiology, and Immunology, University of Liverpool, Liverpool, United Kingdom
| | - Maarten van Roosmalen
- 3Mucosis B.V., represented by trustee Mr. Holtz, LLM, Bout Advocaten, Groningen, and Virtuvax B.V., Groningen, the Netherlands; and
| | - Roberto Grimaldi
- 3Mucosis B.V., represented by trustee Mr. Holtz, LLM, Bout Advocaten, Groningen, and Virtuvax B.V., Groningen, the Netherlands; and
| | - Qibo Zhang
- 4Department of Clinical Infection, Microbiology, and Immunology, University of Liverpool, Liverpool, United Kingdom
| | - Kees Leenhouts
- 3Mucosis B.V., represented by trustee Mr. Holtz, LLM, Bout Advocaten, Groningen, and Virtuvax B.V., Groningen, the Netherlands; and
| | - Peter J Openshaw
- 2Section of Respiratory Infections, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Christopher Chiu
- 1Section of Infectious Diseases and Immunity, Department of Medicine, and
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12
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Differential IL-17A response to S. pneumoniae in adenoid tissue of children with sleep disordered breathing and otitis media with effusion. Sci Rep 2019; 9:19839. [PMID: 31882693 PMCID: PMC6934741 DOI: 10.1038/s41598-019-56415-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/18/2019] [Indexed: 12/25/2022] Open
Abstract
Streptococcus pneumonia, one of the major colonizers in nasopharyngeal adenoids, has been the predominant pathogen causing acute otitis media (AOM) in children. Recent evidence suggests an association between IL-17A-mediated immune response and the clearance of pneumococcal colonization in nasopharyngeal adenoids. Here, we evaluated the expressions of IL-17A and associated genes in hypertrophic adenoid tissues of children with sleep-disordered breathing (SDB) and otitis media with effusion (OME) and their association with pneumococcal carriage. Sixty-six pediatric patients with adenoid hypertrophy were enrolled. During adenoidectomy, nasopharyngeal swab and adenoid tissues were used to determine pneumococcal carriage and IL-17A expression. Our results revealed significantly higher levels of IL-17A and IL-17A:IL-10 mRNA in the SDB patients positive for nasopharyngeal pneumococcal carriage than those negative. However, these differences were not significant in the OME group. These results suggested, in OME patients, prolonged or chronic pneumococcal carriage may occur because of insufficient IL-17A-mediated mucosal clearance, and could further lead to AOM and OME development.
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13
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Domain 4 of pneumolysin from Streptococcus pneumoniae is a multifunctional domain contributing TLR4 activating and hemolytic activity. Biochem Biophys Res Commun 2019; 517:596-602. [PMID: 31395343 DOI: 10.1016/j.bbrc.2019.07.063] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 07/18/2019] [Indexed: 11/21/2022]
Abstract
The pneumolysin (Ply) protein of Streptococcus pneumoniae is composed of four domains and possesses several different but related activities. In this study, recombinant Ply and two truncated forms, Ply domain 1-3 and Ply domain 4 (rPly4), were expressed and characterized regarding their participation in apoptosis, the stimulation of cytokine production, hemolytic activity and virulence. rPly4 activated murine bone marrow-derived dendritic cells in a Toll-like receptor (TLR) 4-dependent manner. The rPly4 alone was able to produce hemolytic activity at high concertation and penetrate the lipid bilayer. We further demonstrated that domain 4 of Ply involved in the virulence of the bacteria in mouse model. In the absence of apoptotic activity, the virulence level caused by rPly4 was similar to that of full length Ply. Our data suggested that domain 4 of Ply alone with TLR4 agonist and hemolytic activity may play roles in virulence of Streptococcus pneumoniae.
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14
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Prediction and Validation of Immunogenic Domains of Pneumococcal Proteins Recognized by Human CD4 + T Cells. Infect Immun 2019; 87:IAI.00098-19. [PMID: 30910792 PMCID: PMC6529658 DOI: 10.1128/iai.00098-19] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 02/28/2019] [Indexed: 12/24/2022] Open
Abstract
CD4+ T-cell mechanisms are implied in protection against pneumococcal colonization; however, their target antigens and function are not well defined. In contrast to high-throughput protein arrays for serology, basic antigen tools for CD4+ T-cell studies are lacking. CD4+ T-cell mechanisms are implied in protection against pneumococcal colonization; however, their target antigens and function are not well defined. In contrast to high-throughput protein arrays for serology, basic antigen tools for CD4+ T-cell studies are lacking. Here, we evaluate the potential of a bioinformatics tool for in silico prediction of immunogenicity as a method to reveal domains of pneumococcal proteins targeted by human CD4+ T cells. For 100 pneumococcal proteins, CD4+ T-cell immunogenicity was predicted based on HLA-DRB1 binding motifs. For 20 potentially CD4+ T-cell immunogenic proteins, epitope regions were verified by testing synthetic peptides in T-cell assays using peripheral blood mononuclear cells from healthy adults. Peptide pools of 19 out of 20 proteins evoked T-cell responses. The most frequent responses (detectable in ≥20% of donors tested) were found to SP_0117 (PspA), SP_0468 (putative sortase), SP_0546 (BlpZ), SP_1650 (PsaA), SP_1923 (Ply), SP_2048 (conserved hypothetical protein), SP_2216 (PscB), and SPR_0907 (PhtD). Responding donors had diverging recognition patterns and profiles of signature cytokines (gamma interferon [IFN-γ], tumor necrosis factor alpha [TNF-α], interleukin-13 [IL-13], and/or IL-17A) against single-epitope regions. Natural HLA-DR-restricted presentation and recognition of a predicted SP_1923-derived epitope were validated through the isolation of a CD4+ T-cell clone producing IFN-γ, TNF-α, and IL-17A in response to the synthetic peptide, whole protein, and heat-inactivated pneumococcus. This proof of principle for a bioinformatics tool to identify pneumococcal protein epitopes targeted by human CD4+ T cells provides a peptide-based strategy to study cell-mediated immune mechanisms for the pneumococcal proteome, advancing the development of immunomonitoring assays and targeted vaccine approaches.
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15
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Huang CC, Wu PW, Chen CL, Wang CH, Lee TJ, Tsai CN, Chiu CH. IL-17A expression in the adenoid tissue from children with sleep disordered breathing and its association with pneumococcal carriage. Sci Rep 2018; 8:16770. [PMID: 30425273 PMCID: PMC6233154 DOI: 10.1038/s41598-018-35169-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 08/20/2018] [Indexed: 12/13/2022] Open
Abstract
Tonsil and adenoid-tissue hypertrophy (AH) is the most common cause of pediatric sleep-disordered breathing (SDB), with AH possibly initiated by repeated exposure to infectious agents or allergens. Here, we evaluated IL-17A activity in adenoid tissue from children with SDB and its association with AH and pneumococcal carriage. Thirty-five children (aged 3-12 years) with SDB and receiving adenoidectomy and tonsillectomy were enrolled. During surgery, nasopharyngeal carriage was determined by bacterial culture and multiplex PCR via nasopharyngeal swab, and adenoid samples were collected. IL-17A and associated cytokine expression was evaluated by real-time PCR and western blotting. The mRNA analysis showed that IL-17A level, IL-17A:IL-10 ratio, and RAR-related orphan receptor-γt:forkhead box P3 ratio were significantly higher in adenoid tissues with AH, as were IL-17A level and IL-17A:IL-10 ratio in adenoid tissues with pneumococcal carriage. Additionally, pneumococcal carriage was more common in nasopharyngeal adenoids from patients without AH than those with AH. IL-17A was upregulated in adenoid tissues from patients with AH and with pneumococcal carriage. These results suggested that pneumococcal carriage initiates an IL-17A-mediated immune response in nasopharyngeal adenoids, which might be associated with AH in patients with SDB.
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Affiliation(s)
- Chien-Chia Huang
- Division of Rhinology, Department of Otolaryngology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan.,Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Pei-Wen Wu
- Division of Rhinology, Department of Otolaryngology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan.,Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital and Chang Gung University, Keelung, Taiwan
| | - Chyi-Liang Chen
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chun-Hua Wang
- Department of Thoracic Medicine, Chang Gung Memorial Hospital and Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
| | - Ta-Jen Lee
- Division of Rhinology, Department of Otolaryngology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
| | - Chi-Neu Tsai
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Hsun Chiu
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan. .,Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan.
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16
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Lu YJ, Oliver E, Zhang F, Pope C, Finn A, Malley R. Screening for Th17-Dependent Pneumococcal Vaccine Antigens: Comparison of Murine and Human Cellular Immune Responses. Infect Immun 2018; 86:e00490-18. [PMID: 30150255 PMCID: PMC6204694 DOI: 10.1128/iai.00490-18] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 08/17/2018] [Indexed: 12/14/2022] Open
Abstract
Conjugate vaccines against Streptococcus pneumoniae have significantly reduced the incidence of diseases caused by the serotypes included in those vaccines; however, there is still a need for vaccines that confer serotype-independent protection. In the current study, we have constructed a library of conserved surface proteins from S. pneumoniae and have screened for IL-17A and IL-22 production in human immune cells obtained from adenoidal/tonsillar tissues of children and IL-17A production in splenocytes from mice that had been immunized with a killed whole-cell vaccine or previously exposed to pneumococcus. A positive correlation was found between the rankings of proteins from human IL-17A and IL-22 screens, but not between those from human and mouse screens. All proteins were tested for protection against colonization, and we identified protective antigens that are IL-17A dependent. We found that the likelihood of finding a protective antigen is significantly higher for groups of proteins ranked in the top 50% of all three screens than for groups of proteins ranked in the bottom 50% of all three. The results thus confirmed the value of such screens for identifying Th17 antigens. Further, these experiments have evaluated and compared the breadth of human and mouse Th17 responses to pneumococcal colonization and have enabled the identification of potential vaccine candidates based on immunological responses in mouse and human cells.
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Affiliation(s)
- Ying-Jie Lu
- Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Elizabeth Oliver
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
| | - Fan Zhang
- Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Caroline Pope
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
| | - Adam Finn
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
- School of Population Health Sciences, University of Bristol, Bristol, United Kingdom
| | - Richard Malley
- Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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17
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Croucher NJ, Løchen A, Bentley SD. Pneumococcal Vaccines: Host Interactions, Population Dynamics, and Design Principles. Annu Rev Microbiol 2018; 72:521-549. [DOI: 10.1146/annurev-micro-090817-062338] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Streptococcus pneumoniae (the pneumococcus) is a nasopharyngeal commensal and respiratory pathogen. Most isolates express a capsule, the species-wide diversity of which has been immunologically classified into ∼100 serotypes. Capsule polysaccharides have been combined into multivalent vaccines widely used in adults, but the T cell independence of the antibody response means they are not protective in infants. Polysaccharide conjugate vaccines (PCVs) trigger a T cell–dependent response through attaching a carrier protein to capsular polysaccharides. The immune response stimulated by PCVs in infants inhibits carriage of vaccine serotypes (VTs), resulting in population-wide herd immunity. These were replaced in carriage by non-VTs. Nevertheless, PCVs drove reductions in infant pneumococcal disease, due to the lower mean invasiveness of the postvaccination bacterial population; age-varying serotype invasiveness resulted in a smaller reduction in adult disease. Alternative vaccines being tested in trials are designed to provide species-wide protection through stimulating innate and cellular immune responses, alongside antibodies to conserved antigens.
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Affiliation(s)
- Nicholas J. Croucher
- Department of Infectious Disease Epidemiology, Imperial College London, London W2 1PG, United Kingdom
| | - Alessandra Løchen
- Department of Infectious Disease Epidemiology, Imperial College London, London W2 1PG, United Kingdom
| | - Stephen D. Bentley
- Infection Genomics Programme, Wellcome Sanger Institute, Hinxton, Cambridge CB10 1SA, United Kingdom
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18
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Kim HY, Kim SK, Seo HS, Jeong S, Ahn KB, Yun CH, Han SH. Th17 activation by dendritic cells stimulated with gamma-irradiated Streptococcus pneumoniae. Mol Immunol 2018; 101:344-352. [PMID: 30036800 DOI: 10.1016/j.molimm.2018.07.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/22/2018] [Accepted: 07/15/2018] [Indexed: 12/11/2022]
Abstract
Dendritic cells (DCs) play an important role in antigen presentation, which is an essential step for the induction of antigen-specific adaptive immunity. Inactivated bacterial whole cell vaccines have been widely used to prevent many bacterial infections because they elicit good immunogenicity due to the presence of various antigens and are relatively inexpensive and easy to manufacture. Recently, gamma-irradiated whole cells of nonencapsulated Streptococcus pneumoniae were developed as a broad-spectrum and serotype-independent multivalent vaccine. In the present study, we generated gamma-irradiated S. pneumoniae (r-SP) and investigated its capacity to stimulate mouse bone marrow-derived DCs (BM-DCs) in comparison with heat-inactivated and formalin-inactivated S. pneumoniae (h-SP and f-SP, respectively). r-SP showed an attenuated binding and internalization level to BM-DCs when compared to h-SP or f-SP. r-SP weakly induced the expression of CD80, CD83, CD86, MHC class I, and PD-L2 compared with h-SP or f-SP. Furthermore, r-SP less potently induced IL-6, TNF-α, and IL-23 expression than h-SP or f-SP but more potently induced IL-1β expression than h-SP or f-SP in BM-DCs. Since Th17-mediated immune responses are known to be important for the protection against pneumococcal infections, r-SP-primed DCs were co-cultured with splenocytes or splenic CD4+ T cells. Interestingly, r-SP-sensitized BM-DCs markedly induced IL-17A+ CD4+ T cells whereas h-SP- or f-SP-sensitized BM-DCs weakly induced them. Collectively, these results suggest that r-SP could be an effective pneumococcal vaccine candidate eliciting Th17-mediated immune responses by stimulation of DCs.
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Affiliation(s)
- Hyun Young Kim
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Sun Kyung Kim
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Ho Seong Seo
- Research Division for Biotechnology, Korea Atomic Energy Research Institute, Jeongeup 56212, Republic of Korea
| | - Soyoung Jeong
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Ki Bum Ahn
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea; Research Division for Biotechnology, Korea Atomic Energy Research Institute, Jeongeup 56212, Republic of Korea
| | - Cheol-Heui Yun
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea.
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Activation and Induction of Antigen-Specific T Follicular Helper Cells Play a Critical Role in Live-Attenuated Influenza Vaccine-Induced Human Mucosal Anti-influenza Antibody Response. J Virol 2018; 92:JVI.00114-18. [PMID: 29563292 PMCID: PMC5952133 DOI: 10.1128/jvi.00114-18] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 03/14/2018] [Indexed: 11/20/2022] Open
Abstract
There is increasing interest recently in developing intranasal vaccines against respiratory tract infections. The antibody response is critical for vaccine-induced protection, and T follicular helper cells (TFH) are considered important for mediating the antibody response. Most data supporting the role for TFH in the antibody response are from animal studies, and direct evidence from humans is limited, apart from the presence of TFH-like cells in blood. We studied the activation and induction of TFH and their role in the anti-influenza antibody response induced by a live-attenuated influenza vaccine (LAIV) in human nasopharynx-associated lymphoid tissue (NALT). TFH activation in adenotonsillar tissues was analyzed by flow cytometry, and anti-hemagglutinin (anti-HA) antibodies were examined following LAIV stimulation of tonsillar mononuclear cells (MNC). Induction of antigen-specific TFH by LAIV was studied by flow cytometry analysis of induced TFH and CD154 expression. LAIV induced TFH proliferation, which correlated with anti-HA antibody production, and TFH were shown to be critical for the antibody response. Induction of TFH from naive T cells by LAIV was shown in newly induced TFH expressing BCL6 and CD21, followed by the detection of anti-HA antibodies. Antigen specificity of LAIV-induced TFH was demonstrated by expression of the antigen-specific T cell activation marker CD154 upon challenge by H1N1 virus antigen or HA. LAIV-induced TFH differentiation was inhibited by BCL6, interleukin-21 (IL-21), ICOS, and CD40 signaling blocking, and that diminished anti-HA antibody production. In conclusion, we demonstrated the induction by LAIV of antigen-specific TFH in human NALT that provide critical support for the anti-influenza antibody response. Promoting antigen-specific TFH in NALT by use of intranasal vaccines may provide an effective vaccination strategy against respiratory infections in humans. IMPORTANCE Airway infections, such as influenza, are common in humans. Intranasal vaccination has been considered a biologically relevant and effective way of immunization against airway infection. The vaccine-induced antibody response is crucial for protection against infection. Recent data from animal studies suggest that one type of T cells, TFH, are important for the antibody response. However, data on whether TFH-mediated help for antibody production operates in humans are limited due to the lack of access to human immune tissue containing TFH. In this study, we demonstrate the induction of TFH in human immune tissue, providing critical support for the anti-influenza antibody response, by use of an intranasal influenza vaccine. Our findings provide direct evidence that TFH play a critical role in vaccine-induced immunity in humans and suggest a novel strategy for promoting such cells by use of intranasal vaccines against respiratory infections.
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20
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Immunodominance in T cell responses elicited against different domains of detoxified pneumolysin PlyD1. PLoS One 2018; 13:e0193650. [PMID: 29509778 PMCID: PMC5839544 DOI: 10.1371/journal.pone.0193650] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 02/15/2018] [Indexed: 12/05/2022] Open
Abstract
Detoxified pneumolysin, PlyD1, is a protein vaccine candidate that induces protection against infections with Streptococcus pneumoniae in mouse models. Despite extensive knowledge on antibody responses against PlyD1, limited information is available about PlyD1 induced T cell recognition. Here we interrogated epitope breadth and functional characteristics of the T cell response to PlyD1 in two mouse strains. BALB/c (H-2d) and C57BL/6 (H-2b) mice were vaccinated with Al(OH)3-adjuvanted or non-adjuvanted PlyD1, or placebo, on day 0, 21 and 42 and were sacrificed at day 56 for collection of sera and spleens. Vaccination with adjuvanted and non-adjuvanted PlyD1 induced anti-pneumolysin IgG antibodies with neutralizing capacity in both mouse strains. Adjuvantation of PlyD1 enhanced the serological responses in both strains. In vitro restimulation of splenocytes with PlyD1 and 18-mer synthetic peptides derived from pneumolysin revealed specific proliferative and cytokine responses. For both mouse strains, one immunodominant and three subdominant natural epitopes were identified. Overlap between H-2d and H-2b restricted T cell epitopes was limited, yet similarities were found between epitopes processed in mice and predicted to be immunogenic in humans. H-2d restricted T cell epitopes were localized in pneumolysin domains 2 and 3, whereas H-2b epitopes were scattered over the protein. Cytokine responses show mostly a Th2 profile, with low levels of Th1 cytokines, in both mouse strains. In conclusion, PlyD1 evokes T cell responses in mice directed against multiple epitope regions, that is dependent on Major Histocompatibility Complex (MHC) background. These results are important to understand human PlyD1 T cell immunogenicity, to guide cell mediated immunity studies in the context of vaccine development.
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21
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Abstract
Colonization of the human nasopharynx by pneumococcus is extremely common and is both the primary reservoir for transmission and a prerequisite for disease. Current vaccines targeting the polysaccharide capsule effectively prevent colonization, conferring herd protection within vaccinated communities. However, these vaccines cover only a subset of all circulating pneumococcal strains, and serotype replacement has been observed. Given the success of pneumococcal conjugate vaccine (PCV) in preventing colonization in unvaccinated adults within vaccinated communities, reducing nasopharyngeal colonization has become an outcome of interest for novel vaccines. Here, we discuss the immunological mechanisms that control nasopharyngeal colonization, with an emphasis on findings from human studies. Increased understanding of these immunological mechanisms is required to identify correlates of protection against colonization that will facilitate the early testing and design of novel vaccines.
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Affiliation(s)
- Simon P. Jochems
- Department of Clinicial Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- * E-mail: (SPJ); (DMF)
| | - Jeffrey N. Weiser
- Department of Microbiology, New York University School of Medicine, New York, New York, United States of America
| | - Richard Malley
- Division of Infectious Diseases, Boston Children′s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Daniela M. Ferreira
- Department of Clinicial Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- * E-mail: (SPJ); (DMF)
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22
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Basha S, Kaur R, Mosmann TR, Pichichero ME. Reduced T-Helper 17 Responses to Streptococcus pneumoniae in Infection-Prone Children Can Be Rescued by Addition of Innate Cytokines. J Infect Dis 2017; 215:1321-1330. [PMID: 28201637 DOI: 10.1093/infdis/jix090] [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] [Received: 12/02/2016] [Accepted: 02/09/2017] [Indexed: 12/20/2022] Open
Abstract
Background T-helper (Th) 17 cells are important in the control of Streptococcus pneumoniae. We sought to understand the mechanism of failure of Th17 immunity resulting in S. pneumoniae infections in children <2 years old. Methods Peripheral blood mononuclear cells (PBMCs) from infection-prone (IP) and non-IP (NIP) children 9-18 months old were examined for their responses to heat-killed S. Pneumoniae, using flow cytometry, reverse-transcription polymerase chain reaction, and enzyme-linked immunoassay. We measured cytokine production, proliferation, and differentiation of Th17 cells and the expression of transcription factors in response to S. pneumoniae. Results PBMCs of IP children stimulated with heat-killed S. pneumoniae had significantly reduced percentages of CD4+ Th1 (interleukin2, tumor necrosis factor α) and Th17 (interleukin 17A) cells compared with NIP children. Addition of exogenous Th17-promoting cytokines (interleukin 6, 1β, and 23 and transforming growth factor β) restored CD4+ Th17 cell function in cells from IP children to levels measured in NIP children. Conclusions Reduced Th17 responses to S. pneumoniae in PBMCs of IP children can be rescued by addition of Th17-promoting cytokines.
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Affiliation(s)
- Saleem Basha
- Center for Infectious Diseases and Immunology, Rochester General Hospital Research Institute and
| | - Ravinder Kaur
- Center for Infectious Diseases and Immunology, Rochester General Hospital Research Institute and
| | - Tim R Mosmann
- Human Immunology Center, University of Rochester Medical Center, New York
| | - Michael E Pichichero
- Center for Infectious Diseases and Immunology, Rochester General Hospital Research Institute and
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23
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Dommaschk A, Ding N, Tort Tarres M, Bittersohl LF, Maus R, Stolper J, Jonigk D, Braubach P, Lippmann T, Welte T, Maus UA. Nasopharyngeal colonization with Streptococcus pneumoniae triggers dendritic cell dependent antibody responses against invasive disease in mice. Eur J Immunol 2017; 47:540-551. [PMID: 28101913 DOI: 10.1002/eji.201646700] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/12/2016] [Accepted: 01/13/2017] [Indexed: 01/05/2023]
Abstract
Nasopharyngeal colonization with Streptococcus pneumoniae (Spn) is an important precondition for the development of pneumococcal pneumonia. At the same time, nasopharyngeal colonization with Spn has been shown to mount adaptive immune responses against Spn in mice and humans. Cellular responses of the nasopharyngeal compartment, including the nasal-associated lymphoid tissue, to pneumococcal colonization and their importance for developing adaptive immune responses are poorly defined. We show that nasopharyngeal colonization with S. pneumoniae led to substantial expansion of dendritic cells (DCs) both in nasopharyngeal tissue and nasal-associated lymphoid tissue of mice. Depletion of DCs achieved by either diphtheria toxin (DT) treatment of chimeric zDC+/DTR mice, or by use of FMS-like tyrosine kinase 3 ligand (Flt3L) KO mice exhibiting congenitally reduced DC pool sizes, significantly diminished antibody responses after colonization with Spn, along with impaired protective immunity against invasive pneumococcal disease. Collectively, the data show that classical DCs contribute to pneumococcal colonization induced adaptive immune responses against invasive pneumococcal disease in two different mouse models. These data may be useful for future nasopharyngeal vaccination strategies against pneumococcal diseases in humans.
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Affiliation(s)
- Anne Dommaschk
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Nadine Ding
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Meritxell Tort Tarres
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Lara F Bittersohl
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Regina Maus
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Jennifer Stolper
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany
| | - Danny Jonigk
- Institute of Pathology, Hannover School of Medicine, Hannover, Germany.,German Center for Lung Research, partner site BREATH, Hannover, Germany
| | - Peter Braubach
- Institute of Pathology, Hannover School of Medicine, Hannover, Germany
| | - Torsten Lippmann
- Institute of Pathology, Hannover School of Medicine, Hannover, Germany
| | - Tobias Welte
- Clinic for Pneumology, Hannover School of Medicine, Hannover, Germany.,German Center for Lung Research, partner site BREATH, Hannover, Germany
| | - Ulrich A Maus
- Department of Experimental Pneumology, Hannover School of Medicine, Hannover, Germany.,German Center for Lung Research, partner site BREATH, Hannover, Germany
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24
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Francis JP, Richmond PC, Strickland D, Prescott SL, Pomat WS, Michael A, Nadal-Sims MA, Edwards-Devitt CJ, Holt PG, Lehmann D, van den Biggelaar AHJ. Cord blood Streptococcus pneumoniae-specific cellular immune responses predict early pneumococcal carriage in high-risk infants in Papua New Guinea. Clin Exp Immunol 2016; 187:408-417. [PMID: 27859014 PMCID: PMC5290304 DOI: 10.1111/cei.12902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 10/03/2016] [Accepted: 10/27/2016] [Indexed: 12/01/2022] Open
Abstract
In areas where Streptococcus pneumoniae is highly endemic, infants experience very early pneumococcal colonization of the upper respiratory tract, with carriage often persisting into adulthood. We aimed to explore whether newborns in high‐risk areas have pre‐existing pneumococcal‐specific cellular immune responses that may affect early pneumococcal acquisition. Cord blood mononuclear cells (CBMC) of 84 Papua New Guinean (PNG; high endemic) and 33 Australian (AUS; low endemic) newborns were stimulated in vitro with detoxified pneumolysin (dPly) or pneumococcal surface protein A (PspA; families 1 and 2) and compared for cytokine responses. Within the PNG cohort, associations between CBMC dPly and PspA‐induced responses and pneumococcal colonization within the first month of life were studied. Significantly higher PspA‐specific interferon (IFN)‐γ, tumour necrosis factor (TNF)‐α, interleukin (IL)‐5, IL‐6, IL‐10 and IL‐13 responses, and lower dPly‐IL‐6 responses were produced in CBMC cultures of PNG compared to AUS newborns. Higher CBMC PspA‐IL‐5 and PspA‐IL‐13 responses correlated with a higher proportion of cord CD4 T cells, and higher dPly‐IL‐6 responses with a higher frequency of cord antigen‐presenting cells. In the PNG cohort, higher PspA‐specific IL‐5 and IL‐6 CBMC responses were associated independently and significantly with increased risk of earlier pneumococcal colonization, while a significant protective effect was found for higher PspA‐IL‐10 CBMC responses. Pneumococcus‐specific cellular immune responses differ between children born in pneumococcal high versus low endemic settings, which may contribute to the higher risk of infants in high endemic settings for early pneumococcal colonization, and hence disease.
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Affiliation(s)
- J P Francis
- Papua New Guinea Institute of Medical Research, Goroka, Papua New Guinea
| | - P C Richmond
- School of Paediatrics and Child Health, University of Western Australia, Perth, Australia
| | - D Strickland
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - S L Prescott
- School of Paediatrics and Child Health, University of Western Australia, Perth, Australia
| | - W S Pomat
- Papua New Guinea Institute of Medical Research, Goroka, Papua New Guinea
| | - A Michael
- Papua New Guinea Institute of Medical Research, Goroka, Papua New Guinea
| | - M A Nadal-Sims
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - C J Edwards-Devitt
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - P G Holt
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - D Lehmann
- Telethon Kids Institute, University of Western Australia, Perth, Australia
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25
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Dagan R, Juergens C, Trammel J, Patterson S, Greenberg D, Givon-Lavi N, Porat N, Gruber WC, Scott DA. Modeling pneumococcal nasopharyngeal acquisition as a function of anticapsular serum antibody concentrations after pneumococcal conjugate vaccine administration. Vaccine 2016; 34:4313-20. [DOI: 10.1016/j.vaccine.2016.06.075] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 06/23/2016] [Accepted: 06/27/2016] [Indexed: 10/21/2022]
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26
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Mubarak A, Ahmed MS, Upile N, Vaughan C, Xie C, Sharma R, Acar P, McCormick MS, Paton JC, Mitchell T, Cunliffe N, Zhang Q. A dynamic relationship between mucosal T helper type 17 and regulatory T-cell populations in nasopharynx evolves with age and associates with the clearance of pneumococcal carriage in humans. Clin Microbiol Infect 2016; 22:736.e1-7. [PMID: 27256063 DOI: 10.1016/j.cmi.2016.05.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/12/2016] [Accepted: 05/19/2016] [Indexed: 12/13/2022]
Abstract
Pneumococcal carriage is common in young children, which may account for the high incidence of disease in this age group. Host factors determining the clearance of carriage in humans remain unclear. We aimed to study the relationships between T helper type 17 (Th17) and Foxp3(+) regulatory T (Treg) cells in nasopharynx-associated lymphoid tissue (NALT) and carriage in children and adults. Frequencies of Th17 and Treg cells in NALT were analysed by flow cytometry in association with age and pneumococcal carriage status. Cytokine responses following pneumococcal stimulation were analysed by cytometric beads array. The frequencies of Th17 and Treg cells in NALT were inversely correlated (R -0.60). Whereas Treg cell frequency decreased with age (R -0.63), both Th17 and the Th17: Treg ratio increased with age (R 0.62 and R 0.64, respectively). Also, the Th17: Treg ratio was higher in carriage-negative than in carriage-positive children (p <0.01). Pneumococcal stimulation of tonsillar cells increased both Th17 and Treg cell numbers, but the Th17: Treg ratio and pattern of cytokine responses differed between carriage-negative and carriage-positive children. The former showed markedly higher Th17: Treg and interleukin-17A: interleukin-10 ratios than in the latter (p <0.01). Pneumococcal stimulation also induces Th17, although the capacity of this Th17 differentiation from naive T cells of young children was low, but increased with age. We demonstrated a dynamic relationship between Th17 and Treg cells in human nasopharynx that evolves with age. The balance between Th17 and Treg cells in NALT appears to be a major host factor closely associated with the clearance of Streptococcus pneumoniae from the nasopharynx.
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Affiliation(s)
- A Mubarak
- Institute of Infection and Global Health, Department of Clinical Infection Microbiology and Immunology, Liverpool, UK
| | - M S Ahmed
- Institute of Infection and Global Health, Department of Clinical Infection Microbiology and Immunology, Liverpool, UK
| | - N Upile
- Department of Otolaryngology, Alder Hey Children's Hospital, Liverpool, UK
| | - C Vaughan
- Department of Otolaryngology, Alder Hey Children's Hospital, Liverpool, UK
| | - C Xie
- Department of Otolaryngology, Alder Hey Children's Hospital, Liverpool, UK
| | - R Sharma
- Department of Otolaryngology, Alder Hey Children's Hospital, Liverpool, UK
| | - P Acar
- Department of Otolaryngology, Royal Liverpool University Hospital, Liverpool, UK
| | - M S McCormick
- Department of Otolaryngology, Royal Liverpool University Hospital, Liverpool, UK
| | - J C Paton
- Institute of Infection, Research Centre for Infectious Diseases, School of Biomedical Sciences, University of Adelaide, Adelaide, Australia
| | - T Mitchell
- Institute of Microbiology and Infection and School of Immunity and Infection, University of Birmingham, Birmingham, UK
| | - N Cunliffe
- Institute of Infection and Global Health, Department of Clinical Infection Microbiology and Immunology, Liverpool, UK
| | - Q Zhang
- Institute of Infection and Global Health, Department of Clinical Infection Microbiology and Immunology, Liverpool, UK.
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27
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A critical role of T follicular helper cells in human mucosal anti-influenza response that can be enhanced by immunological adjuvant CpG-DNA. Antiviral Res 2016; 132:122-30. [PMID: 27247060 DOI: 10.1016/j.antiviral.2016.05.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/23/2016] [Accepted: 05/26/2016] [Indexed: 01/22/2023]
Abstract
T Follicular helper cells (TFH) are considered critical for B cell antibody response, and recent efforts have focused on promoting TFH in order to enhance vaccine efficacy. We studied the frequency and function of TFH in nasopharynx-associated lymphoid tissues (NALT) from children and adults, and its role in anti-influenza antibody response following stimulation by a live-attenuated influenza vaccine (LAIV) or an inactivated seasonal virus antigen (sH1N1). We further studied whether CpG-DNA promotes TFH and by which enhances anti-influenza response. We showed NALT from children aged 1.5-10 years contained abundant TFH, suggesting efficient priming of TFH during early childhood. Stimulation by LAIV induced a marked increase in TFH that correlated with a strong production of anti-hemagglutinin (HA) IgA/IgG/IgM antibodies in tonsillar cells. Stimulation by the inactivated sH1N1 antigen induced a small increase in TFH which was markedly enhanced by CpG-DNA, accompanied by enhanced anti-HA antibody responses. In B cell co-culture experiment, anti-HA responses were only seen in the presence of TFH, and addition of plasmacytoid dendritic cell to TFH-B cell co-culture enhanced the TFH-mediated antibody production following CpG-DNA and sH1N1 antigen stimulation. Induction of TFH differentiation from naïve T cells was also shown following the stimulation. Our results support a critical role of TFH in human mucosal anti-influenza antibody response. Use of an adjuvant such as CpG-DNA that has the capacity to promote TFH by which to enhance antigen-induced antibody responses in NALT tissue may have important implications for future vaccination strategies against respiratory pathogens.
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28
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Mullin J, Ahmed MS, Sharma R, Upile N, Beer H, Achar P, Puksuriwong S, Ferrara F, Temperton N, McNamara P, Lambe T, Gilbert SC, Zhang Q. Activation of cross-reactive mucosal T and B cell responses in human nasopharynx-associated lymphoid tissue in vitro by Modified Vaccinia Ankara-vectored influenza vaccines. Vaccine 2016; 34:1688-95. [DOI: 10.1016/j.vaccine.2016.02.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 01/14/2016] [Accepted: 02/10/2016] [Indexed: 01/09/2023]
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29
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Pichichero ME, Khan MN, Xu Q. Next generation protein based Streptococcus pneumoniae vaccines. Hum Vaccin Immunother 2016; 12:194-205. [PMID: 26539741 PMCID: PMC4962723 DOI: 10.1080/21645515.2015.1052198] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 04/27/2015] [Accepted: 05/12/2015] [Indexed: 12/22/2022] Open
Abstract
All currently available Streptococcus pneumoniae (Spn) vaccines have limitations due to their capsular serotype composition. Both the 23-valent Spn polysaccharide vaccine (PPV) and 7, 10, or 13-valent Spn conjugate vaccines (PCV-7, 10, -13) are serotype-based vaccines and therefore they elicit only serotype-specific immunity. Emergence of replacement Spn strains expressing other serotypes has consistently occurred following introduction of capsular serotype based Spn vaccines. Furthermore, capsular polysaccharide vaccines are less effective in protection against non-bacteremic pneumonia and acute otitis media (AOM) than against invasive pneumococcal disease (IPD). These shortcomings of capsular polysaccharide-based Spn vaccines have created high interest in development of non-serotype specific protein-based vaccines that could be effective in preventing both IPD and non-IPD infections. This review discusses the progress to date on development of Spn protein vaccine candidates that are highly conserved by all Spn strains, are highly conserved, exhibit maximal antigenicity and minimal reactogenicity to replace or complement the current capsule-based vaccines. Key to development of a protein based Spn vaccine is an understanding of Spn pathogenesis. Based on pathogenesis, a protein-based Spn vaccine should include one or more ingredients that reduce NP colonization below a pathogenic inoculum. Elimination of all Spn colonization may not be achievable or even advisable. The level of expression of a target protein antigen during pathogenesis is another key to the success of protein based vaccines.. As with virtually all currently licensed vaccines, production of a serum antibody response in response to protein based vaccines is anticipated to provide protection from Spn infections. A significant advantage that protein vaccine formulations can offer over capsule based vaccination is their potential benefits associated with natural priming and boosting to all strains of Spn. One of the most universal and comprehensive approaches of identifying novel vaccine candidates is the investigation of human sera from different disease stages of natural infections. Antigens that are robustly reactive in preliminary human serum screening constitute a pathogen-specific antigenome. This strategy has identified a number of Spn protein vaccine candidates that are moving forward in human clinical trials.
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Affiliation(s)
| | - M Nadeem Khan
- Research Institute; Rochester General Hospital; Rochester, NY USA
| | - Qingfu Xu
- Research Institute; Rochester General Hospital; Rochester, NY USA
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30
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Khan MN, Pichichero ME. The host immune dynamics of pneumococcal colonization: implications for novel vaccine development. Hum Vaccin Immunother 2015; 10:3688-99. [PMID: 25668673 DOI: 10.4161/21645515.2014.979631] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The human nasopharynx (NP) microbiota is complex and diverse and Streptococcus pneumoniae (pneumococcus) is a frequent member. In the first few years of life, children experience maturation of their immune system thereby conferring homeostatic balance in which pneumococci are typically rendered as harmless colonizers in the upper respiratory environment. Pneumococcal carriage declines in many children before they acquire capsular-specific antibodies, suggesting a capsule antibody-independent mechanism of natural protection against pneumococcal carriage in early childhood. A child's immune system in the first few years of life is Th2-skewed so as to avoid inflammation-induced immunopathology. Understanding Th1/Th2 and Th17 ontogeny in early life and how adjuvant vaccine formulations shift the balance of T helper-cell differentiation, may facilitate the development of new protein-based pneumococcal vaccines. This article will discuss the immune dynamics of pneumococcal colonization in infants. The discussion aims to benefit the design and improvement of protein subunit-based next-generation pneumococcal vaccines.
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Affiliation(s)
- M Nadeem Khan
- a Center for Infectious Diseases and Immunology; Rochester General Hospital Research Institute ; Rochester , NY USA
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31
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Banerjee S, Ninkovic J, Meng J, Sharma U, Ma J, Charboneau R, Roy S. Morphine compromises bronchial epithelial TLR2/IL17R signaling crosstalk, necessary for lung IL17 homeostasis. Sci Rep 2015; 5:11384. [PMID: 26072707 PMCID: PMC4466887 DOI: 10.1038/srep11384] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 04/10/2015] [Indexed: 11/09/2022] Open
Abstract
Opportunistic lung infection and inflammation is a hallmark of chronic recreational/clinical use of morphine. We show that early induction of IL17 from the bronchial epithelium, following pathogenic encounter is a protective response, which contributes to pathogenic clearance and currently attributed to TLR2 activation in immune cells. Concurrent activation of TLR2 and IL17R in bronchial epithelium results in the sequestration of MyD88 (TLR2 adapter) by Act1/CIKS (IL17R adapter), thereby turning off TLR2 signaling to restore homeostasis. Morphine inhibits the early IL17 release and interaction between Act1 and MyD88, leading to decreased pathogenic clearance and sustained inflammation. Hence, we propose that therapeutically targeting either TLR2 or IL17 in bronchial epithelia, in the context of morphine, can restore inflammatory homeostasis.
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Affiliation(s)
- Santanu Banerjee
- Surgery, Basic and Translational Research, University of Minnesota, 515 Delaware St SE, Minneapolis, MN, USA
| | - Jana Ninkovic
- Surgery, Basic and Translational Research, University of Minnesota, 515 Delaware St SE, Minneapolis, MN, USA
| | - Jingjing Meng
- Pharmacology, University of Minnesota, 321 Church St SE, Minneapolis, MN, USA
| | - Umakant Sharma
- Surgery, Basic and Translational Research, University of Minnesota, 515 Delaware St SE, Minneapolis, MN, USA
| | - Jing Ma
- Surgery, Basic and Translational Research, University of Minnesota, 515 Delaware St SE, Minneapolis, MN, USA
| | - Richard Charboneau
- Surgery, Basic and Translational Research, University of Minnesota, 515 Delaware St SE, Minneapolis, MN, USA
| | - Sabita Roy
- Surgery, Basic and Translational Research, University of Minnesota, 515 Delaware St SE, Minneapolis, MN, USA.,Pharmacology, University of Minnesota, 321 Church St SE, Minneapolis, MN, USA
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32
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Jiang XL, Zhang GL, Yang T, Yang BH, Wang LJ, Wang QH, Luo ZX, Liu EM, Fu Z. Association of Pneumococcal Carriage and Expression of Foxp3+ Regulatory T Cells and Th17 Cells in the Adenoids of Children. Respiration 2015; 90:25-32. [PMID: 25925832 DOI: 10.1159/000381724] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 03/16/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Pneumococcal carriage in the nasopharynx is a primary means of transmission and a necessary prerequisite for pneumococcal disease. OBJECTIVES We analyzed the relationship between expressions of Foxp3+ regulatory T (Treg) cells and Th17 cells, and pneumococcal carriage in the adenoids of children who were either positive or negative for pneumococci. METHODS We collected adenoidal tissue and nasopharyngeal swab samples from children undergoing an adenoidectomy. Adenoidal mononuclear cells were isolated, cultured and then stimulated with culture concentrated supernatant (CCS) obtained from a D39 bacterial strain. RESULTS Foxp3+ Treg cells were upregulated and Th17 cells were downregulated in populations of adenoidal mononuclear cells obtained from the pneumococcus-positive group. Following CCS stimulation, the increment in Foxp3+ Treg cells in the pneumococcus-positive group was significantly greater than that in the pneumococcus-negative group, while the increment in Th17 cells was less as compared to that in the pneumococcus-negative group. These results were consistent with variations in levels of Foxp3 mRNA and retinoic acid receptor-related orphan receptor-γt mRNA in adenoidal mononuclear cells. Levels of IL-17A and IL-6 in adenoid tissue were higher in the pneumococcus-negative group, and the levels of TGF-β in adenoid tissue were lower in the pneumococcus-negative group compared to the pneumococcus-positive group. Pneumococcal carriage in children was closely associated with the expressions of Foxp3+ Treg and Th17 cells in the adenoid. CONCLUSION Upregulation of Foxp3+ Treg cells might downregulate the production of Th17 cells in the adenoid, resulting in decreased scavenging of Streptococcus pneumoniae and chronic pneumococcal carriage.
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Affiliation(s)
- Xiao-Li Jiang
- Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Ministry of Education, Chongqing Medical University, Chongqing, China
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33
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Khan MN, Coleman JR, Vernatter J, Varshney AK, Dufaud C, Pirofski LA. An ahemolytic pneumolysin of Streptococcus pneumoniae manipulates human innate and CD4⁺ T-cell responses and reduces resistance to colonization in mice in a serotype-independent manner. J Infect Dis 2014; 210:1658-69. [PMID: 25001458 DOI: 10.1093/infdis/jiu321] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Some Streptococcus pneumoniae serotypes express an ahemolytic pneumolysin (PLYa). Serotypes that commonly express PLYa, including serotype 8 (ST8) and ST1, are often associated with a low prevalence during colonization but a higher propensity to cause invasive disease. We sought to study the host response to ST8 PLYa in a homologous and heterologous capsular background. METHODS We genetically exchanged the PLYa of ST8 strain 6308 with the hemolytic PLY (PLYh) of ST3 A66.1 and vice versa and determined the impact of the exchange on nasopharyngeal colonization in mice. Then, to compare the response of human cells to PLYa-expressing and PLYh-expressing strains, we infected human peripheral blood mononuclear cells (PBMCs) with PLY-switched strains and assessed dendritic cell and CD4(+) T-cell responses by intracellular cytokine staining. RESULT Mice colonized with PLYa-expressing strains had significantly higher colonization densities than those colonized with PLYh-expressing strains, irrespective of capsular background. Compared with infection of PBMCs with PLYh-expressing strains, infection with PLYa-expressing strains induced diminished innate (dendritic cell cytokines, costimulatory receptor, and apoptotic) and adaptive (CD4(+) T-cell proliferative and memory interleukin 17A) responses. CONCLUSION Our findings demonstrate that PLYa has the potential to manipulate host immunity irrespective of capsule type. PLY exchange between STs expressing PLYa and PLYh could lead to unexpected colonization or invasion phenotypes.
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Affiliation(s)
- M Nadeem Khan
- Department of Medicine, Division of Infectious Disease, Albert Einstein College of Medicine and Montefiore Medical Center
| | | | - Joshua Vernatter
- Department of Medicine, Division of Infectious Disease, Albert Einstein College of Medicine and Montefiore Medical Center
| | - Avanish Kumar Varshney
- Department of Medicine, Division of Infectious Disease, Albert Einstein College of Medicine and Montefiore Medical Center
| | - Chad Dufaud
- Department of Medicine, Division of Infectious Disease, Albert Einstein College of Medicine and Montefiore Medical Center
| | - Liise-Anne Pirofski
- Department of Medicine, Division of Infectious Disease, Albert Einstein College of Medicine and Montefiore Medical Center Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx
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