1
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Yee JL, Strelow LI, White JA, Rosenthal AN, Barry PA. Horizontal transmission of endemic viruses among rhesus macaques (Macaca mulatta): Implications for human cytomegalovirus vaccine/challenge design. J Med Primatol 2023; 52:53-63. [PMID: 36151734 PMCID: PMC9825633 DOI: 10.1111/jmp.12621] [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] [Received: 07/13/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 01/11/2023]
Abstract
INTRODUCTION Rhesus macaques are natural hosts to multiple viruses including rhesus cytomegalovirus (RhCMV), rhesus rhadinovirus (RRV), and Simian Foamy Virus (SFV). While viral infections are ubiquitous, viral transmissions to uninfected animals are incompletely defined. Management procedures of macaque colonies include cohorts that are Specific Pathogen Free (SPF). Greater understanding of viral transmission would augment SPF protocols. Moreover, vaccine/challenge studies of human viruses would be enhanced by leveraging transmission of macaque viruses to recapitulate expected challenges of human vaccine trials. MATERIALS AND METHODS This study characterizes viral transmissions to uninfected animals following inadvertent introduction of RhCMV/RRV/SFV-infected adults to a cohort of uninfected juveniles. Following co-housing with virus-positive adults, juveniles were serially evaluated for viral infection. RESULTS Horizontal viral transmission was rapid and absolute, reaching 100% penetrance between 19 and 78 weeks. CONCLUSIONS This study provides insights into viral natural histories with implications for colony management and modeling vaccine-mediated immune protection studies.
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Affiliation(s)
- JoAnn L Yee
- California National Primate Research Center, Davis, California, USA
- University of California, Davis, Davis, California, USA
| | - Lisa I Strelow
- California National Primate Research Center, Davis, California, USA
- University of California, Davis, Davis, California, USA
- Center for Immunology and Infectious Diseases, Davis, California, USA
| | - Jessica A White
- California National Primate Research Center, Davis, California, USA
- University of California, Davis, Davis, California, USA
| | - Ann N Rosenthal
- California National Primate Research Center, Davis, California, USA
- University of California, Davis, Davis, California, USA
| | - Peter A Barry
- California National Primate Research Center, Davis, California, USA
- University of California, Davis, Davis, California, USA
- Center for Immunology and Infectious Diseases, Davis, California, USA
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2
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Pollara J, Edwards RW, Jha S, Lam CYK, Liu L, Diedrich G, Nordstrom JL, Huffman T, Pickeral JA, Denny TN, Permar SR, Ferrari G. Redirection of Cord Blood T Cells and Natural Killer Cells for Elimination of Autologous HIV-1-Infected Target Cells Using Bispecific DART® Molecules. Front Immunol 2020; 11:713. [PMID: 32373131 PMCID: PMC7186435 DOI: 10.3389/fimmu.2020.00713] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/30/2020] [Indexed: 12/18/2022] Open
Abstract
Mother-to-child transmission of HIV-1 remains a major global health challenge. Currently, HIV-1-infected infants require strict lifelong adherence to antiretroviral therapy to prevent replication of virus from reservoirs of infected cells, and to halt progression of disease. There is a critical need for immune interventions that can be deployed shortly after infection to eliminate HIV-1-infected cells in order to promote long-term remission of viremia, or to potentially cure pediatric HIV-1-infection. Bispecific HIV × CD3 DART® molecules able to co-engage the HIV-1 envelope protein on the surface of infected cells and CD3 on cytolytic T cells have been previously shown to eliminate HIV-1 infected cells in vitro and are candidates for passive immunotherapy to reduce the virus reservoir. However, their potential utility as therapy for infant HIV-1 infection is unclear as the ability of these novel antibody-based molecules to work in concert with cells of the infant immune system had not been assessed. Here, we use human umbilical cord blood as a model of the naïve neonatal immune system to evaluate the ability of HIV x CD3 DART molecules to recruit and redirect neonatal effector cells for elimination of autologous CD4+ T cells infected with HIV-1 encoding an envelope gene sequenced from a mother-to-child transmission event. We found that HIV × CD3 DART molecules can redirect T cells present in cord blood for elimination of HIV-infected CD4+ T cells. However, we observed reduced killing by T cells isolated from cord blood when compared to cells isolated from adult peripheral blood-likely due to the absence of the memory and effector CD8+ T cells that are most cytolytic when redirected by bispecific DART molecules. We also found that newly developed HIV × CD16 DART molecules were able to recruit CD16-expressing natural killer cells from cord blood to eliminate HIV-infected cells, and the activity of cord blood natural killer cells could be substantially increased by priming with IL-15. Our results support continued development of HIV-specific DART molecules using relevant preclinical animal models to optimize strategies for effective use of this immune therapy to reduce HIV-1 infection in pediatric populations.
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Affiliation(s)
- Justin Pollara
- Department of Surgery, Duke University School of Medicine, Durham, NC, United States.,Human Vaccine Institute, Duke University School of Medicine, Durham, NC, United States
| | - R Whitney Edwards
- Human Vaccine Institute, Duke University School of Medicine, Durham, NC, United States
| | - Shalini Jha
- Department of Surgery, Duke University School of Medicine, Durham, NC, United States.,Human Vaccine Institute, Duke University School of Medicine, Durham, NC, United States
| | | | - Liqin Liu
- Macrogenics, Inc., Rockville, MD, United States
| | | | | | - Tori Huffman
- Department of Surgery, Duke University School of Medicine, Durham, NC, United States
| | - Joy A Pickeral
- Department of Surgery, Duke University School of Medicine, Durham, NC, United States
| | - Thomas N Denny
- Human Vaccine Institute, Duke University School of Medicine, Durham, NC, United States
| | - Sallie R Permar
- Human Vaccine Institute, Duke University School of Medicine, Durham, NC, United States.,Department of Pediatrics, Duke University School of Medicine, Durham, NC, United States
| | - Guido Ferrari
- Department of Surgery, Duke University School of Medicine, Durham, NC, United States.,Human Vaccine Institute, Duke University School of Medicine, Durham, NC, United States
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3
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Fike AJ, Kumova OK, Carey AJ. Dissecting the defects in the neonatal CD8 + T-cell response. J Leukoc Biol 2019; 106:1051-1061. [PMID: 31260598 DOI: 10.1002/jlb.5ru0319-105r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 05/24/2019] [Accepted: 06/10/2019] [Indexed: 12/26/2022] Open
Abstract
The neonatal period presents a complex scenario where the threshold of reactivity toward colonizing microbiota, maternal antigens, autoantigens, and pathogens must be carefully moderated and balanced. CD8+ T cells are critical for the response against intracellular bacteria and viruses, but this immune compartment maintains altered function relative to adult counterparts because of the unique challenges which infants face. Here, we review our current understanding of the factors which may promote the attenuation and altered function of the neonatal CD8+ T-cell response and potential avenues for future study. Specifically, we have focused on the neonatal CD8+ T-cell ontogeny, memory formation, TCR structure and repertoire, TCR inhibitory receptors, and the clinical implications of altered neonatal CD8+ T-cell function. Special emphasis has been placed on examining the response of preterm neonates relative to term neonates and adults.
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Affiliation(s)
- Adam J Fike
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Ogan K Kumova
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Alison J Carey
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
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4
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Adler SP, Reddehase MJ. Pediatric roots of cytomegalovirus recurrence and memory inflation in the elderly. Med Microbiol Immunol 2019; 208:323-328. [PMID: 31062089 DOI: 10.1007/s00430-019-00609-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 04/05/2019] [Indexed: 12/11/2022]
Abstract
The establishment of a lifelong latent infection after resolution of primary infection is a hallmark of cytomegalovirus (CMV) biology. Primary infection with human CMV is possible any time in life, but most frequently, virus transmission occurs already perinatally or in early childhood. Many years or even decades later, severe clinical problems can result from recurrence of infectious virus by reactivation from latency in individuals who undergo immunocompromising medical treatment, for instance, transplant recipients, but also in septic patients without canonical immunosuppression, and in elderly people with a weakened immune system. The diversity of disease manifestations, such as retinitis, pneumonia, hepatitis, gastrointestinal disease, and others, has remained an enigma. In clinical routine, seropositivity for IgG antibodies against human CMV is taken to indicate latent infection and thus to define a qualitative risk of recurrence, but it is insufficient as a predictor for the quantitative risk of recurrence. Early experimental studies in the mouse model, comparing primary infection of neonatal and adult mice, led to the hypothesis that high load of latent viral genomes is a better predictor for the quantitative risk. A prolonged period of virus multiplication in the immunologically immature neonatally infected host increased the risk of virus recurrence by an enhanced copy number of latent virus genomes from which reactivation can initiate. In extension of this hypothesis, one would predict today that a higher incidence of reactivation events will also fuel the expansion of virus-specific T cells observed in the elderly, a phenomenon known as "memory inflation". Notably, the mouse model also indicated a stochastic nature of reactivation, thus offering an explanation for the diversity and organ selectivity of disease manifestations observed in patients. As the infection history is mostly undefined in humans, such predictions from the mouse model are difficult to verify by clinical investigation, and moreover, such questions were actually rarely addressed. Here, we have surveyed the existing literature for reports that may help to retrospectively relate the individual infection history to the risk of virus recurrence and recrudescent organ disease.
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Affiliation(s)
- Stuart P Adler
- CMV Research Foundation, 9304 Bandock Road, Richmond, VA, 23229, USA.
| | - Matthias J Reddehase
- Institute for Virology and Research Center for Immunotherapy (FZI), University Medical Center of the Johannes Gutenberg-University Mainz, Obere Zahlbacher Strasse 67, Hochhaus am Augustusplatz, 55131, Mainz, Germany.
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5
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Malik A, Adland E, Laker L, Kløverpris H, Fardoos R, Roider J, Severinsen MC, Chen F, Riddell L, Edwards A, Buus S, Jooste P, Matthews PC, Goulder PJR. Immunodominant cytomegalovirus-specific CD8+ T-cell responses in sub-Saharan African populations. PLoS One 2017; 12:e0189612. [PMID: 29232408 PMCID: PMC5726643 DOI: 10.1371/journal.pone.0189612] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 11/29/2017] [Indexed: 01/14/2023] Open
Abstract
More than 90% of children in Africa are infected with cytomegalovirus (CMV) by the age of 12 months. However, the high-frequency, immunodominant CD8+ T-cell responses that control CMV infection have not been well studied in African populations. We therefore sought to define the immunodominant CMV-specific CD8+ T-cell responses within sub-Saharan African study subjects. Among 257 subjects, we determined the CD8+ T-cell responses to overlapping peptides spanning three of the most immunogenic CMV proteins, pp65, IE-1 and IE-2, using IFN-γ ELISpot assays. A bioinformatics tool was used to predict optimal epitopes within overlapping peptides whose recognition was statistically associated with expression of particular HLA class I molecules. Using this approach, we identified 16 predicted novel CMV-specific epitopes within CMV-pp65, IE-1 and IE-2. The immunodominant pp65-specific, IE-1, IE-2 responses were all either previously well characterised or were confirmed using peptide-MHC tetramers. The novel epitopes identified included an IE-2-specific epitope restricted by HLA*B*44:03 that induced high-frequency CD8+ T-cell responses (mean 3.4% of CD8+ T-cells) in 95% of HLA-B*44:03-positive subjects tested, in one individual accounting for 18.8% of all CD8+ T-cells. These predicted novel CMV-specific CD8+ T-cell epitopes identified in an African cohort will facilitate future analyses of immune responses in African populations where CMV infection is almost universal during infancy.
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Affiliation(s)
- Amna Malik
- Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | - Emily Adland
- Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | - Leana Laker
- Kimberley General Hospital, Kimberley, South Africa
| | - Henrik Kløverpris
- Africa Health Research Institute, AHRI, Durban, South Africa
- Laboratory of Experimental Immunology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- University College London, Department of Infection and Immunity, London, United Kingdom
| | - Rabiah Fardoos
- Africa Health Research Institute, AHRI, Durban, South Africa
- Laboratory of Experimental Immunology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Julia Roider
- Africa Health Research Institute, AHRI, Durban, South Africa
| | - Mai C. Severinsen
- Laboratory of Experimental Immunology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Fabian Chen
- Department of Sexual Health, Royal Berkshire Hospital, Reading, United Kingdom
| | - Lynn Riddell
- Department of Genitourinary Medicine, Northamptonshire Healthcare NHS Trust, Northampton General Hospital, Northampton, United Kingdom
| | - Anne Edwards
- Oxford Department of Genitourinary Medicine, the Churchill Hospital, Oxford, United Kingdom
| | - Søren Buus
- Laboratory of Experimental Immunology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Philip J. R. Goulder
- Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- * E-mail:
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6
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Abstract
The early stages of life are associated with increased susceptibility to infection, which is in part due to an ineffective immune system. In the context of infection, the immune system must be stimulated to provide efficient protection while avoiding insufficient or excessive activation. Yet, in early life, age-dependent immune regulation at molecular and cellular levels contributes to a reduced immunological fitness in terms of pathogen clearance and response to vaccines. To enable microbial colonization to be tolerated at birth, epigenetic immune cell programming and early life-specific immune regulatory and effector mechanisms ensure that vital functions and organ development are supported and that tissue damage is avoided. Advancement in our understanding of age-related remodelling of immune networks and the consequent tuning of immune responsiveness will open up new possibilities for immune intervention and vaccine strategies that are designed specifically for early life.
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7
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Chen SF, Holmes TH, Slifer T, Ramachandran V, Mackey S, Hebson C, Arvin AM, Lewis DB, Dekker CL. Longitudinal Kinetics of Cytomegalovirus-Specific T-Cell Immunity and Viral Replication in Infants With Congenital Cytomegalovirus Infection. J Pediatric Infect Dis Soc 2016; 5:14-20. [PMID: 26908487 PMCID: PMC4765489 DOI: 10.1093/jpids/piu089] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 08/08/2014] [Indexed: 11/14/2022]
Abstract
BACKGROUND Congenital cytomegalovirus (CMV) is reported to affect up to 1% of all live births in the United States. T-cell immunity may be important for controlling CMV replication in congenital CMV-infected infants. We describe the natural history of CMV-specific T-cell evolution and CMV replication in infants with congenital CMV infection. METHODS Cytomegalovirus viral load, CMV urine culture, and CMV-specific CD4 and CD8 T-cell responses were assessed in a prospective longitudinal cohort of 51 infants with congenital CMV infection who were observed from birth to 3 years of age. RESULTS We found a kinetic pattern of decreasing urinary CMV replication and increasing CMV-specific CD4 and CD8 T-cell responses during the first 3 years of life. We also found higher CMV-specific CD8 T-cell responses were associated with subsequent reduction of urine CMV viral load. CONCLUSION For infants with congenital CMV infection, our data suggest an age-related maturation of both CMV-specific CD4 and CD8 T-cell immunity that is associated with an age-related decline in urinary CMV replication.
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Affiliation(s)
| | - Tyson H. Holmes
- Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, California
| | | | | | | | - Cathleen Hebson
- Department of Pediatrics, Santa Clara Valley Medical Center, San Jose, California
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8
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Houldcroft C. Sequencing drug-resistant cytomegalovirus in pediatric patients: toward personalized medicine. Future Virol 2015. [DOI: 10.2217/fvl.15.58] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Oxford KL, Dela Pena-Ponce MGA, Jensen K, Eberhardt MK, Spinner A, Van Rompay KK, Rigdon J, Mollan KR, Krishnan VV, Hudgens MG, Barry PA, De Paris K. The interplay between immune maturation, age, chronic viral infection and environment. IMMUNITY & AGEING 2015; 12:3. [PMID: 25991918 PMCID: PMC4436863 DOI: 10.1186/s12979-015-0030-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 04/24/2015] [Indexed: 11/10/2022]
Abstract
BACKGROUND The worldwide increase in life expectancy has been associated with an increase in age-related morbidities. The underlying mechanisms resulting in immunosenescence are only incompletely understood. Chronic viral infections, in particular infection with human cytomegalovirus (HCMV), have been suggested as a main driver in immunosenescence. Here, we propose that rhesus macaques could serve as a relevant model to define the impact of chronic viral infections on host immunity in the aging host. We evaluated whether chronic rhesus CMV (RhCMV) infection, similar to HCMV infection in humans, would modulate normal immunological changes in the aging individual by taking advantage of the unique resource of rhesus macaques that were bred and raised to be Specific Pathogen Free (SPF-2) for distinct viruses. RESULTS Our results demonstrate that normal age-related immunological changes in frequencies, activation, maturation, and function of peripheral blood cell lymphocytes in humans occur in a similar manner over the lifespan of rhesus macaques. The comparative analysis of age-matched SPF-2 and non-SPF macaques that were housed under identical conditions revealed distinct differences in certain immune parameters suggesting that chronic pathogen exposure modulated host immune responses. All non-SPF macaques were infected with RhCMV, suggesting that chronic RhCMV infection was a major contributor to altered immune function in non-SPF macaques, although a causative relationship was not established and outside the scope of these studies. Further, we showed that immunological differences between SPF-2 and non-SPF macaques were already apparent in adolescent macaques, potentially predisposing RhCMV-infected animals to age-related pathologies. CONCLUSIONS Our data validate rhesus macaques as a relevant animal model to study how chronic viral infections modulate host immunity and impact immunosenescence. Comparative studies in SPF-2 and non-SPF macaques could identify important mechanisms associated with inflammaging and thereby lead to new therapies promoting healthy aging in humans.
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Affiliation(s)
- Kristie L Oxford
- Center of Comparative Medicine, University of California, Davis, California USA
| | - Myra Grace A Dela Pena-Ponce
- Department of Microbiology and Immunology, University of North Carolina, Burnett-Womack Bldg, 160 Dental Circle, Chapel Hill, NC 27599-7292 USA
| | - Kara Jensen
- Department of Microbiology and Immunology, University of North Carolina, Burnett-Womack Bldg, 160 Dental Circle, Chapel Hill, NC 27599-7292 USA
| | - Meghan K Eberhardt
- Center of Comparative Medicine, University of California, Davis, California USA
| | - Abigail Spinner
- California National Primate Research Center, University of California, Davis, California USA
| | - Koen Ka Van Rompay
- California National Primate Research Center, University of California, Davis, California USA
| | - Joseph Rigdon
- Gillings School of Public Health, University of North Carolina, Chapel Hill, North Carolina USA
| | - Katie R Mollan
- Gillings School of Public Health, University of North Carolina, Chapel Hill, North Carolina USA.,Center for AIDS Research, University of North Carolina, Chapel Hill, North Carolina USA
| | - V V Krishnan
- Department of Pathology and Laboratory Medicine, University of California, Davis, California USA
| | - Michael G Hudgens
- Gillings School of Public Health, University of North Carolina, Chapel Hill, North Carolina USA.,Center for AIDS Research, University of North Carolina, Chapel Hill, North Carolina USA
| | - Peter A Barry
- Center of Comparative Medicine, University of California, Davis, California USA.,California National Primate Research Center, University of California, Davis, California USA
| | - Kristina De Paris
- Department of Microbiology and Immunology, University of North Carolina, Burnett-Womack Bldg, 160 Dental Circle, Chapel Hill, NC 27599-7292 USA.,Center for AIDS Research, University of North Carolina, Chapel Hill, North Carolina USA
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10
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Gibson L, Barysauskas CM, McManus M, Dooley S, Lilleri D, Fisher D, Srivastava T, Diamond DJ, Luzuriaga K. Reduced frequencies of polyfunctional CMV-specific T cell responses in infants with congenital CMV infection. J Clin Immunol 2015; 35:289-301. [PMID: 25712611 PMCID: PMC4366322 DOI: 10.1007/s10875-015-0139-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 02/04/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE CMV infection remains a priority for vaccine development. Vaccination of infants could modify congenital infection and provide lifetime immunity. Properties of CMV-specific T cells associated with control of viral replication in early life have not been fully defined. METHODS CMV-specific CD4 and CD8 T cell responses were investigated in infants with congenital CMV infection and compared to adults with primary or chronic infection. PBMC were stimulated with UL83 (pp65) or UL122 (IE-2) peptide pools then stained with antibodies to markers of T cell subset (CD4 or CD8), phenotype (CD45RA, CCR7), or function (MIP1β, CD107, IFNγ, IL2) for flow cytometry analysis. RESULTS Detection of CMV pp65-specific CD4 T cells was less common in infants than adults. Responder cells were primarily effector memory (EM, CD45RA-CCR7-) in adults, but mixed memory subsets in infants. Detection of CMV pp65-specific CD8 T cells did not differ between the groups, but infants had lower frequencies of total responding cells and of MIP1β- or CD107-expressing cells. Responder cells were EM or effector memory RA (CD45RA + CCR7-) in all groups. Polyfunctional T cells were less commonly detected in infants than adults. Responses to IE-2 were detected in adults but not infants. All infants had detectable circulating CMV DNA at initial study (versus 60 % of adults with primary infection) despite longer duration of CMV infection. CONCLUSIONS Reduced frequencies and altered functional profile of CMV-specific CD4 and CD8 T cell responses were detected in infants compared to adults, and were associated with persistent CMV DNA in peripheral blood.
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Affiliation(s)
- Laura Gibson
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, 01605, USA,
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11
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Xu J, Wu R, Xiang F, Kong Q, Hong J, Kang X. Diversified phenotype of antigen specific CD8+ T cells responding to the immunodominant epitopes of IE and pp65 antigens of human cytomegalovirus. Cell Immunol 2015; 295:105-11. [PMID: 25880101 DOI: 10.1016/j.cellimm.2015.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/21/2015] [Accepted: 03/25/2015] [Indexed: 10/23/2022]
Abstract
To study the cytomegalovirus (CMV)-specific CD8+ T cells in individuals with HLA A*1101, A*0201 and A*2402, our findings showed that peptide SK-10-2, KI-10 and KV-10 of CMV IE and pp65 antigens were immunodominant in 198 individuals with HLA A*1101, A*0201 and A*2402, the most frequent genotypes in Chinese. Interestingly, SK-10-2 induced the strongest T cell response to produce IFN-γ whereas the others did not induce prominent IFN-γ production despite they all induced remarkable T cell proliferation. The peptides induced different phenotypes including IFN-γ(high)TNF-α(low) and TNF-α(low)Foxp3(low). It suggests that only some of CMV-reactive CD8+ T cells are real protective IFN-γ(high) cytotoxic T cells.
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Affiliation(s)
- Jian Xu
- Department of Central Laboratory, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Rong Wu
- Department of Laboratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Fenfen Xiang
- Department of Laboratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Qianqian Kong
- Department of Laboratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jian Hong
- Department of Central Laboratory, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China; LifeTek, Co. Ltd., Suzhou, China
| | - Xiangdong Kang
- Department of Central Laboratory, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China; Department of Laboratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
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12
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Vγ9Vδ2-T lymphocytes have impaired antiviral function in small-for-gestational-age and preterm neonates. Cell Mol Immunol 2013; 10:253-60. [PMID: 23524656 DOI: 10.1038/cmi.2012.78] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Preterm and small-for-gestational-age (SGA) neonates are vulnerable groups that are susceptible to various microbial infections. Vγ9Vδ2-T cells are critical components of the host immune system and have been demonstrated to play an important role in the defense against viral infection in adults. However, the characteristics of Vγ9Vδ2-T cells in children, especially the preterm and SGA populations, are poorly understood. Here, we examined the frequency and antiviral function of Vγ9Vδ2-T cells in neonates, including preterm, SGA and full-term babies. When compared to adults, neonates had a significantly lower percentage of Vγ9Vδ2-T cells in the blood. Upon influenza virus stimulation, neonatal Vγ9Vδ2-T cells, especially from preterm and SGA babies, showed markedly decreased and delayed antiviral cytokine responses than those of adults. In addition, the antiviral responses of neonatal Vγ9Vδ2-T cells were positively correlated with gestational age and birth weight. Finally, a weaker expansion of Vγ9Vδ2-T cells by isopentenyl pyrophosphate (IPP) was shown in neonates than the expansion in adults. Our data suggest that the depressed antiviral activity and decreased frequency of Vγ9Vδ2-T cells may likely account for the high susceptibility to microbial infection in neonates, particularly in preterm and SGA babies. Improving Vγ9Vδ2-T-cell function of neonates may provide a new way to defend against virus infection.
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13
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Lidehäll AK, Engman ML, Sund F, Malm G, Lewensohn-Fuchs I, Ewald U, Tötterman TH, Karltorp E, Korsgren O, Eriksson BM. Cytomegalovirus-Specific CD4 and CD8 T Cell Responses in Infants and Children. Scand J Immunol 2013; 77:135-43. [DOI: 10.1111/sji.12013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Accepted: 10/27/2012] [Indexed: 11/29/2022]
Affiliation(s)
- A. K. Lidehäll
- Department of Immunology, Genetics and Pathology; Uppsala University; Uppsala; Sweden
| | - M.-L. Engman
- Department of Clinical Science, Intervention and Technology; Karolinska Institutet; Stockholm; Sweden
| | - F. Sund
- Department of Medical Sciences; Uppsala University; Uppsala; Sweden
| | - G. Malm
- Department of Clinical Science, Intervention and Technology; Karolinska Institutet; Stockholm; Sweden
| | - I. Lewensohn-Fuchs
- Division of Clinical Microbiology; Department of Laboratory Medicine; Karolinska University Hospital; Stockholm; Sweden
| | - U. Ewald
- Department of Women's and Children's Health; Uppsala University; Uppsala; Sweden
| | - T. H. Tötterman
- Department of Immunology, Genetics and Pathology; Uppsala University; Uppsala; Sweden
| | - E. Karltorp
- Cochlear Implant Clinic; Karolinska University Hospital; Stockholm; Sweden
| | - O. Korsgren
- Department of Immunology, Genetics and Pathology; Uppsala University; Uppsala; Sweden
| | - B.-M. Eriksson
- Department of Medical Sciences; Uppsala University; Uppsala; Sweden
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14
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Abstract
INTRODUCTION A primary maternal cytomegalovirus (CMV) during pregnancy causes newborn disease that includes hearing deficit and/or mental retardation. SOURCES OF DATA Relevant published literature. AREAS OF AGREEMENT There are no biologic obstacles to immunization against fetal/placental infection with CMV. AREAS OF UNCERTAINTY CMV vaccine trials may be difficult due to a lack of public awareness of CMV. Vaccine trials that use fetal infection as an endpoint will be prolonged, since vaccination will need to occur preconception. AREAS TIMELY FOR DEVELOPING RESEARCH Vaccines in preclinical development include antigens of the CMV gB glycoprotein and the gH/gL UL128, 130 and 131 pentameric complex. These antigens induce antibodies that block viral entry into fibroblasts and endothelial/epithelial cells. Vaccines immunogenic in animals include an inactivated virus with a wild-type UL131 gene, a DNA vaccine using a wild-type UL130 gene and peptide vaccines using peptides from UL130 and 131. CONCLUSIONS In spite of these potential obstacles, successful evaluation of CMV vaccines is possible.
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Affiliation(s)
- Stuart P Adler
- Department of Microbiology, Medical College of Virginia Campus/Virginia Commonwealth University, PO Box 163, Richmond, VA 23298, USA.
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dela Pena MG, Strelow L, Barry PA, Abel K. Use of specific-pathogen-free (SPF) rhesus macaques to better model oral pediatric cytomegalovirus infection. J Med Primatol 2012; 41:225-9. [PMID: 22620273 DOI: 10.1111/j.1600-0684.2012.00541.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Congenital human cytomegalovirus (HCMV) infection can result in lifelong neurological deficits. Seronegative pregnant woman often acquire primary HCMV from clinically asymptomatic, but HCMV-shedding children. METHODS Potential age-related differences in viral and immune parameters of primary RhCMV infection were examined in an oral rhesus CMV infection model in specific pathogen free macaques. RhCMV shedding was measured by real time PCR in plasma, saliva and urine. Immune parameters, including neutralizing and binding antibodies and RhCMV-specific T cell responses, were assessed in longitudinally collected blood samples. RESULTS The oral RhCMV infection model in infant SPF rhesus macaques demonstrated that (i) the susceptibility to oral RhCMV infection declines with age, and (ii) infant macaques shed RhCMV more persistently and at higher titers compared to adult macaques. (iii) CONCLUSIONS The oral infant RhCMV infection model appears to reflect viral pathogenesis in human HCMV-infected children. Larger studies are needed to define immune parameters associated with better control of RhCMV in adult compared to young animals.
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Affiliation(s)
- Myra G dela Pena
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC, USA
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16
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Polyfunctional T cells accumulate in large human cytomegalovirus-specific T cell responses. J Virol 2011; 86:1001-9. [PMID: 22072753 DOI: 10.1128/jvi.00873-11] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Large cytomegalovirus (CMV)-specific CD8 T-cell responses are observed in both young and, somewhat more often, old people. Frequent CMV reactivation is thought to exhaust these cells and render them dysfunctional so that larger numbers of them are needed to control CMV. Expansions of CMV-specific CD4 T cells are also seen but are less well studied. In this study, we examined the T-cell response to the dominant CMV pp65 and IE-1 antigens in healthy CMV-infected people across a wide age range (20 to 84 years) by using multicolor flow cytometry. CMV-specific T cells were characterized by the activation markers CD40 ligand (CD40L), interleukin-2 (IL-2), tumor necrosis factor alpha (TNF-α), and gamma interferon (IFN-γ) and the memory markers CD27 and CD45RA. The proportions of effector memory T cells increased in large responses, as did the proportions of polyfunctional CD8 (IFN-γ(+) IL-2(+/-) TNF-α(+)) and CD4 (CD40L(+/-) IFN-γ(+) IL-2(+) TNF-α(+)) T-cell subsets, while the proportion of naïve T cells decreased. The bigger the CD4 or CD8 T-cell response to pp65, the larger was the proportion of T cells with an advanced memory phenotype in the entire (including non-CMV-specific) T-cell compartment. In addition, the number of activation markers per cell correlated with the degree of T-cell receptor downregulation, suggesting increased antigen sensitivity in polyfunctional cells. In summary, our findings show that polyfunctional CMV-specific T cells were not superseded by dysfunctional cells, even in very large responses. At the same time, however, the memory subset composition of the entire T-cell compartment correlated with the size of the T-cell response to CMV pp65, confirming a strong effect of CMV infection on the immune systems of some, but not all, infected people.
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Baitsch L, Baumgaertner P, Devêvre E, Raghav SK, Legat A, Barba L, Wieckowski S, Bouzourene H, Deplancke B, Romero P, Rufer N, Speiser DE. Exhaustion of tumor-specific CD8⁺ T cells in metastases from melanoma patients. J Clin Invest 2011; 121:2350-60. [PMID: 21555851 DOI: 10.1172/jci46102] [Citation(s) in RCA: 636] [Impact Index Per Article: 48.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Accepted: 03/16/2011] [Indexed: 12/14/2022] Open
Abstract
In chronic viral infections, CD8⁺ T cells become functionally deficient and display multiple molecular alterations. In contrast, only little is known of self- and tumor-specific CD8⁺ T cells from mice and humans. Here we determined molecular profiles of tumor-specific CD8⁺ T cells from melanoma patients. In peripheral blood from patients vaccinated with CpG and the melanoma antigen Melan-A/MART-1 peptide, we found functional effector T cell populations, with only small but nevertheless significant differences in T cells specific for persistent herpesviruses (EBV and CMV). In contrast, Melan-A/MART-1-specific T cells isolated from metastases from patients with melanoma expressed a large variety of genes associated with T cell exhaustion. The identified exhaustion profile revealed extended molecular alterations. Our data demonstrate a remarkable coexistence of effector cells in circulation and exhausted cells in the tumor environment. Functional T cell impairment is mediated by inhibitory receptors and further molecular pathways, which represent potential targets for cancer therapy.
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Affiliation(s)
- Lukas Baitsch
- Clinical Tumor Immune-Biology Unit, Ludwig Institute for Cancer Research, Lausanne, Switzerland
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Muller WJ, Jones CA, Koelle DM. Immunobiology of herpes simplex virus and cytomegalovirus infections of the fetus and newborn. ACTA ACUST UNITED AC 2010; 6:38-55. [PMID: 20467462 DOI: 10.2174/157339510790231833] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Immunologic "immaturity" is often blamed for the increased susceptibility of newborn humans to infection, but the precise mechanisms and details of immunologic development remain somewhat obscure. Herpes simplex virus (HSV) and cytomegalovirus (CMV) are two of the more common severe infectious agents of the fetal and newborn periods. HSV infection in the newborn most commonly occurs after exposure to the virus during delivery, and can lead to a spectrum of clinical disease ranging from isolated skin-eye-mucous membrane infection to severe disseminated multiorgan disease, often including encephalitis. In contrast to HSV, clinically severe CMV infections early in life are usually acquired during the intrauterine period. These infections can result in a range of clinical disease, including hearing loss and neurodevelopmental delay. However, term newborns infected with CMV after delivery are generally asymptomatic, and older children and adults often acquire infection with HSV or CMV with either no or mild clinical symptoms. The reasons for these widely variable clinical presentations are not completely understood, but likely relate to developmental differences in immune responses.This review summarizes recent human and animal studies of the immunologic response of the fetus and newborn to these two infections, in comparison to the responses of older children and adults. The immunologic defense of the newborn against each virus is considered under the broader categories of (i) the placental barrier to infection, (ii) skin and mucosal barriers (including antimicrobial peptides), (iii) innate responses, (iv) humoral responses, and (v) cellular responses. A specific focus is made on recent studies of innate and cellular immunity to HSV and CMV.
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Affiliation(s)
- William J Muller
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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Eid AJ, Brown RA, Arthurs SK, Lahr BD, Eckel-Passow JE, Larson TS, Razonable RR. A prospective longitudinal analysis of cytomegalovirus (CMV)-specific CD4+ and CD8+ T cells in kidney allograft recipients at risk of CMV infection. Transpl Int 2009; 23:506-13. [DOI: 10.1111/j.1432-2277.2009.01017.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Age-dependent association between low frequency of CD27/CD28 expression on pp65 CD8+ T cells and cytomegalovirus replication after transplantation. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2009; 16:1429-38. [PMID: 19656991 DOI: 10.1128/cvi.00214-09] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this cross-sectional study of 42 solid organ transplant recipients, the association of human cytomegalovirus (HCMV) replication and age with the phenotype of the HCMV-specific CD8(+) T cells was analyzed by using the CMV pp65 HLA-A*0201 pentamer. A correlation between the proportion of CD28(-) HCMV-specific CD8(+) T cells and age was observed in patients without HCMV replication (r = 0.50; P = 0.02) but not in patients with HCMV replication (r = -0.05; P = 0.83), a finding which differs from that observed for total CD8(+) T cells. Within the group of patients younger than 50 years of age, patients with HCVM replication after transplantation had higher percentages of CD28(-) HCMV-specific CD8(+) T cells (85.6 compared with 58.7% for patients without HCMV replication; P = 0.004) and CD27(-) HCMV-specific CD8(+) T cells (90.7 compared with 68.8% for patients without HCMV replication; P = 0.03). However, in patients older than age 50 years, a high frequency of these two subpopulations was observed in patients both with and without previous HCMV replication (for CD28(-) HCMV-specific CD8(+) T cells, 84.4 and 80.9%, respectively [P = 0.39]; for CD27(-) HCMV-specific CD8(+) T cells 86.6 and 81.5%, respectively [P = 0.16]). In conclusion, the present study shows that in the group of recipients younger than age 50 years, HCMV replication after transplantation is associated with a high percentage of CD27(-) and CD28(-) HCMV-specific CD8(+) T cells. These results suggest that the increased percentage of CD27(-) or CD28(-) HCMV-specific subsets can be considered a biomarker of HCMV replication in solid organ transplant recipients younger than age 50 years but not in older patients. Further studies are necessary to define the significance of these changes in HCMV-associated clinical complications posttransplantation.
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Guérin V, Dalle JH, Pédron B, Ouachée-Chardin M, Yakouben K, Baruchel A, Sterkers G. Cellular immune parameters associated with spontaneous control of CMV in children who underwent transplantation. Bone Marrow Transplant 2009; 45:442-9. [DOI: 10.1038/bmt.2009.179] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Huang S, Dunkley-Thompson J, Tang Y, Macklin EA, Steel-Duncan J, Singh-Minott I, Ryland EG, Smikle M, Walker BD, Christie CDC, Feeney ME. Deficiency of HIV-Gag-specific T cells in early childhood correlates with poor viral containment. THE JOURNAL OF IMMUNOLOGY 2008; 181:8103-11. [PMID: 19018003 DOI: 10.4049/jimmunol.181.11.8103] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Perinatal HIV infection is characterized by a sustained high-level viremia and a high risk of rapid progression to AIDS, indicating a failure of immunologic containment of the virus. We hypothesized that age-related differences in the specificity or function of HIV-specific T cells may influence HIV RNA levels and clinical outcome following perinatal infection. In this study, we defined the HIV epitopes targeted by 76 pediatric subjects (47 HIV infected and 29 HIV exposed, but uninfected), and assessed the ability of HIV-specific CD8 and CD4 T cells to degranulate and produce IFN-gamma, TNF-alpha, and IL-2. No responses were detected among HIV-uninfected infants, whereas responses among infected subjects increased in magnitude and breadth with age. Gag-specific responses were uncommon during early infancy, and their frequency was significantly lower among children younger than 24 mo old (p = 0.014). Importantly, Gag responders exhibited significantly lower HIV RNA levels than nonresponders (log viral load 5.8 vs 5.0; p = 0.005). Both the total and Gag-specific T cell frequency correlated inversely with viral load after correction for age, whereas no relationship with targeting of other viral proteins was observed. Functional assessment of HIV-specific T cells by multiparameter flow cytometry revealed that polyfunctional CD8 cells were less prevalent in children before 24 mo of age, and that HIV-specific CD4 cell responses were of universally low frequency among antiretroviral-naive children and absent in young infants. These cross-sectional data suggest that qualitative differences in the CD8 response, combined with a deficiency of HIV-specific CD4 cells, may contribute to the inability of young infants to limit replication of HIV.
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Affiliation(s)
- Sihong Huang
- Partners AIDS Research Center and Infectious Disease Division, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02115, USA
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Miles DJC, van der Sande M, Jeffries D, Kaye S, Ojuola O, Sanneh M, Cox M, Palmero MS, Touray ES, Waight P, Rowland-Jones S, Whittle H, Marchant A. Maintenance of large subpopulations of differentiated CD8 T-cells two years after cytomegalovirus infection in Gambian infants. PLoS One 2008; 3:e2905. [PMID: 18682836 PMCID: PMC2483415 DOI: 10.1371/journal.pone.0002905] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2008] [Accepted: 07/15/2008] [Indexed: 11/19/2022] Open
Abstract
Background In a previously published study, we found that large differentiated subpopulations of CD8 T-cells emerged rapidly after CMV infection in young infants and persisted throughout the following year. Here we describe a follow-up study conducted on the same infants to establish whether the differentiated subpopulations continued through the second year post-infection. Methodology / Principal Findings CMV-specific cells identified using tetramers remained more activated and differentiated than the overall CD8 population. The large subpopulation of differentiated cytotoxic (CD28−CD62L−Bcl-2lowCD95+perforin+) cells that emerged rapidly after infection remained stable after two years. No similar subpopulation was found in CMV-uninfected infants indicating that two years after infection, CMV remained a major factor in driving CD8 T-cell differentiation. Although markers of activation (CD45R0 and HLA-D) declined throughout the first year, HLA-D expression continued to decline during the second year and CD45R0 expression increased slightly. The age-related increase in IFNγ response observed during the first year continued but was non-significant during the second year, indicating that the rate of functional improvement had slowed substantially. Conclusions / Significance The large differentiated subpopulations of CD8 T-cells that had emerged immediately after CMV infection persisted through the second year post-infection, while levels of activation and functional capacity remained fairly constant.
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Efficient generation of human alloantigen-specific CD4+ regulatory T cells from naive precursors by CD40-activated B cells. Blood 2008; 112:2554-62. [PMID: 18599794 DOI: 10.1182/blood-2008-04-152041] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
CD4(+)CD25(+)Foxp3(+) regulatory T cells (Treg) play an important role in the induction and maintenance of immune tolerance. Although adoptive transfer of bulk populations of Treg can prevent or treat T cell-mediated inflammatory diseases and transplant allograft rejection in animal models, optimal Treg immunotherapy in humans would ideally use antigen-specific rather than polyclonal Treg for greater specificity of regulation and avoidance of general suppression. However, no robust approaches have been reported for the generation of human antigen-specific Treg at a practical scale for clinical use. Here, we report a simple and cost-effective novel method to rapidly induce and expand large numbers of functional human alloantigen-specific Treg from antigenically naive precursors in vitro using allogeneic nontransformed B cells as stimulators. By this approach naive CD4(+)CD25(-) T cells could be expanded 8-fold into alloantigen-specific Treg after 3 weeks of culture without any exogenous cytokines. The induced alloantigen-specific Treg were CD45RO(+)CCR7(-) memory cells, and had a CD4(high), CD25(+), Foxp3(+), and CD62L (L-selectin)(+) phenotype. Although these CD4(high)CD25(+)Foxp3(+) alloantigen-specific Treg had no cytotoxic capacity, their suppressive function was cell-cell contact dependent and partially relied on cytotoxic T lymphocyte antigen-4 expression. This approach may accelerate the clinical application of Treg-based immunotherapy in transplantation and autoimmune diseases.
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Heo J, Petheram S, Demmler G, Murph JR, Adler SP, Bale J, Sparer TE. Polymorphisms within human cytomegalovirus chemokine (UL146/UL147) and cytokine receptor genes (UL144) are not predictive of sequelae in congenitally infected children. Virology 2008; 378:86-96. [PMID: 18556037 DOI: 10.1016/j.virol.2008.05.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Revised: 03/31/2008] [Accepted: 05/06/2008] [Indexed: 11/26/2022]
Abstract
Human cytomegalovirus (HCMV) viral chemokine, UL146, and TNF alpha-like receptor UL144 genes show a high degree of hypervariability in clinical isolates. These proteins are predicted to be immune modulators and may contribute to the pathogenesis of HCMV infections. We analyzed the UL146 and UL144 genetic variation of 51 HCMV isolates from congenitally infected children and 13 isolates from children in childcare. There was no statistically significant correlation between UL146 and UL144 genotypes and HCMV disease and/or sequelae. However, there were some groups that had a relatively large proportion of asymptomatic outcomes. These included UL146 group 8 (7/8 asymptomatic) and UL146 group 10 (3/3 asymptomatic). UL144 group B had 11/15 (73%) asymptomatic. UL146 and UL144 genes remained stable in serial isolates from children in daycare for intervals up to three years. These results indicate that most UL146 and UL144 genotypes do not predict clinical sequelae following congenital HCMV infections.
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Affiliation(s)
- Jinho Heo
- The University of Tennessee, Department of Microbiology, 1414 Cumberland Ave., Knoxville, TN 37996, USA
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26
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Miles DJC, Sanneh M, Holder B, Crozier S, Nyamweya S, Touray ES, Palmero MS, Zaman SMA, Rowland-Jones S, van der Sande M, Whittle H. Cytomegalovirus infection induces T-cell differentiation without impairing antigen-specific responses in Gambian infants. Immunology 2008; 124:388-400. [PMID: 18194268 DOI: 10.1111/j.1365-2567.2007.02787.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Cytomegalovirus (CMV) infection induces profound differentiation of T cells, and is associated with impaired responses to other immune challenges. We therefore considered whether CMV infection and the consequent T-cell differentiation in Gambian infants was associated with impaired specific responses to measles vaccination or polyclonal responses to the superantigen staphylococcal enterotoxin B (SEB). While the concentration of undifferentiated (CD27(+) CD28(+) CCR7(+)) T-cells in peripheral blood was unaffected by CMV, there was a large increase in differentiated (CD28(-) CD57(+)) CD8 T-cells and a smaller increase in differentiated CD4 cells. One week post-vaccination, the CD4 cell interferon-gamma (IFN-gamma) response to measles was lower among CMV-infected infants, but there were no other differences between the cytokine responses, or between the cytokine or proliferative responses 4 months post-vaccination. However, the CD8 T cells of CMV-infected infants proliferated more in response to SEB and the antibody response to measles correlated with the IFN-gamma response to CMV, indicating that CMV infection actually enhances some immune responses in infancy.
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Affiliation(s)
- David J C Miles
- Medical Research Council Laboratories Gambia, Banjul, The Gambia.
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Kuerten S, Nowacki TM, Kleen TO, Asaad RJ, Lehmann PV, Tary-Lehmann M. Dissociated production of perforin, granzyme B, and IFN-gamma by HIV-specific CD8(+) cells in HIV infection. AIDS Res Hum Retroviruses 2008; 24:62-71. [PMID: 18275349 DOI: 10.1089/aid.2007.0125] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
CD8(+) T cells play a crucial role in the control of viral infections such as HIV. The functional characterization of HIV-specific CD8(+) T cells has so far been largely restricted to studies of IFN-gamma. The TCR-triggered release of the effector molecules perforin (PFN) and granzyme B (GzB), however, is thought to be a central pathway for the destruction of virus-infected target cells by CD8(+) effector T cells. Here we would like to address two major findings. On the one hand we propose that ex vivo measurements of PFN and GzB secretion via ELISPOT may permit the distinction between in vivo resting versus activated CD8(+) memory T cells in healthy and HIV-infected individuals. Therefore, extending the present standard of IFN-gamma measurements to the analysis of PFN and GzB release in functional T cell assays will provide new insights into CD8(+) effector T cell functions. It should enable the evaluation of therapeutic vaccination efficacy by its ability to reactivate and convert IFN-gamma-positive, but GzB- and PFN-negative memory CD8(+) T cells into PFN/GzB-secreting effector cells. On the other hand, we report on a frequent ex vivo dissociation of the HIV peptide-induced secretion of PFN and GzB in chronic HIV infection underlining CD8(+) effector T cell diversity in this disease--an aspect that also has to be accounted for in immune monitoring approaches.
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Affiliation(s)
- Stefanie Kuerten
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106
- Insitut I fuer Anatomie, University of Cologne, Cologne, Germany
| | - Tobias M. Nowacki
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106
| | | | - Robert J. Asaad
- Center for AIDS Research, Case Western Reserve University, Cleveland, Ohio 44106
| | - Paul V. Lehmann
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106
- Cellular Technology Limited, Cleveland, Ohio, 44106
| | - Magdalena Tary-Lehmann
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106
- Cellular Technology Limited, Cleveland, Ohio, 44106
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Adler SP. Human CMV vaccine trials: what if CMV caused a rash? J Clin Virol 2007; 41:231-6. [PMID: 18096431 DOI: 10.1016/j.jcv.2007.11.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 10/12/2007] [Accepted: 11/05/2007] [Indexed: 11/29/2022]
Abstract
There are no apparent biologic obstacles to immunization against fetal/placental infection with cytomegalovirus (CMV), and vaccine candidates have been developed. The major obstacles for a human CMV vaccine are difficulties associated with the design and execution of efficacy trials. These trials will be prolonged with difficulties in recruiting subjects, and hampered by several factors: First is a lack of public awareness of CMV, making recruitment into vaccine trials difficult. Second is that trials using fetal infection as an endpoint will be prolonged since vaccine administration must occur preconception. Third, behavioral changes by subjects will affect infection rates, and controls for behavioral changes will have to be in place in any clinical trial. Fourth, not all women are at equal risk for CMV infections. High risk women may become infected by contact with young children or via sexual activity. Thus, the mode of acquisition may be a confounding variable in vaccine efficacy trials. In spite of these potential obstacles, successful evaluation of CMV vaccines is possible and likely when considered against similar obstacles encountered by several other recently licensed vaccines.
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Affiliation(s)
- Stuart P Adler
- Department of Pediatrics, Medical College of Virginia Campus, Virginia Commonwealth University, Box 163, Richmond, VA 23298, USA.
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Miles DJC, van der Sande M, Jeffries D, Kaye S, Ismaili J, Ojuola O, Sanneh M, Touray ES, Waight P, Rowland-Jones S, Whittle H, Marchant A. Cytomegalovirus infection in Gambian infants leads to profound CD8 T-cell differentiation. J Virol 2007; 81:5766-76. [PMID: 17376923 PMCID: PMC1900274 DOI: 10.1128/jvi.00052-07] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cytomegalovirus (CMV) infection is endemic in Gambian infants, with 62% infected by 3 months and 85% by 12 months of age. We studied the CD8 T-cell responses of infants to CMV following primary infection. CMV-specific CD8 T cells, identified with tetramers, showed a fully differentiated phenotype (CD28(-) CD62L(-) CD95(+) perforin(+) granzyme A(+) Bcl-2(low)). Strikingly, the overall CD8 T-cell population developed a similar phenotype following CMV infection, which persisted for at least 12 months. In contrast, primary infection was accompanied by up-regulation of markers of activation (CD45R0 and HLA-D) on both CMV-specific cells and the overall CD8 T-cell population and division (Ki-67) of specific cells, but neither pattern persisted. At 12 months of age, the CD8 T-cell population of CMV-infected infants was more differentiated than that of uninfected infants. Although the subpopulation of CMV-specific cells remained constant, the CMV peptide-specific gamma interferon response was lower in younger infants and increased with age. As the CD8 T-cell phenotype induced by CMV is indicative of immune dysfunction in the elderly, the existence of a similar phenotype in large numbers of Gambian infants raises the question of whether CMV induces a similarly deleterious effect.
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Randolph DA, Lewis DB. Transient deficiencies of T-cell-mediated immunity in the neonate. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2006; 582:55-69. [PMID: 16802619 DOI: 10.1007/0-387-33026-7_6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- David A Randolph
- Department of Paediatrics and Division of Immunology, Stanford University, School of Medicine, CA 94305-5164, USA
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Schleiss MR, Heineman TC. Progress toward an elusive goal: current status of cytomegalovirus vaccines. Expert Rev Vaccines 2006; 4:381-406. [PMID: 16026251 DOI: 10.1586/14760584.4.3.381] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Although infection with human cytomegalovirus (CMV) is ubiquitous and generally asymptomatic in most individuals, certain patient populations are at high risk for CMV-associated disease. These include HIV-infected individuals with AIDS, transplant patients, and newborn infants with congenital CMV infection. Immunity to CMV infection, both in the transplant setting and among women of childbearing age, plays a vital role in the control of CMV-induced injury and disease. Although immunity induced by CMV infection is not completely protective against reinfection, there is nevertheless a sound basis on which to believe that vaccination could help control CMV disease in high-risk patient populations. Evidence from several animal models of CMV infection indicates that a variety of vaccine strategies are capable of inducing immune responses sufficient to protect against CMV-associated illness following viral challenge. Vaccination has also proven effective in improving pregnancy outcomes following CMV challenge of pregnant guinea pigs, providing a 'proof-of-principle' relevant to human clinical trials of CMV vaccines. Although there are no licensed vaccines currently available for human CMV, progress toward this goal has been made, as evidenced by ongoing clinical trial testing of a number of immunization strategies. CMV vaccines currently in various stages of preclinical and clinical testing include: protein subunit vaccines; DNA vaccines; vectored vaccines using viral vectors, such as attenuated pox- and alphaviruses; peptide vaccines; and live attenuated vaccines. This review summarizes some of the obstacles that must be overcome in development of a CMV vaccine, and provides an overview of the current state of preclinical and clinical trial evaluation of vaccines for this important public health problem.
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Affiliation(s)
- Mark R Schleiss
- University of Minnesota School of Medicine, 420 Delaware Street SE, MMC 296, Minneapolis, MN 55455, USA.
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Holland MJ, Faal N, Sarr I, Joof H, Laye M, Cameron E, Pemberton-Pigott F, Dockrell HM, Bailey RL, Mabey DCW. The frequency of Chlamydia trachomatis major outer membrane protein-specific CD8+ T lymphocytes in active trachoma is associated with current ocular infection. Infect Immun 2006; 74:1565-72. [PMID: 16495527 PMCID: PMC1418621 DOI: 10.1128/iai.74.3.1565-1572.2006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Chlamydia-specific cytotoxic T lymphocytes are able to control model infections but may be implicated in disease pathogenesis. HLA-A2 peptide tetramers to Chlamydia trachomatis major outer membrane protein 258-266 (MOMP258-266) and MOMP260-268 were used to characterize HLA class I-restricted CD8+ T cells in Gambian children aged 4 to 15 years with clinical signs of active trachoma and/or infection with C. trachomatis. The frequencies of circulating HLA-A2 tetramer binding cells (TBC) were determined in whole blood samples by flow cytometric analysis. Initial screening of subjects with an anti-HLA-A2 antibody confirmed the presence of either HLA-A2 or HLA-A28. These were subsequently further divided by molecular subtyping. The C. trachomatis-specific HLA-A2 peptide tetramers were able to bind T cells with receptors from subjects which were restricted by either the HLA-A2 or the HLA-A28 restriction element. In this population, the median value of C. trachomatis-specific CD8+ T cells was 0.02%, with frequencies of up to 3.71% of CD8+ T cells reactive with a single tetramer in a minority of subjects. TBC were detected more often in subjects who were infected at the ocular surface, and their presence was associated with infection episodes of longer duration. Detection of C. trachomatis-specific TBC was not associated with the presence of disease or with the estimated load of ocular C. trachomatis infection at the time of sample collection. High frequencies of C. trachomatis-specific cells did not predict subsequent appearance or resolution of the clinical disease signs of active trachoma.
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Lewis DB, Gern JE, Hill HR, Friedlander SL, La Pine TR, Lemanske RF, Stiehm ER. Newborn immunology: relevance to the clinician. Curr Probl Pediatr Adolesc Health Care 2006; 36:189-204. [PMID: 16631097 DOI: 10.1016/j.cppeds.2005.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- David B Lewis
- Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA, USA
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Sylwester AW, Mitchell BL, Edgar JB, Taormina C, Pelte C, Ruchti F, Sleath PR, Grabstein KH, Hosken NA, Kern F, Nelson JA, Picker LJ. Broadly targeted human cytomegalovirus-specific CD4+ and CD8+ T cells dominate the memory compartments of exposed subjects. ACTA ACUST UNITED AC 2006; 202:673-85. [PMID: 16147978 PMCID: PMC2212883 DOI: 10.1084/jem.20050882] [Citation(s) in RCA: 1023] [Impact Index Per Article: 56.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Human cytomegalovirus (HCMV) infections of immunocompetent hosts are characterized by a dynamic, life-long interaction in which host immune responses, particularly of T cells, restrain viral replication and prevent disease but do not eliminate the virus or preclude transmission. Because HCMV is among the largest and most complex of known viruses, the T cell resources committed to maintaining this balance have never been characterized completely. Here, using cytokine flow cytometry and 13,687 overlapping 15mer peptides comprising 213 HCMV open reading frames (ORFs), we found that 151 HCMV ORFs were immunogenic for CD4(+) and/or CD8(+) T cells, and that ORF immunogenicity was influenced only modestly by ORF expression kinetics and function. We further documented that total HCMV-specific T cell responses in seropositive subjects were enormous, comprising on average approximately 10% of both the CD4(+) and CD8(+) memory compartments in blood, whereas cross-reactive recognition of HCMV proteins in seronegative individuals was limited to CD8(+) T cells and was rare. These data provide the first glimpse of the total human T cell response to a complex infectious agent and will provide insight into the rules governing immunodominance and cross-reactivity in complex viral infections of humans.
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Affiliation(s)
- Andrew W Sylwester
- Vaccine and Gene Therapy Institute, Department of Pathology, Oregon Health & Science University, Beaverton, 97006, USA
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Abstract
Human cytomegalovirus (HCMV) can be transmitted through breast milk to neonates. Although healthy full-term infants rarely develop symptoms of CMV infection; premature or low-birth-weight infants can experience symptomatic infection that is occasionally severe. There is limited information on the long-term effects of postnatal CMV infection in premature infants, suggesting that these infants do not develop cognitive function delays or hearing loss, although those with intrapartum infection do. Readily available methods of treating breast milk to inactivate the CMV either diminish the immunologic and nutritive benefits of breast milk or incompletely inactivate the virus. This review considers the data on measuring CMV in breast milk, the recent clinical studies on CMV transmission via breast milk, reported methods of inactivation of CMV in breast milk, and immunologic factors that may play a role in transmission. CMV-IVIG treatment needs further evaluation but appears promising. Recommendations are made to help address the issue of CMV transmission to premature infants in clinical practice in the neonatal intensive care unit (NICU).
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Abstract
Infections with intracellular pathogens are often more severe or more prolonged in young infants suggesting that T cell-mediated immune responses are different in early life. Whereas neonatal immune responses have been quite extensively studied in murine models, studies of T cell-mediated immunity in human newborns and infants are scarce. Qualitative and quantitative differences when compared with adult immune responses have been observed but on the other hand mature responses to certain vaccines and infectious pathogens were demonstrated during the postnatal period and even during foetal life. Herein, we review the evidence suggesting that under appropriate conditions of stimulation, protective T cell-mediated immune responses could be induced by vaccines in early life.
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Affiliation(s)
- A Marchant
- Institute for Medical Immunology, Université Libre de Bruxelles, Gosselies, Belgium.
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Sidorchuk A, Wickman M, Pershagen G, Lagarde F, Linde A. Cytomegalovirus infection and development of allergic diseases in early childhood: interaction with EBV infection? J Allergy Clin Immunol 2005; 114:1434-40. [PMID: 15577849 DOI: 10.1016/j.jaci.2004.08.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Chronic replication of cytomegalovirus and EBV in early life may affect the immune system and play a role in the development of allergy in children. OBJECTIVE To assess the relation between cytomegalovirus infection and allergic disorders in children, including a possible interaction with EBV infection. METHODS From a prospective birth cohort study in Stockholm, on factors of importance for development of allergy, 2581 four-year-old children were enrolled. The classification of allergic diseases was based on questionnaire answers and determination of IgE antibodies to common airborne and food allergens. IgG to cytomegalovirus was determined by a commercial ELISA and to EBV by indirect immunofluorescence. RESULTS A total of 1191 (46%) children were cytomegalovirus-seropositive. There were no significant associations between seropositivity to cytomegalovirus and allergic manifestations, such as bronchial asthma, suspected allergic rhinitis, or atopic dermatitis. Seropositivity to cytomegalovirus alone, ie, without seropositivity to EBV, was related to IgE antibodies to airborne and food allergens (adjusted odds ratio, 1.8; 95% CI, 1.2-2.9). An antagonism between cytomegalovirus and EBV in relation to sensitization to airborne and food allergens was suggested ( P = .05). CONCLUSION The study does not support the hypothesis that previous cytomegalovirus infection plays an important role in the pathogenesis of bronchial asthma, suspected allergic rhinitis, or atopic dermatitis in children. However, in the absence of EBV infection, cytomegalovirus infection may be related to sensitization to airborne and food allergens.
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Gandhi MK, Khanna R. Human cytomegalovirus: clinical aspects, immune regulation, and emerging treatments. THE LANCET. INFECTIOUS DISEASES 2004; 4:725-38. [PMID: 15567122 DOI: 10.1016/s1473-3099(04)01202-2] [Citation(s) in RCA: 387] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
After initial infection, human cytomegalovirus remains in a persistent state with the host. Immunity against the virus controls replication, although intermitent viral shedding can still take place in the seropositive immunocompetent person. Replication of cytomegalovirus in the absence of an effective immune response is central to the pathogenesis of disease. Therefore, complications are primarily seen in individuals whose immune system is immature, or is suppressed by drug treatment or coinfection with other pathogens. Although our increasing knowledge of the host-virus relationship has lead to the development of new pharmacological strategies for cytomegalovirus-associated infections, these strategies all have limitations-eg, drug toxicities, development of resistance, poor oral bioavailability, and low potency. Immune-based therapies to complement pharmacological strategies for the successful treatment of virus-associated complications should be prospectively investigated.
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Affiliation(s)
- Maher K Gandhi
- Tumour Immunology Laboratory at the Queensland Institute of Medical Research, Brisbane, Australia
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