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Clever S, Schünemann LM, Armando F, Meyer zu Natrup C, Tuchel T, Tscherne A, Ciurkiewicz M, Baumgärtner W, Sutter G, Volz A. Protective MVA-ST Vaccination Robustly Activates T Cells and Antibodies in an Aged-Hamster Model for COVID-19. Vaccines (Basel) 2024; 12:52. [PMID: 38250865 PMCID: PMC10819389 DOI: 10.3390/vaccines12010052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/24/2023] [Accepted: 12/31/2023] [Indexed: 01/23/2024] Open
Abstract
Aging is associated with a decline in immune system functionality. So-called immunosenescence may impair the successful vaccination of elderly people. Thus, improved vaccination strategies also suitable for an aged immune system are required. Modified Vaccinia virus Ankara (MVA) is a highly attenuated and replication-deficient vaccinia virus that has been established as a multipurpose viral vector for vaccine development against various infections. We characterized a recombinant MVA expressing a prefusion-stabilized version of SARS-CoV-2 S protein (MVA-ST) in an aged-hamster model for COVID-19. Intramuscular MVA-ST immunization resulted in protection from disease and severe lung pathology. Importantly, this protection was correlated with a potent activation of SARS-CoV-2 specific T-cells and neutralizing antibodies. Our results suggest that MVA vector vaccines merit further evaluation in preclinical models to contribute to future clinical development as candidate vaccines in elderly people to overcome the limitations of age-dependent immunosenescence.
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Affiliation(s)
- Sabrina Clever
- Institute of Virology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (S.C.); (L.-M.S.); (C.M.z.N.)
| | - Lisa-Marie Schünemann
- Institute of Virology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (S.C.); (L.-M.S.); (C.M.z.N.)
| | - Federico Armando
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany (W.B.)
- Pathology Unit, Department of Veterinary Science, University of Parma, 43121 Parma, Italy
| | - Christian Meyer zu Natrup
- Institute of Virology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (S.C.); (L.-M.S.); (C.M.z.N.)
| | - Tamara Tuchel
- Institute of Virology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (S.C.); (L.-M.S.); (C.M.z.N.)
| | - Alina Tscherne
- Division of Virology, Department of Veterinary Sciences, LMU Munich, 80539 Munich, Germany; (A.T.); (G.S.)
| | - Malgorzata Ciurkiewicz
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany (W.B.)
| | - Wolfgang Baumgärtner
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany (W.B.)
| | - Gerd Sutter
- Division of Virology, Department of Veterinary Sciences, LMU Munich, 80539 Munich, Germany; (A.T.); (G.S.)
| | - Asisa Volz
- Institute of Virology, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (S.C.); (L.-M.S.); (C.M.z.N.)
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2
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Reuschl AK, Mesner D, Shivkumar M, Whelan MVX, Pallett LJ, Guerra-Assunção JA, Madansein R, Dullabh KJ, Sigal A, Thornhill JP, Herrera C, Fidler S, Noursadeghi M, Maini MK, Jolly C. HIV-1 Vpr drives a tissue residency-like phenotype during selective infection of resting memory T cells. Cell Rep 2022; 39:110650. [PMID: 35417711 PMCID: PMC9350556 DOI: 10.1016/j.celrep.2022.110650] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 02/23/2022] [Accepted: 03/17/2022] [Indexed: 12/03/2022] Open
Abstract
HIV-1 replicates in CD4+ T cells, leading to AIDS. Determining how HIV-1 shapes its niche to create a permissive environment is central to informing efforts to limit pathogenesis, disturb reservoirs, and achieve a cure. A key roadblock in understanding HIV-T cell interactions is the requirement to activate T cells in vitro to make them permissive to infection. This dramatically alters T cell biology and virus-host interactions. Here we show that HIV-1 cell-to-cell spread permits efficient, productive infection of resting memory T cells without prior activation. Strikingly, we find that HIV-1 infection primes resting T cells to gain characteristics of tissue-resident memory T cells (TRM), including upregulating key surface markers and the transcription factor Blimp-1 and inducing a transcriptional program overlapping the core TRM transcriptional signature. This reprogramming is driven by Vpr and requires Vpr packaging into virions and manipulation of STAT5. Thus, HIV-1 reprograms resting T cells, with implications for viral replication and persistence.
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Affiliation(s)
- Ann-Kathrin Reuschl
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK.
| | - Dejan Mesner
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK
| | - Maitreyi Shivkumar
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK
| | - Matthew V X Whelan
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK
| | - Laura J Pallett
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK
| | | | - Rajhmun Madansein
- Department of Cardiothoracic Surgery, University of KwaZulu-Natal, Durban 4091, South Africa; Centre for the AIDS Programme of Research in South Africa, Durban 4091, South Africa
| | - Kaylesh J Dullabh
- Department of Cardiothoracic Surgery, University of KwaZulu-Natal, Durban 4091, South Africa
| | - Alex Sigal
- Africa Health Research Institute, Durban 4001, South Africa; School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban 4091, South Africa; Max Planck Institute for Infection Biology, 10117 Berlin, Germany
| | - John P Thornhill
- Peter Medawar Building for Pathogen Research, Nuffield Department of Medicine, University of Oxford, Oxford OX1 3XY, UK; Department of Infectious Disease, Faculty of Medicine, Imperial College, London W2 1NY, UK
| | - Carolina Herrera
- Department of Infectious Disease, Faculty of Medicine, Imperial College, London W2 1NY, UK
| | - Sarah Fidler
- Department of Infectious Disease, Faculty of Medicine, Imperial College, London W2 1NY, UK; Imperial College NIHR Biomedical Research Centre, London W2 1NY, UK
| | - Mahdad Noursadeghi
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK
| | - Mala K Maini
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK
| | - Clare Jolly
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK.
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3
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Lentiviral Nef Proteins Differentially Govern the Establishment of Viral Latency. J Virol 2022; 96:e0220621. [PMID: 35266804 DOI: 10.1128/jvi.02206-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Despite the clinical importance of latent human immunodeficiency virus type 1 (HIV-1) infection, our understanding of the biomolecular processes involved in HIV-1 latency control is still limited. This study was designed to address whether interactions between viral proteins, specifically HIV Nef, and the host cell could affect latency establishment. The study was driven by three reported observations. First, early reports suggested that human immunodeficiency virus type 2 (HIV-2) infection in patients produces a lower viral RNA/DNA ratio than HIV-1 infection, potentially indicating an increased propensity of HIV-2 to produce latent infection. Second, Nef, an early viral gene product, has been shown to alter the activation state of infected cells in a lentiviral lineage-dependent manner. Third, it has been demonstrated that the ability of HIV-1 to establish latent infection is a function of the activation state of the host cell at the time of infection. Based on these observations, we reasoned that HIV-2 Nef may have the ability to promote latency establishment. We demonstrate that HIV-1 latency establishment in T cell lines and primary T cells is indeed differentially modulated by Nef proteins. In the context of an HIV-1 backbone, HIV-1 Nef promoted active HIV-1 infection, while HIV-2 Nef strongly promoted latency establishment. Given that Nef represents the only difference in these HIV-1 vectors and is known to interact with numerous cellular factors, these data add support to the idea that latency establishment is a host cell-virus interaction phenomenon, but they also suggest that the HIV-1 lineage may have evolved mechanisms to counteract host cell suppression. IMPORTANCE Therapeutic attempts to eliminate the latent HIV-1 reservoir have failed, at least in part due to our incomplete biomolecular understanding of how latent HIV-1 infection is established and maintained. We here address the fundamental question of whether all lentiviruses actually possess a similar capacity to establish latent infections or whether there are differences between the lentiviral lineages driving differential latency establishment that could be exploited to develop improved latency reversal agents. Research investigating the viral RNA/DNA ratio in HIV-1 and HIV-2 patients could suggest that HIV-2 indeed has a much higher propensity to establish latent infections, a trait that we found, at least in part, to be attributable to the HIV-2 Nef protein. Reported Nef-mediated effects on host cell activation thus also affect latency establishment, and HIV-1 vectors that carry different lentiviral nef genes should become key tools to develop a better understanding of the biomolecular basis of HIV-1 latency establishment.
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Cho YK, Kim JE, Lee J. Impact of HIV-1 subtypes on gross deletion in the nef gene after Korean Red Ginseng treatment. J Ginseng Res 2022; 46:731-737. [PMID: 36312730 PMCID: PMC9597433 DOI: 10.1016/j.jgr.2022.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 11/29/2022] Open
Abstract
Background Methods Results Conclusion
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5
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Snetkov X, Haider T, Mesner D, Groves N, van Engelenburg SB, Jolly C. A Conserved Tryptophan in the Envelope Cytoplasmic Tail Regulates HIV-1 Assembly and Spread. Viruses 2022; 14:v14010129. [PMID: 35062333 PMCID: PMC8778169 DOI: 10.3390/v14010129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 01/07/2022] [Indexed: 12/14/2022] Open
Abstract
The HIV-1 envelope (Env) is an essential determinant of viral infectivity, tropism and spread between T cells. Lentiviral Env contain an unusually long 150 amino acid cytoplasmic tail (EnvCT), but the function of the EnvCT and many conserved domains within it remain largely uncharacterised. Here, we identified a highly conserved tryptophan motif at position 757 (W757) in the LLP-2 alpha helix of the EnvCT as a key determinant for HIV-1 replication and spread between T cells. Alanine substitution at this position potently inhibited HIV-1 cell–cell spread (the dominant mode of HIV-1 dissemination) by preventing recruitment of Env and Gag to sites of cell–cell contact, inhibiting virological synapse (VS) formation and spreading infection. Single-molecule tracking and super-resolution imaging showed that mutation of W757 dysregulates Env diffusion in the plasma membrane and increases Env mobility. Further analysis of Env function revealed that W757 is also required for Env fusion and infectivity, which together with reduced VS formation, result in a potent defect in viral spread. Notably, W757 lies within a region of the EnvCT recently shown to act as a supporting baseplate for Env. Our data support a model in which W757 plays a key role in regulating Env biology, modulating its temporal and spatial recruitment to virus assembly sites and regulating the inherent fusogenicity of the Env ectodomain, thereby supporting efficient HIV-1 replication and spread.
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Affiliation(s)
- Xenia Snetkov
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK; (X.S.); (T.H.); (D.M.)
| | - Tafhima Haider
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK; (X.S.); (T.H.); (D.M.)
| | - Dejan Mesner
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK; (X.S.); (T.H.); (D.M.)
| | - Nicholas Groves
- Molecular and Cellular Biophysics Program, Department of Biological Sciences, University of Denver, Denver, CO 80210, USA; (N.G.); (S.B.v.E.)
| | - Schuyler B. van Engelenburg
- Molecular and Cellular Biophysics Program, Department of Biological Sciences, University of Denver, Denver, CO 80210, USA; (N.G.); (S.B.v.E.)
| | - Clare Jolly
- Division of Infection and Immunity, University College London, London WC1E 6BT, UK; (X.S.); (T.H.); (D.M.)
- Correspondence:
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6
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Chen R, Zhang S, Su S, Ye H, Shu H. Interactions Between Specific Immune Status of Pregnant Women and SARS-CoV-2 Infection. Front Cell Infect Microbiol 2021; 11:721309. [PMID: 34458162 PMCID: PMC8387674 DOI: 10.3389/fcimb.2021.721309] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 07/29/2021] [Indexed: 12/18/2022] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the pathogen responsible for the Coronavirus Disease 2019 (COVID-19) global pandemic. Because it is a new and highly contagious coronavirus, most people, especially pregnant women, lack immunity. It is therefore important to understand the interaction between why pregnant women are susceptible to SARS-CoV-2 and the specific immune systems of pregnant women. Here, we provide an overview of the changes that occur in the immune system during pregnancy, the activation and response of the immune system in pregnant women with COVID-19, adverse pregnancy outcomes in pregnant women with COVID-19, and the treatment and prevention of COVID-19 in this population.
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Affiliation(s)
- Ruirong Chen
- Department of Anesthesiology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Shaofen Zhang
- Department of Gynaecology and Obstetrics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangzhou, China
| | - Sheng Su
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Haiyan Ye
- Department of Gynaecology and Obstetrics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Haihua Shu
- Department of Anesthesiology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
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