1
|
Harris JE. The repeated setbacks of HIV vaccine development laid the groundwork for SARS-CoV-2 vaccines. HEALTH POLICY AND TECHNOLOGY 2022; 11:100619. [PMID: 35340773 PMCID: PMC8935961 DOI: 10.1016/j.hlpt.2022.100619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The decades-long effort to produce a workable HIV vaccine has hardly been a waste of public and private resources. To the contrary, the scientific know-how acquired along the way has served as the critical foundation for the development of vaccines against the novel, pandemic SARS-CoV-2 virus. We retell the real-world story of HIV vaccine research – with all its false leads and missteps – in a way that sheds light on the current state of the art of antiviral vaccines. We find that HIV-related R&D had more than a general spillover effect. In fact, the repeated failures of phase 2 and 3 clinical trials of HIV vaccine candidates have served as a critical stimulus to the development of successful vaccine technologies today. We rebut the counterargument that HIV vaccine development has been no more than a blind alley, and that recently developed vaccines against COVID-19 are really descendants of successful vaccines against Ebola, MERS, and SARS. These successful vaccines likewise owe much to the vicissitudes of HIV vaccine development. We then discuss how the failures of HIV vaccine development have taught us how adapt SARS-CoV-2 vaccines to immune escape from emerging variants. Finally, we inquire whether recent advances in the development of vaccines against SARS-CoV-2 might in turn further the development of an HIV vaccine - what we describe as a reverse spillover effect.
Collapse
Affiliation(s)
- Jeffrey E Harris
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Eisner Health, Los Angeles, CA 90015, USA
| |
Collapse
|
2
|
Taking advantage of cellular uptake of ferritin nanocages for targeted drug delivery. J Control Release 2020; 325:176-190. [DOI: 10.1016/j.jconrel.2020.06.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 12/16/2022]
|
3
|
RNA-Binding Domains of Heterologous Viral Proteins Substituted for Basic Residues in the RSV Gag NC Domain Restore Specific Packaging of Genomic RNA. Viruses 2020; 12:v12040370. [PMID: 32230826 PMCID: PMC7232437 DOI: 10.3390/v12040370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/09/2020] [Accepted: 03/25/2020] [Indexed: 02/03/2023] Open
Abstract
The Rous sarcoma virus Gag polyprotein transiently traffics through the nucleus, which is required for efficient incorporation of the viral genomic RNA (gRNA) into virus particles. Packaging of gRNA is mediated by two zinc knuckles and basic residues located in the nucleocapsid (NC) domain in Gag. To further examine the role of basic residues located downstream of the zinc knuckles in gRNA encapsidation, we used a gain-of-function approach. We replaced a basic residue cluster essential for gRNA packaging with heterologous basic residue motif (BR) with RNA-binding activity from either the HIV-1 Rev protein (Rev BR) or the HSV ICP27 protein (ICP27 BR). Compared to wild-type Gag, the mutant ICP27 BR and Rev BR Gag proteins were much more strongly localized to the nucleus and released significantly lower levels of virus particles. Surprisingly, both the ICP27 BR and Rev BR mutants packaged normal levels of gRNA per virus particle when examined in the context of a proviral vector, yet both mutants were noninfectious. These results support the hypothesis that basic residues located in the C-terminal region of NC are required for selective gRNA packaging, potentially by binding non-specifically to RNA via electrostatic interactions.
Collapse
|
4
|
Gupta J, Kaul S, Srivastava A, Kaushik N, Ghosh S, Sharma C, Batra G, Banerjee M, Shalimar, Nayak B, Ranjith-Kumar CT, Surjit M. Expression, Purification and Characterization of the Hepatitis E Virus Like-Particles in the Pichia pastoris. Front Microbiol 2020; 11:141. [PMID: 32117160 PMCID: PMC7017414 DOI: 10.3389/fmicb.2020.00141] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/21/2020] [Indexed: 12/12/2022] Open
Abstract
Hepatitis E virus (HEV) is associated with acute hepatitis disease, which may lead to chronic disease in immunocompromised individuals. The disease is particularly severe among pregnant women (20-30% mortality). The only licensed vaccine against HEV, which is available in China, is the Escherichia coli purified recombinant virus-like particles (VLPs) encompassing the 368-660 amino acids (aa) of the viral ORF2 protein. The viral capsid is formed by the ORF2 protein, which harbors three glycosylation sites. Baculo virus expression system has been employed to generate a glycosylated VLP, which encompasses 112-608aa of the ORF2 protein. Here, we sought to produce a recombinant VLP containing 112-608aa of the ORF2 protein in Pichia pastoris (P. pastoris) expression system. The cDNA sequence encoding 112-608aa of the ORF2 protein was fused with the α-mating factor secretion signal coding sequence (for release of the fusion protein to the culture medium) and cloned into the yeast vector pPICZα. Optimum expression of recombinant protein was obtained at 72 h induction in 1.5% methanol using inoculum density (A600) of 80 and at pH-3.0 of the culture medium. Identity of the purified protein was confirmed by mass spectrometry analysis. Further studies revealed the glycosylation pattern and VLP nature of the purified protein. Immunization of BALB/c mice with these VLPs induced potent immune response as evidenced by the high ORF2 specific IgG titer and augmented splenocyte proliferation in a dose dependent manner. 112-608aa ORF2 VLPs produced in P. pastoris appears to be a suitable candidate for development of diagnostic and prophylactic reagents against the hepatitis E.
Collapse
Affiliation(s)
- Jyoti Gupta
- Virology Laboratory, Vaccine and Infectious Disease Research Centre, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India
| | - Sheetal Kaul
- Virology Laboratory, Vaccine and Infectious Disease Research Centre, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India.,International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Akriti Srivastava
- Virology Laboratory, Vaccine and Infectious Disease Research Centre, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India
| | - Neha Kaushik
- Centre for Bio-Design and Diagnostics, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India.,School of Life Sciences, Manipal University, Manipal, India
| | - Sukanya Ghosh
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi, India
| | - Chandresh Sharma
- Centre for Bio-Design and Diagnostics, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India
| | - Gaurav Batra
- Centre for Bio-Design and Diagnostics, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India
| | - Manidipa Banerjee
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi, India
| | - Shalimar
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Baibaswata Nayak
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - C T Ranjith-Kumar
- Virology Laboratory, Vaccine and Infectious Disease Research Centre, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India.,University School of Biotechnology, Guru Gobind Singh Indraprastha University, New Delhi, India
| | - Milan Surjit
- Virology Laboratory, Vaccine and Infectious Disease Research Centre, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, India
| |
Collapse
|
5
|
The generation and use of recombinant extracellular vesicles as biological reference material. Nat Commun 2019; 10:3288. [PMID: 31337761 PMCID: PMC6650486 DOI: 10.1038/s41467-019-11182-0] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 06/26/2019] [Indexed: 11/08/2022] Open
Abstract
Recent years have seen an increase of extracellular vesicle (EV) research geared towards biological understanding, diagnostics and therapy. However, EV data interpretation remains challenging owing to complexity of biofluids and technical variation introduced during sample preparation and analysis. To understand and mitigate these limitations, we generated trackable recombinant EV (rEV) as a biological reference material. Employing complementary characterization methods, we demonstrate that rEV are stable and bear physical and biochemical traits characteristic of sample EV. Furthermore, rEV can be quantified using fluorescence-, RNA- and protein-based technologies available in routine laboratories. Spiking rEV in biofluids allows recovery efficiencies of commonly implemented EV separation methods to be identified, intra-method and inter-user variability induced by sample handling to be defined, and to normalize and improve sensitivity of EV enumerations. We anticipate that rEV will aid EV-based sample preparation and analysis, data normalization, method development and instrument calibration in various research and biomedical applications. There is no universal reference material to develop extracellular vesicle (EV) separation methods and carry out calibration and normalization. Here the authors use HIV-derived gag proteins to assemble recombinant fluorescent EV as a trackable reference material resembling the physical and biochemical properties of sample EV.
Collapse
|
6
|
Tohidi F, Sadat SM, Bolhassani A, Yaghobi R, Larijani MS. Induction of a Robust Humoral Response using HIV-1 VLPMPER-V3 as a Novel Candidate Vaccine in BALB/c Mice. Curr HIV Res 2019; 17:33-41. [DOI: 10.2174/1570162x17666190306124218] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 01/10/2023]
Abstract
Background:
Several approaches have not been successful to suppress HIV (Human immunodeficiency
virus) infection among infected individuals or to prevent it yet. In order to expand
strong HIV specific humoral and cellular responses, Virus-like particles (VLPs) as potential vaccines
show significant increase in neutralizing antibodies secretion, T-cell count and also secretion
of cytokines.
Objective:
This study aimed at immunological evaluation of VLPs harboring high copy of MPERV3
in BALB/c mice.
Methods:
Female BALB/c mice were immunized with homologous and heterologous primeboosting
regimens of HIV-1 VLPMPER-V3. Their immune responses were evaluated for humoral responses
(Total IgG and IgG isotyping) and cellular responses (IFN-γ, IL-5 secretion, in vitro CTL
assay and T cell proliferation) and compared in immunized mice.
Results:
The data showed robust induction of humoral response in mice groups which received different
regimens of VLP. Furthermore, analysis of cytokine profile indicated that the highest IL-5 secretion
was related to VLP+M50 group and confirmed the dominance of Th2 immunity in this
group.
Conclusion:
This study showed that VLP MPER-V3 as a potential vaccine candidate has the potency as
an effective prophylactic vaccine and this finding guarantees further investigations to achieve a
promising HIV-1 vaccine candidate.
Collapse
Affiliation(s)
- Fatemeh Tohidi
- Department of Hepatitis, AIDS and Blood Borne Diseases, Pasteur Institute of Iran, Tehran, Iran
| | - Seyed Mehdi Sadat
- Department of Hepatitis, AIDS and Blood Borne Diseases, Pasteur Institute of Iran, Tehran, Iran
| | - Azam Bolhassani
- Department of Hepatitis, AIDS and Blood Borne Diseases, Pasteur Institute of Iran, Tehran, Iran
| | - Ramin Yaghobi
- Shiraz Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mona Sadat Larijani
- Department of Hepatitis, AIDS and Blood Borne Diseases, Pasteur Institute of Iran, Tehran, Iran
| |
Collapse
|
7
|
Barnowski C, Kadzioch N, Damm D, Yan H, Temchura V. Advantages and Limitations of Integrated Flagellin Adjuvants for HIV-Based Nanoparticle B-Cell Vaccines. Pharmaceutics 2019; 11:E204. [PMID: 31052410 PMCID: PMC6572692 DOI: 10.3390/pharmaceutics11050204] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 04/24/2019] [Accepted: 04/26/2019] [Indexed: 11/29/2022] Open
Abstract
The great advantage of virus-like particle (VLP) nano-vaccines is their structural identity to wild-type viruses, ensuring that antigen-specific B-cells encounter viral proteins in their natural conformation. "Wild-type" viral nanoparticles can be further genetically or biochemically functionalized with biomolecules (antigens and adjuvants). Flagellin is a potent inducer of innate immunity and it has demonstrated adjuvant effectiveness due to its affinity for toll-like receptor 5 (TLR5). In contrast to most TLR ligands, flagellin is a protein and can induce an immune response against itself. To avoid side-effects, we incorporated a less inflammatory and less immunogenic form of flagellin as an adjuvant into HIV-based nanoparticle B-cell-targeting vaccines that display either the HIV-1 envelope protein (Env) or a model antigen, hen egg lysozyme (HEL). While flagellin significantly enhanced HEL-specific IgG responses, anti-Env antibody responses were suppressed. We demonstrated that flagellin did not activate B-cells directly in vitro, but might compete for CD4+ T-cell help in vivo. Therefore, we hypothesize that in the context of VLP-based B-cell nano-vaccines, flagellin serves as an antigen itself and may outcompete a less immunogenic antigen with its antibody response. In contrast, in combination with a strong immunogen, the adjuvant activity of flagellin may dominate over its immunogenicity.
Collapse
Affiliation(s)
- Cornelia Barnowski
- Department of Molecular and Medical Virology, Ruhr-University Bochum, 44801 Bochum, Germany.
- Institute of Virology, Medical Faculty, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany.
| | - Nicole Kadzioch
- Department of Molecular and Medical Virology, Ruhr-University Bochum, 44801 Bochum, Germany.
- Division of Experimental Clinical Research, Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland.
| | - Dominik Damm
- Institute of Clinical and Molecular Virology, Friedrich-Alexander University Erlangen-Nürnberg, 91054 Erlangen, Germany.
| | - Huimin Yan
- Mucosal Immunity Research Group, State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China.
| | - Vladimir Temchura
- Institute of Clinical and Molecular Virology, Friedrich-Alexander University Erlangen-Nürnberg, 91054 Erlangen, Germany.
| |
Collapse
|
8
|
Charlton Hume HK, Vidigal J, Carrondo MJT, Middelberg APJ, Roldão A, Lua LHL. Synthetic biology for bioengineering virus-like particle vaccines. Biotechnol Bioeng 2018; 116:919-935. [PMID: 30597533 PMCID: PMC7161758 DOI: 10.1002/bit.26890] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 11/08/2018] [Accepted: 11/29/2018] [Indexed: 12/13/2022]
Abstract
Vaccination is the most effective method of disease prevention and control. Many viruses and bacteria that once caused catastrophic pandemics (e.g., smallpox, poliomyelitis, measles, and diphtheria) are either eradicated or effectively controlled through routine vaccination programs. Nonetheless, vaccine manufacturing remains incredibly challenging. Viruses exhibiting high antigenic diversity and high mutation rates cannot be fairly contested using traditional vaccine production methods and complexities surrounding the manufacturing processes, which impose significant limitations. Virus‐like particles (VLPs) are recombinantly produced viral structures that exhibit immunoprotective traits of native viruses but are noninfectious. Several VLPs that compositionally match a given natural virus have been developed and licensed as vaccines. Expansively, a plethora of studies now confirms that VLPs can be designed to safely present heterologous antigens from a variety of pathogens unrelated to the chosen carrier VLPs. Owing to this design versatility, VLPs offer technological opportunities to modernize vaccine supply and disease response through rational bioengineering. These opportunities are greatly enhanced with the application of synthetic biology, the redesign and construction of novel biological entities. This review outlines how synthetic biology is currently applied to engineer VLP functions and manufacturing process. Current and developing technologies for the identification of novel target‐specific antigens and their usefulness for rational engineering of VLP functions (e.g., presentation of structurally diverse antigens, enhanced antigen immunogenicity, and improved vaccine stability) are described. When applied to manufacturing processes, synthetic biology approaches can also overcome specific challenges in VLP vaccine production. Finally, we address several challenges and benefits associated with the translation of VLP vaccine development into the industry.
Collapse
Affiliation(s)
- Hayley K Charlton Hume
- The University of Queensland, Australian Institute of Bioengineering and Nanotechnology, St Lucia, Queensland, Australia
| | - João Vidigal
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Biologia Experimental e Tecnológica (iBET), Oeiras, Portugal.,Health & Pharma Division, Animal Cell Technology Unit, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, Oeiras, Portugal
| | - Manuel J T Carrondo
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Biologia Experimental e Tecnológica (iBET), Oeiras, Portugal
| | - Anton P J Middelberg
- Faculty of Engineering, Computer and Mathematical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - António Roldão
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Biologia Experimental e Tecnológica (iBET), Oeiras, Portugal.,Health & Pharma Division, Animal Cell Technology Unit, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, Oeiras, Portugal
| | - Linda H L Lua
- The University of Queensland, St Lucia, Queensland, Australia
| |
Collapse
|
9
|
Beltran-Pavez C, Ferreira CB, Merino-Mansilla A, Fabra-Garcia A, Casadella M, Noguera-Julian M, Paredes R, Olvera A, Haro I, Brander C, Garcia F, Gatell JM, Yuste E, Sanchez-Merino V. Guiding the humoral response against HIV-1 toward a MPER adjacent region by immunization with a VLP-formulated antibody-selected envelope variant. PLoS One 2018; 13:e0208345. [PMID: 30566493 PMCID: PMC6300218 DOI: 10.1371/journal.pone.0208345] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 11/15/2018] [Indexed: 12/15/2022] Open
Abstract
Preventive HIV-1 vaccine strategies rely on the elicitation of broadly neutralizing antibody (bNAb) responses, but their induction in vivo by vaccination remains challenging. Considering that the ability of an epitope to elicit effective humoral immunity depends on its exposure on the virion, we have used a reverse genetics approach to select variants from an HIV-1 AC10_29 randomly mutated envelope library that showed increased affinity for a selected bNAb (4E10 bNAb targeting the HIV-1 MPER region). Isolated envelope sequences were analyzed by deep-sequencing showing a small number of dominant changes, including the loss of four potential N-linked glycosylation sites and disruption of the V1/V2 loop. Accordingly, the dominant variant (LR1-C1), showed not only increased affinity for MPER bNAbs 4E10 and 2F5, but also higher affinity for an additional antibody targeting the V3 loop (447-52D) that could be a consequence of an open conformation tier 1-like Env. Furthermore, the amino acids specific for the selected variant are associated with an increased sensitivity for 4E10 and 2F5 antibodies. In vivo studies showed that sera from mice immunized with LR1-C1 viruses possessed an improved neutralizing activity compared to the wild-type AC10_29 env. While Virus Like Particles (VLPs) carrying this envelope were unable to induce detectable neutralizing activity in immunized rabbits, one animal showed antibody response to the 4E10-proximal region. Our data establish a novel approach that has the potential to yield HIV envelope immunogen sequences that direct antibody responses to specific envelope regions.
Collapse
Affiliation(s)
- Carolina Beltran-Pavez
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
| | - Carolina B. Ferreira
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
| | - Alberto Merino-Mansilla
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
| | - Amanda Fabra-Garcia
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
| | - Maria Casadella
- HIVACAT, Barcelona, Spain
- IrsiCaixa AIDS Research Institute, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Marc Noguera-Julian
- HIVACAT, Barcelona, Spain
- IrsiCaixa AIDS Research Institute, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain
- Universitat de Vic-Universitat Central de Catalunya (UVic-UCC), Vic, Spain
| | - Roger Paredes
- HIVACAT, Barcelona, Spain
- IrsiCaixa AIDS Research Institute, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain
- Universitat de Vic-Universitat Central de Catalunya (UVic-UCC), Vic, Spain
| | - Alex Olvera
- HIVACAT, Barcelona, Spain
- IrsiCaixa AIDS Research Institute, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Isabel Haro
- Unit of Synthesis and Biomedical Applications of Peptides, IQAC-CSIC, Barcelona, Spain
| | - Christian Brander
- HIVACAT, Barcelona, Spain
- IrsiCaixa AIDS Research Institute, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain
- Universitat de Vic-Universitat Central de Catalunya (UVic-UCC), Vic, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - Felipe Garcia
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
- Infectious Diseases Unit, Hospital Clinic, Barcelona, Spain
| | - Jose M. Gatell
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
- Infectious Diseases Unit, Hospital Clinic, Barcelona, Spain
| | - Eloisa Yuste
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
| | - Victor Sanchez-Merino
- AIDS Research Unit, Institut d’Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain
- HIVACAT, Barcelona, Spain
- * E-mail:
| |
Collapse
|
10
|
Pankrac J, Klein K, McKay PF, King DFL, Bain K, Knapp J, Biru T, Wijewardhana CN, Pawa R, Canaday DH, Gao Y, Fidler S, Shattock RJ, Arts EJ, Mann JFS. A heterogeneous human immunodeficiency virus-like particle (VLP) formulation produced by a novel vector system. NPJ Vaccines 2018; 3:2. [PMID: 29367885 PMCID: PMC5775397 DOI: 10.1038/s41541-017-0040-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 12/06/2017] [Accepted: 12/08/2017] [Indexed: 01/12/2023] Open
Abstract
First identified as the etiological agent behind Acquired Immunodeficiency Syndrome (AIDS) in the early 1980s, HIV-1 has continued to spread into a global pandemic and major public health concern. Despite the success of antiretroviral therapy at reducing HIV-1 viremia and preventing the dramatic CD4+ T-cell collapse, infected individuals remain HIV positive for life. Unfortunately, it is increasingly clear that natural immunity is not, and may never be, protective against this pathogen. Therefore, efficacious vaccine interventions, which can either prevent infection or eradicate the latent viral reservoir and effect cure, are a major medical priority. Here we describe the development of a safe vaccine platform, currently being utilized in on-going prophylactic and therapeutic preclinical studies and consisting of highly heterogeneous virus-like particle formulations that represent the virus diversity within infected individuals. These VLPs contain no 5'LTR, no functional integrase, and have a severely mutated stem loop 1-thereby preventing any potential reverse transcription, integration, and RNA packaging. Furthermore, we demonstrate that these VLPs are morphologically identical to wild-type virus with polyvalent Env in a functional form. Finally, we show that the VLPs are antigenic and capable of generating strong immune recall responses.
Collapse
Affiliation(s)
- Joshua Pankrac
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
| | - Katja Klein
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
- Division of Infectious Diseases, Department of Medicine, Case Western Reserve University, Cleveland, OH 44106 USA
| | - Paul F. McKay
- Division of Medicine, Department of Infectious Diseases, Imperial College London, Norfolk Place, London, W2 1PG UK
| | - Deborah F. L. King
- Division of Medicine, Department of Infectious Diseases, Imperial College London, Norfolk Place, London, W2 1PG UK
| | - Katie Bain
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
| | - Jason Knapp
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
| | - Tsigereda Biru
- Division of Infectious Diseases, Department of Medicine, Case Western Reserve University, Cleveland, OH 44106 USA
| | - Chanuka N. Wijewardhana
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
| | - Rahul Pawa
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
| | - David H. Canaday
- Division of Infectious Diseases, Department of Medicine, Case Western Reserve University, Cleveland, OH 44106 USA
| | - Yong Gao
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
- Division of Infectious Diseases, Department of Medicine, Case Western Reserve University, Cleveland, OH 44106 USA
| | - Sarah Fidler
- Department of Medicine, Imperial College London, London, UK
| | - Robin J. Shattock
- Division of Medicine, Department of Infectious Diseases, Imperial College London, Norfolk Place, London, W2 1PG UK
| | - Eric J. Arts
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
- Division of Infectious Diseases, Department of Medicine, Case Western Reserve University, Cleveland, OH 44106 USA
| | - Jamie F. S. Mann
- Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1 Canada
- Division of Infectious Diseases, Department of Medicine, Case Western Reserve University, Cleveland, OH 44106 USA
| |
Collapse
|
11
|
Abstract
Safe and efficacious vaccines are arguably the most successful medical interventions of all time. Yet the ongoing discovery of new pathogens, along with emergence of antibiotic-resistant pathogens and a burgeoning population at risk of such infections, imposes unprecedented public health challenges. To meet these challenges, innovative strategies to discover and develop new or improved anti-infective vaccines are necessary. These approaches must intersect the most meaningful insights into protective immunity and advanced technologies with capabilities to deliver immunogens for optimal immune protection. This goal is considered through several recent advances in host-pathogen relationships, conceptual strides in vaccinology, and emerging technologies. Given a clear and growing risk of pandemic disease should the threat of infection go unmet, developing vaccines that optimize protective immunity against high-priority and antibiotic-resistant pathogens represents an urgent and unifying imperative.
Collapse
Affiliation(s)
- Michael R Yeaman
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California 90024.,Division of Molecular Medicine, Department of Medicine, Harbor-UCLA Medical Center, Torrance, California 90509; .,Division of Infectious Diseases, Department of Medicine, Harbor-UCLA Medical Center, Torrance, California 90509.,Los Angeles Biomedical Research Institute, Torrance, California 90502
| | | |
Collapse
|
12
|
Covalent Linkage of HIV-1 Trimers to Synthetic Liposomes Elicits Improved B Cell and Antibody Responses. J Virol 2017; 91:JVI.00443-17. [PMID: 28592540 DOI: 10.1128/jvi.00443-17] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 05/30/2017] [Indexed: 11/20/2022] Open
Abstract
We have demonstrated that a liposomal array of well-ordered trimers enhances B cell activation, germinal center formation, and the elicitation of tier-2 autologous neutralizing antibodies. Previously, we coupled well-ordered cleavage-independent NFL trimers via their C-terminal polyhistidine tails to nickel lipids integrated into the lipid bilayer. Despite favorable in vivo effects, concern remained over the potentially longer-term in vivo instability of noncovalent linkage of the trimers to the liposomes. Accordingly, we tested both cobalt coupling and covalent linkage of the trimers to the liposomes by reengineering the polyhistidine tail to include a free cysteine on each protomer of model BG505 NFL trimers to allow covalent linkage. Both cobalt and cysteine coupling resulted in a high-density array of NFL trimers that was stable in both 20% mouse serum and 100 mM EDTA, whereas the nickel-conjugated trimers were not stable under these conditions. Binding analysis and calcium flux with anti-Env-specific B cells confirmed that the trimers maintained conformational integrity following coupling. Following immunization of mice, serologic analysis demonstrated that the covalently coupled trimers elicited Env-directed antibodies in a manner statistically significantly improved compared to soluble trimers and nickel-conjugated trimers. Importantly, the covalent coupling not only enhanced gp120-directed responses compared to soluble trimers, it also completely eliminated antibodies directed to the C-terminal His tag located at the "bottom" of the spike. In contrast, soluble and noncovalent formats efficiently elicited anti-His tag antibodies. These data indicate that covalent linkage of well-ordered trimers to liposomes in high-density array displays multiple advantages in vitro and in vivoIMPORTANCE Enveloped viruses typically encode a surface-bound glycoprotein that mediates viral entry into host cells and is a primary target for vaccine design. Liposomes with modified lipid head groups have a unique feature of capturing and displaying antigens on their surfaces, mimicking the native pathogens. Our first-generation nickel-based liposomes captured HIV-1 Env glycoprotein trimers via a noncovalent linkage with improved efficacy over soluble glycoprotein in activating germinal center B cells and eliciting tier-2 autologous neutralizing antibodies. In this study, we report the development of second-generation cobalt- and maleimide-based liposomes that have improved in vitro stability over nickel-based liposomes. In particular, the maleimide liposomes captured HIV-1 Env trimers via a more stable covalent bond, resulting in enhanced germinal center B cell responses that generated higher antibody titers than the soluble trimers and liposome-bearing trimers via noncovalent linkages. We further demonstrate that covalent coupling prevents release of the trimers prior to recognition by B cells and masks a nonneutralizing determinant located at the bottom of the trimer.
Collapse
|
13
|
Sepúlveda-Crespo D, Vacas-Córdoba E, Márquez-Miranda V, Araya-Durán I, Gómez R, Mata FJDL, González-Nilo FD, Muñoz-Fernández MÁ. Effect of Several HIV Antigens Simultaneously Loaded with G2-NN16 Carbosilane Dendrimer in the Cell Uptake and Functionality of Human Dendritic Cells. Bioconjug Chem 2016; 27:2844-2849. [DOI: 10.1021/acs.bioconjchem.6b00623] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Daniel Sepúlveda-Crespo
- Instituto
de Investigación Sanitaria Gregorio Marañón (IiSGM), Spanish HIV−HGM BioBank, Madrid 28007, Spain
- Networking Research Center on Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Enrique Vacas-Córdoba
- Instituto
de Investigación Sanitaria Gregorio Marañón (IiSGM), Spanish HIV−HGM BioBank, Madrid 28007, Spain
- Networking Research Center on Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Valeria Márquez-Miranda
- Center
for Bioinformatics and Integrative Biology (CBIB), Facultad de Biología, Universidad Andres Bello, Av. República 239, Santiago 8320000, Chile
- Fundación Fraunhofer Chile Research, Las
Condes 7550296, Chile
| | - Ingrid Araya-Durán
- Center
for Bioinformatics and Integrative Biology (CBIB), Facultad de Biología, Universidad Andres Bello, Av. República 239, Santiago 8320000, Chile
- Fundación Fraunhofer Chile Research, Las
Condes 7550296, Chile
| | - Rafael Gómez
- Networking Research Center on Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Departamento
Química Orgánica y Química Inorgánica, Universidad de Alcalá Henares, Campus Universitario, Alcalá de Henares 28805, Spain
| | - Francisco Javier de la Mata
- Networking Research Center on Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Departamento
Química Orgánica y Química Inorgánica, Universidad de Alcalá Henares, Campus Universitario, Alcalá de Henares 28805, Spain
| | - Fernando Danilo González-Nilo
- Center
for Bioinformatics and Integrative Biology (CBIB), Facultad de Biología, Universidad Andres Bello, Av. República 239, Santiago 8320000, Chile
- Fundación Fraunhofer Chile Research, Las
Condes 7550296, Chile
- Centro
Interdisciplinario de Neurociencia de Valparaíso, Facultad
de Ciencias, Universidad de Valparaíso, Valparaíso 8370071, Chile
| | - M Ángeles Muñoz-Fernández
- Instituto
de Investigación Sanitaria Gregorio Marañón (IiSGM), Spanish HIV−HGM BioBank, Madrid 28007, Spain
- Networking Research Center on Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| |
Collapse
|