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Colombani T, Haudebourg T, Pitard B. 704/DNA vaccines leverage cytoplasmic DNA stimulation to promote anti-HIV neutralizing antibody production in mice and strong immune response against alpha-fetoprotein in non-human primates. MOLECULAR THERAPY. NUCLEIC ACIDS 2023; 32:743-757. [PMID: 37251693 PMCID: PMC10213191 DOI: 10.1016/j.omtn.2023.04.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 04/28/2023] [Indexed: 05/31/2023]
Abstract
Genetic immunization is an attractive approach for prophylactic and therapeutic vaccination using synthetic vectors to deliver antigen-encoding nucleic acids. Recently, DNA delivered by a physical means or RNA by liposomes consisting of four different lipids demonstrated good protection in human phase III clinical trials and received Drugs Controller General of India and US FDA approval to protect against COVID-19, respectively. However, the development of a system allowing for efficient and simple delivery of nucleic acids while improving immune response priming has the potential to unleash the full therapeutic potential of genetic immunization. DNA-based gene therapies and vaccines have the potential for rapid development, as exemplified by the recent approval of Collategene, a gene therapy to treat human critical limb ischemia, and ZyCoV, a DNA vaccine delivered by spring-powered jet injector to protect against SARS-CoV2 infection. Recently, we reported amphiphilic block copolymer 704 as a promising synthetic vector for DNA vaccination in various models of human diseases. This vector allows dose sparing of antigen-encoding plasmid DNA. Here, we report the capacity of 704-mediated HIV and anti-hepatocellular carcinoma DNA vaccines to induce the production of specific antibodies against gp120 HIV envelope proteins in mice and against alpha-fetoprotein antigen in non-human primates, respectively. An investigation of the underlying mechanisms showed that 704-mediated vaccination did trigger a strong immune response by (1) allowing a direct DNA delivery into the cytosol, (2) promoting an intracytoplasmic DNA sensing leading to both interferon and NF-κB cascade stimulation, and (3) inducing antigen expression by muscle cells and presentation by antigen-presenting cells, leading to the induction of a robust adaptive response. Overall, our findings suggest that the 704-mediated DNA vaccination platform is an attractive method to develop both prophylactic and therapeutic vaccines.
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Affiliation(s)
- Thibault Colombani
- Nantes Université, University of Angers, INSERM, CNRS, Immunology and New Concepts in Immunotherapy, INSERM UMR1302, CNRS EMR6001, 44000 Nantes, France
| | - Thomas Haudebourg
- Nantes Université, University of Angers, INSERM, CNRS, Immunology and New Concepts in Immunotherapy, INSERM UMR1302, CNRS EMR6001, 44000 Nantes, France
| | - Bruno Pitard
- Nantes Université, University of Angers, INSERM, CNRS, Immunology and New Concepts in Immunotherapy, INSERM UMR1302, CNRS EMR6001, 44000 Nantes, France
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Tellier M. Structure, Activity, and Function of SETMAR Protein Lysine Methyltransferase. Life (Basel) 2021; 11:life11121342. [PMID: 34947873 PMCID: PMC8704517 DOI: 10.3390/life11121342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 12/21/2022] Open
Abstract
SETMAR is a protein lysine methyltransferase that is involved in several DNA processes, including DNA repair via the non-homologous end joining (NHEJ) pathway, regulation of gene expression, illegitimate DNA integration, and DNA decatenation. However, SETMAR is an atypical protein lysine methyltransferase since in anthropoid primates, the SET domain is fused to an inactive DNA transposase. The presence of the DNA transposase domain confers to SETMAR a DNA binding activity towards the remnants of its transposable element, which has resulted in the emergence of a gene regulatory function. Both the SET and the DNA transposase domains are involved in the different cellular roles of SETMAR, indicating the presence of novel and specific functions in anthropoid primates. In addition, SETMAR is dysregulated in different types of cancer, indicating a potential pathological role. While some light has been shed on SETMAR functions, more research and new tools are needed to better understand the cellular activities of SETMAR and to investigate the therapeutic potential of SETMAR.
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Affiliation(s)
- Michael Tellier
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK
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Antoine-Lorquin A, Arensburger P, Arnaoty A, Asgari S, Batailler M, Beauclair L, Belleannée C, Buisine N, Coustham V, Guyetant S, Helou L, Lecomte T, Pitard B, Stévant I, Bigot Y. Two repeated motifs enriched within some enhancers and origins of replication are bound by SETMAR isoforms in human colon cells. Genomics 2021; 113:1589-1604. [PMID: 33812898 DOI: 10.1016/j.ygeno.2021.03.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 03/25/2021] [Accepted: 03/30/2021] [Indexed: 11/15/2022]
Abstract
Setmar is a gene specific to simian genomes. The function(s) of its isoforms are poorly understood and their existence in healthy tissues remains to be validated. Here we profiled SETMAR expression and its genome-wide binding landscape in colon tissue. We found isoforms V3 and V6 in healthy and tumour colon tissues as well as incell lines. In two colorectal cell lines SETMAR binds to several thousand Hsmar1 and MADE1 terminal ends, transposons mostly located in non-genic regions of active chromatin including in enhancers. It also binds to a 12-bp motifs similar to an inner motif in Hsmar1 and MADE1 terminal ends. This motif is interspersed throughout the genome and is enriched in GC-rich regions as well as in CpG islands that contain constitutive replication origins. It is also found in enhancers other than those associated with Hsmar1 and MADE1. The role of SETMAR in the expression of genes, DNA replication and in DNA repair are discussed.
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Affiliation(s)
| | - Peter Arensburger
- Biological Sciences Department, California State Polytechnic University, Pomona, CA 91768, - United States
| | - Ahmed Arnaoty
- EA GICC, 7501, CHRU de Tours, 37044 TOURS, Cedex 09, France
| | - Sassan Asgari
- School of Biological Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Martine Batailler
- PRC, UMR INRA 0085, CNRS 7247, Centre INRA Val de Loire, 37380 Nouzilly, France
| | - Linda Beauclair
- PRC, UMR INRA 0085, CNRS 7247, Centre INRA Val de Loire, 37380 Nouzilly, France
| | | | - Nicolas Buisine
- UMR CNRS 7221, Muséum National d'Histoire Naturelle, 75005 Paris, France
| | | | - Serge Guyetant
- Tumorothèque du CHRU de Tours, 37044 Tours, Cedex, France
| | - Laura Helou
- PRC, UMR INRA 0085, CNRS 7247, Centre INRA Val de Loire, 37380 Nouzilly, France
| | | | - Bruno Pitard
- Université de Nantes, CNRS ERL6001, Inserm 1232, CRCINA, F-44000 Nantes, France
| | - Isabelle Stévant
- Institut de Génomique Fonctionnelle de Lyon, Univ Lyon, CNRS UMR 5242, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon, 1, 46 allée d'Italie, 69364 Lyon, France
| | - Yves Bigot
- PRC, UMR INRA 0085, CNRS 7247, Centre INRA Val de Loire, 37380 Nouzilly, France.
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Caballero I, Riou M, Hacquin O, Chevaleyre C, Barc C, Pezant J, Pinard A, Fassy J, Rezzonico R, Mari B, Heuzé-Vourc'h N, Pitard B, Vassaux G. Tetrafunctional Block Copolymers Promote Lung Gene Transfer in Newborn Piglets. MOLECULAR THERAPY. NUCLEIC ACIDS 2019; 16:186-193. [PMID: 30897407 PMCID: PMC6426709 DOI: 10.1016/j.omtn.2019.02.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 12/21/2022]
Abstract
Tetrafunctional block copolymers are molecules capable of complexing DNA. Although ineffective in vitro, studies in mice have shown that the tetrafunctional block copolymer 704 is a more efficient lung gene transfer agent than the cationic liposome GL67A, previously used in a phase II clinical trial in cystic fibrosis patients. In the present study, we compared the gene transfer capacity of the 704-DNA formulation and a cationic liposome-DNA formulation equivalent to GL67A in a larger-animal model, the newborn piglet. Our results indicate an efficacy of the 704-DNA formulation well above one order of magnitude higher than that of the cationic liposome-DNA formulation, with no elevated levels of interleukin-6 (IL-6), taken as a marker of inflammation. Transgene expression was heterogeneous within lung lobes, with expression levels that were below the detection threshold in some samples, while high in other samples. This heterogeneity is likely to be due to the bolus injection procedure as well as to the small volume of injection. The present study highlights the potential of tetrafunctional block copolymers as non-viral vectors for lung gene therapy.
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Affiliation(s)
- Ignacio Caballero
- INRA Centre Val de Loire - Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), 37380 Nouzilly, France
| | - Mickaël Riou
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie expérimentale (PFIE), 37380 Nouzilly, France
| | - Océane Hacquin
- Université Côte d'Azur, INSERM, CNRS, IPMC, Valbonne, France; FHU-OncoAge, Nice, France
| | - Claire Chevaleyre
- INRA Centre Val de Loire - Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), 37380 Nouzilly, France
| | - Céline Barc
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie expérimentale (PFIE), 37380 Nouzilly, France
| | - Jérémy Pezant
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie expérimentale (PFIE), 37380 Nouzilly, France
| | - Anne Pinard
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie expérimentale (PFIE), 37380 Nouzilly, France
| | - Julien Fassy
- Université Côte d'Azur, INSERM, CNRS, IPMC, Valbonne, France; FHU-OncoAge, Nice, France
| | - Roger Rezzonico
- Université Côte d'Azur, INSERM, CNRS, IPMC, Valbonne, France; FHU-OncoAge, Nice, France
| | - Bernard Mari
- Université Côte d'Azur, INSERM, CNRS, IPMC, Valbonne, France; FHU-OncoAge, Nice, France
| | | | - Bruno Pitard
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Georges Vassaux
- Université Côte d'Azur, INSERM, CNRS, IPMC, Valbonne, France; FHU-OncoAge, Nice, France.
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Bacterial phospholipases C as vaccine candidate antigens against cystic fibrosis respiratory pathogens: the Mycobacterium abscessus model. Vaccine 2015; 33:2118-24. [PMID: 25804706 DOI: 10.1016/j.vaccine.2015.03.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 03/05/2015] [Accepted: 03/11/2015] [Indexed: 01/16/2023]
Abstract
BACKGROUND Vaccine strategies represent one of the fighting answers against multiresistant bacteria in a number of clinical settings like cystic fibrosis (CF). Mycobacterium abscessus, an emerging CF pathogen, raises difficult therapeutic problems due to its intrinsic antibiotic multiresistance. METHODS By reverse vaccinology, we identified M. abscessus phospholipase C (MA-PLC) as a potential vaccine target. We deciphered here the protective response generated by vaccination with plasmid DNA encoding the MA-PLC formulated with a tetra functional block copolymer 704, in CF (ΔF508) mice. Protection was tested against aerosolized smooth and rough (hypervirulent) variants of M. abscessus. RESULTS MA-PLC DNA vaccination (days 0, 21, 42) elicited a strong antibody response. A significant protective effect was obtained against aerosolized M. abscessus (S variant) in ΔF508 mice, but not in wild-type FVB littermates; similar results were observed when: (i) challenging mice with the "hypervirulent" R variant, and; (ii) immunizing mice with purified MA-PLC protein. High IgG titers against MA-PLC protein were measured in CF patients with M. abscessus infection; interestingly, significant titers were also detected in CF patients positive for Pseudomonas aeruginosa versus P. aeruginosa-negative controls. CONCLUSIONS MA-PLC DNA- and PLC protein-vaccinated mice cleared more rapidly M. abscessus than β-galactosidase DNA- or PBS- vaccinated mice in the context of CF. PLCs could constitute interesting vaccine targets against common PLC-producing CF pathogens like P. aeruginosa.
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Bire S, Casteret S, Arnaoty A, Piégu B, Lecomte T, Bigot Y. Transposase concentration controls transposition activity: myth or reality? Gene 2013; 530:165-71. [PMID: 23994686 DOI: 10.1016/j.gene.2013.08.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 07/25/2013] [Accepted: 08/12/2013] [Indexed: 12/11/2022]
Abstract
Deciphering the mechanisms underlying the regulation of DNA transposons might be central to understanding their function and dynamics in genomes. From results obtained under artificial experimental conditions, it has been proposed that some DNA transposons self-regulate their activity via overproduction inhibition (OPI), a mechanism by which transposition activity is down-regulated when the transposase is overconcentrated in cells. However, numerous studies have given contradictory results depending on the experimental conditions. Moreover, we do not know in which cellular compartment this phenomenon takes place, or whether transposases assemble to form dense foci when they are highly expressed in cells. In the present review, we focus on investigating the data available about eukaryotic transposons to explain the mechanisms underlying OPI. Data in the literature indicate that members of the IS630-Tc1-mariner, Hobo-Ac-Tam, and piggyBac superfamilies are able to use OPI to self-regulate their transposition activity in vivo in most eukaryotic cells, and that some of them are able to assemble so as to form higher order soluble oligomers. We also investigated the localization and behavior of GFP-fused transposases belonging to the mariner, Tc1-like, and piggyBac families, investigating their ability to aggregate in cells when they are overexpressed. Transposases are able to form dense foci when they are highly expressed. Moreover, the cellular compartments in which these foci are concentrated depend on the transposase, and on its expression. The data presented here suggest that sequestration in cytoplasmic or nucleoplasmic foci, or within the nucleoli, might protect the genome against the potentially genotoxic effects of the non-specific nuclease activities of eukaryotic transposases.
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Affiliation(s)
- Solenne Bire
- PRC, UMR INRA-CNRS 7247, Centre INRA Val de Loire, 37380 Nouzilly Cedex, France
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