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Le virus T-lymphotrope humain de type 1 (HTLV-1) est le premier rétrovirus à avoir été caractérisé comme étant à l’origine d’une maladie humaine, infectant 5 à 10 millions de personnes à travers le monde. Il est associé à deux maladies principales : le lymphome/leucémie à cellules T de l’adulte (ATL) et la paraparésie spastique tropicale ou myélopathie associée au HTLV-1 (TSP/HAM). Il a la particularité de produire un transcrit antisens ainsi que sa protéine associée : HBZ. L’ARNm de HBZ est principalement localisé dans le noyau des cellules infectées. Ce transcrit présente des propriétés particulières en étant notamment capable d’interagir spécifiquement avec le promoteur HTLV-1, le 5’LTR. Ce mécanisme empêche l'expression génétique des protéines dirigée par le 5’LTR, une surexpression de ce transcrit provoquant un niveau de production des protéines Tax et Gag/Pol significativement plus bas. Le but de ce travail est d’étudier les fonctions de cet ARN en venant le cibler avec des acides peptidiques nucléiques (PNA) et ainsi d'évaluer un éventuel impact sur l’expression de la protéine Tax dans des lignées infectées par HTLV-1. Les résultats montrent que les PNA sont bien absorbés par les cellules, mais y sont toxiques. En étant capables de pénétrer dans les cellules et d’atteindre leur noyau, ces PNA pourraient permettre d'étudier le rôle de l’ARN de HBZ dans les mécanismes de viabilité cellulaire et de latence virale.

Rétrovirus, HTLV-1, antisens, PNA, acides nucléiques peptidiques --- Sciences du vivant > Biotechnologie

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Foamy viruses, currently referred to as spumaretroviruses, are the most ancient retroviruses as evidenced by traces of viral sequences dispersed in all vertebrate classes from fish to mammals. Additionally, infectious foamy viruses circulate in a variety of mammalian species including simian, bovine, equine, caprine, and feline. Foamy viruses have many unique features which led to the division of the retrovirus family into two subfamilies, the Orthoretrovirinae and Spumaretrovirinae. In vitro, foamy viruses have a broad host range and in vivo, human infections have been described due to cross-species transmission from infected nonhuman primates. Thus far, there are no reports of virus-induced disease in humans or in the natural host species. These unique properties of foamy viruses have led researchers to develop foamy viruses as gene therapy vectors to study virus–virus and virus–host interactions for identifying factors involved in virus replication, transmission, and immune regulation that could influence potential clinical outcomes in humans as well as for using endogenous foamy virus sequences in the analysis of host species evolution.

Medicine --- Neurosciences --- spumavirus --- feline illness --- proviral load --- neglected virus --- bovine foamy virus --- infectious clone --- particle release --- cell-free transmission --- foamy virus --- spumaretrovirus --- cross-species virus transmission --- zoonosis --- restriction factors --- immune responses --- FV vectors --- virus replication --- latent infection --- feline foamy virus --- epidemiology --- retrovirus --- Spumaretrovirus --- mountain lion --- Puma concolor --- ELISA --- protease --- reverse transcriptase --- RNase H --- reverse transcription --- antiviral drugs --- resistance --- simian foamy virus --- gibbon --- lesser apes --- co-evolution --- complete viral genome --- equine foamy virus --- isolation --- Japan --- sero-epidemiology --- reptile foamy virus --- endogenous foamy virus --- endogenous retrovirus --- ancient retroviruses --- co-speciation --- foamy virus-host interactions --- viral tropism --- infection --- kidney --- cats --- chronic kidney disease --- chronic renal disease --- integrase --- integration --- co-infections --- NHP --- pathogenesis --- zoonoses --- viral prevalence --- Neotropical primates --- free-living primates --- Brazil --- new world primates --- simian retrovirus --- BFV --- spuma virus --- model system --- animal model --- animal experiment --- miRNA function --- gene expression --- antiviral host restriction --- gene therapy --- in-vivo gene therapy --- hematopoietic stem and progenitor cells --- foamy virus vector --- pre-clinical canine model --- SCID-X1 --- innate sensing --- cGAS --- STING --- foamy viruses --- wild ruminants --- European bison --- red deer --- roe deer --- fallow deer --- seroreactivity --- inter-species transmission --- HSC --- gene marking --- FV gene transfer to HSCs --- gene therapy alternatives --- serotype --- high-throughput sequencing --- replication kinetics --- cytopathic effect --- reverse transcriptase activity --- miRNA expression --- virus-host-interaction --- miRNA target gene identification --- innate immunity --- ANKRD17 --- Bif1 (SH3GLB1) --- replication in vitro

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Foamy viruses, currently referred to as spumaretroviruses, are the most ancient retroviruses as evidenced by traces of viral sequences dispersed in all vertebrate classes from fish to mammals. Additionally, infectious foamy viruses circulate in a variety of mammalian species including simian, bovine, equine, caprine, and feline. Foamy viruses have many unique features which led to the division of the retrovirus family into two subfamilies, the Orthoretrovirinae and Spumaretrovirinae. In vitro, foamy viruses have a broad host range and in vivo, human infections have been described due to cross-species transmission from infected nonhuman primates. Thus far, there are no reports of virus-induced disease in humans or in the natural host species. These unique properties of foamy viruses have led researchers to develop foamy viruses as gene therapy vectors to study virus–virus and virus–host interactions for identifying factors involved in virus replication, transmission, and immune regulation that could influence potential clinical outcomes in humans as well as for using endogenous foamy virus sequences in the analysis of host species evolution.

Medicine --- Neurosciences --- spumavirus --- feline illness --- proviral load --- neglected virus --- bovine foamy virus --- infectious clone --- particle release --- cell-free transmission --- foamy virus --- spumaretrovirus --- cross-species virus transmission --- zoonosis --- restriction factors --- immune responses --- FV vectors --- virus replication --- latent infection --- feline foamy virus --- epidemiology --- retrovirus --- Spumaretrovirus --- mountain lion --- Puma concolor --- ELISA --- protease --- reverse transcriptase --- RNase H --- reverse transcription --- antiviral drugs --- resistance --- simian foamy virus --- gibbon --- lesser apes --- co-evolution --- complete viral genome --- equine foamy virus --- isolation --- Japan --- sero-epidemiology --- reptile foamy virus --- endogenous foamy virus --- endogenous retrovirus --- ancient retroviruses --- co-speciation --- foamy virus-host interactions --- viral tropism --- infection --- kidney --- cats --- chronic kidney disease --- chronic renal disease --- integrase --- integration --- co-infections --- NHP --- pathogenesis --- zoonoses --- viral prevalence --- Neotropical primates --- free-living primates --- Brazil --- new world primates --- simian retrovirus --- BFV --- spuma virus --- model system --- animal model --- animal experiment --- miRNA function --- gene expression --- antiviral host restriction --- gene therapy --- in-vivo gene therapy --- hematopoietic stem and progenitor cells --- foamy virus vector --- pre-clinical canine model --- SCID-X1 --- innate sensing --- cGAS --- STING --- foamy viruses --- wild ruminants --- European bison --- red deer --- roe deer --- fallow deer --- seroreactivity --- inter-species transmission --- HSC --- gene marking --- FV gene transfer to HSCs --- gene therapy alternatives --- serotype --- high-throughput sequencing --- replication kinetics --- cytopathic effect --- reverse transcriptase activity --- miRNA expression --- virus-host-interaction --- miRNA target gene identification --- innate immunity --- ANKRD17 --- Bif1 (SH3GLB1) --- replication in vitro

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This book discusses current evidence on human viruses and provides an extensive coverage of newly emerged viruses and current strategies for treatment. Offering a new perspective in view of the re-emergence of Ebola in African countries and Dengue in India and Pakistan, the contents include chapters on emergence, pathogenicity, epidemiology and vaccine uptake. Human Viruses: Diseases, Treatments and Vaccines: The New Insights discusses a range of viruses from the most common such as Influenza and Hepatitis to Zika, Poliomyelitis and Chikungunya among many others. It is authored by a team of experts on viral disease and will be of immense use to virologists, public health experts and clinicians.

Virus diseases. --- Viral vaccines. --- Virus Diseases. --- Virus Diseases --- Viral Vaccines. --- therapy. --- Viral Vaccine --- Vaccine, Viral --- Vaccines, Viral --- Viral Diseases --- Viral Infections --- Virus Infections --- Disease, Viral --- Disease, Virus --- Diseases, Viral --- Diseases, Virus --- Infection, Viral --- Infection, Virus --- Infections, Viral --- Infections, Virus --- Viral Disease --- Viral Infection --- Virus Disease --- Virus Infection --- Virus vaccines --- Vaccines --- Viral diseases --- Viral infections --- Virus infections --- Communicable diseases --- Medical virology --- Pathogenic viruses --- Malalties víriques --- Infeccions per virus --- Infeccions virals --- Infeccions víriques --- Malalties per virus --- Virosis --- Malalties infeccioses --- Glossopeda --- Grip --- Herpes --- Hepatitis vírica --- Infeccions per coronavirus --- Malaltia de l'Ebola --- Malalties víriques en les plantes --- Ràbia --- Retrovirus --- Virologia veterinària --- Xarampió --- Medicaments antivírics --- Sida en els infants --- Virologia --- Virologia mèdica --- Virus --- Virology. --- Public health. --- Diseases. --- Public Health. --- Human beings --- Illness --- Illnesses --- Morbidity --- Sickness --- Sicknesses --- Medicine --- Epidemiology --- Health --- Pathology --- Sick --- Community health --- Health services --- Hygiene, Public --- Hygiene, Social --- Public health services --- Public hygiene --- Social hygiene --- Human services --- Biosecurity --- Health literacy --- Medicine, Preventive --- National health services --- Sanitation --- Microbiology --- Diseases

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Viruses are microscopic agents that exist worldwide and are present in humans, animals, plants, and other living organisms in which they can cause devastating diseases. However, the advances of biotechnology and next-generation sequencing technologies have accelerated novel virus discovery, identification, sequencing, and manipulation, showing that they present unique characteristics that place them as valuable tools for a wide variety of biotechnological applications. Many applications of viruses have been used for agricultural purposes, namely concerning plant breeding and plant protection. Nevertheless, it is interesting to mention that plants have also many advantages to be used in vaccine production, such as the low cost and low risks they entail, showing once more the versatility of the use of viruses in biotechnology. Although it will obviously never be ignored that viruses are responsible for devastating diseases, it is clear that the more they are studied, the more possibilities they offer to us. They are now on the front line of the most revolutionizing techniques in several fields, providing advances that would not be possible without their existence. In this book there are presented studies that demonstrate the work developed using viruses in biotechnology. These studies were brought by experts that focus on the development and applications of many viruses in several fields, such as agriculture, the pharmaceutical industry, and medicine.

Technology: general issues --- Bacteriophage --- Salmonella --- biocontrol --- comparative genomics --- phage diversity --- grapevine --- apple latent spherical virus vector --- virus-induced flowering --- reduced generation time --- breeding of grapevine --- virus elimination --- Newcastle disease virus --- reverse genetics --- vaccines --- infectious diseases --- cancer --- porcine epidemic diarrhea virus --- VLP --- chemokines --- pig --- vaccine --- SARS-CoV-2 --- COVID-19 --- phages --- CRISPR --- viruses --- prevention --- diagnosis --- treatment --- adeno-associated virus (AAV) vector --- jaagsiekte sheep retrovirus (JSRV) --- LTR --- enhancer --- transduction --- viral vaccines --- cancers --- COVID-19 vaccines --- self-replicating RNA vectors --- DNA-based vaccines --- RNA-based vaccines --- plant virus --- viroid --- viral vector --- virus-induced gene silencing (VIGS) --- CRISPR/Cas9 --- genome editing --- carotenoid biosynthesis --- circular RNA --- infectious bursal disease virus --- immunization --- recombinant Lactococcus lactis --- variant strain --- baculovirus --- insect cells --- bacmid --- Tn7 --- genome stability --- protein expression --- chikungunya virus --- VLPs --- bioreactor --- CRISPR/Cas systems --- viral vectors --- gene editing --- plant genome engineering --- viral resistance --- adeno-associated virus --- AAV --- cancer gene therapy --- prophage --- hydrothermal vent --- Hypnocyclicus thermotrophus --- lytic cassette --- Escherichia coli --- heterologous expression --- codon optimization --- codon harmonization --- expression vectors --- aspect ratio --- VNPs --- TMV --- PVX --- CPMV --- geminivirus --- theranostics --- CRISPR-cas9 --- clodronate --- macrophage --- gene therapy --- gene expression --- nanotechnology