Search results for "Influenza Virus"

showing 10 items of 29 documents

T-T cell interactions during in vitro cytotoxic T lymphocyte responses. III. Antigen-specific T helper cells release nonspecific mediator(s) able to …

1980

T helper cell induction and the specificity of T cell-mediated help as generated during alloreactive and H-2-restricted, virus- or hapten-specific cytotoxic T lymphocyte (CTL) responses have been compared. With the use of a double-chamber culture system, it was possible to dissect and separately analyze the induction phase of T helper cells from the T helper cell effector function. The data obtained revealed that during alloreactive as well as H-2-restricted T cell responses, antigen-specific T helper cells are induced. Upon specific restimulation of T helper cells, helper cell function is mediated across a cell-impermeable membrane via soluble products in an apparently nonspecific and nonr…

Cytotoxicity ImmunologicIsoantigensCell Membrane PermeabilityT cellT-LymphocytesImmunologyCellLymphocyte CooperationStreptamerBiologyInterleukin 21EpitopesMicemedicineImmunology and AllergyCytotoxic T cellAnimalsAntigen-presenting cellMice Inbred BALB CH-2 AntigensT helper cellCell biologyParainfluenza Virus 1 HumanMice Inbred C57BLCTL*medicine.anatomical_structureSolubilityTrinitrobenzenesMice Inbred CBAEuropean journal of immunology
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Virion Antigens Introduced Exogeneously into the Cell Membrane Render Syngeneic Target Cells Susceptible for T Cell-Mediated Cytolysis

1977

Non-infectious sendai virus renders H-2 matched target cells susceptible to the lytic effect of sendai virus immune cytotoxic T lymphocytes. This observation suggests that exogeneous insertion of virion antigen in the membrane of the target cell is sufficient for T cell cytotoxicity. The finding is incompatible with the concept that H-2K or H-2D gene products of the target cells must be altered in their primary structure (pretranslational effect of the virus infection) for T cell-mediated cytolysis to occur.

Cytotoxicity ImmunologicMacrophagesT-LymphocytesvirusesGeneral MedicineBiologybiology.organism_classificationMolecular biologyVirusSendai virusParainfluenza Virus 1 HumanCell membraneMiceCytolysismedicine.anatomical_structureImmune systemAntigenLytic cycleAntibody SpecificityHistocompatibility AntigensMice Inbred CBAmedicineAnimalsCytotoxic T cellAntigens ViralZeitschrift für Immunitätsforschung: Immunobiology
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T cell-mediated cytotoxic immune responsiveness of chimeric mice bearing a thymus graft fully allogeneic to the graft of lymphoid stem cells

1980

Fully allogeneic, chimeric mice were established by adult thymectomy of (A × B) F1animals, grafting parental A-type thymus under the kidney capsula, followed by lethal (900 rd) irradiation and reconstitution with B parental-type bone marrow cells treated with xenogeneic anti-T cell antiserum plus complement. Following in vivo sensitization with inactivated Sendai virus (SV) suspensions, no virus-specific T cells could be detected within the spleen cells of the mice. Upon stimulation with third-party allogeneic cells in a primary mixed lymphocyte culture, spleen cells of all animals generated alloreactive cytotoxic T lymphocytes (CTL). More interestingly, upon secondary in vitro stimulation …

Cytotoxicity ImmunologicT-LymphocytesT cellImmunologySpleenThymus GlandBiologyMiceImmune systemBone MarrowmedicineAnimalsImmunology and AllergyCytotoxic T cellLymphocytesMice Inbred BALB CChimeraMolecular biologyParainfluenza Virus 1 HumanMice Inbred C57BLCTL*medicine.anatomical_structureRadiation ChimeraImmunologyMice Inbred CBALymphoid Progenitor CellsBone marrowStem cellEuropean Journal of Immunology
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Homologous recombination as a mechanism of genetic changes in bovine parainfluenza-3 virus

2021

Bovine parainfluenza-3 virus (BPIV-3) is one of the main viruses associated with bovine respiratory disease complex (BRDC) worldwide. BPIV-3 infect the bovine respiratory tract causing from subclinical infections to severe pneumonia with significant economic losses in the cattle industry. BPIV-3 is a RNA virus with high genetic variability, nevertheless, the contribution of recombination events to its variability has not been assessed so far. In this study the 25 complete genome sequences (CGS) reported so far and 215 partial sequences of different viral genes of BPIV-3 were analyzed to determine their genotypes and subgenotypes, distribution, and the existence of potential recombination ev…

GenotypeCattle DiseasesSheep DiseasesBiologyRespirovirus InfectionsMicrobiologyGenomeVirusViral ProteinsAnimalsGenetic variabilityHomologous RecombinationGeneParainfluenza Virus 3 BovinePhylogenyGeneticsSheepGeneral VeterinaryPhylogenetic treeGenetic VariationRNA virusGeneral Medicinebiology.organism_classificationBovine Respiratory Disease ComplexCattleHomologous recombinationVeterinary Microbiology
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Genotyping of a nosocomial outbreak of pandemic influenza A/H1N1 2009

2011

Background: Epidemiological surveys have revealed outbreaks of pandemic influenza A (H1N1) 2009 in several different contexts. Molecular characterization of the influenza virus could help to provide a more accurate description of these outbreaks. Objective: To genotype pandemic influenza A (H1N1) 2009 isolates from an epidemiologically defined nosocomial outbreak. Study design: We sequenced the neuraminidase (NA) and hemagglutinin (HA) influenza A (H1N1) 2009 genes from ten HIV-positive patients involved in an epidemiologically defined outbreak in the Clinical Microbiology and Infectious Diseases (CMID) Department. Sequences were aligned to search for specific genetic features of the involv…

Genotyping TechniquesGenotypeMolecular Sequence DataNeuraminidaseHemagglutinin Glycoproteins Influenza VirusContext (language use)medicine.disease_causePandemic H1N1Disease OutbreaksViral ProteinsInfluenza A Virus H1N1 SubtypeVirologyPandemicHIV SeropositivityInfluenza HumanInfluenza A virusmedicineHumansViral ProteinSequencingHemagglutinin Glycoproteins Influenza ViruPandemicsGenotypingPhylogenyCross InfectionDisease OutbreakbiologyPandemicCoinfectionTransmissibilityOutbreakvirus diseasesOutbreakVirologyInfluenza A virus subtype H5N1Infectious DiseasesAmino Acid SubstitutionMutationbiology.proteinHuman mortality from H5N1Genotyping TechniqueNeuraminidaseHuman
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Rapid sequencing and genetic analysis of the pandemic (H1N1)V influenza virus circulating in pigs in Italy

2011

will continue to pose challenge to public health and scientifi c community. General concern exists about possible mutation or reassortment between the H1N1pdm and infl uenza viruses circulating in human and animal, giving rise to more transmissible or pathogenic viruses. Emergence of resistance during antiviral treatment is a wellrecognised phenomenon in infl uenza viruses; surveillance for emergence of resistant viruses is of importance for monitoring this potential public health problem in the context of the H1N1 pandemic. Thus preparedness to identify new strains would require fast sequencing of the full genome of virus. Here we present an optimised workfl ow for rapid sequencing of the …

Influenza viruses H1N1 pandemic rapid sequencing of the entire genome genetic surveillance activity pigs
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SARS CoV2 infection _The longevity study perspectives

2021

Graphical abstract

MaleAgingssRNA single-stranded RNARFLP restriction fragment length polymorphismHSPs heat shock proteinsReviewPTMs post-translational modificationsSevere Acute Respiratory SyndromeBiochemistryHIV-1 human immunodeficiency virus-1TNF-α tumor necrosis factor-αEC endothelial cells0302 clinical medicineFluAV influenza A virusI insertionMedicineIFN-γ interferon-γDIC disseminated intravascular coagulationPCR Polymerase Chain Reactionmedia_commonAged 80 and overLongevityRBD receptor-binding domainNeurologyLongevity modelMI myocardial infarctionNK natural killerhPIV2 human parainfluenza virus type 2media_common.quotation_subjectResearching genetic basis of resistance and potential pharmacological targetsLongevityDBP diastolic blood pressureNF-Kb nuclear transcription factor kBRANTES regulated upon activation normal T cell expressed and secretedMphi human macrophages03 medical and health sciencesCox 2 cyclooxygenase 2ORF open reading framePT prothrombin timeSettore MED/05 - Patologia ClinicaHumansMolecular BiologyInflammatory genesARDS acute respiratory distress syndromeNO nitric oxideD deletionCpGIs CpG islandsT2DM type 2 diabetes mellitusmedicine.diseaseFDP fibrin degradation products030104 developmental biologySARS CoV2 severe acute respiratory syndrome Coronavirus 2 virusImmunologyBMI body max indexItalian nonagenarians/centenariansRSV respiratory syncytial virusComplication030217 neurology & neurosurgeryMAPK mitogen-activated protein kinaseIP-10 IFN-γ -Inducible Protein 1040301 basic medicineAT1R activity of angiotensin 1 receptorsDCs dentritic cellsSSCP single strand conformation polymorphismACE/DD polymorphism of the angiotensin converting enzymeFGF21 fibroblast growth factor 21TLR4 toll-like receptor 4NAD nicotinamide adenine dinucleotideACE angiotensin-I converting enzymeAT2R activity of angiotensin 2 receptorsCOVID-19 Coronavirus disease 2019Respiratory distressACE2 angiotensin converting enzyme 2MKP-1 mitogen-activated protein kinase phosphatase-1 ()PD protease domainSNP single nucleotide polymorphismEH essential hypertensionTNFR tumor necrosis factor receptorINR international normalized ratio of the prothrombin timePAI-1 plasminogen activator inhibitor-1Ang angiotensinLPS lipopolysaccharideMCP1 monocyte chemoattractant protein-1medicine.symptomaPTT partial thromboplastin timeBiotechnologyDUSP1 dual specificity phosphatase 1Coronavirus disease 2019 (COVID-19)PC prostate cancerRAS renin-angiotensin aldosterone systemCCR5Δ32 genetic variant of chemokine receptorCOVID-19 Researching genetic basis of resistance and potential pharmacological targets Italian nonagenarians/centenarians Longevity modelAsymptomaticSARS-1 severe acute respiratory syndrome virus 1SIRT-1 Sirtuin 1Th1 t-helper lymphocyte type 1Immune systemROS reactive oxygen speciesTGF-β transforming growth factor betaET-1 endothelin-1ComputingMethodologies_COMPUTERGRAPHICSADAM-17 metallopeptidase domain 17business.industrySARS-CoV-2SBP systolic blood pressureCOVID-19HDACs histone deacetylasesComorbidityImmune Systembusiness5-LO lipoxygenase 5Ageing Research Reviews
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Transmission of hemagglutinin D222G mutant strain of pandemic (H1N1) 2009 virus.

2010

A pandemic (H1N1) 2009 virus strain carrying the D222G mutation was identified in a severely ill man and was transmitted to a household contact. Only mild illness developed in the contact, despite his obesity and diabetes. The isolated virus reacted fully with an antiserum against the pandemic vaccine strain.

MaleEpidemiologyvirusesMutantResistancelcsh:MedicineHemagglutinin Glycoproteins Influenza VirusSettore MED/42 - Igiene Generale E Applicatamedicine.disease_causeSeverity of Illness IndexDisease Outbreakschemistry.chemical_compoundInfluenza A Virus H1N1 SubtypePandemicInfluenza A virusA/H1N1PhylogenyTransmission (medicine)H1N1DispatchtransmissionMiddle AgedInfectious DiseasesD222GItalyInfluenza A virusRNA ViralinfluenzaMicrobiology (medical)AdultOseltamivirMutation MissenseHemagglutinin (influenza)BiologyViruslcsh:Infectious and parasitic diseasesMicrobiologyOseltamivirInfluenza HumanmedicineHumanslcsh:RC109-216virusesRetrospective StudiesAntiserumSequence Analysis RNApandemiclcsh:RMutantVirologyInfluenzaH1N1 subtypechemistryAmino Acid Substitutionbiology.proteinA/H1N1vmutationInfluenza; A/H1N1v; Oseltamivir; ResistanceEmerging infectious diseases
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Sociodemographic Factors and Clinical Conditions Associated to Hospitalization in Influenza A (H1N1) 2009 Virus Infected Patients in Spain, 2009–2010

2012

The emergence and pandemic spread of a new strain of influenza A (H1N1) virus in 2009 resulted in a serious alarm in clinical and public health services all over the world. One distinguishing feature of this new influenza pandemic was the different profile of hospitalized patients compared to those from traditional seasonal influenza infections. Our goal was to analyze sociodemographic and clinical factors associated to hospitalization following infection by influenza A(H1N1) virus. We report the results of a Spanish nationwide study with laboratory confirmed infection by the new pandemic virus in a case-control design based on hospitalized patients. The main risk factors for hospitalizatio…

MaleViral DiseasesPediatricsNon-Clinical MedicinePulmonologyEpidemiology:Named Groups::Persons::Age Groups::Adult::Aged::Aged 80 and over [Medical Subject Headings]Grip A (H1N1):Named Groups::Persons::Age Groups::Adult::Middle Aged [Medical Subject Headings]DiseaseSocial and Behavioral Sciencesmedicine.disease_cause:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Statistics as Topic::Probability::Risk::Risk Factors [Medical Subject Headings]Hospital patients:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings]Influenza A Virus H1N1 SubtypeGripe humanaSociologyRisk FactorsPandemicInfluenza A virusChildAged 80 and over:Geographicals::Geographic Locations::Europe::Spain [Medical Subject Headings]:Organisms::Viruses::Vertebrate Viruses::RNA Viruses::Orthomyxoviridae::Influenzavirus A::Influenza A virus::Influenza A Virus H1N1 Subtype [Medical Subject Headings]COPDeducation.field_of_studyMultidisciplinary:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Case-Control Studies [Medical Subject Headings]:Named Groups::Persons::Age Groups::Child::Child Preschool [Medical Subject Headings]QRMiddle AgedHospitalizationInfectious Diseases:Analytical Diagnostic and Therapeutic Techniques and Equipment::Therapeutics::Patient Care::Hospitalization [Medical Subject Headings]Child Preschool:Named Groups::Persons::Age Groups::Adolescent [Medical Subject Headings]MedicineFemalePublic Health:Named Groups::Persons::Age Groups::Infant [Medical Subject Headings]Assistència hospitalàriaResearch ArticleAdultmedicine.medical_specialtyAdolescent:Named Groups::Persons::Age Groups::Adult::Young Adult [Medical Subject Headings]SciencePopulationHospitals -- Pacients:Check Tags::Male [Medical Subject Headings]:Named Groups::Persons::Age Groups::Infant::Infant Newborn [Medical Subject Headings]InfluenzavirusVirusYoung AdultInfluenza HumanSubtipo H1N1 del Virus de la Influenza A:Named Groups::Persons::Age Groups::Adult [Medical Subject Headings]medicineInfluenza virusesHumansEpidemiologia -- Investigació -- EspanyaEspanyaEpidemiologiaeducationPandemicsBiology:Named Groups::Persons::Age Groups::Child [Medical Subject Headings]AgedHospital carePopulation Biologybusiness.industryPublic healthInfant NewbornCase-control studyInfant:Health Care::Environment and Public Health::Public Health::Disease Outbreaks::Epidemics::Pandemics [Medical Subject Headings]medicine.disease:Check Tags::Female [Medical Subject Headings]SpainCase-Control StudiesH1N1 influenza:Diseases::Virus Diseases::RNA Virus Infections::Orthomyxoviridae Infections::Influenza Human [Medical Subject Headings]businessPLoS ONE
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Comparison of the BD Directigen Flu A+B Kit and the Abbott TestPack RSV with a multiplex RT-PCR ELISA for rapid detection of influenza viruses and re…

2005

ABSTRACTThe Directigen Flu A+B enzyme immunoassay and the Abbott TestPack RSV enzyme immunoassay were each compared with a multiplex RT-PCR ELISA by testing 635 nasopharyngeal aspirates collected from children aged < 16 years who had been hospitalised with acute respiratory tract infection during the epidemic season 2002–2003. In this study, the sensitivity of the Directigen Flu A+B assay was unacceptably low (29.3% and 10.0%, respectively) for the detection of influenza A and B viruses. The sensitivity of the Abbott TestPack RSV assay (77.4%) was acceptable and in agreement with the multiplex RT-PCR ELISA.

Microbiology (medical)Paramyxoviridaerespiratory syncytial virusrespiratory tract infectionEnzyme-Linked Immunosorbent AssayPolymerase Chain ReactionSensitivity and Specificityinfluenza virusVirusAssaysMicrobiologyPneumovirinaeNasopharynxMultiplex polymerase chain reactionmedicineMultiplexProspective StudiesMononegaviralesbiologymedicine.diagnostic_testReverse Transcriptase Polymerase Chain Reactionvirus diseasesGeneral Medicinebiology.organism_classificationenzyme immunoassayVirologyInfluenza B virusInfectious Diseasesmultiplex RT-PCRInfluenza A virusRespiratory Syncytial Virus HumanImmunoassayReagent Kits DiagnosticViral diseaseClinical Microbiology and Infection
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