0000000001102841

AUTHOR

Clemens Jäger

showing 2 related works from this author

T cells expressing a chimeric antigen receptor that binds hepatitis B virus envelope proteins control virus replication in mice.

2013

Background & Aims Antiviral agents suppress hepatitis B virus (HBV) replication but do not clear the infection. A strong effector T-cell response is required to eradicate HBV, but this does not occur in patients with chronic infection. T cells might be directed toward virus-infected cells by expressing HBV-specific receptors and thereby clear HBV and help to prevent development of liver cancer. In mice, we studied whether redirected T cells can engraft after adoptive transfer, without prior T-cell depletion, and whether the large amounts of circulating viral antigens inactivate the transferred T cells or lead to uncontrolled immune-mediated damage. Methods CD8 + T cells were isolated from m…

Adoptive cell transferHepatitis B virusRecombinant Fusion ProteinsReceptors Antigen T-CellMice TransgenicAdoptive T-Cell TherapyCD8-Positive T-Lymphocytesmedicine.disease_causeVirus ReplicationInterleukin 21MiceViral Envelope ProteinsmedicineCytotoxic T cellAnimalsHumansIL-2 receptorAntigen-presenting cellHepatitis B virusCD40HepatologybiologyZAP70Gastroenterologyvirus diseasesHepatocellular CarcinomaVirologyMolecular biologyAdoptive TransferMice Inbred C57BLLiverbiology.proteinImmunotherapyChronic Hepatitis BGastroenterology
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Protein-prime/modified vaccinia virus Ankara vector-boost vaccination overcomes tolerance in high-antigenemic HBV-transgenic mice

2015

Abstract Background Therapeutic vaccination is a novel treatment approach for chronic hepatitis B, but only had limited success so far. We hypothesized that optimized vaccination schemes have increased immunogenicity, and aimed at increasing therapeutic hepatitis B vaccine efficacy. Methods Modified Vaccinia virus Ankara (MVA) expressing hepatitis B virus (HBV) antigens was used to boost protein-prime vaccinations in wildtype and HBV-transgenic (HBVtg) mice. Results Protein-prime/MVA-boost vaccination was able to overcome HBV-specific tolerance in HBVtg mice with low and medium but not with high antigenemia. HBV-specific antibody titers, CD8+ T-cell frequencies and polyfunctionality inverse…

CD4-Positive T-Lymphocytes0301 basic medicineHBsAgHepatitis B vaccineImmunization SecondaryMice TransgenicVaccinia virusCD8-Positive T-Lymphocytesmedicine.disease_cause03 medical and health scienceschemistry.chemical_compoundAntigenNeutralization TestsImmune ToleranceAnimalsMedicineHepatitis B VaccinesHepatitis B e AntigensHepatitis B AntibodiesHepatitis B virusHepatitis B Surface AntigensGeneral VeterinaryGeneral Immunology and Microbiologybusiness.industryImmunogenicityPublic Health Environmental and Occupational Healthvirus diseasesHepatitis BHepatitis Bmedicine.diseaseAntibodies NeutralizingHepatitis B Core AntigensVirologyMice Inbred C57BLVaccination030104 developmental biologyInfectious DiseaseschemistryImmunologyMolecular MedicineVacciniabusinessVaccine
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