0000000000512635

AUTHOR

Ulrike Liewer

showing 3 related works from this author

The sequence alteration associated with a mutational hotspot in p53 protects cells from lysis by cytotoxic T lymphocytes specific for a flanking pept…

1998

A high proportion of tumors arise due to mutation of the p53 tumor suppressor protein. A p53 hotspot mutation at amino acid position 273 from R to H, flanking a peptide epitope that spans residues 264–272, renders cells resistant to killing by human histocompatibility leukocyte antigen (HLA)-A*0201–restricted cytotoxic T lymphocytes (CTLs) specific for this epitope. Acquisition of the R to H mutation at residue 273 of the human p53 protein promotes tumor growth in vivo by selective escape from recognition by p53.264–272 peptide-specific CTLs. Synthetic 27-mer p53 polypeptides covering the antigenic nonamer region 264–272 of p53 were used as proteasome substrates to investigate whether the R…

Cytotoxicity Immunologicp53Epitopes T-LymphocyteEpitopeSubstrate SpecificityMice0302 clinical medicineTumor Cells CulturedImmunology and AllergyCytotoxic T cellPeptide sequence0303 health sciencesAntigen PresentationproteasomesHydrolysisArticles3. Good healthCysteine Endopeptidasestumor antigensCell DivisionProteasome Endopeptidase ComplexImmunologyAntigen presentationMolecular Sequence DataMice TransgenicBiologyArgininecytotoxic T lymphocytes03 medical and health sciencesAntigenMultienzyme Complexesantigen processingAnimalsHumansPoint MutationHistidineAmino Acid Sequence030304 developmental biologyBinding SitesLinear epitopeHLA-A AntigensPoint mutationCytotoxicity Tests ImmunologicMolecular biologyPeptide FragmentsCTL*Tumor Suppressor Protein p53Peptides030215 immunologyT-Lymphocytes CytotoxicThe Journal of experimental medicine
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The effect of the interferon-γ-inducible processing machinery on the generation of a naturally tumor-associated human cytotoxic T lymphocyte epitope …

2002

The human wild-type (wt) p53.264–272 peptide is a universal tumor antigen and recognized by HLA-A*0201 (A2.1)-restricted CTL. Generation of this epitope by constitutive 20S proteasomes is prevented by a p53 R to H hotspot mutation at the C-terminal flanking residue 273. We report on the impact of the interferon-γ (IFN-γ)-inducible proteasomal activator PA28 (11S regulator) and the immunoproteasome on the in vitro and cellular processing of wt and mutant (mut) p53 substrates. We found that production of the antigenic 264–272 peptide from wt p53 by constitutive as well as immunoproteasomes is accelerated and amplified by the PA28 activator. PA28 and (immuno)proteasomes were not capable to rec…

Activator (genetics)ImmunologyMutantWild typeBiologyMolecular biologyEpitopeTumor antigenCTL*InterferonmedicineImmunology and AllergyCytotoxic T cellmedicine.drugEuropean Journal of Immunology
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Targeting positive regulatory domain I-binding factor 1 and X box-binding protein 1 transcription factors by multiple myeloma-reactive CTL.

2005

Abstract Growing evidence indicates that multiple myeloma (MM) and other malignancies are susceptible to CTL-based immune interventions. We studied whether transcription factors inherently involved in the terminal differentiation of mature B lymphocytes into malignant and nonmalignant plasma cells provide MM-associated CTL epitopes. HLA-A*0201 (A2.1) transgenic mice were used to identify A2.1-presented peptide Ag derived from the plasma cell-associated transcriptional regulators, positive regulatory domain I-binding factor 1 (PRDI-BF1) and X box-binding protein 1 (XBP-1). A2.1-restricted CTL specific for PRDI-BF1 and XBP-1 epitopes efficiently killed a variety of MM targets. PRDI-BF1- and X…

Cytotoxicity ImmunologicX-Box Binding Protein 1Cellular differentiationImmunologyEpitopes T-LymphocyteMice TransgenicRegulatory Factor X Transcription FactorsBiologyEpitopeMiceImmune systemCell Line TumorHLA-A2 AntigenImmunology and AllergyAnimalsHumansTranscription factorAntigen PresentationB-LymphocytesCell DeathT-cell receptorCell DifferentiationCytotoxicity Tests ImmunologicX-Box Binding Protein 1Molecular biologyPeptide FragmentsCell biologyDNA-Binding ProteinsMice Inbred C57BLRepressor ProteinsCTL*Self ToleranceNIH 3T3 CellsPositive Regulatory Domain I-Binding Factor 1Multiple MyelomaCD8T-Lymphocytes CytotoxicTranscription FactorsJournal of immunology (Baltimore, Md. : 1950)
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