title: Immunogenicity of a mycobacterial T-cell epitope expressed in outer membrane protein PhoE of Escherichia coli.
abstract: The outer membrane protein PhoE of Escherichia coli can be used for the expression of foreign antigenic determinants. Previously, a T-cell epitope of the 65 kDa heat shock protein (hsp65) of Mycobacterium tuberculosis, comprising amino acids 180 to 188, was expressed in PhoE. The hybrid protein induced proliferation of epitope-specific T-cell clones in vitro. In this report, the potential of the hybrid protein to induce an in vivo T-cell response against the 180-188 T-cell epitope was assessed. Popliteal lymph node cells, isolated from rats immunized with PhoE containing the hsp65 epitope, showed high proliferative responses to a synthetic peptide consisting of amino acids 180 to 188 of hsp65, indicating that the epitope is immunogenic in the PhoE-associated conformation.
authors.affiliation: Institute of Molecular Biology and Medical Biotechnology, University of Utrecht, The Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Janssen
authors.forename: M
authors.initials: M
authors.lastname: Wauben
authors.forename: R
authors.initials: R
authors.lastname: van der Zee
authors.forename: J
authors.initials: J
authors.lastname: Tommassen
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000096:biosynthesis / Q000276:immunology*; D001426:Bacterial Proteins; D018834:Chaperonin 60; D018833:Chaperonins; D000939:Epitopes / Q000276:immunology*; D004926:Escherichia coli / Q000276:immunology / Q000378:metabolism*; D029968:Escherichia coli Proteins; D006360:Heat-Shock Proteins / Q000096:biosynthesis / Q000276:immunology*; D007114:Immunization; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology; D008213:Lymphocyte Activation; D008297:Male; D009169:Mycobacterium tuberculosis / Q000276:immunology*; D010446:Peptide Fragments / Q000138:chemical synthesis / Q000276:immunology; D018272:Porins / Q000096:biosynthesis / Q000276:immunology*; D051381:Rats; D011917:Rats, Inbred Lew; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis / Q000276:immunology*; D016176:T-Lymphocyte Subsets / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D018834:Chaperonin 60; D000939:Epitopes; D029968:Escherichia coli Proteins; D006360:Heat-Shock Proteins; D010446:Peptide Fragments; D018272:Porins; D011993:Recombinant Fusion Proteins; C074119:heat-shock protein 65, Mycobacterium; C082922:PhoE protein, E coli; D018833:Chaperonins