title: Modulation of lymphocyte proliferative responses by a canine Lyme disease vaccine of recombinant outer surface protein A (OspA).
abstract: The modulation of human lymphocyte proliferative responses was demonstrated with a recombinant outer surface protein A (OspA) vaccine preparation for the prevention of Borrelia burgdorferi infection. After exposure to either the unaltered vaccine preparation or OspA prepared in saline, normal lymphocyte responses to the mitogens concanavalin A, phytohemagglutinin-M or pokeweed mitogen, or the antigen BCG were consistently reduced. Whole cell extracts of B. burgdorferi also modulated immune responses but required a much greater quantity of protein than needed for the OspA preparation. The magnitude of modulation was directly dependent on the quantity of OspA. OspA interferes with the response of lymphocytes to proliferative stimuli including a blocking of cell cycle phase progression. Future studies designed to delete the particular region or component of the OspA molecule responsible for this effect may lead to improved vaccine preparations.
authors.affiliation: Department of Medicine, New York Medical College, Valhalla, NY 10595, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Chiao
authors.forename: P
authors.initials: P
authors.lastname: Villalon
authors.forename: I
authors.initials: I
authors.lastname: Schwartz
authors.forename: G P
authors.initials: GP
authors.lastname: Wormser
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000276:immunology* / Q000494:pharmacology; D001425:Bacterial Outer Membrane Proteins / Q000276:immunology* / Q000494:pharmacology; D001428:Bacterial Vaccines / Q000276:immunology* / Q000494:pharmacology; D015748:Borrelia burgdorferi Group / Q000276:immunology*; D002452:Cell Count; D002478:Cells, Cultured; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007111:Immunity, Cellular; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000276:immunology*; D008074:Lipoproteins; D008193:Lyme Disease / Q000517:prevention & control; D008213:Lymphocyte Activation; D008934:Mitogens / Q000494:pharmacology; D011994:Recombinant Proteins / Q000276:immunology
chemical_list: D000954:Antigens, Surface; D001425:Bacterial Outer Membrane Proteins; D001428:Bacterial Vaccines; D008074:Lipoproteins; D008934:Mitogens; C072045:OspA protein; D011994:Recombinant Proteins