title: Augmentation by Corynebacterium liquefaciens of erythrocyte surface H-2 expression and alloimmunogenicity for antibody responses.
abstract: Intravenous injection of killed Corynebacterium liquefaciens induced a population of red blood cells that expressed both H-2K and H-2D antigens at exceptionally high density and displayed augmented immunogenicity for H-2 alloantigen-specific B cell activation. Injection of killed Escherichia coli or E. coli lipopolysaccharide was ineffective for the generation of such RBC. RBC that express H-2 antigens at high density first appeared at 7 days after injection of C. liquefaciens. These RBC persisted for more than 50 days, although they lost H-2 antigens gradually with time. The observed phenomenon was not due to enhanced erythropoiesis and peripheral release of immature RBC (reticulocytes); populations of both mature and immature RBC of mice injected with C. liquefaciens expressed H-2 antigens at high density, whereas those from normal mice or mice injected with phenyl hydrazine did not. Appearance of RBC expressing H-2 antigens at high density was preceded by a temporal increase in H-2 expression of bone marrow cells that included precursors of RBC. It was concluded that RBC expressing H-2 antigens at high density were descendants of bone marrow cells whose H-2 expression was augmented by C. liquefaciens. The present communication would be the 1st report of the bacteria-mediated augmentation of cell surface expression and activity of major-histocompatibility-complex class I antigens on host cells in vivo.
authors.affiliation: Department of Immunology, Nagoya University School of Medicine, Aichi, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
authors.forename: I
authors.initials: I
authors.lastname: Nakashima
authors.forename: T
authors.initials: T
authors.lastname: Yokochi
authors.forename: K
authors.initials: K
authors.lastname: Mizoguchi
authors.forename: R N
authors.initials: RN
authors.lastname: Ding
authors.forename: N
authors.initials: N
authors.lastname: Kato
authors.forename: K
authors.initials: K
authors.lastname: Isobe
authors.forename: F
authors.initials: F
authors.lastname: Nagase
authors.forename: K
authors.initials: K
authors.lastname: Ando
authors.forename: T
authors.initials: T
authors.lastname: Iwamoto
mesh_terms: D000818:Animals; D000917:Antibody Formation; D001402:B-Lymphocytes / Q000276:immunology; D001853:Bone Marrow / Q000276:immunology; D001854:Bone Marrow Cells; D003352:Corynebacterium / Q000276:immunology*; D004910:Erythrocyte Membrane / Q000276:immunology*; D005434:Flow Cytometry; D006183:H-2 Antigens / Q000276:immunology*; D051379:Mice; D012156:Reticulocytes / Q000276:immunology; D013997:Time Factors
chemical_list: D006183:H-2 Antigens