title: Comparative studies on immune responses to infection in susceptible B10.BR mice infected with different strains of the murine nematode parasite Trichuris muris.
abstract: A comparison of immune responses to infection between groups of B10.BR mice infected with different strains of T. muris, S strain (isolated in Sobreda, Portugal), E strain (isolated in Edinburgh), and E-J strain (originally E strain, which has been maintained in our laboratory, Japan), was performed. In mice infected with E and E-J strains, most of the worms were expelled by day 32 after infection, though the expulsion was faster in E-J strain-infected mice. In contrast, no expulsion was observed in S strain-infected mice by day 32 and egg production occurred on day 32. IL-4 production occurred in concanavalin A (Con-A)-stimulated mesenteric lymph node cells (MLNC) from B10.BR mice infected with E and E-J strains, whereas no IL-4 production was observed in S strain-infected mice. IL-4 production did not occur in normal mice. In comparison with normal mice, high levels of IFN-gamma production by Con A-stimulated MLNC were detected in mice infected with every strain of T. muris. IFN-gamma production in S strain-infected mice was greater, occurred earlier and was more persistent than in mice infected with E and E-J strains. IgG1 and IgG2a antibodies to T. muris excretory/ secretory antigens were observed in B10.BR mice infected with every strain of T. muris. Antibody production showed similar kinetics. These differences in the expulsion kinetics and IL-4 production in B10.BR mice infected with S, E, and E-J strains suggest the involvement of IL-4 in protection against T. muris infection, and confirm the previous conclusion by Else et al.
authors.affiliation: Department of Parasitology, Kitasato University School of Medicine, Kanagawa, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Koyama
authors.forename: Y
authors.initials: Y
authors.lastname: Ito
mesh_terms: D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood; D000947:Antigens, Helminth; D003208:Concanavalin A / Q000494:pharmacology; D007074:Immunoglobulin G / Q000097:blood; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D007700:Kinetics; D008198:Lymph Nodes / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D013045:Species Specificity; D014257:Trichuriasis / Q000276:immunology* / Q000469:parasitology / Q000473:pathology; D014258:Trichuris / Q000145:classification / Q000276:immunology*
chemical_list: D000909:Antibodies, Helminth; D000947:Antigens, Helminth; D007074:Immunoglobulin G; D003208:Concanavalin A; D015847:Interleukin-4; D007371:Interferon-gamma