title: Angiotensin II is chemotactic for a T-cell subset which can express migration inhibition factor activity in murine schistosomiasis mansoni.
abstract: In murine schistosomiasis mansoni, ova induce a delayed-type hypersensitivity, granulomatous response in which angiotensins are produced. Angiotensin II (AII) elicits a chemotaxis for splenic mononuclear cells derived from these infected animals. The effect of AII upon the migration of a T-lymphocyte subset was defined functionally to further delineate this observation. A chemotaxis chamber was developed that permitted collection of large numbers of viable cells which migrate in response to AII. In a direct migration inhibition factor (MIF) assay, MIF activity was demonstrated with 100-fold fewer chemotactically attracted cells as opposed to whole splenic leukocytes. The MIF activity was eliminated by treatment of the cells with anti-Lyt 1.1 or-Thy 1.2 serum and complement. This observation was particularly interesting since migrated and whole spleen cell populations comprised equal numbers of T cells. Incubation of spleen cells with AII prior to assay did not alter MIF activity. These findings suggest that AII is chemotactic for at least one important T-cell subset relevant to the granulomatous response.
mesh_terms: D000804:Angiotensin II / Q000502:physiology*; D000818:Animals; D002630:Chemotactic Factors; D002634:Chemotaxis, Leukocyte; D005260:Female; D006099:Granuloma / Q000276:immunology; D066298:In Vitro Techniques; D008263:Macrophage Migration-Inhibitory Factors / Q000276:immunology*; D051379:Mice; D008808:Mice, Inbred CBA; D012555:Schistosomiasis mansoni / Q000276:immunology*; D013154:Spleen / Q000166:cytology; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*
chemical_list: D002630:Chemotactic Factors; D008263:Macrophage Migration-Inhibitory Factors; D000804:Angiotensin II