title: Characterization of suppressor T-cells induced with concanavalin A in vivo by cell electrophoresis.
abstract: The splenic T-cells of concanavalin A (Con-A)-injected mice suppressed the in vitro Con A-induced splenic blastogenesis of normal mice. We examined electrophoretic mobilities (EPM) and surface markers of Con A-induced suppressor T-cells as a model of suppressor T-cells. The EPM of the suppressor cells with both Thy-1 and gangliotetraosyl-ceramide (asialo GM1) was lower than that of normal T-cells. The ratio of low mobility T-cells (LMT) to high mobility T-cells (HMT) correlated significantly with dose-response and time-course of Con A in the suppressor activity and with the percentages of cells carrying asialo GM1 antigen and receptor for peanut agglutinin. For in vitro induction by Con A, Lyt-2+ cells were reported to have suppressor activity. However, for in vivo induction by Con A, Lyt-2+ cells did not correlate with the suppressor activity in the dose-response and time-course experiments. By separating the Lyt-subsets, it was found that both Lyt-1+2+ and Lyt-1+2- subsets were suppressor cells in the blastogenesis. The suppressor activity of in vivo Con A-induced spleen cells correlated with the LMT/HMT ratio, but not with the analysis of Lyt-phenotype. These results suggested that lymphocytes electrophoresis clearly distinguished Con A-induced suppressor T-cells with low EPM from normal T-cells.
authors.affiliation: Department of Cancer Therapeutics, Tokyo Metropolitan Institute of Medical Science, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Shimizu
authors.forename: M
authors.initials: M
authors.lastname: Nakamura
authors.forename: T
authors.initials: T
authors.lastname: Kataoka
authors.forename: T
authors.initials: T
authors.lastname: Iwaguchi
mesh_terms: D000818:Animals; D003208:Concanavalin A / Q000494:pharmacology*; D004586:Electrophoresis; D005455:Fluorescent Antibody Technique; D066298:In Vitro Techniques; D051379:Mice; D008807:Mice, Inbred BALB C; D008811:Mice, Inbred DBA; D013154:Spleen / Q000166:cytology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D013997:Time Factors
chemical_list: D003208:Concanavalin A