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- W2033641844 abstract "We have previously shown that suppressor-T-cell (TS) activity in the spleens of autoimmune MRL/Mp-lpr/lpr (MRL/l) mice is increased after 2 months of age. The TS suppress the in vitro primary IgM response to the thymus-dependent (TD) antigen sheep erythrocytes (SRBC) of B and T cells from young congenic MRL/Mp-+/+ (MRL/n) mice which lack the lymphoproliferation (lpr) gene. The TS are nylon wool nonadherent, Thy 1.2 positive, and radiation sensitive. The studies presented here were done to further characterize the TS and to attempt to determine the mechanism of action of these cells. We found that increased TS activity was also present in the proliferating lymph nodes of old MRL/l mice but not in lymph nodes of young MRL/l or MRL/n mice. The splenic TS equally suppressed the primary IgM SRBC response of both young MRL/l and MRL/n B and T cells, indicating that MRL/l SRBC-specific B and T cells are not resistant to suppression. The IgM response of MRL/n B and T cells to the T-independent (TI) antigen trinitrophenyl conjugated to Brucella abortus (TNP-BA) was not suppressed by the TS, although the IgM response to TNP was suppressed when TNP was coupled to the TD carrier SRBC. The results of kinetics studies of TS expression showed that when the TS were added on Day 0 of culture the SRBC response was suppressed as early as Day 2 of culture; however, when the TS were added on Days 1, 2, or 3 of culture, the suppression was reduced. The TS suppressed the in vitro memory IgG response of spleen cells from MRL/n mice which had been primed with SRBC; the memory IgG responses of spleen cells from MRL/l mice were variably suppressed. Taken together, these results suggest that the TS suppress TH function in early events of antibody production and that some activated B or T cells may be resistant to the effects of the TS. Increased TS activity was not present in the spleens of aged New Zealand Black X NZ White (NZB/W) F1 mice. Possible reasons for the presence of increased TS activity in MRL/l mice and its relation to autoimmune disease is discussed." @default.
- W2033641844 created "2016-06-24" @default.
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- W2033641844 date "1985-12-01" @default.
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- W2033641844 title "Suppressor T-cell activity in MRL/Mp-lpr/lpr mice: Differential effects on primary and memory antibody responses of MRL/Mp-lpr/lpr and MRL/Mp-+/+ spleen cells to thymus dependent and thymus independent antigens in vitro" @default.
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- W2033641844 doi "https://doi.org/10.1016/0008-8749(85)90363-6" @default.
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