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- W1522230236 abstract "When trinitrobenzenesulfonic acid (TNBS), the reactive form of trinitrophenyl (TNP) hapten, is injected into a mouse, a brief intrinsic B-cell tolerance to TNP has been shown to result. Yet antigen-binding cells (ABC) with receptors for TNP persist in the TNBS-treated animal. After treatment with Pronase under conditions preserving cell recovery and viability, 80–90% of TNP-ABC failed to bind antigen. After 2 hr in vitro, Pronase-treated 4-day immune TNP-ABC displayed significant recovery of antigen binding, whereas nonimmune TNP-ABC performed the same feat by 18 hr. However, TNP-ABC tested 2 to 11 days after TNBS failed to replace digested receptors by 18 hr in vitro. Thirty days after TNBS, they had recovered this ability. This defective receptor replacement by TNP-ABC was not reversed by colchicine, and was not shared by the sheep-erythrocyte ABC of the same animals, which replaced receptors normally. When challenged with antigen (TNP-sheep erythrocytes) simultaneously with TNBS, recovery by 2 hr was evident on Day 11. When challenged with antigen 4 days after TNBS, receptor regeneration had returned to normal by the next day, and partial recovery of the anti-TNP plaque-forming cell response was evident 4 days later. Thus, the inability to replace receptors and immune unresponsiveness coincides in time, so that a causal relationship between these two defects may be hypothesized. This result contrasts with the membrane locking defect, previously described in the TNP-ABC of TNBS-treated animals, which far outlasted the unresponsive state." @default.
- W1522230236 created "2016-06-24" @default.
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- W1522230236 date "1980-05-01" @default.
- W1522230236 modified "2023-10-18" @default.
- W1522230236 title "Membrane defects of the tolerant B cell" @default.
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- W1522230236 doi "https://doi.org/10.1016/0008-8749(80)90268-3" @default.
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