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. 1988 Feb;63(2):205–212.

Induction of tolerance towards TNP entails down-regulation of an autoimmune attack.

M Zöller 1, G Andrighetto 1
PMCID: PMC1454534  PMID: 2965095

Abstract

In order to follow the process of induction and maintainance of tolerance, BALB/c mice were tolerized by free hapten, and effector and regulatory cell interactions were analysed by limiting-dilution (LD) cultures. Injection of trinitrobenzenesulphonic acid (TNBS) resulted, predominantly, in the activation and expansion of self-reactive cytotoxic T cells (CTL), which were observed transiently at frequencies comparable to allo-specific CTL. In addition, self-reactive helper T cells (Th) were activated and expanded in tolerized mice. TNP-specific reactivity was difficult to evaluate, since cytotoxic activity against haptenized self followed the pattern of self-reactivity throughout the test period. But in LD cultures determining proliferation, two populations of Th responding to TNP-self were observed, while only one Th population could be detected in response to self. Expansion/activation of Th and CTL precursors (CTLp) was followed by activation of suppressor T cells (Ts). The suppressor population could be divided into two subpopulations, one interfering with Th, the second interacting directly with CTL (veto cells). The results indicate that during the induction of tolerance, animals pass through an autoimmune attack, with expansion and activation of self-reactive clones (CTL, Th). The final status of non-responsiveness towards TNP is not due to the deletion of effector or regulatory cells, but results from the establishment of a steady state of dominance of self-reactive and TNP-self-reactive suppression.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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