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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1992 Jan 1;89(1):416–420. doi: 10.1073/pnas.89.1.416

Tolerance to a self-protein involves its immunodominant but does not involve its subdominant determinants.

R Cibotti 1, J M Kanellopoulos 1, J P Cabaniols 1, O Halle-Panenko 1, K Kosmatopoulos 1, E Sercarz 1, P Kourilsky 1
PMCID: PMC48248  PMID: 1370355

Abstract

We have produced transgenic mice expression hen egg-white lysozyme (HEL) under the control of a ubiquitous promoter, so that in transgenic animals, HEL is presumably present in the serum and thymus throughout the period of establishment of the T-cell repertoire. We show that HEL transgenic H-2d mice with HEL blood levels greater than 10 ng/ml are tolerant to HEL as well as to the immunodominant peptide 108-116. Thus, their T lymphocytes do not proliferate in response to the immunodominant peptide 108-116 after in vivo immunization with HEL or peptide 108-116. In contrast, in transgenic mice tolerant to HEL, the state of tolerance to subdominant peptides 1-18 and 74-96 appears variable and highly depended on HEL blood levels. Complete unresponsiveness is seen when HEL serum levels are high, and this unresponsiveness is reached at a lower HEL concentration for peptide 1-18 than for peptide 74-96. Thus, a hierarchy exists among the three peptides (108-116 much greater than 1-18 greater than 74-96) for induction of a response to HEL and for HEL tolerance induction in T cells specific for these peptides. Persistence in the periphery of autoreactive T cells recognizing subdominant peptides of self-proteins, as shown in this transgenic model, indicates that self-tolerance is limited to a subset of dominant self-peptides and suggests a role for T lymphocytes specific for subdominant determinants in autoimmunity.

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Selected References

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