Flood PM, Benoist C, Mathis D, Murphy DB. Altered I-J phenotype in E alpha transgenic mice.
Proc Natl Acad Sci U S A 1986;
83:8308-12. [PMID:
2430283 PMCID:
PMC386917 DOI:
10.1073/pnas.83.21.8308]
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Abstract
One of the more intriguing puzzles in immunology is the genetic basis for control of murine T-cell I-J determinants. Molecules bearing I-J determinants (I-J molecules) play a role in information trafficking among immunocompetent cells, probably serving as self-recognition molecules that channel regulatory factors to their appropriate target cells. Although it is clear that I-J polymorphism is influenced by the major histocompatibility complex (MHC), molecular genetic studies provide evidence that an MHC gene does not encode I-J molecules. A possible explanation for this paradox is that I-J molecules are a set of non-MHC-encoded T cell receptors that are directly or indirectly selected for by self-MHC products. One key to resolving the genetic and molecular basis for control of I-J determinants is the identification of the MHC gene(s) involved. Herein, data are presented which show that E alpha transgenic mice express an altered I-J phenotype, providing clear evidence that I region class II genes influence I-J polymorphism. Although further study is required to resolve how class II genes mediate this effect, this is a major piece to the I-J puzzle.
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