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© Artur Scherf
Scanning Electron Microscopy of Red Blood Cell infected by Plasmodium falciparum.
Publication : Seminars in immunology

Regulation of T cell function by Mtv-7 gene products

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Seminars in immunology - 01 Oct 1992

Hoffmann MK, Dannecker G, Mecheri S

Link to Pubmed [PMID] – 1336683

Semin. Immunol. 1992 Oct;4(5):337-51

Mls-1, a superantigen encoded by the endogenous mouse mammary tumor virus Mtv-7 induces immunological tolerance through deletion of antigen-reactive T cells. A remarkable difference between this self-antigen and self-MHC antigens is that while the mouse establishes tolerance against self MHC antigens by the time of birth it does not begin to delete T cells specific for the self-superantigen until they had mounted an immuneresponse against it. An immune response occurs normally several days after birth and may be delayed experimentally for weeks before the deletion process ensues. However, for effective deletion of Mls-1 reactive T cells the mouse must be exposed to Mtv-7 positive lymphoid cells within hours after birth. In reviewing here data obtained in this and other laboratories regarding experimental induction of Mls-1 tolerance in neonatal mice we are trying to make a case for the involvement of Mtv-7 encoded antigens distinct from the superantigen. We propose that T cells reactive with non superantigenic Mtv-7 determinants pose a threat to the establishment of chimaerism between Mls-1- neonates and Mls-1+ inocula, as they may cause the rejection of Mls-1 superantigen bearing lymphocytes. Chimaerism is essential for the establishment of lasting Mls-1 tolerance.

http://www.ncbi.nlm.nih.gov/pubmed/1336683