Inducible nonlymphoid expression of Fas ligand is responsible for superantigen-induced peripheral deletion of T cells

Emanuela Bonfoco, Patrick M. Stuart, Thomas Brunner, Tesu Lin, Thomas S. Griffith, Yakun Gao, Hiroo Nakajima, Pierre A. Henkart, Thomas A. Ferguson, Douglas R. Green

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Abstract

Fas (CD95) and Fas ligand (FasL) play major roles in staphylococcal enterotoxin B (SEB)-induced peripheral deletion of Vβ8+ T cells. We found that peripheral deletion was defective in radiation chimeras with nonfunctional tissue FasL, regardless of the FasL status of the bone marrow- derived cells. SEB induced a dramatic upregulation of FasL expression and function in nonlymphoid cells of liver and small intestine. This effect was resistant to inhibition by cyclosporin A, which also failed to inhibit peripheral deletion. In SCID animals nonlymphoid tissues did not express FasL in response to SEB unless transplanted lymphocytes were present. Thus, some immune responses induce FasL in nonlymphoid tissues, which in turn kills activated lymphocytes, leading to peripheral T cell deletion.

Original languageEnglish
Pages (from-to)711-720
Number of pages10
JournalImmunity
Volume9
Issue number5
DOIs
StatePublished - Nov 1998

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    Bonfoco, E., Stuart, P. M., Brunner, T., Lin, T., Griffith, T. S., Gao, Y., Nakajima, H., Henkart, P. A., Ferguson, T. A., & Green, D. R. (1998). Inducible nonlymphoid expression of Fas ligand is responsible for superantigen-induced peripheral deletion of T cells. Immunity, 9(5), 711-720. https://doi.org/10.1016/S1074-7613(00)80668-8