Staphylococcal enterotoxin is a bovine t cell superantigen

Robert Schmaltz, Balbir Bhogal, Yan Yu Wang, Thomas Petro, Swey Shen Chen

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Different isoforms of soluble staphylococcal enterotoxins (SE): SEB, SEC-1 and SEC-2, were shown to stimulate bovine T cell proliferation, expression of cytokine messages, and IgG production. Intact metabolic function of APC was not required since peripheral blood mononuclear cells (PBMC), UV-irradiated prior to or following incubation with SE, were both capable of presenting SE, while PBMC treated with MAbs against MHC II lost the ability to stimulate T cell proliferation. SE caused approximately two fold increase of CD4+, and CD8+ T cells, but not MHC II+ APC or B cells. This model system suggests that SE transduces not only T cell activation signal, but also a non-proliferative signal for primary B cells to produce polyclonal IgG. We hypothesize that enterotoxin virulence may be in part due to its effect on activating the immune system.

Original languageEnglish (US)
Pages (from-to)805-818
Number of pages14
JournalImmunological Investigations
Issue number5
StatePublished - 1995

ASJC Scopus subject areas

  • Immunology


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