Cutting edge: Dependence of TCR antagonism on Src homology 2 domain-containing protein tyrosine phosphatase activity

Neely E. Kilgore, Jenny D. Carter, Ulrike Lorenz, Brian D. Evavold

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The mechanism by which antagonist peptides inhibit T cell responses is unknown. Mice deficient in Src homology 2 domain-containing protein tyrosine phosphatase (SHP-1) have revealed its importance in the negative regulation of lymphocyte signaling. We investigated a possible role for SHP-1 in T cell antagonism and demonstrate, for the first time, a substantial increase in SHP-1 activity during antagonism of CD4+ T cells. Furthermore, the removal of functional SHP-1 prevents antagonism in these cells. Our data demonstrate that T cell antagonism occurs via a negative intracellular signal that is mediated by SHP-1.

Original languageEnglish
Pages (from-to)4891-4895
Number of pages5
JournalJournal of Immunology
Volume170
Issue number10
DOIs
StatePublished - May 15 2003

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