The effector functions of mature T lymphocytes are impaired in transgenic mice expressing the SH2 domain of TSAd/Lad

Youngbong Choi, Eunkyung Park, Eunseon Ahn, Inyoung Park, Yungdae Yun

Research output: Contribution to journalArticlepeer-review

Abstract

TSAd/Lad is a T cell adaptor molecule involved in p56lck -mediated T cell activation. To investigate the functions of TSAd in T cells, we generated transgenic (TG) mice expressing the SH2 domain of TSAd (TSAd-SH2) under the control of the p56lck proximal promoter. In T cells from TSAd-SH2 TG mice, T cell receptor (TCR)-mediated early signaling events, such as Ca2+ flux and ERK activation, were normal; however, late activation events, such as IL-2 production and proliferation, were significantly reduced. Moreover, TCR-induced cell adhesion to extracellular matrix (ECM) proteins and migration through ECM proteins were defective in T cells from TSAd-SH2 TG mice. Furthermore, the contact hypersensitivity (CHS) reaction, an inflammatory response mainly mediated by T helper 1 (Th1) cells, was inhibited in TSAd-SH2 TG mice. Taken together, these results show that TSAd, particularly the SH2 domain of TSAd, is essential for the effector functions of T cells.

Original languageEnglish (US)
Pages (from-to)183-188
Number of pages6
JournalMolecules and cells
Volume28
Issue number3
DOIs
StatePublished - Oct 7 2009
Externally publishedYes

Keywords

  • Adhesion
  • Lad
  • Migration
  • SH2 domain
  • TSAd

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

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