Lipid raft assembly and LcK recruitment in TRAIL costimulation mediates NF-κB activation and T cell proliferation

Shih Chia Huang, Huei-Fang Tsai, Horng Tay Tzeng, Hsiu Jung Liao, Ping Ning Hsu

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The TNF-related apoptosis-inducing ligand was shown to provide a costimulatory signal that cooperates with the TCR/CD3 complex to induce T cell proliferation and cytokine production. Although a number of signaling pathways were linked to the TCR/CD3 complex, it is not known how these two receptors cooperate to induce T cell activation. In this study, we show that TRAIL-induced costimulation of T cells depends on activation of the NF-κB pathway. TRAIL induced the NF-κB pathway by phosphorylation of inhibitor of κB factor kinase and protein kinase Cθ in conjunction with anti-CD3. Furthermore, we demonstrated that TRAIL costimulation induced phosphorylation of the upstream TCR-proximal tyrosine kinases, Lck and ZAP70. Ligation of the TRAIL by its soluble receptor, DR4-Fc, alone was able to induce the phosphorylation of Lck and ZAP70 and to activate the NF-κB pathway; however, it was insufficient to fully activate T cells to support T cell proliferation. In contrast, TRAIL engagement in conjunction with anti-CD3, but not TRAIL ligation alone, induced lipid raft assembly and recruitment of Lck and PKCθ. These results demonstrate that TRAIL costimulation mediates NF-κB activation and T cell proliferation by lipid raft assembly and recruitment of Lck. Our results suggest that in TRAIL costimulation, lipid raft recruitment of Lck integrates mitogenic NF-κB-dependent signals from the TCR and TRAIL in T lymphocytes.

Original languageEnglish
Pages (from-to)931-939
Number of pages9
JournalJournal of Immunology
Volume186
Issue number2
DOIs
Publication statusPublished - Jan 15 2011

ASJC Scopus subject areas

  • Immunology

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