Differential regulation of primary and memory CD8 T cell immune responses by diacylglycerol kinases.

Journal Article (Journal Article)

The manipulation of signals downstream of the TCR can have profound consequences for T cell development, function, and homeostasis. Diacylglycerol (DAG) produced after TCR stimulation functions as a secondary messenger and mediates the signaling to Ras-MEK-Erk and NF-κB pathways in T cells. DAG kinases (DGKs) convert DAG into phosphatidic acid, resulting in termination of DAG signaling. In this study, we demonstrate that DAG metabolism by DGKs can serve a crucial function in viral clearance upon lymphocytic choriomeningitis virus infection. Ag-specific CD8(+) T cells from DGKα(-/-) and DGKζ(-/-) mice show enhanced expansion and increased cytokine production after lymphocytic choriomeningitis virus infection, yet DGK-deficient memory CD8(+) T cells exhibit impaired expansion after rechallenge. Thus, DGK activity plays opposing roles in the expansion of CD8(+) T cells during the primary and memory phases of the immune response, whereas consistently inhibiting antiviral cytokine production.

Full Text

Duke Authors

Cited Authors

  • Shin, J; O'Brien, TF; Grayson, JM; Zhong, X-P

Published Date

  • March 1, 2012

Published In

Volume / Issue

  • 188 / 5

Start / End Page

  • 2111 - 2117

PubMed ID

  • 22271650

Pubmed Central ID

  • PMC3288785

Electronic International Standard Serial Number (EISSN)

  • 1550-6606

Digital Object Identifier (DOI)

  • 10.4049/jimmunol.1102265


  • eng

Conference Location

  • United States