Enhanced T cell responses due to diacylglycerol kinase zeta deficiency.
Much is known about how T cell receptor (TCR) engagement leads to T cell activation; however, the mechanisms terminating TCR signaling remain less clear. Diacylglycerol, generated after TCR ligation, is essential in T cells. Its function must be controlled tightly to maintain normal T cell homeostasis. Previous studies have shown that diacylglycerol kinase zeta (DGKzeta), which converts diacylglycerol to phosphatidic acid, can inhibit TCR signaling. Here we show that DGKzeta-deficient T cells are hyperresponsive to TCR stimulation both ex vivo and in vivo. Furthermore, DGKzeta-deficient mice mounted a more robust immune response to lymphocytic choriomeningitis virus infection than did wild-type mice. These results demonstrate the importance of DGKzeta as a physiological negative regulator of TCR signaling and T cell activation.
Duke Scholars
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Related Subject Headings
- T-Lymphocytes
- Signal Transduction
- Receptors, Interleukin-2
- Receptors, Antigen, T-Cell
- Phosphatidic Acids
- Mice, Knockout
- Mice, Inbred C57BL
- Mice
- Lymphocytic Choriomeningitis
- Lymphocyte Activation
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- T-Lymphocytes
- Signal Transduction
- Receptors, Interleukin-2
- Receptors, Antigen, T-Cell
- Phosphatidic Acids
- Mice, Knockout
- Mice, Inbred C57BL
- Mice
- Lymphocytic Choriomeningitis
- Lymphocyte Activation