The Journal of immunology (1950), 2010-07, Vol.185 (2), p.917-928
2010
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Details
- Autor(en) / Beteiligte
- Titel
- Suppressor of cytokine signaling 2 regulates IL-15-primed human NK cell function via control of phosphorylated Pyk2
- Ist Teil von
- The Journal of immunology (1950), 2010-07, Vol.185 (2), p.917-928
- Ort / Verlag
- United States
- Erscheinungsjahr
- 2010
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- NK cells are capable of killing virus-infected or tumor cells and producing IFN-gamma. Resting NK cells, however, have only minimal cytolytic activity and secrete a low level of IFN-gamma. The cytokine IL-15 can promote the expression of effector functions by resting NK cells. In this study, we demonstrate that suppressor of cytokine signaling 2 (SOCS2) has a novel role in IL-15-primed human NK cell function. SOCS2 expression was upregulated in NK cells following stimulation with IL-15. During IL-15-mediated NK cell priming, SOCS2 interacted with phosphorylated proline-rich tyrosine kinase 2 (Pyk2) at tyrosine 402 (p-Pyk2(Tyr402)) and induced the proteasome-mediated degradation of p-Pyk2(Tyr402) via ubiquitination. Knockdown of SOCS2 resulted in the accumulation of p-Pyk2(Tyr402) and blocked NK cell effector functions. In addition, NK cell cytolytic activity and IFN-gamma production were inhibited by overexpression of the wild-type of Pyk2 but not by the overexpression of tyrosine 402 mutant of Pyk2. These results suggest that SOCS2 regulates human NK cell effector functions via control of phosphorylated Pyk2 depending on IL-15 existence.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0022-1767eISSN: 1550-6606DOI: 10.4049/jimmunol.1000784Titel-ID: cdi_proquest_miscellaneous_733635130
- Format
- –
- Schlagworte
- Blotting, Western, Cell Differentiation - drug effects, Cell Line, Cell Line, Tumor, Cell Survival - drug effects, Cells, Cultured, Cytotoxicity, Immunologic - drug effects, Cytotoxicity, Immunologic - immunology, Focal Adhesion Kinase 2 - genetics, Focal Adhesion Kinase 2 - metabolism, Humans, Infant, Newborn, Interferon-gamma - metabolism, Interleukin-15 - pharmacology, Jurkat Cells, K562 Cells, Killer Cells, Natural - drug effects, Killer Cells, Natural - immunology, Killer Cells, Natural - metabolism, Mutation, Phosphorylation - drug effects, Protein Binding, Receptors, Interleukin-15 - metabolism, Reverse Transcriptase Polymerase Chain Reaction, RNA Interference, Signal Transduction - drug effects, Suppressor of Cytokine Signaling Proteins - genetics, Suppressor of Cytokine Signaling Proteins - metabolism, Tyrosine - metabolism