Protein kinase D is an essential regulator of C. elegans innate immunity.
Protein kinase D is an essential regulator of C. elegans innate immunity.
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DOI:
10.1016/j.immuni.2009.03.007
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发表时间:
2009-04-17
期刊:
影响因子:
32.4
通讯作者:
Rubin, Charles S.
中科院分区:
文献类型:
--
作者:
Ren, Min;Feng, Hui;Fu, Ya;Land, Marianne;Rubin, Charles S.
Protein Kinase D (PKD) mediates signal transduction downstream from phospholipase C and diacylglycerol (DAG). PKDs are activated by hormones and stresses in cell lines, but little is known about PKD functions, regulators and effectors in vivo. Here, we show that DKF-2, a C. elegans PKD, regulates innate immunity. Animals lacking DKF-2 are hypersensitive to killing by bacteria that are C. elegans and human pathogens. DKF-2 induces >75 mRNAs, which encode anti-microbial peptides and proteins that sustain intestinal epithelium. Induction of immune effector mRNAs by DKF-2 proceeds via PMK-1 (p38 Map-kinase)-dependent and independent pathways. TPA-1, a PKCδ homolog, regulates activation and functions of DKF-2 in vivo. DKF-2 provides a novel molecular link that couples DAG signaling to regulation of immunity. A newly-discovered intersection between DAG/TPA-1/DKF-2 and PMK-1 pathways enables integrated immune responses to multiple stimuli.
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