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首页> 外文期刊>Journal of Leukocyte Biology: An Official Publication of the Reticuloendothelial Society >Protein kinase C theta is expressed in mast cells and is functionally involved in Fcepsilon receptor I signaling.
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Protein kinase C theta is expressed in mast cells and is functionally involved in Fcepsilon receptor I signaling.

机译:蛋白激酶C theta在肥大细胞中表达,并在功能上参与Fcepsilon受体I信号传导。

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摘要

We investigated possible expression and function in mast cells of protein kinase C (PKC) theta, a member of the PKC family with demonstrated function in a limited range of cell types. We found that PKC theta is expressed in bone marrow-derived mast cells and in the RBL-2H3 mast cell line. PKC theta underwent translocation to the membrane in response to Fcepsilon receptor I (FcepsilonR I) activation. Receptor activation induced phosphorylation of PKC theta. The tyrosine phosphorylation of PKC theta is delayed relative to PKC delta and coincides temporally with PKC theta association with c-src family members Lyn and SRC: Studies of RBL-2H3 cells transduced with PKC theta constructs indicated a role for PKC theta in receptor-induced activation of extracellular regulated kinases, interleukin-3 gene transcription, and degranulation in response to antigen stimulation. These studies extend the known functions of PKCtheta to another important immune cell type and indicate the concurrent participation of multiple PKCs in the FcepsilonR I-mediated response of mast cells.
机译:我们研究了可能在蛋白激酶C(PKC)theta的肥大细胞中表达和功能,theta是PKC家族的一员,在有限的细胞类型范围内具有证明的功能。我们发现PKC theta在骨髓来源的肥大细胞和RBL-2H3肥大细胞系中表达。响应Fcepsilon受体I(FcepsilonR I)激活,PKC theta易位至膜。受体活化引起PKCθ的磷酸化。 PKC theta的酪氨酸磷酸化相对于PKC delta有所延迟,并且在时间上与PKC theta与c-src家族成员Lyn和SRC相关:与PKC theta构建体转导的RBL-2H3细胞的研究表明,PKC theta在受体诱导的过程中起作用细胞外调节激酶的激活,白介素3基因转录和对抗原刺激的脱颗粒作用。这些研究将PKCtheta的已知功能扩展到另一种重要的免疫细胞类型,并表明多个PKC同时参与FcepsilonR I介导的肥大细胞反应。

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