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首页> 外文期刊>Cytokine >Identification of cardiac myocytes as the target of interleukin 11, a cardioprotective cytokine.
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Identification of cardiac myocytes as the target of interleukin 11, a cardioprotective cytokine.

机译:鉴定心肌细胞作为白细胞介素11(一种心脏保护性细胞因子)的靶标。

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摘要

Interleukin (IL)-6 family cytokines, which share glycoprotein 130 (gp130) as a signal-transducing receptor component, play important roles in the maintenance of cardiac homeostasis. IL-11, a member of IL-6 family cytokines, is expressed in cardiac myocytes, though it remains to be elucidated how IL-11 functions in the hearts. In the present study, first, we showed that IL-11 administration reduced the ischemia/reperfusion injury in the hearts. IL-11 receptor alpha was expressed in cardiomyocytes. IL-11 treatment rapidly activated signal transducer and activator of transcription 3 (STAT3) and extracellular signal-regulated kinase (ERK) 1/2 in cardiac myocytes. IL-11 stimulation resulted in the translocation of phosphorylated STAT3 into nuclei. Immunofluorescence microscopic analyses revealed that IL-11 treatment led to the cell elongation, as is the case with other cardiotrophic members of IL-6 family, such as leukemia inhibitory factor. Finally we showed that IL-11 treatment conferred the resistance tocell death induced by hydrogen peroxide, which was abrogated by adenoviral transfer of dominant negative STAT3, but not by the inhibition of ERK1/2 with U0126. These findings indicate that IL-11 mediates cytoprotective signals in cardiomyocytes, proposing that IL-11 has the potential to exhibit cardioprotection as a novel biological function.
机译:白介素(IL)-6家族细胞因子与糖蛋白130(gp130)共享作为信号转导受体成分,在维持心脏稳态方面起着重要作用。 IL-11是IL-6家族细胞因子的成员,在心肌细胞中表达,尽管有待阐明IL-11在心脏中的功能还有待阐明。在本研究中,首先,我们证明了IL-11的使用可以减少心脏的缺血/再灌注损伤。 IL-11受体α在心肌细胞中表达。 IL-11治疗可快速激活心肌细胞中的信号转导子和转录激活子3(STAT3)和细胞外信号调节激酶(ERK)1/2。 IL-11刺激导致磷酸化的STAT3易位到细胞核中。免疫荧光显微镜分析显示,IL-11治疗导致细胞伸长,IL-6家族的其他心肌营养成员(如白血病抑制因子)也是如此。最终,我们表明IL-11处理赋予了过氧化氢诱导的细胞死亡抵抗力,过氧化氢可通过显性负STAT3的腺病毒转移而不是通过U0126抑制ERK1 / 2来废除细胞。这些发现表明IL-11介导了心肌细胞中的细胞保护信号,表明IL-11具有作为新的生物学功能表现出心脏保护作用的潜力。

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