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首页> 外文期刊>Cancer Cell >Cancer Exosomes Perform Cell-Independent MicroRNA Biogenesis and Promote Tumorigenesis
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Cancer Exosomes Perform Cell-Independent MicroRNA Biogenesis and Promote Tumorigenesis

机译:癌症外泌体执行细胞非依赖性MicroRNA生物发生并促进肿瘤发生。

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摘要

Exosomes are secreted by all cell types and contain proteins and nucleic acids. Here, we report that breast cancer associated exosomes contain microRNAs (miRNAs) associated with the RISC-Loading Complex (RLC) and display cell-independent capacity to process precursor microRNAs (pre-miRNAs) into mature miRNAs. Pre-miRNAs, along with Dicer, AGO2, and TRBP, are present in exosomes of cancer cells. CD43 mediates the accumulation of Dicer specifically in cancer exosomes. Cancer exosomes mediate an efficient and rapid silencing of mRNAs to reprogram the target cell transcriptome. Exosomes derived from cells and sera of patients with breast cancer instigate nontumorigenic epithelial cells to form tumors in a Dicer-dependent manner. These findings offer opportunities for the development of exosomes based biomarkers and therapies.
机译:外泌体由所有细胞类型分泌,并包含蛋白质和核酸。在这里,我们报告乳腺癌相关的外泌体包含与RISC加载复合体(RLC)相关的microRNA(miRNA),并显示出将细胞前体microRNA(pre-miRNA)加工成成熟miRNA的非细胞依赖性能力。 Pre-miRNA与Dicer,AGO2和TRBP一起存在于癌细胞的外泌体中。 CD43专门介导Dicer在癌症外泌体中的积累。癌症外泌体介导有效且快速的mRNA沉默,以重新编程靶细胞转录组。来自乳腺癌患者细胞和血清的外泌体以切丁酶依赖性方式刺激非致瘤性上皮细胞形成肿瘤。这些发现为基于外泌体的生物标志物和疗法的开发提供了机会。

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