Title : MicroRNA-101 is repressed by EZH2 and its restoration inhibits tumorigenic features in embryonal rhabdomyosarcoma.

Pub. Date : 2015

PMID : 26251675






7 Functional Relationships(s)
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1 MiR-101 is a microRNA involved in a negative feedback circuit with EZH2 in different normal and tumor tissues. mir-101 enhancer of zeste 2 polycomb repressive complex 2 subunit Homo sapiens
2 To that, miR-101 can behave as a tumor suppressor in several cancers by repressing EZH2 expression. mir-101 enhancer of zeste 2 polycomb repressive complex 2 subunit Homo sapiens
3 RESULTS: Herein, we report that miR-101 is down-regulated in eRMS patients and in tumor cell lines compared to their controls showing an inverse pattern of expression with EZH2. mir-101 enhancer of zeste 2 polycomb repressive complex 2 subunit Homo sapiens
4 We also show that miR-101 is up-regulated in eRMS cells following both genetic and pharmacological inhibition of EZH2. mir-101 enhancer of zeste 2 polycomb repressive complex 2 subunit Homo sapiens
5 In turn, miR-101 forced expression reduces EZH2 levels as well as restrains the migratory potential of eRMS cells and impairs their clonogenic and anchorage-independent growth capabilities. mir-101 enhancer of zeste 2 polycomb repressive complex 2 subunit Homo sapiens
6 This phenomenon is associated to reduced H3K27me3 levels at the same regulatory locus, indicating that EZH2 directly targets miR-101 for repression in eRMS cells. mir-101 enhancer of zeste 2 polycomb repressive complex 2 subunit Homo sapiens
7 CONCLUSIONS: Altogether, our data show that, in human eRMS, miR-101 is involved in a negative feedback loop with EZH2, whose targeting has been previously shown to halt eRMS tumorigenicity. mir-101 enhancer of zeste 2 polycomb repressive complex 2 subunit Homo sapiens