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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2016 ; 7 (ä): ä Nephropedia Template TP
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miR-22 has a potent anti-tumour role with therapeutic potential in acute myeloid leukaemia #MMPMID27116251
Jiang X; Hu C; Arnovitz S; Bugno J; Yu M; Zuo Z; Chen P; Huang H; Ulrich B; Gurbuxani S; Weng H; Strong J; Wang Y; Li Y; Salat J; Li S; Elkahloun AG; Yang Y; Neilly MB; Larson RA; Le Beau MM; Herold T; Bohlander SK; Liu PP; Zhang J; Li Z; He C; Jin J; Hong S; Chen J
Nat Commun 2016[]; 7 (ä): ä PMID27116251show ga
MicroRNAs are subject to precise regulation and have key roles in tumorigenesis. In contrast to the oncogenic role of miR-22 reported in myelodysplastic syndrome (MDS) and breast cancer, here we show that miR-22 is an essential anti-tumour gatekeeper in de novo acute myeloid leukaemia (AML) where it is significantly downregulated. Forced expression of miR-22 significantly suppresses leukaemic cell viability and growth in vitro, and substantially inhibits leukaemia development and maintenance in vivo. Mechanistically, miR-22 targets multiple oncogenes, including CRTC1, FLT3 and MYCBP, and thus represses the CREB and MYC pathways. The downregulation of miR-22 in AML is caused by TET1/GFI1/EZH2/SIN3A-mediated epigenetic repression and/or DNA copy-number loss. Furthermore, nanoparticles carrying miR-22 oligos significantly inhibit leukaemia progression in vivo. Together, our study uncovers a TET1/GFI1/EZH2/SIN3A/miR-22/CREB-MYC signalling circuit and thereby provides insights into epigenetic/genetic mechanisms underlying the pathogenesis of AML, and also highlights the clinical potential of miR-22-based AML therapy.