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Abdel-Wahab, Omar; Adli, Mazhar; LaFave, Lindsay M.; Gao, Jie; Hricik, Todd; Shih, Alan H.; Pandey, Suveg; Patel, Jay P.; Chung, Young Rock; Koche, Richard; Perna, Fabiana; Zhao, Xinyang; Taylor, Jordan E.; Park, Christopher Y.; Carroll, Martin; Melnick, Ari; Nimer, Stephen D.; Jaffe, Jacob D.; Aifantis, Iannis; Bernstein, Bradley E.; Levine, Ross L.
Cancer cell, 08/2012, Letnik: 22, Številka: 2Journal Article
Recurrent somatic ASXL1 mutations occur in patients with myelodysplastic syndrome, myeloproliferative neoplasms, and acute myeloid leukemia, and are associated with adverse outcome. Despite the genetic and clinical data implicating ASXL1 mutations in myeloid malignancies, the mechanisms of transformation by ASXL1 mutations are not understood. Here, we identify that ASXL1 mutations result in loss of polycomb repressive complex 2 (PRC2)-mediated histone H3 lysine 27 (H3K27) tri-methylation. Through integration of microarray data with genome-wide histone modification ChIP-Seq data, we identify targets of ASXL1 repression, including the posterior HOXA cluster that is known to contribute to myeloid transformation. We demonstrate that ASXL1 associates with the PRC2, and that loss of ASXL1 in vivo collaborates with NRASG12D to promote myeloid leukemogenesis. Display omitted ► ASXL1 mutations are loss-of-function mutations ► ASXL1 loss results in a genome-wide reduction in H3K27me3 occupancy ► ASXL1 interacts with the PRC2 complex and is important for PRC2 recruitment ► ASXL1 collaborates with co-occurring oncogenes in vivo to promote leukemogenesis
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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