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Marinaccio, Christian; Suraneni, Praveen; Celik, Hamza; Volk, Andrew; Wen, Qiang Jeremy; Ling, Te; Bulic, Marinka; Lasho, Terra; Koche, Richard P; Famulare, Christopher A; Farnoud, Noushin; Stein, Brady; Schieber, Michael; Gurbuxani, Sandeep; Root, David E; Younger, Scott T; Hoffman, Ronald; Gangat, Naseema; Ntziachristos, Panagiotis; Chandel, Navdeep S; Levine, Ross L; Rampal, Raajit K; Challen, Grant A; Tefferi, Ayalew; Crispino, John D
Cancer discovery, 06/2021, Letnik: 11, Številka: 6Journal Article
The myeloproliferative neoplasms (MPN) frequently progress to blast phase disease, an aggressive form of acute myeloid leukemia. To identify genes that suppress disease progression, we performed a focused CRISPR/Cas9 screen and discovered that depletion of LKB1/ led to enhanced self-renewal of murine MPN cells. Deletion of in a mouse MPN model caused rapid lethality with enhanced fibrosis, osteosclerosis, and an accumulation of immature cells in the bone marrow, as well as enhanced engraftment of primary human MPN cells . LKB1 loss was associated with increased mitochondrial reactive oxygen species and stabilization of HIF1α, and downregulation of LKB1 and increased levels of HIF1α were observed in human blast phase MPN specimens. Of note, we observed strong concordance of pathways that were enriched in murine MPN cells with LKB1 loss with those enriched in blast phase MPN patient specimens, supporting the conclusion that is a tumor suppressor in the MPNs. SIGNIFICANCE: Progression of the myeloproliferative neoplasms to acute myeloid leukemia occurs in a substantial number of cases, but the genetic basis has been unclear. We discovered that loss of LKB1/ leads to stabilization of HIF1a and promotes disease progression. This observation provides a potential therapeutic avenue for targeting progression. .
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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