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- W2079011097 abstract "KRAS is often mutated in human hematopoietic malignancies, including juvenile myelomonocytic leukemia (JMML) and T-cell lymphoblastic leukemia/lymphoma (TLL/L). However, the exact role and function of oncogenic KRAS mutations in the initiation and progression of JMML and TLL/L remain elusive. Here, we report the use of a mouse bone marrow transplantation model to study oncogenic Kras-induced leukemogenesis. We show that as the first genetic hit, oncogenic Kras mutations initiate both JMML and TLL/L, but with different efficiencies. Limiting dilution analyses indicated that an oncogenic Kras mutation alone is insufficient to produce frank malignancy. Instead, it cooperates with additional subsequent genetic event(s). Moreover, transplantation of highly purified hematopoietic stem cells (HSCs) and myeloid progenitors identified HSCs as the primary target for the oncogenic Kras mutation. Karyotypic analysis further indicated that secondary genetic hit(s) target lineage-specific progenitors rather than HSCs for terminal tumor transformation into leukemic stem cells. Thus, we propose the cellular mechanism underlying oncogenic Kras-induced leukemogenesis, with HSCs as the primary target by the oncogenic Kras mutations and lineage-committed progenitors as the final target for cancer stem cell transformation. Our model might be also applicable to other solid tumors harboring oncogenic Kras mutations." @default.
- W2079011097 created "2016-06-24" @default.
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- W2079011097 date "2009-02-05" @default.
- W2079011097 modified "2023-10-02" @default.
- W2079011097 title "Oncogenic Kras-induced leukemogeneis: hematopoietic stem cells as the initial target and lineage-specific progenitors as the potential targets for final leukemic transformation" @default.
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- W2079011097 doi "https://doi.org/10.1182/blood-2008-01-134262" @default.
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