Prenatal and postnatal myeloid cells demonstrate stepwise progression in the pathogenesis of MLL fusion gene leukemia.
The steps to leukemia following an in utero fusion of MLL (HRX, ALL-1) to a partner gene in humans are not known. Introduction of the Mll-AF9 fusion gene into embryonic stem cells results in leukemia in mice with cell-type specificity similar to humans. In this study we used myeloid colony assays, immunophenotyping, and transplantation to evaluate myelopoiesis in Mll-AF9 mice. Colony assays demonstrated that both prenatal and postnatal Mll-AF9 tissues have significantly increased numbers of C...Expand abstract
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