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Gene expression analysis of Kasumi9 cells cultured with or without BCAA

ABSTRACT: The branched-chain amino acid (BCAA) metabolism plays pleiotropic roles in homeostasis. Here we show that human acute leukemia-initiating cells (LICs), but not normal hematopoietic stem cells, are heavily addicted to the BCAA metabolism, irrespective of myeloid or lymphoid types. To clarify how BCAA metabolism affect the gene expression of human acute leukemia cells, we examined the gene expression alteration in human acute leukemia cell lines in control and BCAA-resrticted culture conditions.

ORGANISM(S): Homo sapiens

PROVIDER: GSE131814 | GEO | 2019/07/01

REPOSITORIES: GEO

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Project description:The branched-chain amino acid (BCAA) metabolism plays pleiotropic roles in homeostasis. Here we show that human acute leukemia-initiating cells (LICs), but not normal hematopoietic stem cells, are heavily addicted to the BCAA metabolism, irrespective of myeloid or lymphoid types. Human acute leukemia cells had a high level of BCAAs, transporting free BCAAs into the cytoplasm. Functional inhibition of BCAA transaminase-1 (BCAT1), a catalytic enzyme for BCAAs, induced apoptosis of human LICs, and suppressed reconstitution of human leukemia in xenograft models. Furthermore, deprivation of BCAAs from daily diet in mice transplanted with human LICs strongly inhibited their expansion and self-renewal in vivo. The BCAT1 inhibition inactivates the PRC2 function for epigenetic maintenance of stem cell signatures via downregulation of EZH2 and EED, critical PRC2 components, and inhibited the mTORC1 signaling for leukemia propagation. Thus, targeting the BCAA metabolism should be a powerful approach to erase cancer stemness in human acute leukemias.

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Gene expression alteration regulated by BCAA-metabolism in human acute leukemia

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