Plzf drives MLL-fusion-mediated leukemogenesis specifically in long-term hematopoietic stem cells.

Ryoichi Ono, Masahiro Masuya, Hideaki Nakajima, Yutaka Enomoto, Eri Miyata, Akihide Nakamura, Satomi Ishii, Kei Suzuki, Fumi Shibata-Minoshima, Naoyuki Katayama, Toshio Kitamura, Tetsuya Nosaka

研究成果: Article査読

18 被引用数 (Scopus)


Oncogenic transformation requires unlimited self-renewal. Currently, it remains unclear whether a normal capacity for self-renewal is required for acquiring an aberrant self-renewal capacity. Our results in a new conditional transgenic mouse showed that a mixed lineage leukemia (MLL) fusion oncogene, MLL-ENL, at an endogenous-like expression level led to leukemic transformation selectively in a restricted subpopulation of hematopoietic stem cells (HSCs) through upregulation of promyelocytic leukemia zinc finger (Plzf). Interestingly, forced expression of Plzf itself immortalized HSCs and myeloid progenitors in vitro without upregulation of Hoxa9/Meis1, which are well-known targets of MLL fusion proteins, whereas its mutant lacking the BTB/POZ domain did not. In contrast, depletion of Plzf suppressed the MLL-fusion-induced leukemic transformation of HSCs in vitro and in vivo. Gene expression analyses of human clinical samples showed that a subtype of PLZF-high MLL-rearranged myeloid leukemia cells was closely associated with the gene expression signature of HSCs. These findings suggested that MLL fusion protein enhances the self-renewal potential of normal HSCs to develop leukemia, in part through a Plzf-driven self-renewal program.

出版ステータスPublished - 2013 8月 15

ASJC Scopus subject areas

  • 血液学
  • 生化学
  • 細胞生物学
  • 免疫学


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