日本語フィールド
著者：*Asumi Yokota, Hideyo Hirai, Ryuichi Sato, Hiroko Adachi, Fumiko Sato, Yoshihiro Hayashi , Atsushi Sato, Naoka Kamio, Yasuo Miura, Masakazu Nakano, Daniel G Tenen, Shinya Kimura, Kei Tashiro, Taira Maekawa題名：C/EBPβ is a critical mediator of IFN-α-induced exhaustion of chronic myeloid leukemia stem cells発表情報：Blood Adv 巻: 3 号: 3 ページ: 476-488キーワード：概要：Even in the era of ABL tyrosine kinase inhibitors, eradication of chronic myeloid leukemia (CML) stem cells is necessary for complete cure of the disease. Interferon-α (IFN-α) has long been used for the treatment of chronic-phase CML, but its mechanisms of action against CML stem cells remain unclear. We found that IFN-α upregulated CCAAT/enhancer binding protein β (C/EBPβ) in BCR-ABL-expressing mouse cells by activating STAT1 and STAT5, which were recruited to a newly identified 3' distal enhancer of Cebpb that contains tandemly aligned IFN-γ-activated site elements. Suppression or deletion of the IFN-γ-activated site elements abrogated IFN-α-dependent upregulation of C/EBPβ. IFN-α induced differentiation and exhaustion of CML stem cells, both in vitro and in vivo, in a C/EBPβ-dependent manner. In addition, IFN-α upregulated C/EBPβ and induced exhaustion of lineage- CD34+ cells from CML patients. Collectively, these results clearly indicate that C/EBPβ is a critical mediator of IFN-α-induced differentiation and exhaustion of CML stem cells.抄録：英語フィールド
Author：*Asumi Yokota, Hideyo Hirai, Ryuichi Sato, Hiroko Adachi, Fumiko Sato, Yoshihiro Hayashi , Atsushi Sato, Naoka Kamio, Yasuo Miura, Masakazu Nakano, Daniel G Tenen, Shinya Kimura, Kei Tashiro, Taira MaekawaTitle：C/EBPβ is a critical mediator of IFN-α-induced exhaustion of chronic myeloid leukemia stem cellsAnnouncement information:Blood Adv Vol: 3 Issue: 3 Page: 476-488An abstract：Even in the era of ABL tyrosine kinase inhibitors, eradication of chronic myeloid leukemia (CML) stem cells is necessary for complete cure of the disease. Interferon-α (IFN-α) has long been used for the treatment of chronic-phase CML, but its mechanisms of action against CML stem cells remain unclear. We found that IFN-α upregulated CCAAT/enhancer binding protein β (C/EBPβ) in BCR-ABL-expressing mouse cells by activating STAT1 and STAT5, which were recruited to a newly identified 3' distal enhancer of Cebpb that contains tandemly aligned IFN-γ-activated site elements. Suppression or deletion of the IFN-γ-activated site elements abrogated IFN-α-dependent upregulation of C/EBPβ. IFN-α induced differentiation and exhaustion of CML stem cells, both in vitro and in vivo, in a C/EBPβ-dependent manner. In addition, IFN-α upregulated C/EBPβ and induced exhaustion of lineage- CD34+ cells from CML patients. Collectively, these results clearly indicate that C/EBPβ is a critical mediator of IFN-α-induced differentiation and exhaustion of CML stem cells.