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首页> 外文期刊>Cancer Cell >Growth Factor Independence 1 Antagonizes a p53-Induced DNA Damage Response Pathway in Lymphoblastic Leukemia
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Growth Factor Independence 1 Antagonizes a p53-Induced DNA Damage Response Pathway in Lymphoblastic Leukemia

机译:生长因子独立性1拮抗p53诱导的淋巴细胞白血病中DNA损伤反应途径。

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摘要

Most patients with acute lymphoblastic leukemia (ALL) fail current treatments highlighting the need for better therapies. Because oncogenic signaling activates a p53-dependent DNA damage response and apoptosis, leukemic cells must devise appropriate countermeasures. We show here that growth factor independence 1 (Gfi1) can serve such a function because Gfi1 ablation exacerbates p53 responses and lowers the threshold for p53-induced cell death. Specifically, Gfi1 restricts p53 activity and expression of proapoptotic p53 targets such as Bax, Noxa (Pmaip1), and Puma (Bbc3). Subsequently, Gfi1 ablation cures mice from leukemia and limits the expansion of primary human T-ALL xenografts in mice. This suggests that targeting Gfi1 could improve the prognosis of patients with T-ALL or other lymphoid leukemias. ? 2013 Elsevier Inc.
机译:大多数患有急性淋巴细胞白血病(ALL)的患者目前的治疗均告失败,突显了对更好疗法的需求。由于致癌信号激活了p53依赖的DNA损伤反应和凋亡,因此白血病细胞必须制定适当的对策。我们在这里表明,生长因子独立性1(Gfi1)可以起到这样的功能,因为Gfi1消融加剧了p53反应并降低了p53诱导的细胞死亡的阈值。具体而言,Gfi1限制p53活性和促凋亡p53靶标(例如Bax,Noxa(Pmaip1)和Puma(Bbc3))的表达。随后,Gfi1消融治疗小鼠白血病,并限制了原代人T-ALL异种移植物在小鼠中的扩增。这表明靶向Gfi1可以改善T-ALL或其他淋巴白血病患者的预后。 ? 2013爱思唯尔公司

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