Growth factor independence 1 antagonizes a p53-induced DNA damage response pathway in lymphoblastic leukemia.
Growth factor independence 1 antagonizes a p53-induced DNA damage response pathway in lymphoblastic leukemia.
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DOI:
10.1016/j.ccr.2013.01.011
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发表时间:
2013-02-11
期刊:
影响因子:
50.3
通讯作者:
Möröy T
中科院分区:
文献类型:
--
作者:
Khandanpour C;Phelan JD;Vassen L;Schütte J;Chen R;Horman SR;Gaudreau MC;Krongold J;Zhu J;Paul WE;Dührsen U;Göttgens B;Grimes HL;Möröy T
Most patients with acute lymphoblastic leukemia (ALL) fail current treatments highlighting the need for better therapies. Since 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, since Gfi1 ablation exacerbates p53 responses, and lowers the threshold for p53-induced cell death. Specifically, Gfi1 restricts p53 activity and expression of pro-apoptotic 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.
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