The leukemogenicity of AML1-ETO is dependent on site-specific lysine acetylation.

The leukemogenicity of AML1-ETO is dependent on site-specific lysine acetylation.
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DOI:
10.1126/science.1201662
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发表时间:
2011-08-05
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Nimer SD
Nimer SD
中科院分区:
其他
文献类型:
--
作者:
Wang L;Gural A;Sun XJ;Zhao X;Perna F;Huang G;Hatlen MA;Vu L;Liu F;Xu H;Asai T;Xu H;Deblasio T;Menendez S;Voza F;Jiang Y;Cole PA;Zhang J;Melnick A;Roeder RG;Nimer SD

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在急性髓细胞白血病(AML)中发现的染色体易位产生具有异常转录调节特性的致癌融合转录因子。虽然大多数白血病融合蛋白的治疗靶向仍然难以捉摸,但控制其功能的翻译后修饰可能是可靶向的。我们发现,AML 1-ETO,由t(8;21)易位产生的融合蛋白,在从t(8;21)AML患者分离的白血病细胞中被转录共激活因子p300乙酰化,并且这种乙酰化对于其在人脐带血CD 34+细胞中的自我更新促进作用和在小鼠模型中的致白血病性是必不可少的。抑制p300可消除AML 1-ETO的乙酰化,并削弱其促进白血病转化的能力。因此,赖氨酸乙酰转移酶代表了AML的潜在治疗靶点。
The chromosomal translocations found in acute myelogenous leukemia (AML) generate oncogenic fusion transcription factors with aberrant transcriptional regulatory properties. Although therapeutic targeting of most leukemia fusion proteins remains elusive, the posttranslational modifications that control their function could be targetable. We found that AML1-ETO, the fusion protein generated by the t(8;21) translocation, is acetylated by the transcriptional coactivator p300 in leukemia cells isolated from t(8;21) AML patients, and that this acetylation is essential for its self-renewal–promoting effects in human cord blood CD34+ cells and its leukemogenicity in mouse models. Inhibition of p300 abrogates the acetylation of AML1-ETO and impairs its ability to promote leukemic transformation. Thus, lysine acetyltransferases represent a potential therapeutic target in AML.
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