Inhibition of AKT survival pathway by a small molecule inhibitor in human endometrial cancer cells.

Inhibition of AKT survival pathway by a small molecule inhibitor in human endometrial cancer cells.
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人子宫内膜癌细胞中小分子抑制剂对AKT存活途径的抑制。

DOI:
10.1038/sj.bjc.6602214
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发表时间:
2004-11-15
影响因子:
8.8
通讯作者:
Lin, J
Lin, J
中科院分区:
医学1区
文献类型:
--
作者:
Jin, X;Gossett, DR;Wang, S;Yang, D;Cao, Y;Chen, J;Guo, R;Reynolds, RK;Lin, J

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PTEN(10 号染色体上磷酸酶和张力蛋白同源物缺失)肿瘤抑制基因在 40-50% 的人类子宫内膜癌中发生突变。 PTEN 部分通过抑制抗凋亡蛋白 AKT 发挥作用。我们证明,两种携带 PTEN 突变的子宫内膜癌细胞系 Ishikawa 和 RL95-2 具有高水平的磷酸化 AKT 和高 AKT 激酶活性。另外两种表达野生型 PTEN、Hec1A 和 KLE 的子宫内膜癌细胞系几乎没有磷酸化 AKT,且可证明的 AKT 激酶活性极低。我们在这四种细胞系中测试了 AKT 途径的潜在抑制剂 API-59CJ-OMe。我们发现 API-59CJ-OMe 在具有高 AKT 活性的 Ishikawa 和 RL95-2 细胞系中抑制 AKT 激酶活性并诱导细胞凋亡,但对没有 AKT 活性的 Hec1A 和 KLE 细胞几乎没有影响。因此,API-59CJ-OMe 可能对那些含有 PTEN 突变和 AKT 激活的子宫内膜癌具有治疗潜力。
The PTEN (phosphatase and tensin homolog deleted on chromosome 10) tumour suppressor is mutated in 40–50% of human endometrial cancers. PTEN exerts its effects in part via inhibition of the antiapoptotic protein AKT. We demonstrate that two endometrial cancer cell lines that harbour PTEN mutations, Ishikawa and RL95-2, have high levels of phosphorylated AKT and high AKT kinase activity. Two additional endometrial cancer cell lines that express wild-type PTEN, Hec1A and KLE, have little phosphorylated AKT and minimal demonstrable AKT kinase activity. We tested a potential inhibitor of the AKT pathway, API-59CJ-OMe, in these four cell lines. We found that API-59CJ-OMe inhibits AKT kinase activity and induces apoptosis in the Ishikawa and RL95-2 cell lines with high AKT activity, but has little effect on Hec1A and KLE cells without AKT activity. API-59CJ-OMe may therefore have therapeutic potential for those endometrial cancers that harbour PTEN mutations and AKT activation.
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