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首页> 外文期刊>Leukemia Research: A Forum for Studies on Leukemia and Normal Hemopoiesis >Retinoid X receptor alpha is highly phosphorylated in retinoic acid-resistant HL-60R cells and the combination of 9-cis retinoic acid plus MEK inhibitor induces apoptosis in the cells.
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Retinoid X receptor alpha is highly phosphorylated in retinoic acid-resistant HL-60R cells and the combination of 9-cis retinoic acid plus MEK inhibitor induces apoptosis in the cells.

机译:类视黄醇X受体α在抗视黄酸的HL-60R细胞中高度磷酸化,并且9-顺式视黄酸与MEK抑制剂的组合可诱导细胞凋亡。

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摘要

We examined the effects of 9-cis retinoic acid (RA) on the expression levels of retinoid X receptor alpha (RXRalpha) and its phosphorylated form (p-RXRalpha) in HL-60 and HL-60R cells. 9-cis RA reduced both RXRalpha and p-RXRalpha in HL-60 cells, but did neither in HL-60R cells. However, when the HL-60R cells were treated with the combination of 9-cis RA plus PD98059, MEK inhibitor, the p-RXRalpha and RXRalpha proteins all markedly decreased. Moreover, the combination of those agents induced apoptosis in HL-60R cells. Phosphorylation of RXRalpha might be associated with RA-resistance in HL-60R cells.
机译:我们检查了9顺式视黄酸(RA)对HL-60和HL-60R细胞中类维生素A X受体α(RXRalpha)及其磷酸化形式(p-RXRalpha)的表达水平的影响。 9-顺式RA在HL-60细胞中同时降低RXRalpha和p-RXRalpha,但在HL-60R细胞中均没有。但是,当用9-顺式RA加PD98059,MEK抑制剂联合治疗HL-60R细胞时,p-RXRalpha和RXRalpha蛋白均明显降低。而且,这些试剂的组合诱导了HL-60R细胞的凋亡。 RXRalpha的磷酸化可能与HL-60R细胞的RA抗性有关。

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