Ribosome changes reprogram translation for chemosurvival in G0 leukemic cells.
Ribosome changes reprogram translation for chemosurvival in G0 leukemic cells.
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核糖体改变重编程翻译对G0白血病细胞化疗存活的影响。
DOI:
10.1126/sciadv.abo1304
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发表时间:
2022-10-28
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Quiescent leukemic cells survive chemotherapy, with translation changes. Our data reveal that FXR1, a protein amplified in several aggressive cancers, is elevated in quiescent and chemo-treated leukemic cells and promotes chemosurvival. This suggests undiscovered roles for this RNA- and ribosome-associated protein in chemosurvival. We find that FXR1 depletion reduces translation, with altered rRNAs, snoRNAs, and ribosomal proteins (RPs). FXR1 regulates factors that promote transcription and processing of ribosomal genes and snoRNAs. Ribosome changes in FXR1-overexpressing cells, including RPLP0/uL10 levels, activate eIF2α kinases. Accordingly, phospho-eIF2α increases, enabling selective translation of survival and immune regulators in FXR1-overexpressing cells. Overriding these genes or phospho-eIF2α with inhibitors reduces chemosurvival. Thus, elevated FXR1 in quiescent or chemo-treated leukemic cells alters ribosomes that trigger stress signals to redirect translation for chemosurvival. Modification of ribosomal properties in therapy-treated AML drives production of survival proteins and thereby AML survival.
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