Translation inhibition and suppression of stress granules formation by cisplatin.

Translation inhibition and suppression of stress granules formation by cisplatin.
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顺铂抑制和抑制应激颗粒形成。

DOI:
10.1016/j.biopha.2021.112382
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发表时间:
2022-01
期刊:
Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie
影响因子:
--
通讯作者:
Ivanov P
Ivanov P
中科院分区:
其他
文献类型:
--
作者:
Pietras P;Aulas A;Fay MM;Leśniczak-Staszak M;Sowiński M;Lyons SM;Szaflarski W;Ivanov P

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基于铂的抗癌药物,如顺铂,通常用于诱导肿瘤细胞死亡。顺铂被认为是由于顺铂-DNA加合物抑制DNA和RNA合成而诱导细胞凋亡。虽然DNA损伤强调顺铂的抗增殖作用的想法在癌症研究中占主导地位,但细胞对顺铂的敏感性程度与DNA铂化程度之间的相关性较差。在这里,我们研究了顺铂对转录后基因调控的可能影响,这可能有助于顺铂介导的细胞毒性。我们发现顺铂抑制应激颗粒(SGs)的形成,促生存RNA颗粒在细胞代谢中具有多种作用。机制上,顺铂抑制细胞翻译以促进多核糖体的分解和核糖体亚基的聚集。由于SG与多聚核糖体处于平衡状态,顺铂诱导的向核糖体聚集的转变抑制了SG的形成。我们的数据揭示了顺铂对RNA代谢的以前未知的影响。
Platinum-based antineoplastic drugs, such as cisplatin, are commonly used to induce tumor cell death. Cisplatin is believed to induce apoptosis as a result of cisplatin-DNA adducts that inhibit DNA and RNA synthesis. Although idea that DNA damage underlines anti-proliferative effects of cisplatin is dominant in cancer research, there is a poor correlation between the degree of the cell sensitivity to cisplatin and the extent of DNA platination. Here, we examined possible effects of cisplatin on post-transcriptional gene regulation that may contribute to cisplatin-mediated cytotoxicity. We show that cisplatin suppresses formation of stress granules (SGs), pro-survival RNA granules with multiple roles in cellular metabolism. Mechanistically, cisplatin inhibits cellular translation to promote disassembly of polysomes and aggregation of ribosomal subunits. As SGs are in equilibrium with polysomes, cisplatin-induced shift towards ribosomal aggregation suppresses SG formation. Our data uncover previously unknown effects of cisplatin on RNA metabolism.
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