Olaparib Induces RPL5/RPL11-Dependent p53 Activation via Nucleolar Stress.
Olaparib Induces RPL5/RPL11-Dependent p53 Activation via Nucleolar Stress.
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奥拉帕尼通过核仁应激诱导 RPL5/RPL11 依赖性 p53 激活
DOI:
10.3389/fonc.2022.821366
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发表时间:
2022
影响因子:
4.7
通讯作者:
中科院分区:
文献类型:
--
作者:
The poly (ADP-ribose) polymerase (PARP) inhibitor (PARPi) Olaparib is a widely used targeted therapy for a variety of solid tumors with homologous recombination deficiency (HRD) caused by mutation of BRCA1/2 or other DNA repair genes. The anti-tumor activity of Olaparib has been largely attributed to its ability to inhibit PARP enzymes and block DNA single-strand break (SSB) repair, which eventually leads to the most detrimental DNA damage, double-strand breaks (DSB), in HRD cells. Although PARPi was found to induce p53-dependent cell death, the underlying molecular mechanism remains incompletely understood. Here, we report that Olaparib treatment leads to p53 stabilization and activation of its downstream target genes in a dose- and time-dependent manner. Mechanistically, Olaparib triggers nucleolar stress by inhibiting biosynthesis of the precursor of ribosomal RNAs (pre-rRNA), resulting in enhanced interaction between ribosomal proteins (RPs), RPL5 and RPL11, and MDM2. Consistently, knockdown of RPL5 and RPL11 prevents Olaparib-induced p53 activation. More importantly, Olaparib efficiently suppresses breast and colorectal cancer cell survival and proliferation through activation of p53. Altogether, our study demonstrates that Olaparib activates the nucleolar stress-RPs-p53 pathway, suggesting rRNA biogenesis as a novel target for PARPi.
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影响因子:
50.3
作者:
Macias E;Jin A;Deisenroth C;Bhat K;Mao H;Lindström MS;Zhang Y
通讯作者:
Zhang Y
影响因子:
64.5
作者:
FISHEL, R;LESCOE, MK;KOLODNER, R
通讯作者:
KOLODNER, R
DOI:
10.1073/pnas.2026813118
发表时间:
2021-07-20
影响因子:
11.1
作者:
Chen Y;Hao Q;Wang S;Cao M;Huang Y;Weng X;Wang J;Zhang Z;He X;Lu H;Zhou X
通讯作者:
Zhou X
DOI:
10.1038/nrm.2017.53
发表时间:
2017-10
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
Ray Chaudhuri A;Nussenzweig A
通讯作者:
Nussenzweig A
影响因子:
64.8
作者:
OLINER, JD;KINZLER, KW;VOGELSTEIN, B
通讯作者:
VOGELSTEIN, B