Inactivation of ribosomal protein S27-like confers radiosensitivity via the Mdm2-p53 and Mdm2-MRN-ATM axes.
Inactivation of ribosomal protein S27-like confers radiosensitivity via the Mdm2-p53 and Mdm2-MRN-ATM axes.
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核糖体蛋白 S27 样的失活通过 Mdm2-p53 和 Mdm2-MRN-ATM 轴赋予放射敏感性
DOI:
10.1038/s41419-017-0192-3
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发表时间:
2018-02-02
影响因子:
9
通讯作者:
Sun Y
中科院分区:
文献类型:
--
作者:
Zhao Y;Tan M;Liu X;Xiong X;Sun Y
RPS27L (ribosomal protein S27-like) is an evolutionarily conserved ribosomal protein and a direct p53 target. We recently reported that Rps27l disruption triggers ribosomal stress to induce p53, causing postnatal death, which can be rescued by Trp53+/−. Whether and how Rps27l modulates radiosensitivity is unknown. Here we report that Rps27l−/−; Trp53+/− mice are extremely sensitive to radiation due to reduced proliferation and massive induction of apoptosis in radiation-sensitive organs. Mechanistically, the radiation sensitivity is mediated by two signaling pathways: (1) activated p53 pathway due to imbalanced Mdm2/Mdm4 levels and reduced E3 ligase activity; and (2) reduced DNA damage response due to reduced MRN/Atm signal as a result of elevated Mdm2 binding of Nbs1 to inhibit Nbs1–Atm binding and subsequent Atm activation. Indeed, heterozygous deletion of Mdm2 restores the MRN/Atm signal. Collectively, our study revealed a physiological condition under which Rps27l regulates the Mdm2/p53 and MRN/Atm axes to maintain DNA damage response and to confer radioprotection in vivo.
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DOI:
10.1158/1078-0432.ccr-15-0479
发表时间:
2015-11-01
期刊:
Clinical cancer research : an official journal of the American Association for Cancer Research
影响因子:
--
作者:
Karnitz LM;Zou L
通讯作者:
Zou L
影响因子:
11.4
作者:
Uziel, T;Lerenthal, Y;Shiloh, Y
通讯作者:
Shiloh, Y
DOI:
10.1073/pnas.1102309108
发表时间:
2011-07-19
影响因子:
11.1
作者:
Huang, Lei;Yan, Zheng;Yuan, Zhi-Min
通讯作者:
Yuan, Zhi-Min
影响因子:
56.9
作者:
Lee, JH;Paull, TT
通讯作者:
Paull, TT
影响因子:
7.2
作者:
Marechal, Alexandre;Zou, Lee
通讯作者:
Zou, Lee