Mammalian eIF4E2-GSK3β maintains basal phosphorylation of p53 to resist senescence under hypoxia.
Mammalian eIF4E2-GSK3β maintains basal phosphorylation of p53 to resist senescence under hypoxia.
复制标题
哺乳动物EIF4E2GSK3β维持P53的基础磷酸化,以抵抗缺氧条件下的衰老。
DOI:
10.1038/s41419-022-04897-4
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发表时间:
2022-05-14
影响因子:
9
通讯作者:
Zhang, Min
中科院分区:
文献类型:
--
作者:
Sun, Lei;Yang, He;He, Dong;Chen, Jian;Dong, Zhiqiang;Luo, Shaoxiang;Liang, Huiting;Cao, Yu;Cai, Bingcheng;Zhang, Min
Hypoxia modulates senescence, but their physiological link remains unclear. Here, we found that eIF4E2, a hypoxia-activated translation initiation factor, interacted with GSK3β to maintain phosphorylation of p53, thus resisting senescence under hypoxia. RNA-binding protein RBM38 interacted with eIF4E to inhibit the translation of p53, but GSK3β-mediated Ser195 phosphorylation disrupted the RBM38-eIF4E interaction. Through investigation of RBM38 phosphorylation, we found that the eIF4E2-GSK3β pathway specifically regulated proline-directed serine/threonine phosphorylation (S/T-P). Importantly, peptides e2-I or G3-I that blocking eIF4E2-GSK3β interaction can inhibit the basal S/T-P phosphorylation of p53 at multiple sites, therby inducing senescence through transcriptional inhibition. Additionally, a nanobody was screened via the domain where eIF4E2 bound to GSK3β, and this nanobody inhibited S/T-P phosphorylation to promote senescence. Furthermore, hypoxia inhibited eIF4E2-GSK3β pathway by mediating S-Nitrosylation of GSK3β. Blocking eIF4E2-GSK3β interaction promoted liver senescence under hypoxia, thus leading to liver fibrosis, eventually accelerating N, N-diethylnitrosamine (DEN)-induced tumorigenesis. Interestingly, eIF4E2 isoforms with GSK3β-binding motif exclusively exist in mammals, which protect zebrafish heart against hypoxia. Together, this study reveals a mammalian eIF4E2-GSK3β pathway that prevents senescence by maintaining basal S/T-P phosphorylation of p53, which underlies hypoxia adaptation of tissues.
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DOI:
10.3803/enm.2013.28.4.297
发表时间:
2013-12
期刊:
Endocrinology and metabolism (Seoul, Korea)
影响因子:
--
作者:
Kim YM;Song I;Seo YH;Yoon G
通讯作者:
Yoon G
影响因子:
16
作者:
He L;Gomes AP;Wang X;Yoon SO;Lee G;Nagiec MJ;Cho S;Chavez A;Islam T;Yu Y;Asara JM;Kim BY;Blenis J
通讯作者:
Blenis J
影响因子:
5.3
作者:
Fluegel, Daniela;Goerlach, Agnes;Kietzmann, Thomas
通讯作者:
Kietzmann, Thomas
影响因子:
5.3
作者:
Buschmann, T;Potapova, O;Ronai, Z
通讯作者:
Ronai, Z
影响因子:
37.3
作者:
Eom, Tae-Yeon;Jope, Richard S.
通讯作者:
Jope, Richard S.