Autophagic sequestration of SQSTM1 disrupts the aggresome formation of ubiquitinated proteins during proteasome inhibition.
Autophagic sequestration of SQSTM1 disrupts the aggresome formation of ubiquitinated proteins during proteasome inhibition.
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DOI:
10.1038/s41419-022-05061-8
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发表时间:
2022-07-15
影响因子:
9
通讯作者:
Bi, Feng
中科院分区:
文献类型:
--
作者:
Zhang, Chenliang;Huang, Chen;Xia, Hongwei;Xu, Huanji;Tang, Qiulin;Bi, Feng
Aggresome formation is a protective cellular response to counteract proteasome dysfunction by sequestering misfolded proteins and reducing proteotoxic stress. Autophagic degradation of the protein aggregates is considered to be a key compensating mechanism for balancing proteostasis. However, the precise role of autophagy in proteasome inhibition-induced aggresome biogenesis remains unclear. Herein, we demonstrate that in the early stage of proteasome inhibition, the maturation of the autophagosome is suppressed, which facilitates aggresome formation of misfolded proteins. Proteasome inhibition-induced phosphorylation of SQSTM1 T269/S272 inhibits its autophagic receptor activity and promotes aggresome formation of misfolded proteins. Inhibiting SQSTM1 T269/S272 phosphorylation using Doramapimod aggravates proteasome inhibitor-mediated cell damage and tumor suppression. Taken together, our data reveal a negative effect of autophagy on aggresome biogenesis and cell damage upon proteasome inhibition. Our study suggests a novel therapeutic intervention for proteasome inhibitor-mediated tumor treatment.
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影响因子:
64.5
作者:
Kawaguchi, Y;Kovacs, JJ;Yao, TP
通讯作者:
Yao, TP
DOI:
10.1083/jcb.143.7.1883
发表时间:
1998-12-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Johnston JA;Ward CL;Kopito RR
通讯作者:
Kopito RR
影响因子:
7.7
作者:
Kaniuk, Natalia A.;Kiraly, Michael;Brumell, John H.
通讯作者:
Brumell, John H.
DOI:
10.1083/jcb.201009067
发表时间:
2011-01-10
期刊:
The Journal of cell biology
影响因子:
--
作者:
Itakura E;Mizushima N
通讯作者:
Mizushima N
DOI:
10.1016/j.bbrc.2018.06.153
发表时间:
2018-09-18
影响因子:
3.1
作者:
Cabe M;Rademacher DJ;Karlsson AB;Cherukuri S;Bakowska JC
通讯作者:
Bakowska JC