Abstract:
:A variety of different forms of cellular stress can cause protein misfolding and aggregation and proteotoxicity. The cytoprotective response to proteotoxicity is termed the integrated stress response and involves 4 distinct serine/threonine protein kinases that converge on the translation initiation factor eIF2α, resulting in phosphorylation at S51, cell cycle arrest, and a general inhibition of global protein synthesis. Phosphorylation of eIF2α also promotes translation of ATF4 and the expression of ATF4 target genes that ameliorate proteotoxic stress but can also promote apoptosis. This mini review provides a general overview of these mechanisms and discusses how the inter-tumor heterogeneity that involves them affects sensitivity and resistance to proteasome inhibitors, a new class of cancer therapeutics that promotes tumor cell killing via proteotoxic stress.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
McConkey DJdoi
10.1016/j.bbrc.2016.11.047subject
Has Abstractpub_date
2017-01-15 00:00:00pages
450-453issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(16)31902-7journal_volume
482pub_type
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