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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003295naa a2200433 4500
001oai:prod.swepub.kib.ki.se:147786460
003SwePub
008240916s2021 | |||||||||||000 ||eng|
024a http://kipublications.ki.se/Default.aspx?queryparsed=id:1477864602 URI
024a https://doi.org/10.1038/s41419-021-04191-92 DOI
040 a (SwePub)ki
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
100a Giovannucci, TAu Karolinska Institutet4 aut
2451 0a Inhibition of the ubiquitin-proteasome system by an NQO1-activatable compound
264 c 2021-10-06
264 1b Springer Science and Business Media LLC,c 2021
520 a Malignant cells display an increased sensitivity towards drugs that reduce the function of the ubiquitin-proteasome system (UPS), which is the primary proteolytic system for destruction of aberrant proteins. Here, we report on the discovery of the bioactivatable compound CBK77, which causes an irreversible collapse of the UPS, accompanied by a general accumulation of ubiquitylated proteins and caspase-dependent cell death. CBK77 caused accumulation of ubiquitin-dependent, but not ubiquitin-independent, reporter substrates of the UPS, suggesting a selective effect on ubiquitin-dependent proteolysis. In a genome-wide CRISPR interference screen, we identified the redox enzyme NAD(P)H:quinone oxidoreductase 1 (NQO1) as a critical mediator of CBK77 activity, and further demonstrated its role as the compound bioactivator. Through affinity-based proteomics, we found that CBK77 covalently interacts with ubiquitin. In vitro experiments showed that CBK77-treated ubiquitin conjugates were less susceptible to disassembly by deubiquitylating enzymes. In vivo efficacy of CBK77 was validated by reduced growth of NQO1-proficient human adenocarcinoma cells in nude mice treated with CBK77. This first-in-class NQO1-activatable UPS inhibitor suggests that it may be possible to exploit the intracellular environment in malignant cells for leveraging the impact of compounds that impair the UPS.
650 7a MEDICIN OCH HÄLSOVETENSKAPx Medicinsk bioteknologix Medicinsk bioteknologi0 (SwePub)304012 hsv//swe
650 7a MEDICAL AND HEALTH SCIENCESx Medical Biotechnologyx Medical Biotechnology0 (SwePub)304012 hsv//eng
700a Salomons, FAu Karolinska Institutet4 aut
700a Haraldsson, Mu Karolinska Institutet4 aut
700a Elfman, LHM4 aut
700a Wickstrom, Mu Karolinska Institutet4 aut
700a Young, P4 aut
700a Lundback, T4 aut
700a Eirich, J4 aut
700a Altun, Mu Karolinska Institutet4 aut
700a Jafari, Ru Karolinska Institutet4 aut
700a Gustavsson, ALu Karolinska Institutet4 aut
700a Johnsen, JIu Karolinska Institutet4 aut
700a Dantuma, NPu Karolinska Institutet4 aut
710a Karolinska Institutet4 org
773t Cell death & diseased : Springer Science and Business Media LLCg 12:10, s. 914-q 12:10<914-x 2041-4889
856u https://www.nature.com/articles/s41419-021-04191-9.pdf
8564 8u http://kipublications.ki.se/Default.aspx?queryparsed=id:147786460
8564 8u https://doi.org/10.1038/s41419-021-04191-9

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