Cited by 83Multiple Myeloma Research and TreatmentsProtein Degradation and InhibitorsUbiquitin and proteasome pathways

A genome-scale CRISPR-Cas9 screening in myeloma cells identifies regulators of immunomodulatory drug sensitivity

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Liu, Jiye, Song, Tianyu, Zhou, Wenrong, Xing, Lijie, Wang, Su, Ho, Matthew, Peng, Zhengang, Tai, Yu-Tzu +3 more·2019·Leukemia

Abstract

Immunomodulatory drugs (IMiDs) including lenalidomide and pomalidomide bind cereblon (CRBN) and activate the CRL4 CRBN ubiquitin ligase to trigger proteasomal degradation of the essential transcription factors IKZF1 and IKZF3 and multiple myeloma (MM) cytotoxicity. We have shown that CRBN is also targeted for degradation by SCF Fbxo7 ubiquitin ligase. In the current study, we explored the mechanisms underlying sensitivity of MM cells to IMiDs using genome-wide CRISPR-Cas9 screening. We validate that CSN9 signalosome complex, a deactivator of Cullin-RING ubiquitin ligase, inhibits SCF Fbxo7 E3 ligase-mediated CRBN degradation, thereby conferring sensitivity to IMiDs; conversely, loss of function of CSN9 signalosome activates SCF Fbxo7 complex, thereby enhancing degradation of CRBN and conferring IMiD resistance. Finally, we show that pretreatment with either proteasome inhibitors or NEDD8 activating enzyme (NAE) inhibitors can abrogate degradation and maintain levels of CRBN, thereby enhancing sensitivity to IMiDs. These studies therefore demonstrate that CSN9 signalosome complex regulates sensitivity to IMiDs by modulating CRBN expression.

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  • Several functional genomics campaigns have helped map how the repertoire of CRLs and their regulators shape degrader efficacy, outlining putative resistance mechanisms.

    “Several functional genomics campaigns in recent years have helped map how the repertoire of CLRs and their regulators shape degrader efficacy, thus also outlining putative resistance mechanisms.141-151”

    From Chasing molecular glue degraders: screening approaches (2022) · cites this paper as [144]

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Authors
Liu, J., Song, T., Zhou, W., Xing, L., Wang, S., Ho, M., Peng, Z., Tai, Y.-T., Hideshima, T., Anderson, K. C., & Cang, Y.
Affiliations
  • Harvard University (US)
  • ShanghaiTech University (CN)
  • WuXi AppTec (China) (CN)
Corresponding author
  • Anderson, Kenneth C.
  • Cang, Yong
Venue
Leukemia
Published
2018-07-19
Volume
33
Issue
1
Pages
171-180
ISSN
  • 0887-6924 (ISSN-L)
  • 1476-5551
OpenAlex
W2883654450
Cited by
83
References
50
Citations by year
2026: 5 · 2025: 4 · 2024: 10 · 2023: 10 · 2022: 20 · 2021: 14 · 2020: 12 · 2019: 8
FWCI
6.09
Type
journal article
Language
en
Open access
Locations
  • Leukemia (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5p01ca078378-15, 5r01ca178264-05)
  • National Cancer Institute (R01-CA178264, P01-CA078378, P50CA100707, R01CA050947, R01CA207237, P01CA155258)
Topics
  • Health Sciences › Medicine › Hematology › Multiple Myeloma Research and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
multiple myeloma, immunomodulators, lenalidomide, pomalidomide, cereblon, drug sensitivity, drug resistance, proteasome inhibitors, NEDD8-activating enzyme inhibitor, IKZF1, IKZF3
MeSH terms
Bortezomib, COP9 Signalosome Complex, Antineoplastic Agents, Cyclopentanes, Enzyme Inhibitors, Humans, Immunologic Factors, Multiple Myeloma, Peptide Hydrolases, Prognosis, Pyrimidines, Tumor Cells, Cultured, Biomarkers, Tumor, Gene Expression Regulation, Neoplastic, Ubiquitin-Protein Ligases, Adaptor Proteins, Signal Transducing, Ikaros Transcription Factor, Ubiquitination, Proteolysis, CRISPR-Cas Systems

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