PMID- 36400430 OWN - NLM STAT- MEDLINE DCOM- 20230213 LR - 20230303 IS - 1878-0261 (Electronic) IS - 1574-7891 (Print) IS - 1574-7891 (Linking) VI - 17 IP - 2 DP - 2023 Feb TI - SMG1, a nonsense-mediated mRNA decay (NMD) regulator, as a candidate therapeutic target in multiple myeloma. PG - 284-297 LID - 10.1002/1878-0261.13343 [doi] AB - Early data suggested that CC-115, a clinical molecule, already known to inhibit the mammalian target of rapamycin kinase (TORK) and DNA-dependent protein kinase (DNA-PK) may have additional targets beyond TORK and DNA-PK. Therefore, we aimed to identify such target(s) and investigate a potential therapeutic applicability. Functional profiling of 141 cancer cell lines revealed inhibition of kinase suppressor of morphogenesis in genitalia 1 (SMG1), a key regulator of the RNA degradation mechanism nonsense-mediated mRNA decay (NMD), as an additional target of CC-115. CC-115 treatment showed a dose-dependent increase of SMG1-mediated NMD transcripts. A subset of cell lines, including multiple myeloma (MM) cell lines sensitive to the endoplasmic reticulum stress-inducing compound thapsigargin, were highly susceptible to SMG1 inhibition. CC-115 caused the induction of UPR transcripts and cell death by mitochondrial apoptosis, requiring the presence of BAX/BAK and caspase activity. Superior antitumor activity of CC-115 over TORK inhibitors in primary human MM cells and three xenograft mouse models appeared to be via inhibition of SMG1. Our data support further development of SMG1 inhibitors as possible therapeutics in MM. CI - (c) 2022 The Authors. Molecular Oncology published by John Wiley & Sons Ltd on behalf of Federation of European Biochemical Societies. FAU - Leeksma, Alexander C AU - Leeksma AC AUID- ORCID: 0000-0002-5576-7415 AD - Department of Hematology, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. AD - Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. AD - Lymphoma and myeloma center Amsterdam (LYMMCARE), Cancer Center Amsterdam (CCA) and Amsterdam Infection and Immunity Institute (AIII), The Netherlands. FAU - Derks, Ingrid A M AU - Derks IAM AD - Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. AD - Lymphoma and myeloma center Amsterdam (LYMMCARE), Cancer Center Amsterdam (CCA) and Amsterdam Infection and Immunity Institute (AIII), The Netherlands. FAU - Garrick, Brett AU - Garrick B AD - Translational Research, Bristol Myers Squibb, San Francisco, CA, USA. FAU - Jongejan, Aldo AU - Jongejan A AD - Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. FAU - Colombo, Martino AU - Colombo M AD - Bristol Myers Squibb's Center for Innovation and Translational Research Europe (CITRE), Seville, Spain. FAU - Bloedjes, Timon AU - Bloedjes T AD - Department of Pathology, Amsterdam University Medical Centers, Lymphoma and Myeloma Center Amsterdam (LYMMCARE), University of Amsterdam, The Netherlands. FAU - Trowe, Torsten AU - Trowe T AD - Translational Research, Bristol Myers Squibb, San Francisco, CA, USA. FAU - Leisten, Jim C AU - Leisten JC AD - Discovery, Bristol Myers Squibb, San Diego, CA, USA. FAU - Howarth, Michelle AU - Howarth M AD - Translational Research, Bristol Myers Squibb, San Francisco, CA, USA. FAU - Malek, Mehnaz AU - Malek M AD - Translational Research, Bristol Myers Squibb, San Francisco, CA, USA. FAU - Mortensen, Deborah S AU - Mortensen DS AUID- ORCID: 0000-0002-9144-0962 AD - Discovery, Bristol Myers Squibb, San Diego, CA, USA. FAU - Blease, Kate AU - Blease K AD - Discovery, Bristol Myers Squibb, San Diego, CA, USA. FAU - Groza, Mathew C AU - Groza MC AD - Discovery, Bristol Myers Squibb, San Diego, CA, USA. FAU - Narla, Rama Krishna AU - Narla RK AD - Discovery, Bristol Myers Squibb, San Diego, CA, USA. FAU - Loos, Remco AU - Loos R AD - Bristol Myers Squibb's Center for Innovation and Translational Research Europe (CITRE), Seville, Spain. FAU - Kersten, Marie-Jose AU - Kersten MJ AD - Department of Hematology, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. FAU - Moerland, Perry D AU - Moerland PD AD - Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. FAU - Guikema, Jeroen E J AU - Guikema JEJ AUID- ORCID: 0000-0001-6894-3441 AD - Department of Pathology, Amsterdam University Medical Centers, Lymphoma and Myeloma Center Amsterdam (LYMMCARE), University of Amsterdam, The Netherlands. FAU - Kater, Arnon P AU - Kater AP AD - Department of Hematology, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. AD - Lymphoma and myeloma center Amsterdam (LYMMCARE), Cancer Center Amsterdam (CCA) and Amsterdam Infection and Immunity Institute (AIII), The Netherlands. FAU - Eldering, Eric AU - Eldering E AD - Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands. AD - Lymphoma and myeloma center Amsterdam (LYMMCARE), Cancer Center Amsterdam (CCA) and Amsterdam Infection and Immunity Institute (AIII), The Netherlands. FAU - Filvaroff, Ellen H AU - Filvaroff EH AD - Translational Research, Bristol Myers Squibb, San Francisco, CA, USA. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20221216 PL - United States TA - Mol Oncol JT - Molecular oncology JID - 101308230 RN - 9007-49-2 (DNA) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.1 (SMG1 protein, human) RN - EC 2.7.11.1 (Smg1 protein, mouse) SB - IM MH - Animals MH - Humans MH - Mice MH - Cell Line MH - DNA/metabolism MH - Mammals/genetics/metabolism MH - *Multiple Myeloma/drug therapy/genetics MH - *Nonsense Mediated mRNA Decay/genetics MH - Protein Kinases/metabolism MH - Protein Serine-Threonine Kinases/genetics/metabolism PMC - PMC9892823 OTO - NOTNLM OT - MM OT - NMD OT - SMG1 OT - UPR OT - cancer OT - therapy COIS- This work was sponsored via a research agreement between Amsterdam University Medical Centers and Bristol Myers Squibb. BG, MH, MM, DM, KB, MC, JCL, MCG, RKN, RL, TT, and EHF were/are employees of Bristol Myers Squibb. The remaining authors declare no conflict of interest. EDAT- 2022/11/19 06:00 MHDA- 2023/02/04 06:00 PMCR- 2022/12/16 CRDT- 2022/11/18 20:23 PHST- 2022/10/16 00:00 [revised] PHST- 2022/08/01 00:00 [received] PHST- 2022/11/17 00:00 [accepted] PHST- 2022/11/19 06:00 [pubmed] PHST- 2023/02/04 06:00 [medline] PHST- 2022/11/18 20:23 [entrez] PHST- 2022/12/16 00:00 [pmc-release] AID - MOL213343 [pii] AID - 10.1002/1878-0261.13343 [doi] PST - ppublish SO - Mol Oncol. 2023 Feb;17(2):284-297. doi: 10.1002/1878-0261.13343. Epub 2022 Dec 16.