» Articles » PMID: 26175417

MYC Is a Major Determinant of Mitotic Cell Fate

Abstract

Taxol and other antimitotic agents are frontline chemotherapy agents but the mechanisms responsible for patient benefit remain unclear. Following a genome-wide siRNA screen, we identified the oncogenic transcription factor Myc as a taxol sensitizer. Using time-lapse imaging to correlate mitotic behavior with cell fate, we show that Myc sensitizes cells to mitotic blockers and agents that accelerate mitotic progression. Myc achieves this by upregulating a cluster of redundant pro-apoptotic BH3-only proteins and suppressing pro-survival Bcl-xL. Gene expression analysis of breast cancers indicates that taxane responses correlate positively with Myc and negatively with Bcl-xL. Accordingly, pharmacological inhibition of Bcl-xL restores apoptosis in Myc-deficient cells. These results open up opportunities for biomarkers and combination therapies that could enhance traditional and second-generation antimitotic agents.

Citing Articles

Age-related genomic alterations and chemotherapy sensitivity in osteosarcoma: insights from cancer genome profiling analyses.

Outani H, Ikegami M, Imura Y, Nakai S, Takami H, Kotani Y Int J Clin Oncol. 2024; 30(2):397-406.

PMID: 39688743 PMC: 11785636. DOI: 10.1007/s10147-024-02673-2.


Intrinsic PARG inhibitor sensitivity is mimicked by haploinsufficiency and rescued by nucleoside supplementation.

Coulson-Gilmer C, Littler S, Barnes B, Brady R, Anagho H, Pillay N NAR Cancer. 2024; 6(3):zcae030.

PMID: 39015544 PMC: 11249981. DOI: 10.1093/narcan/zcae030.


Evaluation of EGFR and COX pathway inhibition in human colon organoids of serrated polyposis and other hereditary cancer syndromes.

Kanth P, Hazel M, Schell J, Rutter J, Yao R, Mills A Fam Cancer. 2024; 23(4):479-489.

PMID: 38609520 PMC: 11512843. DOI: 10.1007/s10689-024-00370-7.


Mitotic gene regulation by the N-MYC-WDR5-PDPK1 nexus.

Streeter S, Williams A, Evans J, Wang J, Guarnaccia A, Florian A BMC Genomics. 2024; 25(1):360.

PMID: 38605297 PMC: 11007937. DOI: 10.1186/s12864-024-10282-6.


Loss-of-function variants affecting the STAGA complex component SUPT7L cause a developmental disorder with generalized lipodystrophy.

Kopp J, Koch L, Lyubenova H, Kuchler O, Holtgrewe M, Ivanov A Hum Genet. 2024; 143(5):683-694.

PMID: 38592547 PMC: 11098864. DOI: 10.1007/s00439-024-02669-y.


References
1.
Gascoigne K, Taylor S . Cancer cells display profound intra- and interline variation following prolonged exposure to antimitotic drugs. Cancer Cell. 2008; 14(2):111-22. DOI: 10.1016/j.ccr.2008.07.002. View

2.
Eilers M, Eisenman R . Myc's broad reach. Genes Dev. 2008; 22(20):2755-66. PMC: 2751281. DOI: 10.1101/gad.1712408. View

3.
Upreti M, Galitovskaya E, Chu R, Tackett A, Terrano D, Granell S . Identification of the major phosphorylation site in Bcl-xL induced by microtubule inhibitors and analysis of its functional significance. J Biol Chem. 2008; 283(51):35517-25. PMC: 2602892. DOI: 10.1074/jbc.M805019200. View

4.
Keen N, Taylor S . Mitotic drivers--inhibitors of the Aurora B Kinase. Cancer Metastasis Rev. 2009; 28(1-2):185-95. DOI: 10.1007/s10555-009-9184-9. View

5.
Den Hollander J, Rimpi S, Doherty J, Rudelius M, Buck A, Hoellein A . Aurora kinases A and B are up-regulated by Myc and are essential for maintenance of the malignant state. Blood. 2010; 116(9):1498-505. PMC: 2938839. DOI: 10.1182/blood-2009-11-251074. View