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Synergism between inhibitors of Aurora A and KIF11 overcomes KIF15-dependent drug resistance
The mitotic kinesin KIF11 (also called Eg5) plays critical roles in spindle functions. Although a number of small-molecule inhibitors of KIF11 are currently in clinical development, drug-resistance could be developed through compensation by another kinesin called KIF15. Using a newly developed infrared-based cell system, we discovered that the effectiveness of one of the latest generations of KIF11 inhibitor (SB743921) could be enhanced with several inhibitors of Aurora A kinase. Evidence including live-cell imaging and isobologram analysis indicated that targeting KIF11 and Aurora A together promoted monoastral spindle formation and mitotic catastrophe synergistically, supporting a model of parallel pathways of centrosome regulation by Aurora A and KIF11. We also developed a KIF15-dependent SB743921-resistance cell model. Significantly, the drug-resistance could also be overcome with Aurora A inhibitors. These results provide a molecular basis for increasing the effectiveness of Aurora A and KIF11 inhibitors and tackling problems of drug resistance.
Related Products
| Cat.No. | Product Name | Information |
|---|---|---|
| S2770 | MK-5108 | MK-5108 is a highly selective Aurora A inhibitor with IC50 of 0.064 nM in a cell-free assay and is 220- and 190-fold more selective for Aurora A than Aurora B/C, while it inhibits TrkA with less than 100-fold selectivity. MK-5108 (VX-689) induces autophagy. Phase 1. |
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