Hesperadin is an inhibitor of human Aurora B, which can prevent the phosphorylation of substrate with IC(50) of 40 nM. Growth of cultured bloodstream forms was also sensitive to Hesperadin (IC(50) of 50 nM). Hesperadin blocked nuclear division and cytokinesis but not other aspects of the cell cycle. Consequently, growth arrested cells accumulated multiple kinetoplasts, flagella and nucleoli, similar to the effects of RNAi-dependent knockdown of TbAUK1 in cultured bloodstream forms cells. Molecular models predicted high-affinity binding of Hesperadin to both conserved and novel sites in TbAUK1. Collectively, these data demonstrate that cell cycle progression is essential for infections with T. brucei and that parasite Aurora kinases can be targeted with small-molecule inhibitors.
CAS Number: 422513-13-1
Molecular Weight: 516.65
Chemical Name: (Z)-N-(2-oxo-3-(phenyl((4-(piperidin-1-ylmethyl)phenyl)amino)methylene)indolin-5-yl)ethanesulfonamide
Appearance: Solid Power
Purity: ≥98% (or refer to the Certificate of Analysis)
Solubility: DMSO: 55.3 mg/mL (100 mM)
Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis
Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.
Shelf Life: ≥360 days if stored properly.
Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.
Drug Formulation: To be determined
HS Tariff Code: 382200
How to use
In HeLa cells, Hesperadin causing defects in mitosis and cytoplasmic division, leading to cell proliferation and polyploidization stopped, because of Aurora B function inhibition during chromosome connection. Addition of 20-100 nM Hesperadin leading to loss of phosphorylation of the mitogenic histone H3 at the Ser10 site. When Hesperadin concentration was 1 μM, other kinases (AMPK, Lck, MKK1, MAPKAP-K1, CHK1, and PHK) activity were significantly reduced.In an in vitro kinase assay, Hesperadin (IC50 = 40 nM) blocked recombinant trypton histone H3 phosphorylation by T. brucei Aurora kinase-1 (TbAUK1) from the pathogenic Trypanosoma brucei. Hesperadin (IC50 = 48 nM) significantly inhibited the growth of cultured infectious blood form (BF) cells, while Hesperadin (IC50 = 550 nM) and weakly inhibited the growth of insect circulation stage (PF) cells
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