K145 |
Catalog No.GC12581 |
K145는 IC50이 4.3μM이고 Ki가 6.4μM인 선택적 기질 경쟁적 경구 활성 SphK2 억제제입니다. K145는 SphK1 및 기타 단백질 키나제에 대해 비활성입니다. K145는 세포 사멸을 유도하고 강력한 항종양 활성을 가지고 있습니다.
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Cas No.: 1309444-75-4
Sample solution is provided at 25 µL, 10mM.
K145 is a selective inhibitor of Sphingosine Kinase-2 (SphK2) with IC50 value of 4.3μM [1].
K145 is an analogue of sphingosine. It competes with the substrate of SphK2 and shows Ki value of 6.4μM in the in vitro assay. K145 is selective against SphK2 over SphK1 and CERK. In U937 cells, K145 decreases total cellular S1P and inhibits the phosphorylation of FTY720 (Both S1P and FTY720 are substrates of SphK2). Meanwhile, K145 suppresses cell growth and induces late apoptosis significantly. It is also found to inhibit the phosphorylation of ERK and Akt in this cell line [1].
In the U937 xenograft model in mice, K145 inhibits tumor growth with a TGI value of 44.2% and has less toxicity than tamibarotene. In BALB/c mice bearing the JC xenograft, K145 also shows potent inhibitory effects on tumor growth. Moreover, in BALB/c-nu mice bearing U937 xenograft, oral administration of K145 exerts better antitumor activity than tamibarotene [1].
References:
[1] Liu K, Guo T L, Hait N C, et al. Biological characterization of 3-(2-amino-ethyl)-5-[3-(4-butoxyl-phenyl)-propylidene]-thiazolidine-2, 4-dione (K145) as a selective sphingosine kinase-2 inhibitor and anticancer agent. PloS one, 2013, 8(2): e56471.
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