For research use only. Not for therapeutic Use.
SKLB4771 is a potent and selective Flt3 inhibitor with an IC50 value of 10 nM. SKLB4771 downregulates the phosphorylation of FLT3/STAT5/ERK, blocks cell proliferation, and induces apoptosis in tumor tissue[1][2].
SKLB4771 (compound 20c) (72 h) inhibits FLT3-ITD-expressing MV4-11 cells with an IC50 value of 6 nM, and inhibits other cancer cells with IC50s of 3.05 μM (Jurkat), 6.25 μM (Ramos), 3.72 μM (PC-9), 6.94 μM (H292), and 8.91 μM (A431), respectively[1].
SKLB4771 (0-300 nM; 20 h) inhibits FLT3 phosphorylation and also decreases the phosphorylation of the downstream signaling proteins STAT5 and ERK1/2 at concentrations >0.1 μM[1].
SKLB4771 (20-100 mg/kg; i.p.; once daily; 21 d) inhibits tumor growth in vivo without significant weight loss or any other obvious signs of toxicity on mice[1].
Pharmacokinetic Analysis of SKLB4771 in rat (40 mg/kg; i.p.)[1]
Cmax (μg/mL)
T1/2 (h)
AUCmax (h·μg/mL)
Tmax (h)
CLobs (L/h/kg)
5.31
13.9
21.86
1.0
2.21
| Catalog Number | I001424 |
| CAS Number | 1370256-78-2 |
| Synonyms | 1-(4-methylphenyl)-3-[5-[7-(3-morpholin-4-ylpropoxy)quinazolin-4-yl]sulfanyl-1,3,4-thiadiazol-2-yl]urea |
| Molecular Formula | C25H27N7O3S2 |
| Purity | ≥95% |
| InChI | InChI=1S/C25H27N7O3S2/c1-17-3-5-18(6-4-17)28-23(33)29-24-30-31-25(37-24)36-22-20-8-7-19(15-21(20)26-16-27-22)35-12-2-9-32-10-13-34-14-11-32/h3-8,15-16H,2,9-14H2,1H3,(H2,28,29,30,33) |
| InChIKey | LKXFSTAQMOENSC-UHFFFAOYSA-N |
| SMILES | CC1=CC=C(C=C1)NC(=O)NC2=NN=C(S2)SC3=NC=NC4=C3C=CC(=C4)OCCCN5CCOCC5 |
| Reference | [1]. Li WW, et al. Discovery of the novel potent and selective FLT3 inhibitor 1-{5-[7-(3- morpholinopropoxy)quinazolin-4-ylthio]-[1,3,4]thiadiazol-2-yl}-3-p-tolylurea and its anti-acute myeloid leukemia (AML) activities in vitro and in vivo. J Med Chem. 2012 Apr 26;55(8):3852-66. [2]. Yan HX, et al. Accumulation of FLT3(+) CD11c (+) dendritic cells in psoriatic lesions and the anti-psoriatic effect of a selective FLT3 inhibitor. Immunol Res. 2014 Oct;60(1):112-26. |
