GW2580是一种选择性CSF-1R抑制剂，作用于c-FMS时，IC₅₀为30 nM，比作用于b-Raf， CDK4， c-KIT， c-SRC， EGFR， ERBB2/4， ERK2， FLT-3， GSK3， ITK， JAK2等的选择性高150到500倍。0.06 μM GW2580在体外完全抑制人类CFMS激酶。GW2580抑制CSF-1刺激的M-NFS-60骨髓瘤细胞，血清刺激的NSO骨髓瘤细胞，CSF-1刺激的新鲜分离的人单核细胞，和VEGF刺激的人脐静脉血管内皮细胞的生长，IC₅₀分别为0.33, 13.5, 0.47 和 12 μM。1 μM GW2580作用于人类破骨细胞，大鼠颅骨，和大鼠胎儿长骨的培养基，完全抑制CSF-1诱导的小鼠M-NFS-60骨髓细胞和人单核细胞的生长，且完全抑制骨退化。

>98%

Store at -20℃ for one year（Powder）；Store at 2-4℃ for two weeks；Store at -20℃ for six months after dissolution.

GW-2580；GW 2580

white to beige powder

DMSO : 17.5 mg/mL (47.76 mM; Need ultrasonic and warming)

c-Fms

GW2580 completely inhibits human cFMS kinase in vitro at 0.06 μM. GW2580 inhibits the growth of CSF-1 stimulated M-NFS-60 myeloid tumor cells, serum stimulated NSO myeloid tumor cells, CSF-1 stimulated freshly isolated human monocytes, and VEGF stimulated human umbilical vein vascular endothelial cells with IC50 of 0.33, 13.5, 0.47 and 12 μM, respectively. 1 μM GW2580 completely inhibits CSF-1-induced growth of mouse M-NFS-60 myeloid cells and human monocytes and completely inhibits bone degradation in cultures of human osteoclasts, rat calvaria, and rat fetal long bone. GW2580 inhibits CSF1R phosphorylation in RAW264.7 murine macrophages stimulated with 10 ng/mL with IC50 of approximately 10 nM. GW2580 also inhibits TRKA activity with IC50 of 0.88 μM.

GW2580 (dosed orally at 40 mg/kg 0.5 h before the CSF-1-priming dose) blocks the ability of exogenous CSF-1 to increase LPS-induced TNF-α production in mice by 63%. When given to mice before CSF-1 priming, GW2580 completely blocks the ability of CSF-1 to prime the mouse for increased IL-6 production. GW2580 (80 mg/kg p.o.) completely inhibits the growth of CSF-1-dependent M-NFS-60 tumor cells in the peritoneal cavity. GW2580 (80 mg/kg) dosed orally twice a day the week before thioglycolate injection and for the 4-day period after thioglycolate injection, diminishes the accumulation of macrophages in the peritoneal cavity after thioglycolate injection (by 45%). In a 21-day adjuvant arthritis model, GW2580 (50 mg/kg) dosed twice a day from days 0 to 21, 7 to 21, or 14 to 21 inhibits joint connective tissue and bone destruction. Gw2580 (160 mg/kg) induces a more than 2-fold reduction of total CD45+ CD11b+ myeloid cells, CD11b+ F4/80+ TAMs, and CD11b+ Gr-1+ MDSCs in implanted 3LL lung tumor, through inhibiting tumor recruitment of myeloid cells from peripheral blood. GW2580 (80 mg/kg) treatment is able to suppress Vegf-a (by 35%) and Mmp9 (by 70%) expression, as well as tumor vascular density (CD31 staining). Combination therapy with GW2580 and an anti-VEGFR-2 antibody results in synergistic tumor growth reduction. DC101 alone reduces tumor growth by 35%, the combination of DC101 and GW2580 results in an apparent synergistic tumor growth reduction of approximately 70%.