GDC-0879是一种新型，有效的，选择性的B-Raf抑制剂，IC50为0.13 nM，对c-Raf也有抑制作用；对其他蛋白激酶没有抑制作用。体外研究，在V600E B-Raf 突变的A375黑色素瘤和V600E B-Raf突变的Colo205结肠癌细胞系中，GDC-0879抑制MEK1磷酸化作用时IC50分别为59和29 nM。GDC-0879有效抑制Malme3M细胞的B-raf V600E 酶促作用，IC50为0.75 μM。用GDC-0879处理，EC50值<0.5的细胞都表达B-raf V600E 致癌等位基因(A375,624,SK-MEL-28,Malme3M, C32, 928, 888, G-361, Colo205, Colo206, SW1417, CL34,及Colo201)。

96%

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

DMSO ：33.4 mg/mL (100 mM)

B-Raf

GDC-0879 also inhibits cellular pERK with IC50 of 63 nM. GDC-0879 shows comparable potency in A375 melanoma and Colo205 colorectal carcinoma cell lines, both of which are B-RafV600E mutant, with IC50 of 59 nM and 29 nM for pMEK1 inhibition respectively. GDC-0879 potently inhibits B-RafV600E in Malme3M cells with IC50 of 0.75 μM. GDC-0879 also shows EC50 values

In GDC-0879 treated mice, both cell line- and patient-derived BRAFV600E tumors exhibit stronger and more sustained pharmacodynamic inhibition (>90% for 8 hours) and improved survival compared to mutant KRAS-expressing tumors. Although there is involvement of activated RAF signaling in RAS-induced tumorigenesis, decreased time to progression is observed for some KRAS-mutant tumors following GDC-0879 administration. Whereas GDC-0879-mediated efficacy is associated strictly with B-RafV600E status, MEK inhibition also attenuates proliferation and tumor growth of cell lines expressing wild-type BRAF (81% KRAS mutant, 38% KRAS wild type). The responsiveness of B-RafV600E melanoma cells to GDC-0879 could be dramatically altered by pharmacologic and genetic modulation of PI3K pathway activity.

Validation and application of a liquid chromatography-tandem mass spectrometric method for the determination of GDC-0879 and its metabolite in dog plasma using solid phase extraction.
Chouet al. J Pharm Biomed Anal. 2012 Nov;70:354-61. PMID:

分子结构图