PHA-848125是一种有效的，ATP竞争性CDK抑制剂，作用于CDK2，IC₅₀为45 nM，作用于CDK2比作用于CDK1，2，4，5和7选择性高3倍以上。PHA-848125有效抑制细胞周期蛋白(cyclin)A/CDK2, IC₅₀为45 nM，PHA-84812为ATP竞争性抑制剂。PHA-848125也抑制cyclin H/CDK7,cyclin D1/CDK4,p35/CDK5,cyclin E/CDK2，及cyclin B/CDK1活性，IC₅₀ 分别为of 0.15, 0.16, 0.265, 0.363, 0.398 μM。PHA-848125作用于大部分对PHA-848125敏感的细胞系时，诱导细胞周期停在G1期，这种抑制存在浓度依赖性。

>98%

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

Milciclib

DMSO : 20 mg/mL (43.42 mM; Need ultrasonic))

CDK2/CyclinA ,TrkA ,CDK7/CyclinH ,CDK4/CyclinD1 ,CDK5/p35

PHA-848125 inhibits, although with lower potency, the activities of cyclin H/CDK7, cyclin D1/CDK4, p35/CDK5, as well as cyclin E/CDK2 and cyclin B/CDK1 with IC50 values of 0.15, 0.16, 0.265, 0.363, 0.398 μM, respectively. Thropomyosin receptor kinase A is also inhibited by PHA-848125 in the same nanomolar range as CDKs. In the most PHA-848125-sensitive cell line, PHA-848125 induces a concentration-dependent G(1) arrest. PHA-848125 also impairs phosphorylation of the retinoblastoma protein at CDK2 and CDK4 specific sites, reduces retinoblastoma protein and cyclin A levels, and increases p21(Cip1), p27(Kip1) and p53 expression. PHA-848125 is added to the cells 48 h after TMZ and cell growth is evaluated after 3 additional days of culture. A drug combination of TMZ, BG and PHA-848125 induces an additive or synergistic effect on cell growth, depending on the cell line. In the JPence of BG, the combination is still more active than the single agents in cell lines moderately sensitive to TMZ, but comparable to PHA-848125 alone in the two TMZ-resistant cell lines. When TMZ plus BG are used in combination with PHA-848125 against cultured normal melanocytes, neither synergistic nor additive antiproliferative effects are observed.

In the preclinical xenograft A2780 human ovarian carcinoma model, PHA-848125 reveals good efficacy and is well tolerated upon repeated daily treatments. Treatment of K-Ras(G12D)LA2 mice with PHA-848125 (40 mg/kg twice daily for 10 days) results in significant tumor growth inhibition at the end of the treatment and is accompanied by a reduction in the cell membrane turnover. On the other hand, following oral administration, PHA-848125 shows significant antitumor activity in various human xenografts, carcinogen-induced tumors and in disseminated primary leukemia models; the plasma concentrations in rodents being in the same range as those found inhibiting cancer cell proliferation.