生物活性 | |||
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描述 | Baccatin III is a precursor to the anti-cancer drug paclitaxel, it's a natural product isolated and purified from the barks of Taxus chinensis. Baccatin III, which is the precursor for the semisynthesis of paclitaxel, exerts anti-tumor immunomodulatory activity in very low doses (0.05-0.5mg/kg). Oral administration of baccatin III significantly reduced the growth of tumors induced by engrafting BALB/c mice with either 4 T1 mammary carcinoma or CT26 colon cancer cells. Baccatin III (0.5mg/kg) did not exert anti-tumor activity in athymic nude mice. Baccatin III decreased the accumulation of MDSCs (Myeloid-derived suppressor cells) in the spleens of the tumor-bearing mice[3]. Baccatin III inhibited cell proliferation of a number of cancer cell lines with IC50 ranging from 2 to 5 μM for fungal baccatin III. It also induced apoptosis in JR4-Jurkat cells with a possible involvement of anti-apoptotic Bcl2 and loss in mitochondrial membrane potential, and was unaffected by inhibitors of caspase-9,-2 or -3 but was prevented in presence of caspase-10 inhibitor. DNA fragmentation was also observed in cells treated with baccatin III[4]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
1.70mL 0.34mL 0.17mL |
8.52mL 1.70mL 0.85mL |
17.05mL 3.41mL 1.70mL |
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