Multidrug resistance (MDR) is a major problem in cancer chemotherapy. Fumitremorgin C is extremely effective in reversing resistance to mitoxantrone, doxorubicin, and topotecan in multidrug-selected cell lines. In MCF-7/mtxR (a mitoxantroneselected cell line), fumitremorgin C reverses mitoxantrone resistance (114-fold) and doxorubicin resistance (3-fold). Fumitremorgin C (5/AM)significantly potentiates the toxicity of mitoxantrone (93-fold), doxorubicin (26-fold), and topotecan (24-fold) in S1M1-3.2 cells. Reversal of resistance is associated with an increase in drug accumulation. Fumitremorgin C does not reverse drug resistance in cells with elevated expression of Pgp or MRP. Fumitremorgin C almost completely reverses resistance mediated by BCRP in vitro and is a pharmacological probe for the expression and molecular action of this transporter. Fumitremorgin C also enhances the toxicity of mitoxantrone and topotecan in vector-transfected MCF-7 cells (2.5–5.6 fold). It reduces the IC 50 of topotecan in BCRP-overexpressing cells below that observed in the untreated vector-transfected cells. .
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 8-(2'-hydroxy-2'-methylpropyl)-7,8,14,14a-tetrahydro-pyrrolidino-<1,2-c>-piperazino-<1',6'-2,3>-β-carboline-(5aHα, 8Hα, 14aHα)-1,6-dione | 119066-72-7 | C22H27N3O4 | 397.474 |
| —— | 2,2-dimethyl-5-(ethoxycarbonyl)-9-methoxy-4,5,6,11b-tetrahydro-isoxazolidin<2,3-a>-β-carboline | 118974-05-3 | C19H24N2O4 | 344.411 |
| —— | 2-oxo-3-(ethoxycarbonyl)-7-methoxy-3,4-dihydro-β-carboline | 106544-18-7 | C15H16N2O4 | 288.303 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 12β-fumitremorgin C | 119066-64-7 | C22H25N3O3 | 379.459 |