rhodamine 123

Sdz 280 446 is one of the most active cyclopeptolide of many resistance-modifying agents in restoring rhodamine-123 retention within multidrug-resistant P388 cells.

Robinin是一种来源于Robinia的黄酮苷类化合物，具有抗菌和利尿的特性，其衍生自kaempferol。通过监测Colo 320细胞系（表达MDR1 LRP）对Rhodamine 123的吸收情况，探讨了robinin逆转人类结肠癌细胞多药耐药性的能力，但结果显示其效果有限。在使用液相色谱-串联质谱法检测人类乳腺癌细胞系MCF-7的细胞裂解物时，发现了Robinin (NSC-9222)的存在。

Milbemycin A4 oxime is a derivative of milbemycin A4 and a component of milbemycin oxime , compounds that both have insecticidal and nematocidal activity. Milbemycin A4 oxime (0.05 mg kg) reduces the number of microfilariae of the heartworm D. immitis in naturally infested dogs. It inhibits the growth of clinical isolates of C. glabrata with MIC80 values ranging from 16 to greater than 32 μg ml. Milbemycin A4 oxime (2.5 μg ml) blocks efflux of fluconazole from a clinical isolate of C. glabrata, but not from a strain lacking the efflux pumps CgCDR1 and PDH1, and reduces the MICs of fluconazole and 4-nitroquinoline 1-oxide in wild-type C. glabrata. It enhances adriamycin-induced inhibition of cell growth, as well as increases the intracellular accumulation of adriamycin and the P-glycoprotein substrate rhodamine 123 , in adriamycin-resistant, but not -sensitive, MCF-7 breast cancer cells in a concentration-dependent manner.

C2 Adamantanyl globotriaosylceramide (AdaGb3) is a bioactive sphingolipid and water-soluble form of globotriaosylceramide that contains an adamantanyl group in place of the fatty acyl chain. It inhibits Vero toxin binding to globotriaosylceramide in an ELISA assay when used at a concentration of 10 μM. AdaGb3 decreases cell surface expression of P-glycoprotein (P-gp) and reduces efflux of rhodamine 123 in MDCK cells. It also increases apical-to-basal transport of vinblastine in human intestinal C2BBe1 cells.

化合物C3N-Dbn-Trp2 作为ATP结合盒转运蛋白ABCB1的抑制剂, 在HEK293T及HCT-15细胞中，该化合物阻断了ABCB1介导的Rhodamine 123的外排作用，其IC50值分别为5.9 µM和2.2 µM。此外，C3N-Dbn-Trp2 还能抑制Doxorubicin的外排，从而提高了ABCB1表达细胞对Doxorubicin的细胞毒性响应。