| Literature DB >> 10963297 |
M Tagashira1, T Kitagawa, S Isonishi, A Okamoto, K Ochiai, Y Ohtake.
Abstract
The effect of an aureolic acid, mithramycin (MTM) on multidrug resistance (MDR) was investigated. At a concentration of 0.02--0.1 mg/ml (about 20--90 microM), MTM repressed MDR1 gene transcription of SBC-3/ADM, a MDR-phenotype subline derived from human small cell lung tumor. Under the same conditions, another aureolic acid, chromomycin A3, showed potent cytotoxicity. FACS analysis revealed that 5 microm MTM depleted the P-glycoprotein (Pgp) and lowered the efflux activity of SBC-3/ADM cells. Furthermore, MTM sensitized the cells against adriamycin. These results suggest that MTM would be a useful modulator of MDR induced by Pgp.Entities:
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Year: 2000 PMID: 10963297 DOI: 10.1248/bpb.23.926
Source DB: PubMed Journal: Biol Pharm Bull ISSN: 0918-6158 Impact factor: 2.233