Abstract
Objective To investigate the reversal effect of the monomer of traditional Chinese medicine on muhidrug resistance(MDR) and its possible mechanism in K562/ADM cell line in vitro. Methods With different concentrations of baicalin, geniposide administered to K562/ADM cells, the proliferation of K562/ ADM cells was detected by the MTY assay. Expression of mdr-1 mRNA, Topo Ⅱ mRNA was measured by semi-quantitive RT-PCR. Results Thatbaicalin and geniposide could increase the sensitivity of K562/ADM cells to adriamycin, multiples of reversion were 1.95 times and 1.46 times. The proliferation of K562/ADM cells was in-hibited obviously by baicalin and geniposide, the level of mdr-1 mRNA expression was down-regulated and the Topo Ⅱ mRNA was up-regulated(P<0.01 ). Conclusion Baicalin and geniposide may reverse the multi-drag-resistance of K562/ADM cells, which was related to the down-regulation of mdr-1 expression and up-reg-ulation of Topo Ⅱ beta expression. Key words: Scutellaria baicalensis; Gardenia jasminoides; P-glycoprotein; Leukemia
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