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pubmed-article:19918367pubmed:abstractTextThis study aims to evaluate the multidrug resistance (MDR) reversal activity by magnetic nanoparticles of Fe3O4 (MNPs-Fe3O4) and 5-bromotetrandrine (BrTet) MDR cell line K562/A02 solitarily or symphysially. The proliferation of K562 and K562/A02 cells and the cytotoxicity on peripheral blood mononuclear cells (PMBCs) were evaluated by MTT assay. Cellular accumulation of daunorubicin (DNR) was analyzed by flow cytometry. Real-time polymerase chain reaction and Western blotting analyses were performed to examine the mRNA and protein levels of mdr1, respectively. The results showed that the combination of MNPs-Fe3O4 and BrTet with effective concentrations significantly increased cytotoxicity against MDR cell line K562/A02. Both BrTet and MNPs-Fe3O4 increased the intracellular DNR accumulation in the K562/A02 cell line, and downregulated the level of mdr1 gene and expression of P-glycoprotein. Furthermore, the combination did not have significant cytotoxicity in PMBCs. We propose that MNPs-Fe3O4 conjugated with DNR and BrTet probably have synergetic effects on MDR reversal.lld:pubmed
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pubmed-article:19918367pubmed:authorpubmed-author:WangXuemeiXlld:pubmed
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pubmed-article:19918367pubmed:authorpubmed-author:LiXiaomaoXlld:pubmed
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pubmed-article:19918367pubmed:articleTitleEffect of magnetic nanoparticles of Fe3O4 and 5-bromotetrandrine on reversal of multidrug resistance in K562/A02 leukemic cells.lld:pubmed
pubmed-article:19918367pubmed:affiliationDepartment of Hematology, The Affiliated Zhongda Hospital, Southeast University, Nanjing 210009, People's Republic of China.lld:pubmed
pubmed-article:19918367pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:19918367pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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