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Antisense Therapy

Complete Reversal of Multidrug Resistance Phenotype Not Possible in Leukemia Cells

Published in Gene Therapy Weekly, June 15th, 2000

Research from Germany indicates it is not feasible to achieve complete reversal of the multidrug resistance (MDR) phenotype in human leukemia cells with mdr1-targeted antisense oligonucleotides.

"The purpose of the current study was to characterize the effect of chimeric AS-ODNs encapsulated with cationic lipids on MDR in human leukemia cells and to determine if this modification of the ODN alone or in combination with the cationic lipid might offer advantages over classical ODN treatment with free unmodulated or phosphorothiolated AS-ODNs," wrote H. Dassow and colleagues, University of Leipzig, Germany. "Furthermore, we extended the antisense method to the use of...

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