[RNAi targeting of Bcr-Abl increases chronic myeloid leukemia cell killing by 17-AAG]
>>Leuk Res. 2005 Oct 27; [Epub ahead of print]
RNA interference targeting of Bcr-Abl increases chronic myeloid leukemia cell killing by 17-allylamino-17-demethoxygeldanamycin.
Withey JM, Harvey AJ, Crompton MR.
School of Biological Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK.
17-Allylamino-17-demethoxygeldanamycin (17-AAG) induces degradation of Hsp90 client proteins, including Bcr-Abl, however, its clinical use as an anti-tumor agent may be limited by toxicity and modest efficacy. We reasoned that Bcr-Abl targeting by RNA interference (RNAi) might selectively increase the activity of 17-AAG against Bcr-Abl+ leukemia cells. 17-AAG in combination with targeting small interfering RNAs (siRNAs) reduced Bcr-Abl protein levels, triggered increases in markers of apoptosis and decreased cell viability more effectively than did control siRNA and 17-AAG together, or Bcr-Abl targeting siRNA alone. Combination targeting strategies such as this may therefore achieve enhanced therapeutic potency.<<
Cheers, Tuck |
