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Chiara Giommarelli Valentina Zuco Enrica Favini Claudio Pisano Fabrizio Dal Piaz Nunziatina De Tommasi Franco Zunino 《Cellular and molecular life sciences : CMLS》2010,67(6):995-1004
Curcumin, a natural polyphenol, has been described to exhibit effects on signaling pathways, leading to induction of apoptosis.
In this study, we observed that curcumin inhibited Hsp90 activity causing depletion of client proteins implicated in survival
pathways. Based on this observation, this study was designed to investigate the cellular effects of curcumin combination with
the pan-HDAC inhibitors, vorinostat and panobinostat, which induce hyperacetylation of Hsp90, resulting in inhibition of its
chaperone function. The results showed that, at subtoxic concentrations, curcumin markedly sensitized tumor cells to vorinostat-
and panobinostat-induced growth inhibition and apoptosis. The sensitization was associated with persistent depletion of Hsp90
client proteins (EGFR, Raf-1, Akt, and survivin). In conclusion, our findings document a novel mechanism of action of curcumin
and support the therapeutic potential of curcumin/HDAC inhibitors combination, because the synergistic interaction was observed
at pharmacologically achievable concentrations, which were ineffective when each drug was used alone. 相似文献
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