Journal
CANCER CELL
Volume 10, Issue 4, Pages 321-330Publisher
CELL PRESS
DOI: 10.1016/j.ccr.2006.09.005
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Although androgen receptor (AR)-mediated signaling is central to prostate cancer, the ability to modulate AIR signaling states is limited. Here we establish a chemical genomic approach for discovery and target prediction of modulators of cancer phenotypes, as exemplified by AIR signaling. We first identify AIR activation inhibitors, including a group of structurally related compounds comprising celastrol, gedunin, and derivatives. To develop an in silico approach for target pathway identification, we apply a gene expression-based analysis that classifies HSP90 inhibitors as having similar activity to celastrol and gedunin. Validating this prediction, we demonstrate that celastrol and gedunin inhibit HSP90 activity and HSP90 clients, including AR. Broadly, this work identifies new modes of HSP90 modulation through a gene expression-based strategy.
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