From 2011...I must investigate where they are now, I thought HP90 inhibition through alvespimycin was something new (from one of the articles I have posted today), but it has been around at least since 2011...and look at the results (ok, single patient) on prostate cancer.
aacrjournals.org/clincancer...
"At 80 mg/m2 client protein (CDK4, LCK) depletion was detected and tumor samples from 3 of 5 patients confirmed HSP90 inhibition. Clinical activity included complete response (castration refractory prostate cancer, CRPC 124 weeks)"
UPDATE: they did not go on with that specific HP90 inhibitor (alvespimycin) because of toxicity...