To examine whether HSP70 expression is correlated with AR and AR-V7 expression in advanced prostate cancer, 26 high Gleason score (≥8) patients’ samples were collected and the levels of HSP70, AR-V7, along with HSP90 and AR-FL were examined by qRT-PCR (Supplementary Table 1). The gene discussed is HSP90AA1; the disease is prostate cancer.