Sipuleucel-T in metastatic castration-resistant prostate cancer (mCRPC) patients ≥80 years-old: Data from PROCEED.
2014
64 Background: Sipuleucel-T is an autologous cellular immunotherapy indicated for asymptomatic or minimally symptomatic mCRPC based on data from the pivotal phase 3 IMPACT trial that demonstrated a 22% reduction in the risk of death. Given the high prevalence of older men in the mCRPC patient (pt) population, we sought to understand disease characteristics and sipuleucel-T product parameters in pts ≥80 years (yrs). Methods: PROCEED is an ongoing phase 4 registry enrolling pts treated with sipuleucel-T within ≤6 months. Baseline pt demographics and disease characteristics were collected. Sipuleucel-T product parameters that were assessed included: total nucleated cell (TNC) count, antigen presenting cell (APC) count (large CD54+ cells), and APC activation (upregulation of CD54; a measure of product potency). Results: As of May 2013, 1254 subjects were enrolled and have completed treatment. Of these, 278 (20%) pts were ≥80 yrs-old. Disease and infused product characteristics in pts ≥80 yrs vs. <80 yrs are d...
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