Sipuleucel-T and Androgen Receptor-Directed Therapy for Castration-Resistant Prostate Cancer: A Meta-Analysis

J Immunol Res. 2016:2016:4543861. doi: 10.1155/2016/4543861. Epub 2016 Dec 12.

Abstract

New treatments, such as sipuleucel-T and androgen receptor- (AR-) directed therapies (enzalutamide (Enz) and abiraterone acetate (AA)), have emerged and been approved for the management of castration-resistant prostate cancer (CRPC). There are still debates over their efficacy and clinical benefits. This meta-analysis aimed to investigate the efficacy and safety of sipuleucel-T and AR-directed therapies in patients with CRPC. RevMan 5.1 was used for pooled analysis and analysis of publication bias. Seven studies were included in the meta-analysis, with three studies in sipuleucel-T (totally 737 patients, 488 patients in treatment group, and 249 patients in placebo group) and four in AR-directed therapies (totally 5,199 patients, 3,015 patients in treatment group, and 2,184 patients in placebo group). Treatment with sipuleucel-T significantly improved overall survival in patients with CRPC and was not associated with increased risk of adverse event of grade ≥3 (p > 0.05). However, treatment with sipuleucel-T did not improve time-to-progression and reduction of prostate-specific antigen (PSA) level ≥50% was not significantly different from that with placebo. AR-directed therapies significantly improved overall survival in patients with CRPC and improved time-to-progression and reduction of PSA level ≥50%. AR-directed therapies did not increase risk of adverse event of grade ≥3 (p > 0.05).

Publication types

  • Meta-Analysis
  • Review

MeSH terms

  • Abiraterone Acetate / therapeutic use
  • Antineoplastic Agents / therapeutic use
  • Benzamides
  • Humans
  • Male
  • Nitriles
  • Phenylthiohydantoin / analogs & derivatives
  • Phenylthiohydantoin / therapeutic use
  • Prostate-Specific Antigen / blood*
  • Prostatic Neoplasms, Castration-Resistant / therapy*
  • Receptors, Androgen / drug effects*
  • Tissue Extracts / therapeutic use*

Substances

  • AR protein, human
  • Antineoplastic Agents
  • Benzamides
  • Nitriles
  • Receptors, Androgen
  • Tissue Extracts
  • Phenylthiohydantoin
  • sipuleucel-T
  • enzalutamide
  • Prostate-Specific Antigen
  • Abiraterone Acetate