abiraterone-acetate and Neoplasms

Abiraterone acetate (CB 7630; CB7630; JNJ-212082), the 3β-acetate prodrug of abiraterone, is structurally related to ketoconazole and is being developed by Cougar Biotechnology as a hormonal therapy for advanced prostate and breast cancers. As a selective inhibitor of adrenal androgens, it is thought to be a safer product than existing second-line hormonal therapies. This review discusses the key development milestones and therapeutic trials of this drug.

Topics: Abiraterone Acetate; Androgen Antagonists; Androstadienes; Animals; Antineoplastic Agents, Hormonal; Drug Evaluation, Preclinical; Drugs, Investigational; Humans; Neoplasms; Prodrugs

To characterize safety and tolerability of the selective PI3Kβ inhibitor AZD8186, identify a recommended phase II dose (RP2D), and assess preliminary efficacy in combination with abiraterone acetate or vistusertib.. This phase I open-label study included patients with advanced solid tumors, particularly prostate cancer, triple-negative breast cancer, and squamous non-small cell lung cancer. The study comprised four arms: (i) AZD8186 monotherapy dose finding; (ii) monotherapy dose expansion; (iii) AZD8186/abiraterone acetate (with prednisone); and (iv) AZD8186/vistusertib. The primary endpoints were safety, tolerability, and identification of the RP2D of AZD8186 monotherapy and in combination. Secondary endpoints included pharmacokinetics (PK), pharmacodynamics, and tumor and prostate-specific antigen (PSA) responses.. In total, 161 patients were enrolled. AZD8186 was well tolerated across all study arms, the most common adverse events being gastrointestinal symptoms. In the monotherapy dose-finding arm, four patients experienced dose-limiting toxicities (mainly rash). AZD8186 doses of 60-mg twice daily [BID; 5 days on, 2 days off (5:2)] and 120-mg BID (continuous and 5:2 dosing) were taken into subsequent arms. The PKs of AZD8186 were dose proportional, without interactions with abiraterone acetate or vistusertib, and target inhibition was observed in plasma and tumor tissue. Monotherapy and combination therapy showed preliminary evidence of limited antitumor activity by imaging and, in prostate cancer, PSA reduction.. AZD8186 monotherapy had an acceptable safety and tolerability profile, and combination with abiraterone acetate/prednisone or vistusertib was also tolerated. There was preliminary evidence of antitumor activity, meriting further exploration of AZD8186 in subsequent studies in PI3Kβ pathway-dependent cancers.

Topics: Abiraterone Acetate; Aniline Compounds; Carcinoma, Non-Small-Cell Lung; Chromones; Humans; Lung Neoplasms; Male; Neoplasms; Prednisone; Prostate-Specific Antigen; Prostatic Neoplasms

Topics: Abiraterone Acetate; Adenine; Antineoplastic Agents; Clinical Protocols; Dasatinib; Drug Costs; France; gamma-Glutamyl Hydrolase; Humans; Insurance, Pharmaceutical Services; Medical Oncology; Neoplasms; Nivolumab; Piperidines; Protein Kinase Inhibitors; Pyrazoles; Pyrimidines; Recombinant Proteins; United States; Zoledronic Acid