Safety of new androgen receptor inhibitors (ARi) in patients with nonmetastatic castration-resistant prostate cancer (nmCRPC): a network meta-analy...

Date 30 September 2019
Event ESMO 2019 Congress
Session Poster Display session 3
Topics Prostate Cancer
Presenter Amelia Altavilla
Citation Annals of Oncology (2019) 30 (suppl_5): v325-v355. 10.1093/annonc/mdz248
Authors A. Altavilla1, M. Di Maio2, M. Tucci3, C. Lolli1, G. Schepisi1, C. buttigliero4, F. vignani5, U. De Giorgi1
  • 1Medical Oncology, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 - Meldola/IT
  • 2Medical Oncology, University of Turin, Ordine Mauriziano Hospital, 10128 - Turin/IT
  • 3Medical Oncology, Cardinal Massaia Hospital, asti/IT
  • 4Medical Oncology, University of Turin, San Luigi Gonzaga Hospital, 10043 - Orbassano/IT
  • 5Medical Oncology, Ordine Mauriziano Hospital, 10128 - Turin/IT

Abstract

Background

Three recent RCT (Spartan, Prosper and Aramis) have demonstrated improved metastasis-free survival with new ARi Apalutamide (A), Enzalutamide (E) and Darolutamide (D), respectively, vs placebo (pl) in nmCRPC. We conducted a meta-analysis of RCT to evaluate the safety of ARi.

Methods

Random-effects meta-analysis was performed to describe pooled odds ratio (OR) vs pl and presence of heterogeneity in the effect among RCT. Network meta-analysis was performed to describe OR of indirect comparisons.

Results

4104 patients were included in safety analysis. Many adverse events (AEs) (falls, fractures, fatigue, nausea, diarrhea, hypertension, rash) showed a significant difference in the incidence in patients receiving pl, mostly higher in the Spartan trial. The use of ARi was associated with an higher risk of developing selected AEs compared to pl: serious AEs (OR 1.28, 95%CI 1.10-1.50); falls (OR 1.81, 95%CI 1.40-2.34); fractures (OR 1.58, 95%CI 1.11-2.23); fatigue (all grades OR 2.00, 95%CI 1.68-2.39; severe OR 2.21, 95%CI 1.06-4.60); rash (OR 4.90, 95%CI 3.24-7.41); diarrhea (OR 1.24, 95%CI 1.00-1.54); hypertension (all grades OR 1.55, 95%CI 1.25-1.92; severe OR 1.44, 95%CI 1.08-1.92); dizziness (OR 1.67, 95%CI 1.26-2.21), mental impairment (OR 1.73, 95%CI 1.13-2.66). Significant heterogeneity in the effect among ARi was found for falls (D better than E: OR 0.29, 95%CI 0.14-0-60; D better than A: OR 0.48, 95%CI 0.25-0.91); fatigue all grades (D better than E: OR 0.59, 95%CI 0.39-0.88; A better than E: OR 0.61, 95%CI 0.44-0.84) and severe (D Better than E: OR 0.10, 95%CI 0.02-0.60); hypertension (D better than E: OR 0.51, 95%CI 0.27-0.98; A better than E: OR 0.53, 95%CI 0.31-0.92); mental impairment (D better than E: OR 0.15, 95%CI 0.04-0.58; D better than A: OR 0.24, 95%CI 0.06-0.90). No significant heterogeneity was found for other AEs.

Conclusions

With the limitations of the network meta-analysis, our findings suggest that the use of ARi in nmCRPC is associated with a statistically significant increased risk of developing selected AEs according to the type of agent used. Potential specific toxicities should be considered before starting ARi in nmCRPC.

Clinical trial identification

Editorial acknowledgement

Legal entity responsible for the study

The authors.

Funding

Has not received any funding.

Disclosure

A. Altavilla: Travel / Accommodation / Expenses: Pfizer; Travel / Accommodation / Expenses: Janssen. M. Di Maio: Honoraria (self): Bristol-Myers Squibb; Honoraria (self): Merck Sharp & Dohme; Honoraria (self): Roche; Honoraria (self): AstraZeneca; Honoraria (self): Janssen; Honoraria (self): Takeda; Research grant / Funding (institution): Tesaro. M. Tucci: Honoraria (self): Astellas; Honoraria (self): Janssen; Honoraria (self): Bayer; Honoraria (self): Sanofi. U. De Giorgi: Research grant / Funding (institution): AstraZeneca; Research grant / Funding (institution): roche; Advisory / Consultancy, Research grant / Funding (institution): Sanofi; Advisory / Consultancy: Astellas; Advisory / Consultancy: Bayer; Advisory / Consultancy, Travel / Accommodation / Expenses: Bristol Meyer Squibb; Advisory / Consultancy, Travel / Accommodation / Expenses: Ipsen; Advisory / Consultancy, Travel / Accommodation / Expenses: Janssen; Advisory / Consultancy: Merck; Advisory / Consultancy, Travel / Accommodation / Expenses: Pfizer. All other authors have declared no conflicts of interest.