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Antolín Alfredo Rodríguez, Otero Javier Romero, Ojeda José Duarte, González Lucía García, Sutil Raquel Sopeña, Padilla Daniel González, Rojo Esther García, Quintas Juan Justo, López Bernardino Miñana
Archivos Españoles de Urología.
2018, 71(3):
267-275.
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OBJECTIVES: The treatment of metastaticprostate cancer has remained unchanged for more than70 years, based on androgen deprivation therapy (ADT).In 2015, following the CHAARTED and STAMPEDEtrials, it was established that the addition of 6 cyclesof docetaxel to ADT was associated with significantlyincreased survival. In June 2017, the LATITUDE trialand the G arm of the STAMPEDE trial showed that theaddition of Abiraterone with Prednisone (5 mg/day) toADT was also associated with a significant increase insurvival in metastatic patients. The present study analyzesthese two trials.RESULTS: LATITUDE demonstrated a 38% reduction inthe risk of death (HR=0.62, 95% CI, 0.61-0.76) inalmost all sub-groups. Risk reduction for radiologicalprogression was 53% (HR=0.47, 95% CI 0.39-0.55).Secondary objectives such as prostate specific antigenprogression, time to chemotherapy or a new skeletalevent are also significantly delayed.STAMPEDE also showed that the combination ofAbiraterone and Prednisone is associated with a37% increase in survival (HR=0.63, 95% CI, 0.52-0.76, p<0.001) in metastatic patients, but not in nonmetastaticpatients. Progression-free survival was greatlyimproved in this arm (HR=0.29, 95% CI 0.25-0.34,p<0.001). The side effects reported show the knownpattern of mineral corticosteroid excess with increasedblood pressure, hypokalemia, and of liver enzymeselevation.CONCLUSIONS: The indirect comparison of docetaxeland abiraterone studies confirms that both populationsand results are comparable. Two comparative indirectmetanalysis (>6000 patients) gave marginal superiorityto abiraterone. In favor of abiraterone we have that it isan oral, comfortable medication with a good toleranceprofile and side effects that are easy to manage,useful in patients who are old and fragile, in whomchemotherapy may not be indicated; the downsides areprolonged exposure to the drug and its current price.Future trials, currently in progress, will determine theideal patient profile, or a potential association of boththerapies.