Clinical effect of abiraterone acetate in Korean patients with metastatic castration-resistant prostate cancer according to duration of androgen deprivation therapy
Kim Ki-Bom, 조정기, 안소연, 이상철, 정성진, 홍성규, 변석수, 이상은,
소속 상세정보
( Kim Ki-Bom )
Seoul National University Bundang Hospital Department of Urology
조정기 ( Jo Jung-Ki )
Seoul National University Bundang Hospital Department of Urology
안소연 ( Ahn So-Yeon )
Seoul National University Bundang Hospital Medical Research Collaborating Center
이상철 ( Lee Sang-Chul )
Seoul National University Bundang Hospital Department of Urology
정성진 ( Jeong Seong-Jin )
Seoul National University Bundang Hospital Department of Urology
홍성규 ( Hong Sung-Kyu )
Seoul National University Bundang Hospital Department of Urology
변석수 ( Byun Seok-Soo )
Seoul National University Bundang Hospital Department of Urology
이상은 ( Lee Sang-Eun )
Seoul National University Bundang Hospital Department of Urology
KMID : 0358320150560080580
Abstract
Purpose: Few data are available concerning the clinical outcome of abiraterone acetate treatment in patients with metastatic castration-resistant prostate cancer (mCRPC) in terms of the duration of androgen deprivation therapy (ADT) before diagnosis of CRPC. We investigated the clinical efficacy of abiraterone acetate according to the duration of ADT.
Materials and Methods: We reviewed the medical records of 20 patients with mCRPC who received abiraterone acetate after failure of docetaxel chemotherapy from May 2012 to March 2014 at Seoul National University Bundang Hospital. Clinical factors including prostate-specific antigen (PSA) nadir level, time to PSA nadir, PSA doubling time, PSA response, and modes of progression (PSA, radiologic, clinical) were analyzed. Disease progression was classified according to the Prostate Cancer Working Group 2 criteria.
Results: The mean age and PSA value of the entire cohort were 76.0±7.2 years and 158.8±237.9 ng/mL, respectively. The median follow-up duration was 13.4±6.7 months. There were no statistically significant differences in clinical characteristics between patients who received abiraterone acetate with ADT duration<35 months and those who received abiraterone acetate with ADT duration≥35 months. There were also no significant differences in terms of PSA progression-free survival, radiologic progression-free survival, and clinical progression-free survival between patients with ADT duration<35 months and those with ADT duration ≥35 months.
Conclusions: Although this was a retrospective study with a small sample size, we did not observe any statistically significant differences in the clinical response to abiraterone acetate between mCRPC patients with long ADT duration and those with short ADT duration in terms of disease progression-free survival.
키워드
Abiraterone ; Androgen receptor antagonists ; Prostate neoplasms
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