期刊
EUROPEAN UROLOGY
卷 67, 期 4, 页码 795-802出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.eururo.2014.10.027
关键词
Prostate cancer; PTEN; Abiraterone acetate; Immunohistochemistry
资金
- Cancer Research UK Centre grant
- Experimental Cancer Medical Centre (ECMC) grant from Cancer Research UK
- Department of Health [C51/A7401]
- Prostate Cancer UK [110844]
- Prostate Cancer Foundation Project grants [20131017]
- Wellcome Trust
- Swiss Cancer League [BIL KLS-02592-02-2010]
- Cancer Research UK Clinician Scientist Fellowship
- Spanish Medical Oncology Society
- NHS
- Cancer Research UK [13239] Funding Source: researchfish
- Medical Research Council [G0502133] Funding Source: researchfish
- National Institute for Health Research [CL-2008-22-001, NF-SI-0611-10106] Funding Source: researchfish
- Prostate Cancer UK [PG12-49] Funding Source: researchfish
- MRC [G0502133] Funding Source: UKRI
Background: Loss of the tumor suppressor phosphatase and tensin homolog (PTEN) occurs frequently in prostate cancers. Preclinical evidence suggests that activation of PI3K/AKT signaling through loss of PTEN can result in resistance to hormonal treatment in prostate cancer. Objective: To explore the antitumor activity of abiraterone acetate (abiraterone) in castration-resistant prostate cancer (CRPC) patients with and without loss of PTEN protein expression. Design, setting, and participants: We retrospectively identified patients who had received abiraterone and had hormone-sensitive prostate cancer (HSPC) and/or CRPC tissue available for PTEN immunohistochemical analysis. Outcome measurements and statistical analysis: The primary end point was overall survival from initiation of abiraterone treatment. Relationship with outcome was analyzed using multivariate Cox regression and log-rank analyses. Results and limitations: A total of 144 patients were identified who had received abiraterone post-docetaxel and had available tumor tissue. Overall, loss of PTEN expression was observed in 40% of patients. Matched HSPC and CRPC tumor biopsies were available for 41 patients. PTEN status in CRPC correlated with HSPC in 86% of cases. Loss of PTEN expression was associated with shorter median overall survival (14 vs 21 mo; hazard ratio [HR]: 1.75; 95% confidence interval [CI], 1.19-2.55; p = 0.004) and shorter median duration of abiraterone treatment (24 vs 28 wk; HR: 1.6; 95% CI, 1.12-2.28; p = 0.009). PTEN protein loss, high lactate dehydrogenase, and the presence of visceral metastases were identified as independent prognostic factors in multivariate analysis. Conclusions: Our results indicate that loss of PTEN expression was associated with worse survival and shorter time on abiraterone treatment. Further studies in larger and prospective cohorts are warranted. Patient summary: PTEN is a protein often lost in prostate cancer cells. In this study we evaluated if prostate cancers that lack this protein respond differently to treatment with abiraterone acetate. We demonstrated that the survival of patients with loss of PTEN is shorter than patients with normal PTEN expression. (C) 2014 European Association of Urology. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据