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轉移性去勢抗性攝護腺癌患者接受鐳-223的治療結果:乳酸脫氫酶作為追蹤和存活預測因子

摘要


鐳-223(Radium-223, Ra-223)是一種釋放α粒子的同位素,可抑制骨骼轉移,並防止患有轉移性去勢抗性攝護腺癌(metastatic castration-resistant prostate cancer, mCRPC)的患者出現骨骼相關事件(skeletal-related events, SREs)。我們回顧性地分析了於2019年1月全民健保開始給付鐳-223之前,使用鐳-223的治療反應、預測因子和不良事件(adverse effects, AEs)。我們將患者分為疾病進展(progressive disease, PD)組和臨床受益(clinical benefit, CB)組,收集治療前後的抽血數據,並繪製關於鹼性磷酸酶(ALP)、乳酸脫氫酶(LDH)和攝護腺特異抗原(PSA)百分比變化的蛛網圖,另外將疾病進展/臨床受益、治療前ALP、LDH、PSA的基礎值當作整體存活期(overall survival, OS)的分層因子以進行分析。結果在19名患者中,有5名(26.3%)屬於疾病進展組,14名(73.7%)屬於臨床受益組。兩個組別的基本背景和治療前抽血數據沒有顯著差異,因而無法找到事先預測治療反應的因子。鐳-223治療後ALP、LDH和PSA的百分比變化,在兩組間皆有統計學上的顯著差異(ALP:54.3% vs. 77.6%,p=0.044;LDH:88.2% vs. 138.3%,p=0.046;PSA:97.8% vs.277.0%,p=0.002),而又以LDH在蛛網圖中兩組的趨勢呈現顯著分離。臨床受益組的整體存活期中位數長於疾病進展組(20.50個月vs. 9.43個月,p=0.009)。LDH基礎值<250 U/L的患者可能有較長的整體存活期,雖未達到顯著差異,但LDH 潛在具有預測整體存活期的潛力。最後兩個組別間的不良事件並無顯著差異。

參考文獻


Chen PY, Chiang PC, Kang CH, et al. Radium-223 in the treatment of metastatic prostate cancer: preliminary experience in Taiwan. In: Taiwan urology association annual meeting 2019 Taichung, Taiwan.
Nguyen NC, Shah M, Appleman LJ, et al. Radium-223 Therapy for patients with metastatic castrate-resistant prostate cancer: An update on literature with case presentation. Int J Mol Imaging 2016;2016:2568031.
Parker C, Nilsson S, Heinrich D, et al. Alpha emitter radium-223 and survival in metastatic prostate cancer. N Engl J Med 2013;369:213-23.
Kerr C. (223)Ra targets skeletal metastases and spares normal tissue. Lancet Oncol 2002;3:453.
Parikh S, Murray L, Kenning L, et al. Real-world Outcomes and Factors Predicting Survival and Completion of Radium 223 in Metastatic Castrate-resistant Prostate Cancer. Clin Oncol (R Coll Radiol) 2018;30:548-55.

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