在PTEN缺乏的转移性荷尔蒙敏感前列腺癌中,capivasertib加上abiraterone:CAPItello-281第三阶段研究
K Fizazi1, N W Clarke2, M De Santis3
1Department of Cancer Medicine, Institut Gustave Roussy, Centre Oscar Lambret, University of Paris Saclay, Villejuif, France.
概括
在转移性激素敏感前列腺癌中,capivasertib加上abiraterone在患有PTEN缺陷瘤的患者中改善了无放射性进展的存活率. 这种组合疗法为这种患者群体提供了一种新的治疗选择.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 临床试验 临床试验
背景情况:
- 在转移性激素敏感前列腺癌 (mHSPC) 中的PTEN缺乏激活PI3K/AKT通路,驱动ARPI独立的增殖.
- 这种激活导致mHSPC患者的治疗结果较差.
- 针对PI3K/AKT和AR路径的双抑制是一种潜在的治疗策略.
研究的目的:
- 评估在PTEN缺乏的mHSPC患者中capivasertib加abiraterone的疗效和安全性.
- 评估双通路抑制对无放射性进展生存率 (rPFS) 和整体生存率 (OS) 的影响.
主要方法:
- 在CAPItello-281试验中,PTEN缺乏mHSPC的患者随机接受capivasertib或安慰剂,结合abiraterone,prednisone/prednisolone和雄激素剥夺疗法 (ADT).
- PTEN缺乏症被定义为≥90%的活跃恶性细胞缺乏特定的细胞质PTEN染色的诊断断断.
- 主要终点是研究人员评估的RPFS;OS是一个关键的次要终点. 在不同的PTEN损失值下进行了探索性子组分析.
主要成果:
- 大约25.3%的患者患有PTEN缺乏的瘤.
- 与安慰剂加上阿比拉 (25.7个月) 相比,capivasertib加上阿比拉显著改善了PTEN缺乏人群中的中位数RPFS (33.2个月) (HR 0.81,P=0.034).
- 在不同的PTEN损失值中观察到一致的rPFS益处,而在OS中没有显著的改善 (HR0.90). 常见的不良事件包括腹,高血糖和皮疹.
结论:
- 在PTEN缺乏的mHSPC患者中,capivasertib加上abiraterone显示了7.5个月的RPFS中位数的改善.
- 安全性概况与已知的单个药物的副作用一致.
- 用capivasertib和abiraterone对PI3K/AKT和AR通路的双重阻断是PTEN缺陷mHSPC患者的一个有益的策略.
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