在人类第一阶段研究中,首次对DT2216,一种选择性BCL-xL降解剂,在复发/耐药固体恶性瘤患者中进行
Daruka Mahadevan1, Minal Barve2, Devalingam Mahalingam3
1Mays Cancer Center, San Antonio, TX, USA. mahadevand@uthscsa.edu.
Journal of hematology & oncology
|November 13, 2025
概括
DT2216,一种新的BCL-XL降解剂,通过有效降低血小板毒性,在治疗固体瘤方面表现有前途. 建议剂量为0.4 mg/kg IV BIW,该剂量是在第一阶段试验中确定的.
科学领域:
- 在瘤学瘤学.
- 药理学 药理学是指药理学的学科.
- 临床试验 临床试验
背景情况:
- 作为BCL-XL抑制剂的纳维托克拉斯 (Navitoclax) 导致了剂量限制的血小板缺血症.
- DT2216通过VHL E3结合酶选择性降解BCL-XL,最大限度地降低血小板毒性.
- 在血小板中,VHL E3酶表达率较低,这有助于减少DT2216的毒性.
研究的目的:
- 评估DT2216在患有固体瘤的患者中的安全性和耐受性.
- 为了确定DT2216.2的推第二阶段剂量 (RP2D).
- 评估DT2216.的初步疗效和药理动力学特征.
主要方法:
- 一个剂量升级研究 (3+3设计) 用DT2216每周两次静脉注射 (BIW).
- 剂量范围从0.04到0.4毫克/公斤.
- 纳入了患有晚期固体瘤的患者,这些患者在标准治疗中进展. 每8周进行一次瘤评估.
主要成果:
- 招募了20名患者;观察到一种剂量限制性毒性 (4级血小板狭窄症),并在48小时内消失.
- 在20%的患者中观察到稳定的疾病,所有病例的血小板数量都迅速恢复.
- DT2216表现出剂量相对应的药理动力学,没有积累,0.4 mg/kg导致了快速的BCL-XL降解.
结论:
- 推的第二阶段 (RP2D) DT2216的剂量为0.4 mg/kg IV BIW.
- DT2216显示了有利的安全性概况,可管理和短暂的血小板缺血.
- 该药物有效降解周边白细胞中的BCL-XL,支持其治疗潜力.
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