PD1+溶瘤病毒,奥源和力公布OrienX010一项黑色素瘤Ib期研究结果

2020-09-21 医药魔方 医药魔方

9月19日,来自北京肿瘤医院郭军团队的斯璐教授在CSCO2020大会上报告了重组人GM-CSF单纯疱疹病毒注射液(OrienX010)联合特瑞普利单抗(PD-1单抗)治疗在可完全切除的 III期及IV

9月19日,来自北京肿瘤医院郭军团队的斯璐教授在CSCO2020大会上报告了重组人GM-CSF单纯疱疹病毒注射液(OrienX010)联合特瑞普利单抗(PD-1单抗)治疗在可完全切除的 III期及IV期(M1a)黑色素瘤患者中的临床Ib数据,研究显示了良好的术前辅助作用和安全性。此前公开的数据显示,OrienX010在既往经系统治疗失败、不可切除但可接受瘤内注射的ⅢB-Ⅳ期(M1a,b)黑色素瘤患者中的总有效率为28.6%。

OrienX010是奥源和力以单纯疱疹病毒为载体开发的新型基因治疗药物,并拥有自主知识产权,曾获得卫生部国家重大新药创制项目支持。OrienX010是一种经重组减毒的复制型I型单纯疱疹病毒(Type I Herpes Simplex Virus, HSV-1)溶瘤性载体,OrienX010基因组中删除了HSV-1的致病基因,并插入了编码人GM-CSF的DNA片段,能够选择性地在肿瘤细胞中进行病毒复制,导致肿瘤细胞裂解死亡,同时释放肿瘤抗原,并通过载体表达的GM-CSF蛋白激活全身抗肿瘤抗原的特异性免疫反应。

01研究设计

该项Ib期研究是在肢端黑色素瘤患者中开展的术前辅助治疗试验,旨在评估能否了给患者争取更好的疾病控制和生存获益。入组了30例符合方案要求的 III期肢端黑色素瘤患者,采用OrienX010超声引导下的瘤内注射(最多10mL,Q2W)+静脉注射特瑞普利单抗(3mg/kg,Q2W)。

研究的主要终点是安全性、病理缓解率(pPR, pCR、Major PR)和影像学客观缓解率。次要终点包括1年无复发生存率、2年无复发生存率和总生存率。

▲试验设计(来源:CSCO 2020)

02研究结果

截止2020年9月3日,完成26例受试者筛选并成功入组19例,9例患者在接受辅助治疗后接受手术,7例患者仍在接受新辅助治疗,8例患者接受术后辅助治疗,暂无受试者复发。

在术前接受影像学评估的受试者(n=10)中,客观缓解率达到20%,疾病控制率为40%。接受手术的受试者(n=9),经病理学确认的总体pPR为75%,其中病理学完全缓解或接近完全缓解的达到25%。

61.2%的受试者报告1级或2级与药物相关不良事件,无3级及以上与药物相关的不良事件报告。常见(>10%)的与药物相关不良事件为发热、胆红素升高、谷氨酰基转移酶升高、促甲状腺激素升高、皮疹等。无死亡事件,无受试者报告与药物治疗相关的严重不良事件。

▲研究结果(来源:CSCO 2020)

03研究结论

斯璐教授认为:对于可完全切除的III期及IV期(M1a)黑色素瘤患者,给予瘤内注射溶瘤病毒OrienX010联合静脉输注特瑞普利单抗的新辅助治疗,初步显示了令人期待的肿瘤疗效,并且安全可耐受,后续研究正在进行中,以进一步评价该新辅助疗法的临床疗效和安全性。在讨论中,斯璐教授特别提到,对于黑色素瘤,PET-CT的评价可能优于常规CT。

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    2021-05-17 sunylz
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    2020-12-01 bioon3
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