Clin Cancer Res:Avelumab+Trabectedin联合治疗晚期脂肪/平滑肌肉瘤

2022-04-05 xiaozeng MedSci原创

Avelumab+Trabectedin联合治疗晚期脂肪/平滑肌肉瘤的无进展生存期优于既往研究

平滑肌肉瘤 (LMS) 和脂肪肉瘤 (LPS) 多表达PD-L1,但通常会对PD-1/PD-L1抑制剂 (ICI) 产生耐药性。曲贝替定 (Trabectedin) 是一种四氢异喹啉生物碱,具有有效的抗肿瘤活性,目前已获得PDA批准治疗平滑肌肉瘤和脂肪肉瘤。

本研究是一项单臂、开放标签的1/2期试验,旨在评估曲贝替定联合抗PD-L1抗体Avelumab治疗晚期平滑肌肉瘤和脂肪肉瘤的有效性和安全性。

1期阶段评估了曲贝替定(1、1.2 和 1.5 mg/m2)联合标准剂量Avelumab的安全性和可行性。2期阶段的主要终点是客观缓解率(ORR)。相关性研究包括T细胞受体测序、多重免疫组化和肿瘤基因表达分析。


3-5级治疗相关不良反应

共招募了33位患者:24例平滑肌肉瘤(6例子宫肉瘤,18例非子宫肉瘤)和11例脂肪肉瘤。在1期阶段,在曲贝替定 1.2 mg/m2 和1.5 mg/m2剂量组的6位患者中各观察到两例剂量限制性毒性。因此,推荐的2期剂量为曲贝替定 1.0 mg/m2 + Avelumab 800 mg。


无进展生存率和总生存率

在23位采用推荐的2期剂量治疗的患者中,有3位(13%)患者获得了部分缓解,10位(43%)患者的病情保持稳定。6个月无进展生存率是52%,中位无进展生存期是8.3个月。与病情稳定或病情进展的患者相比,获得部分缓解的患者外周血单核细胞的T细胞受体测序的辛普森单克隆评分更高(0.182 vs 0.067 vs 0.064,p≤0.01)。

总之,虽然该试验未能达到主要客观缓解率终点,但无进展生存期优于曲贝替定的既往研究,值得进一步调查

 

原始出处:

Wagner Michael J,Zhang Yuzheng,Cranmer Lee D et al. A Phase 1/2 Trial Combining Avelumab and Trabectedin for Advanced Liposarcoma and Leiomyosarcoma.[J] .Clin Cancer Res, 2022, https://doi.org/10.1158/1078-0432.CCR-22-0240.

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    2022-11-05 bsmagic9140
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    2022-07-15 snf701207
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    2022-08-16 aliceclz
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    2022-04-06 fangcong

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