CLIN CANCER RES:抗肿瘤干细胞药物Ipafricept治疗晚期实体瘤患者

2017-12-17 MedSci MedSci原创

Wnt信号与肿瘤细胞去分化及肿瘤干细胞功能关系密切。Ipafricept(OMP-54F28)是一种重组融合蛋白,将人frizzled 8受体胞外部分与可跟Wnt配体结合的IgG1 Fc片段融合。CLIN CANCER RES近期发表了一篇文章,评估Ipafricept在实体瘤患者中的疗效。

Wnt信号与肿瘤细胞去分化及肿瘤干细胞功能关系密切。Ipafricept(OMP-54F28)是一种重组融合蛋白,将人frizzled 8受体胞外部分与可跟Wnt配体结合的IgG1 Fc片段融合。CLIN CANCER RES近期发表了一篇文章,评估Ipafricept在实体瘤患者中的疗效。

患者每三周接受Ipafricept静脉输入。主要的研究目标为剂量限制毒性(DLT),推荐Ⅱ期试验剂量(RP2D),安全性,药代动力学(PK),免疫原性,药效学(PD)和初步的效果。共27例患者接受4个不同剂量药物治疗(0.5,1,2.5,5,10,15和20mg/kg)。由于PK模型研究表明目标有效剂量为10mg/kg且在20mg/kg时出现脆性骨折,所以未进行更高剂量试验。最常见的1级和2级不良反应为味觉障碍,食欲下降,虚弱和肌肉痉挛。Ipafricept相关3级不良反应包括低磷血症和体重下降。Ipafricept半衰期为4天,抗药物抗体发生率低。6例患者β-CTX为基线的2倍,这一结果是可逆的。Wnt通路基因药效学调整在剂量≥2.5mg/kg后出现。2例硬纤维瘤患者和1例生殖细胞癌患者病情稳定超过6个月。

文章最后认为,Ipafricept耐受性良好,在硬纤维瘤和生殖细胞癌患者中观察到病情稳定时间延长。

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    2017-12-17 明天会更好!

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