CLIN CANCER RES:血管靶向光动力疗法可以增强PD-1/PD-L1通路阻滞抗肿瘤免疫反应

2018-02-25 MedSci MedSci原创

PD-1/PD-L1通路抑制可以有效治疗晚期肾细胞癌。但是其结果变化很大,可能取决于宿主因素,包括肿瘤微环境。使用光敏剂WST11的血管靶向光动力疗法(VTP)可以诱导局部免疫反应。CLIN CANCER RES近期发表了一篇文章,研究光动力疗法是否可以增强PD-1通路抑制的局部和系统抗肿瘤反应。

PD-1/PD-L1通路抑制可以有效治疗晚期肾细胞癌。但是其结果变化很大,可能取决于宿主因素,包括肿瘤微环境。使用光敏剂WST11的血管靶向光动力疗法(VTP)可以诱导局部免疫反应。CLIN CANCER RES近期发表了一篇文章,研究光动力疗法是否可以增强PD-1通路抑制的局部和系统抗肿瘤反应。

作者使用肺转移肾癌鼠模型进行研究。单独使用VTP、单独使用PD-1/PD-L1拮抗性抗体或联合使用VTP和拮抗性抗体治疗原发肿瘤,观察治疗反应,包括原发和转移部位免疫浸润。使用人异种移植肿瘤评估VTP对PD-L1表达的调节作用。研究结果表明,VTP联合系统性PD-1/PD-L1通路阻滞使原发肿瘤减退,阻止肺转移灶生长,延长了鼠模型的生存时间。肿瘤浸润淋巴细胞的分析表明治疗效果与原发肾肿瘤CD8+ Treg细胞和CD4+ FoxP3-Treg比以及肺转移部位T细胞浸润增加有关。此外,VTP治疗人肾细胞癌异种移植模型后可以诱导PD-L1表达。

文章最后认为,VTP联合PD-1/PD-L1通路阻滞具有调节局部免疫和系统抗肿瘤反应的作用。这一联合疗法可能是PD-1/PD-L1通路阻滞耐药的肿瘤的有效治疗措施。

原始出处:
Matthew J.O'Shaughnessy,Katie S.Murray,et al.Systemic Antitumor Immunity by PD-1/PD-L1 Inhibition Is Potentiated by Vascular-Targeted Photodynamic Therapy of Primary Tumors.CLIN CANCER RES.February 2018 doi:10.1158/1078-0432.CCR-17-0186

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    2018-02-27 smartjoy
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    2018-02-26 清风拂面

    谢谢分享学习

    0

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    2018-02-25 天涯183

    非常好的文章.学习了

    0

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    2018-02-25 orangesking

    0

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