Re-188 Enhances the Inhibitory Effect of Bevacizumab in Non-Small-Cell Lung Cancer
作者:Jie Xiao、Xiaobo Xu、Xiao Li、Yanli Li、Guobing Liu、Hui Tan、Hua Shen、Hongcheng Shi、Dengfeng Cheng
DOI:10.3390/molecules21101308
日期:——
The malignant behaviors of solid tumors such as growth, infiltration and metastasis are mainly nourished by tumor neovascularization. Thus, anti-angiogenic therapy is key to controlling tumor progression. Bevacizumab, a humanized anti-vascular endothelial growth factor (VEGF) antibody, plus chemotherapy or biological therapy can prolong survival for cancer patients, but treatment-related mortality is a concern. To improve inhibitory effect and decrease side-effects on non-small-cell lung cancer (NSCLC), we used Re-188, which is a β emitting radionuclide, directly labeled with bevacizumab for radioimmunotherapy in a human A549 tumor model. Cytotoxic assay data showed that, after 188ReO4− or 188Re-bevacizumab at different concentration for 4 and 24 h, a time- and radioactivity does-dependent reduction in cell viability occurred. Also, an apoptosis assay conformed great apoptosis in the 188Re-bevacizumab group compared with controls and other treatment groups. In vivo, tumor volumes in the 188Re-bevacizumab (11.1 MBq/mice) group were not reduced but growth was delayed compared with other groups. Thus, 188Re-bevacizumab enhanced the therapeutic effect of bevacizumab, suggesting a potential therapeutic strategy for NSCLC treatment.
实体瘤的恶性行为,如生长、浸润和转移,主要由肿瘤新生血管形成提供营养。因此,抗血管生成疗法是控制肿瘤进展的关键。贝伐单抗是一种人源化抗血管内皮生长因子(VEGF)抗体,与化疗或生物疗法联合使用可延长癌症患者的生存期,但治疗相关死亡率令人担忧。为了改善抑制效果并减少对非小细胞肺癌(NSCLC)的副作用,我们使用Re-188,这是一种β发射放射性核素,直接标记贝伐单抗,用于人类A549肿瘤模型的放射免疫治疗。细胞毒性测定数据显示,在188ReO4-或188Re-贝伐单抗不同浓度下作用4和24小时后,细胞活力出现时间和放射性依赖性降低。此外,与对照组和其他治疗组相比,188Re-贝伐单抗组中的细胞凋亡测定结果也符合细胞凋亡。在体内,与其他组相比,188Re-贝伐单抗(11.1 MBq/小鼠)组的肿瘤体积没有减少,但生长延迟。因此,188Re-贝伐单抗增强了贝伐单抗的治疗效果,为NSCLC治疗提供了潜在的治疗策略。