Song Zhiwang, Lin Yun, Zhang Xia, Feng Chan, Lu Yonglin, Gao Yong, Dong Chunyan
Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China.
Int J Nanomedicine. 2017 Mar 10;12:1941-1958. doi: 10.2147/IJN.S125573. eCollection 2017.
Apatinib is an oral tyrosine kinase inhibitor, which selectively targets vascular endothelial growth factor receptor 2 and has the potential to treat many tumors therapeutically. Cyclic arginylglycylaspartic acid (cRGD)- and polyethylene glycol (PEG)-modified liposomes (cRGD-Lipo-PEG) were constructed to act as a targeted delivery system for the delivery of apatinib to the human colonic cancer cell line, HCT116. These cRGD-modified liposomes specifically recognized integrin αβ and exhibited greater uptake efficiency with respect to delivering liposomes into HCT116 cells when compared to nontargeted liposomes (Lipo-PEG), as well as greater death of tumor cells and apoptosis. The mechanism by which cRGD-Lipo-PEG targets cells was elucidated further with competition assays. To determine the anticancer efficacy in vivo, nude mice were implanted with HCT116 xenografts and treated with apatinib-loaded liposomes or free apatinib intravenously or via intragastric administration. The active and passive targeting of cRGD-Lipo-PEG led to significant tumor treatment targeting ability, better inhibition of tumor growth, and less toxicity when compared with treatments using uncombined apatinib. The results presented strongly support the case for cRGD-Lipo-PEG representing a targeted delivery system for apatinib in the treatment of colonic cancer.
阿帕替尼是一种口服酪氨酸激酶抑制剂,它选择性地作用于血管内皮生长因子受体2,具有治疗多种肿瘤的潜力。构建了环状精氨酰甘氨酰天冬氨酸(cRGD)和聚乙二醇(PEG)修饰的脂质体(cRGD-Lipo-PEG),作为将阿帕替尼递送至人结肠癌细胞系HCT116的靶向递送系统。与非靶向脂质体(Lipo-PEG)相比,这些cRGD修饰的脂质体能够特异性识别整合素αβ,在将脂质体递送至HCT116细胞时表现出更高的摄取效率,同时导致更多的肿瘤细胞死亡和凋亡。通过竞争试验进一步阐明了cRGD-Lipo-PEG靶向细胞的机制。为了确定体内抗癌疗效,将HCT116异种移植瘤植入裸鼠体内,并通过静脉注射或胃内给药的方式用载有阿帕替尼的脂质体或游离阿帕替尼进行治疗。与使用未结合阿帕替尼的治疗方法相比,cRGD-Lipo-PEG的主动和被动靶向作用导致显著的肿瘤治疗靶向能力、更好地抑制肿瘤生长以及更低的毒性。所呈现的结果有力地支持了cRGD-Lipo-PEG作为阿帕替尼治疗结肠癌的靶向递送系统的情况。