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RGD和NGR修饰的TRAIL蛋白在体外和体内对TRAIL不敏感的癌细胞表现出强大的抗转移作用。

RGD and NGR modified TRAIL protein exhibited potent anti-metastasis effects on TRAIL-insensitive cancer cells in vitro and in vivo.

作者信息

Wang Xiaofei, Qiao Xinran, Shang Yue, Zhang Shenghua, Li Yi, He Hongwei, Chen Shu-Zhen

机构信息

Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.

出版信息

Amino Acids. 2017 May;49(5):931-941. doi: 10.1007/s00726-017-2395-4. Epub 2017 Feb 24.

Abstract

The tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) has been considered to be a promising anti-tumor agent since the discovery of TRAIL-mediated apoptosis specifically on cancer cells. However, TRAIL resistance of tumor cells and patients remains to be an insurmountable obstacle for its clinical application. Here, we expressed TRAIL-related recombinant protein RGD-TRAIL, TRAIL-NGR, and RGD-TRAIL-NGR by fusing tumor targeting peptides RGD and (or) NGR at the N-terminus and C-terminus, respectively, to not only induce apoptosis of cancer cells but also inhibit metastasis. The fusion proteins possessed potent cytotoxicity with approximative IC50 in H460 and A549 cells, while TRAIL-NGR and RGD-TRAIL-NGR appeared to be more effective in HT1080 and PANC-1 cells which were relatively insensitive to TRAIL. A low concentration of fusion proteins, especially RGD-TRAIL-NGR, could inhibit migration of A549 and HT1080 cells in vitro and lung metastasis in HT1080 experimental model in vivo, indicating that the recombinant protein maintained the function of both TRAIL and targeting peptide RGD and NGR, which improved the sensitivity of tumor cells to TRAIL.

摘要

自发现肿瘤坏死因子相关凋亡诱导配体(TRAIL)可特异性诱导癌细胞凋亡以来,它一直被视为一种很有前景的抗肿瘤药物。然而,肿瘤细胞和患者对TRAIL的耐药性仍然是其临床应用中难以克服的障碍。在此,我们通过分别在N端和C端融合肿瘤靶向肽RGD和(或)NGR来表达TRAIL相关重组蛋白RGD-TRAIL、TRAIL-NGR和RGD-TRAIL-NGR,不仅诱导癌细胞凋亡,还抑制转移。这些融合蛋白在H460和A549细胞中具有强大的细胞毒性,其IC50相近,而TRAIL-NGR和RGD-TRAIL-NGR在对TRAIL相对不敏感的HT1080和PANC-1细胞中似乎更有效。低浓度的融合蛋白,尤其是RGD-TRAIL-NGR,可在体外抑制A549和HT1080细胞的迁移,并在HT1080体内实验模型中抑制肺转移,这表明重组蛋白保留了TRAIL以及靶向肽RGD和NGR的功能,提高了肿瘤细胞对TRAIL的敏感性。

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