Yang Pei-Wen, Liu Yu-Cheng, Chang Ya-Han, Lin Ching-Ching, Huang Pei-Ming, Hua Kuo-Tai, Lee Jang-Ming, Hsieh Min-Shu
Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan.
Front Oncol. 2019 Nov 6;9:1138. doi: 10.3389/fonc.2019.01138. eCollection 2019.
Esophageal squamous cell carcinoma (ESCC) is a deadly disease for which no effective targeted therapeutic agent has been approved. Both AXL and c-MET have been reported to be independent prognostic factors for ESCC. Thus, inhibitors of AXL/c-MET might have great potential as targeted therapy for ESCC. In the current study, we evaluated the therapeutic potential of the AXL/c-MET selective inhibitors, R428 and cabozantinib, in cell and mouse xenograft models. We demonstrated that both R428 and cabozantinib significantly inhibited the growth of CE81T and KYSE-70 ESCC cells and showed by wound-healing assay that they both inhibited ESCC cell migration. In the animal model, ESCC xenograft models were established by injecting KYSE-70 cells with Matrigel into the upper back region of NOD-SCID male mice followed by treatment with vehicle control, R428 (50 mg/kg/day), cisplatin (1.0 mg/kg), or cabozantinib (30 mg/kg/day) for the indicated number of days. R428 alone significantly inhibited ESCC tumor growth compared to the vehicle; however, no synergistic effect with cisplatin was observed. Notably, the dramatic efficacy of cabozantinib alone was observed in the mouse xenograft model. Collectively, our study demonstrated that both cabozantinib and R428 inhibit ESCC growth in cell and xenograft models. The results reveal the great potential of using cabozantinib for targeted therapy of ESCC.
食管鳞状细胞癌(ESCC)是一种致命疾病,目前尚无获批的有效靶向治疗药物。据报道,AXL和c-MET均为ESCC的独立预后因素。因此,AXL/c-MET抑制剂作为ESCC的靶向治疗可能具有巨大潜力。在本研究中,我们在细胞和小鼠异种移植模型中评估了AXL/c-MET选择性抑制剂R428和卡博替尼的治疗潜力。我们证明,R428和卡博替尼均能显著抑制CE81T和KYSE-70食管鳞状癌细胞的生长,并且通过伤口愈合试验表明它们都能抑制食管鳞状癌细胞的迁移。在动物模型中,通过将KYSE-70细胞与基质胶一起注射到NOD-SCID雄性小鼠的上背部区域来建立食管鳞状癌异种移植模型,随后分别用溶剂对照、R428(50 mg/kg/天)、顺铂(1.0 mg/kg)或卡博替尼(30 mg/kg/天)处理指定天数。与溶剂对照相比,单独使用R428可显著抑制食管鳞状癌肿瘤生长;然而,未观察到与顺铂的协同作用。值得注意的是,在小鼠异种移植模型中观察到了卡博替尼单独使用时的显著疗效。总体而言,我们的研究表明,卡博替尼和R428在细胞和异种移植模型中均能抑制食管鳞状癌的生长。结果揭示了使用卡博替尼进行食管鳞状癌靶向治疗的巨大潜力。