Choi Yun Jung, Kim Ji Hye, Rho Jin Kyung, Kim Joong Sun, Choi Chang-Min, Kim Woo Sung, Son Jaekyoung, Lee Jae Cheol
Asan Institute for Life Sciences, Asan Medical Center, College of Medicine, University of Ulsan, Seoul 138-736, Republic of Korea.
Department of Biomedical Sciences, College of Medicine, University of Ulsan, Seoul 138-736, Republic of Korea.
Oncol Rep. 2017 Apr;37(4):2201-2208. doi: 10.3892/or.2017.5482. Epub 2017 Mar 1.
The AXL and MET receptors regulate key processes in tumor growth, metastasis, and drug resistance; thus, they have recently been implicated as promising therapeutic targets in various tumors. We investigated the metastatic potential and crosstalk between these receptors in non‑small cell lung cancer (NSCLC). We found that the treatment of NSCLC cells with hepatocyte growth factor (HGF) and growth arrest-specific 6 (Gas6), as ligands for MET and AXL, respectively, promoted their migration and invasion ability. However, treatment with inhibitors of each of these receptors significantly reduced the migratory and invasiveness of the cells, although their inhibitory rates varied according to the inhibition of each receptor. In addition, the suppression of each receptor by shRNA resulted in reduced migration and invasiveness. Notably, the suppression of AXL was more effective than the suppression of MET in the inhibition of migration and invasion. In accordance with in vitro results, when the cells were transferred via tail vein injection, AXL inhibition was more efficient in attenuating metastasis than MET inhibition. Clinically, AXL or MET expression is associated with a poor prognosis in primary tumors of NSCLC. In summary, AXL and MET can regulate tumor metastasis, but AXL was shown to be more potent than MET in lung metastasis. Thus, we conclude that AXL might be a suitable therapeutic target for the inhibition of lung metastasis.
AXL和MET受体调节肿瘤生长、转移和耐药性中的关键过程;因此,它们最近被认为是各种肿瘤中有前景的治疗靶点。我们研究了非小细胞肺癌(NSCLC)中这些受体之间的转移潜能和相互作用。我们发现,分别用肝细胞生长因子(HGF)和生长停滞特异性蛋白6(Gas6)处理NSCLC细胞,作为MET和AXL的配体,可促进其迁移和侵袭能力。然而,用这些受体的抑制剂处理可显著降低细胞的迁移和侵袭能力,尽管它们的抑制率因对每个受体的抑制作用而异。此外,用shRNA抑制每个受体可导致迁移和侵袭能力降低。值得注意的是,在抑制迁移和侵袭方面,抑制AXL比抑制MET更有效。与体外结果一致,当通过尾静脉注射转移细胞时,抑制AXL在减轻转移方面比抑制MET更有效。临床上,AXL或MET表达与NSCLC原发性肿瘤的预后不良相关。总之,AXL和MET可调节肿瘤转移,但在肺转移中AXL比MET更具作用。因此,我们得出结论,AXL可能是抑制肺转移的合适治疗靶点。
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