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Title: [AMG-102 inhibits proliferation and induces apoptosis of laryngeal squamous cell carcinoma cells by regulating c-Met/PI3K/Akt pathway].
Author: Cao F, Lyu X, Dong KF, Fan C, Zhang JJ, Chen K, Zhang Y, Ma BJ, Hou CL, Zhang CH.
Journal: Zhonghua Zhong Liu Za Zhi; 2020 Feb 23; 42(2):99-104. PubMed ID: 32135642.
Abstract:
Objective: To investigate the effects of c-Met inhibitor AMG-102 on the proliferation and apoptosis of laryngeal squamous carcinoma Hep-2 cells and the underlying mechanism. Methods: Laryngeal squamous carcinoma cell line Hep-2 cells were treated with 2.5, 5 and 10 μmol/L AMG-102, respectively. The proliferation activities of Hep-2 cells were detected by 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2H-tetrazolium bromide (MTT). The apoptotic rate of Hep-2 cells was detected by flow cytometry analysis and Hoechst staining. The mRNA expression levels of apoptosis-related genes were detected by real-time quantitative polymerase Chain reaction (RT-qPCR), and the protein expressions of c-Met/PI3K/AKT pathway were detected by western blot. Results: Compared with the control group, the proliferation rates of Hep-2 cells treated with 2.5, 5 and 10 μmol/L AMG-102 for 24 hours were (89.8±1.1)%, (79.8±1.0)% and (69.1±1.2)%, respectively; for 48 hours were (76.8±2.0)%, (60.2±1.1)% and (49.8±1.2)%, respectively; for 72 hours were (50.1±2.0)%, (41.5±1.1)% and (33.6±1.0), respectively, with significant differences (all P<0.05). The apoptotic rates of Hep-2 cells treated with 2.5, 5 and 10 μmol/L AMG-102 for 48 hours were (16.09±1.53)%, (27.51±2.02)% and (36.57±1.42)%, respectively, which were significantly higher than (3.62±0.10) % in the control group (all P<0.05). After treated with 2.5, 5 and 10 μmol/L AMG-102 for 48 hours, the relative expression levels of Bcl-2 mRNA in Hep-2 cells were 0.58±0.13, 0.38±0.12 and 0.20±0.13, respectively; the relative protein expression of p-Met were 80.0±3.8, 50.6±4.2 and 28.5±1.3, respectively; the relative protein expression of p-PI3K were 87.1±0.9, 54.2±1.2 and 21.0±1.2, respectively; the relative protein expression of p-AKT were 98.7±5.6, 56.9±3.2 and 32.2±4.3, respectively; which were significantly lower than those in the control group (all P<0.05). The relative expression levels of Bax mRNA were 1.78±0.13, 2.37±0.14 and 3.05±0.13, respectively, and the relative expression levels of caspase-3 mRNA were 1.98±0.14, 2.47±0.14 and 3.15±0.13, respectively, which were significantly higher than those in the control group (all P<0.05). Conclusion: c-Met inhibitor AMG-102 could inhibit the proliferation and induce apoptosis of laryngeal squamous carcinoma Hep-2 cells by regulating the c-Met/PI3K/Akt pathway. 目的： 探讨c-Met抑制剂AMG-102对喉鳞癌Hep-2细胞增殖和凋亡的影响及潜在机制。 方法： 分别以2.5、5和10 μmol/L的AMG-102处理喉鳞癌Hep-2细胞，采用四甲基偶氮唑蓝(MTT)法检测AMG-102对Hep-2细胞的增殖抑制作用，流式细胞术和Hoechst染色法检测细胞凋亡情况。实时荧光定量聚合酶链反应(RT-qPCR)检测凋亡相关基因的mRNA表达，Western blot检测c-Met/PI3K/Akt通路相关蛋白的表达。 结果： 与对照组比较，2.5、5、10 μmol/L AMG-102处理Hep-2细胞24 h的增殖率分别为(89.8±1.1)%、(79.8±1.0)%和(69.1±1.2)%，处理48 h的增殖率分别为(76.8±2.0)%、(60.2±1.1)%和(49.8±1.2)%，处理72 h的增殖率分别为(50.1±2.0)%、(41.5±1.1)%和(33.6±1.0)%，差异均有统计学意义(均P<0.05)。2.5、5、10 μmol/L AMG-102处理Hep-2细胞48 h的凋亡率分别为(16.09±1.53)%、(27.51±2.02)%和(36.57±1.42)%，明显高于对照组[(3.62±0.10)%]，差异均有统计学意义(均P< 0.05)。2.5、5、10 μmol/L AMG-102处理48 h，Hep-2细胞Bcl-2 mRNA的相对表达量分别为0.58±0.13、0.38±0.12和0.20±0.13，p-Met蛋白的相对表达量分别为80.0±3.8、50.6±4.2和28.5±1.3，p-PI3K蛋白的相对表达量分别为87.1±0.9、54.2±1.2和21.0±1.2，p-AKT蛋白的相对表达量分别为98.7±5.6、56.9±3.2和32.2±4.3，均明显低于对照组(均P<0.05)；Bax mRNA的相对表达量分别为1.78±0.13、2.37±0.14和3.05±0.13，caspase-3 mRNA的相对表达量分别为1.98±0.14、2.47±0.14和3.15±0.13，均明显高于对照组(均P<0.05)。 结论： c-Met抑制剂AMG-102通过调控c-Met/PI3K/Akt通路，可以抑制喉鳞癌Hep-2细胞增殖，诱导其凋亡。.

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