目的：从8个LY系列肝细胞生长因子受体（c-Met）酪氨酸激酶抑制剂中筛选具有抗肿瘤活性的化合物，并进一步评价其体内外抗肿瘤作用。方法首先采用均相时间分辨荧光技术（HTRF）对LY系列化合物进行初步筛选，观察它们对c-Met酪氨酸激酶的抑制作用；采用CCK-8法观察筛选出的活性化合物在体外对人胃癌MKN-45、人神经胶质瘤U87MG、人肾癌Caki-1、人前列腺癌PC-3细胞株的增殖抑制作用。建立人恶性胶质母细胞瘤U87MG裸小鼠移植瘤模型，考察活性化合物的抑瘤效果。结果 HTRF结果显示有4个活性较好的化合物（LY22、LY25、LY28、LY32），其中LY28对c-Met抑制作用优于阳性对照药克唑替尼（Crizotinib）。CCK-8结果显示这些活性化合物对选用的4种靶细胞均有不同程度的抑制作用，其中LY28对肿瘤细胞增殖抑制作用最明显。裸小鼠移植瘤实验显示，LY28可显著抑制U87MG裸小鼠移植瘤的增殖，40 mg/kg LY28抑瘤率达到78.13%。结论化合物LY28具有较好的抗肿瘤活性，具有进一步研发的价值。%Objective To screen 8 series of LY compounds, c-Met tyrosine kinase inhibitors, and evaluate their anti-tumor effects in vitro and in vivo. Methods Preliminary screening was carried out by detecting the c-Met kinase phosphor⁃ylation inhibition activity of the compounds. CCK-8 assay was adopted for secondary anti-tumor screen of the selected com⁃pounds using MKN-45, U87MG, Caki-1 and PC-3 cell lines in vitro. The transplanted tumor model of U87MG cells in nude mice was established to evaluate the antitumor activity in vivo. Results Four compounds (LY22, LY25, LY28 and LY32) with better activities were selected by HTRF method, in which LY28 had better inhibitory effect on c-Met than that of Crizo⁃tinib. The above active compounds showed different degrees of inhibition on the four kinds of target cells (MKN-45, U87MG, Caki-1 and PC-3) detected by CCK-8 method, and the inhibitory effect of LY28 showed the most obvious. Antitumor activi⁃ty in vivo showed that LY28 can significantly inhibited tumor growth in a dose-dependent manner. The tumor inhibitory rate in high-dose of LY28 was 78.13%. Conclusion The compound LY28 has good antitumor activity in vitro and in vivo, which will be a new tyrosine kinase inhibitor.
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