目的：探讨土木香内酯（alantolactone，ALT）对人骨肉瘤143B细胞增殖、迁移、侵袭和凋亡的影响及其作用机制。方法：用不同浓度（0、4、6、8、10 μmol/L）的ALT处理人骨肉瘤143B细胞后，用结晶紫染色法和MTT实验检测细胞的增殖能力，用划痕愈合实验、Transwell 小室法、Hoechst33258 染色法分别检测细胞的迁移、侵袭和凋亡水平，用qPCR及Western blotting（WB）分别检测细胞中E-cadherin 和N-cadherin、caspase-3、cleaved-caspase-3（c-caspase-3）、PARP和cleaved-PARP（c-PARP）mRNA和蛋白表达水平。用荧光素酶报告基因实验检测T细胞淋巴因子或淋巴增强因子（T cell lymphocyte factor/lymphoid enhancer factor,TCF/LEF）转录活性，qPCR及WB检测β-catenin 及MMP-7、c-Myc mRNA和蛋白表达水平。结果：ALT能够抑制骨肉瘤143B 细胞的增殖、迁移和侵袭，同时促进细胞凋亡（P<0.05 或P<0.01）。经8、10 μmol/L ALT处理后，143B细胞中PARP mRNA和蛋白水平显著上调，c-caspase-3 和c-PARP 蛋白水平表达增加（均P<0.05）；E-cadherin mRNA 和蛋白水平表达上调、N-cadherin mRNA 和蛋白表达水平下调，同时TCF/LEF 转录活性明显下降（P<0.05 或P<0.01），β-catenin、MMP-7 和c-Myc mRNA和蛋白表达水平显著下调（P<0.05 或P<0.01）。结论：ALT通过抑制Wnt/β-catenin 信号通路的活性从而抑制人骨肉瘤143B细胞增殖、迁移和侵袭，并促进其凋亡。

Objective: To investigate the effect of alantolactone (ALT) on proliferation, migration, invasion and apoptosis of human osteosarcoma 143B cells and the underlying mechanism. Methods: Osteosarcoma 143B cells were treated with different concentrations of ALT (0, 4, 6, 8, 10 μmol/L). Then, the cell proliferation ability was detected by crystal violet staining and MTT assay, cell migration was determined by Wound-healing test, cell invasion was analyzed by Transwell assay and cell apoptosis rate was detected by Hoechst33258 staining. The mRNA and protein expressions of E-cadherin, N-cadherin, caspase-3, cleaved caspase-3 (c-caspase-3),poly ADP-ribose polymerase (PARP) and cleaved PARP (c-PARP) in 143B cells were detected by qPCR and Western blotting (WB),respectively. TCF/LEF (T cell lymphocyte factor/lymphoid enhancer factor) transcriptional activity was examined with Luciferase reporter gene assay. The mRNA and protein expressions of β -catenin as well as MMP-7 and c-Myc were detected by qPCR and WB,respectively. Results: ALT inhibited proliferation, migration and invasion of osteosarcoma 143B cells and promoted apoptosis (P<0.05 or P<0.01). After the treatment with ALT at 8, 10 μmol/L, the mRNA and protein expressions of E-cadherin and PARP, as well as the protein expressions of c-caspase-3 and c-PARP were up-regulated, while the mRNA and protein expressions of N-cadherin were downregulated (P<0.05 or P<0.01); At the same time, the TCF/LEF transcriptional activity and the mRNAand protein expressions of β-catenin,MMP-7 and c-Myc were significantly down-regulated (P<0.05 or P<0.01). Conclusion: ALT may inhibit the proliferation, migration and invasion and promote cell apoptosis possibly through suppressing Wnt/β-catenin signaling pathway in osteosarcoma 143B cells.

重庆市科技计划资助项目（No. cstc2017jcyjAX0039 ）