山柰酚通过Wnt/β-catenin信号通路抑制HBx-HepG2细胞增殖、侵袭及迁移

目的:探讨山柰酚对HBx-HepG2细胞增殖、侵袭及迁移的影响,并研究其潜在分子作用机制。方法:利用实时荧光定量PCR检测相关基因的表达水平,利用蛋白印迹实验检测相关蛋白的水平,流式细胞术检测细胞的凋亡率,MTT实验和平板集落形成实验检测细胞的增殖,Transwell侵袭实验和划痕愈合实验检测细胞的侵袭和转移。结果:山柰酚(10~200μmol/L)能够剂量和时间依赖性地抑制HBx-HepG2细胞的增殖。山柰酚(100μmol/L)能显著抑制HBx-HepG2细胞的集落形成数量、细胞侵袭能力以及细胞愈合率,诱导HBx-HepG2细胞凋亡,引起cleaved caspase-3、cleaved caspase-9及Bax蛋白水平上升,Bcl-2蛋白水平下降,降低β-catenin、c-Myc和cyclin D1 mRNA及蛋白的表达水平。山柰酚(100μmol/L)同时能够降低p-GSK-3β蛋白水平以及细胞质和细胞核中的β-catenin蛋白水平,对GSK-3β蛋白水平没有影响。Li Cl处理能够反转山柰酚(100μmol/L)对HBx-HepG2细胞的增殖、侵袭以及迁移抑制作用。结论:山柰酚对HBx-HepG2细胞的增殖、侵袭及转移有显著的抑制作用,这种抑制作用很有可能是通过抑制Wnt/β-catenin信号通路的活性来实现的。

Kaempferol inhibits cell proliferation,invasion and migration via Wnt/β-catenin signaling in HBx-HepG2 cells

AIM: To explore the effects of kaempferol on the proliferation, invasion and migration abilities of HBx-HepG2 cells and to examine the underlying molecular mechanisms. METHODS: The expression levels of related genes at mRNA and protein levels were determined by RT-qPCR and Western blot. The cell apoptotic rate was analyzed by flow cytometry. The cell proliferation, growth, invasion and migration abilities were measured by MTT assay, colony formation assay, Transwell invasion assay and wound healing assay, respectively. RESULTS: Kaemferol inhibited HBx-HepG2 cell proliferation in a concentration-and time-dependent manner. Kaempferol at 100 μmol/L significantly inhibited the colony formation, invasion and migration abilities of the HBx-HepG2 cells. Kaemferol at 100 μmol/L also increased cell apoptotic rate, increased the protein levels of cleaved caspase-3, cleaved caspase-9 and Bax, and decreased the expression level of Bcl-2. In addition, kaemferol at 100 μmol/L suppressed the mRNA and protein expression levels of β-catenin, c-Myc and cyclin D1 in the HBx-HepG2 cells. Kaemferol at 100 μmol/L also suppressed the protein level of p-GSK-3β and the β-catenin protein levels in both cytoplasm and nucleus. LiCl treatment reversed the inhibitory effect of kaempferol on the growth, invasion and migration of the HBx-HepG2 cells. CONCLUSION: Kaempferol inhibits cell proliferation, invasion and migration via activating Wnt/β-catenin signaling in HBx-HepG2 cells.