目的探讨环状RNA(circ)_0003028对人肝癌细胞增殖、迁移和侵袭的影响及分子机制。方法人肝癌细胞系Huh7分为小干扰RNA(si)-NC组、si-circ_0003028组、微小RNA(miR)-NC组、miR-498模似物(mimics)组、si-circ_0003028+anti-miR-NC组、si-c...目的探讨环状RNA(circ)_0003028对人肝癌细胞增殖、迁移和侵袭的影响及分子机制。方法人肝癌细胞系Huh7分为小干扰RNA(si)-NC组、si-circ_0003028组、微小RNA(miR)-NC组、miR-498模似物(mimics)组、si-circ_0003028+anti-miR-NC组、si-circ_0003028+anti-miR-498组;Real-time PCR检测肝癌组织及各组细胞中circ_0003028和miR-498表达水平;MTT检测细胞增殖;Transwell检测细胞迁移和侵袭数;Western blotting检测蛋白表达;双荧光素酶报告实验检测circ_0003028和miR-498的靶向调控关系。结果肝癌组织中circ_0003028表达水平升高(0.98±0.02 vs 1.36±0.01),miR-498表达水平降低(0.98±0.02 vs 0.63±0.02)(P<0.05)。抑制circ_0003028表达或miR-498过表达后,Huh7细胞中Ki-67(0.85±0.02 vs 0.41±0.02或0.95±0.11 vs 0.37±0.02)、基质金属蛋白酶(MMP)-2(0.71±0.02 vs 0.43±0.03或0.83±0.02 vs 0.41±0.03)、MMP-9(0.74±0.02 vs 0.37±0.02或0.78±0.02 vs 0.39±0.02)蛋白表达水平降低,细胞活性(1.53±0.03 vs 1.05±0.02或1.68±0.02 vs 1.11±0.02)降低;迁移(111.40±2.12 vs 77.22±2.38或108.90±2.30 vs 78.44±1.46)和侵袭(87.89±2.18 vs 49.78±1.98或80.22±1.79 vs 38.22±1.52)细胞数减少,生殖器形成抑制基因-1(SMG-1)(0.76±0.02 vs 1.39±0.02或0.79±0.02 vs 1.39±0.02)、p53(0.77±0.02 vs 1.24±0.03或0.82±0.03 vs 1.45±0.03)、p53-ser15(0.78±0.03 vs 1.50±0.02或0.82±0.02 vs 1.49±0.04)蛋白表达水平升高(P<0.05)。Circ_0003028靶向调控miR-498,沉默miR-498逆转了抑制circ_0003028表达对Huh7细胞增殖、迁移和侵袭的影响。结论抑制circ_0003028表达通过靶向miR-498影响SMG-1/p53信号通路而抑制人肝癌细胞增殖、迁移和侵袭。展开更多
AIM： To investigate in vitro effects and mechanisms of silibinin on hepatocellular carcinoma （HCC） cell growth, METHODS： Human HCC cell lines were treated with different doses of silibinin. The effects of silibini...AIM： To investigate in vitro effects and mechanisms of silibinin on hepatocellular carcinoma （HCC） cell growth, METHODS： Human HCC cell lines were treated with different doses of silibinin. The effects of silibinin on HCC cell growth and proliferation, apoptosis, cell cycle progression, histone acetylation, and other related signal transductions were systematically examined. RESULTS： We demonstrated that silibinin significantly reduced the growth of HUH7, HepG2, Hep3B, and PLC/PRF/5 human hepatoma cells. Silibinin-reduced HuH7 cell growth was associated with significantly up- regulated p21/CDK4 and p27/CDK4 complexes, down- regulated Rb-phosphorylation and E2F1/DP1 complex. Silibinin promoted apoptosis of HuH7 cells that was associated with down-regulated survivin and upregulated activated caspase-3 and -9. Silibinin＇s antiangiogenic effects were indicated by down-regulated metalloproteinase-2 （MMP2） and CD34. We found that silibinin-reduced growth of HuH7 cells was associated with increased activity of phosphatase and tensin homolog deleted on chromosome ten （PTEN） and decreased p-Akt production, indicating the role of PTEN/ PI3K/Akt pathway in silibinin-mediated anti-HCC effects. We also demonstrated that silibinin increased acetylation of histone H3 and H4 （AC-H3 and AC-H4）, indicating a possible role of altered histone acetylation in silibininreduced HCC cell proliferation. CONCLUSION： Our results defined silibinin＇s in vitro anti-HCC effects and possible mechanisms, and provided a rationale to further test silibinin for HCC chemoprevention.展开更多
文摘目的探讨环状RNA(circ)_0003028对人肝癌细胞增殖、迁移和侵袭的影响及分子机制。方法人肝癌细胞系Huh7分为小干扰RNA(si)-NC组、si-circ_0003028组、微小RNA(miR)-NC组、miR-498模似物(mimics)组、si-circ_0003028+anti-miR-NC组、si-circ_0003028+anti-miR-498组;Real-time PCR检测肝癌组织及各组细胞中circ_0003028和miR-498表达水平;MTT检测细胞增殖;Transwell检测细胞迁移和侵袭数;Western blotting检测蛋白表达;双荧光素酶报告实验检测circ_0003028和miR-498的靶向调控关系。结果肝癌组织中circ_0003028表达水平升高(0.98±0.02 vs 1.36±0.01),miR-498表达水平降低(0.98±0.02 vs 0.63±0.02)(P<0.05)。抑制circ_0003028表达或miR-498过表达后,Huh7细胞中Ki-67(0.85±0.02 vs 0.41±0.02或0.95±0.11 vs 0.37±0.02)、基质金属蛋白酶(MMP)-2(0.71±0.02 vs 0.43±0.03或0.83±0.02 vs 0.41±0.03)、MMP-9(0.74±0.02 vs 0.37±0.02或0.78±0.02 vs 0.39±0.02)蛋白表达水平降低,细胞活性(1.53±0.03 vs 1.05±0.02或1.68±0.02 vs 1.11±0.02)降低;迁移(111.40±2.12 vs 77.22±2.38或108.90±2.30 vs 78.44±1.46)和侵袭(87.89±2.18 vs 49.78±1.98或80.22±1.79 vs 38.22±1.52)细胞数减少,生殖器形成抑制基因-1(SMG-1)(0.76±0.02 vs 1.39±0.02或0.79±0.02 vs 1.39±0.02)、p53(0.77±0.02 vs 1.24±0.03或0.82±0.03 vs 1.45±0.03)、p53-ser15(0.78±0.03 vs 1.50±0.02或0.82±0.02 vs 1.49±0.04)蛋白表达水平升高(P<0.05)。Circ_0003028靶向调控miR-498,沉默miR-498逆转了抑制circ_0003028表达对Huh7细胞增殖、迁移和侵袭的影响。结论抑制circ_0003028表达通过靶向miR-498影响SMG-1/p53信号通路而抑制人肝癌细胞增殖、迁移和侵袭。
基金Supported by UCI institutional research grants from GI Division Chao Family Comprehensive Cancer Center(K.-Q.H.)
文摘AIM： To investigate in vitro effects and mechanisms of silibinin on hepatocellular carcinoma （HCC） cell growth, METHODS： Human HCC cell lines were treated with different doses of silibinin. The effects of silibinin on HCC cell growth and proliferation, apoptosis, cell cycle progression, histone acetylation, and other related signal transductions were systematically examined. RESULTS： We demonstrated that silibinin significantly reduced the growth of HUH7, HepG2, Hep3B, and PLC/PRF/5 human hepatoma cells. Silibinin-reduced HuH7 cell growth was associated with significantly up- regulated p21/CDK4 and p27/CDK4 complexes, down- regulated Rb-phosphorylation and E2F1/DP1 complex. Silibinin promoted apoptosis of HuH7 cells that was associated with down-regulated survivin and upregulated activated caspase-3 and -9. Silibinin＇s antiangiogenic effects were indicated by down-regulated metalloproteinase-2 （MMP2） and CD34. We found that silibinin-reduced growth of HuH7 cells was associated with increased activity of phosphatase and tensin homolog deleted on chromosome ten （PTEN） and decreased p-Akt production, indicating the role of PTEN/ PI3K/Akt pathway in silibinin-mediated anti-HCC effects. We also demonstrated that silibinin increased acetylation of histone H3 and H4 （AC-H3 and AC-H4）, indicating a possible role of altered histone acetylation in silibininreduced HCC cell proliferation. CONCLUSION： Our results defined silibinin＇s in vitro anti-HCC effects and possible mechanisms, and provided a rationale to further test silibinin for HCC chemoprevention.
