芪贞汤对脂多糖诱导人结肠癌细胞上皮间充质转化的影响
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摘要
目的研究芪贞汤对脂多糖(lipopolysaccharide,LPS)诱导结肠癌细胞上皮间充质转化(epithelial-mesenchymal transition,EMT)的机制,为其发挥抗癌作用提供实验依据。方法将人结肠癌Lo Vo细胞分为4组,空白组不予干预,模型组、实验组和对照组分别予1μg/m L LPS、1μg/m L LPS+800μg/m L芪贞汤、1μg/m L LPS+100μg/m L 5-氟尿嘧啶(5-Fu)干预48小时。采用MTT实验计算芪贞汤诱导肿瘤细胞凋亡50%的浓度,即IC50 (half maximal inhibitory concentration);划痕实验观察细胞迁移能力;免疫荧光法检测NF-κB p65核转位情况; Western blot检测E-钙黏蛋白(E-cadherin,E-cad)和N-钙黏蛋白(N-cadherin,N-cad)蛋白的表达。结果芪贞汤在48小时诱导肿瘤细胞凋亡的IC50值为980. 855μg/m L。空白组、模型组、实验组和对照组划痕缩小面积分别为(46.38±5.15)(80.81±3.18)(17.78±9.87)和(16.95±3.45);与模型组相比,各组划痕缩小面积皆有极显著统计差异(P <0. 01)。空白组NF-κB p65多于细胞浆中表达;模型组可以明显看到NF-κB p65入核,核转位明显;对照组NF-κB p65在包浆和细胞核中都有表达;实验组NF-κB p65在细胞核中表达相对较少,核转移情况下降。相对于空白组,实验组E-cadherin表达量(1. 266±0.065)和对照组E-cadherin表达量(0.979±0.183)比模型组(0. 420±0. 071)显著升高,有极显著统计学差异(P <0. 01);实验组N-cadherin表达量(0. 518±0. 115)和对照组N-cadherin表达量(1. 275±0. 567)比模型组(2. 287±0. 257)显著降低,有极显著统计学差异(P <0. 01)。结论芪贞汤可通过抑制NF-κB p65活化而抑制结肠癌细胞EMT的发生,从而达到控制肿瘤细胞迁移的效果。
Objective To investigate the mechanism of Qizhen decoction on lipopolysaccharide(LPS)-induced epithelial mesenchymal transition(EMT) in colon cancer cells,and provide experimental evidence for its anti-cancer effects. Methods Human colon cancer Lo Vo cells were divided into 4 groups.The blank group was not treated. The model group,the experimental group and the control group were given 1 μg/ml LPS,1 μg/ml LPS +800 μg/m L Qizhen decoction,and 1 μg/m L LPS + 100 μg/m L 5-fluorouracil(5-Fu) intervention for 48 h. The MTT assay was used to calculate the concentration of 50% of tumor cell apoptosis induced by Qizhen decoction,which was IC50(half maximal inhibitory concentration). The cell migration ability was observed by scratch test. The nuclear translocation of NF-κB p65 was detected by immunofluorescence. Western blot was used to detect the expression of E-cadherin and N-cadherin proteins. Results The IC50 value of Qizhen decoction induced apoptosis of tumor cells at 48 h was980.855 μg/m L. The scratch reduction areas of the blank group,the model group,the experimental group and the control group were(46.38 ± 5.15),(80.81 ± 3.18),(17.78 ± 9.87) and(16.95 ± 3.45),respectively. Compared with the model group,the scratch reduction areas of each group were extremely statistically significant(P < 0.01). NF-κB p65 was more expressed than in cytoplasm in the blank group.In the model group,NF-κB p65 was observed to enter the nucleus,and nuclear translocation was obvious.NF-κB p65 was expressed both in the cytoplasm and nucleus in the control group. Compared with the blank group,the expression of E-cadherin in the experimental group( 1. 266 ± 0.065) and the control group(0.979 ± 0.183) were significantly higher than those in the model group(0. 420 ± 0.071)(P < 0.01).The expression of N-cadherin in the experimental group(0.518 ± 0.115) and the control group(1.275 ± 0.567) were significantly lower than those in the model group(2.287 ± 0.257)(P< 0.01).Conclusion Qizhen decoction can inhibit the occurrence of EMT in colon cancer cells by inhibiting the activation of NF-κB p65,thus achieving the effects of controlling tumor cell migration.
Objective To investigate the mechanism of Qizhen decoction on lipopolysaccharide(LPS)-induced epithelial mesenchymal transition(EMT) in colon cancer cells,and provide experimental evidence for its anti-cancer effects. Methods Human colon cancer Lo Vo cells were divided into 4 groups.The blank group was not treated. The model group,the experimental group and the control group were given 1 μg/ml LPS,1 μg/ml LPS +800 μg/m L Qizhen decoction,and 1 μg/m L LPS + 100 μg/m L 5-fluorouracil(5-Fu) intervention for 48 h. The MTT assay was used to calculate the concentration of 50% of tumor cell apoptosis induced by Qizhen decoction,which was IC50(half maximal inhibitory concentration). The cell migration ability was observed by scratch test. The nuclear translocation of NF-κB p65 was detected by immunofluorescence. Western blot was used to detect the expression of E-cadherin and N-cadherin proteins. Results The IC50 value of Qizhen decoction induced apoptosis of tumor cells at 48 h was980.855 μg/m L. The scratch reduction areas of the blank group,the model group,the experimental group and the control group were(46.38 ± 5.15),(80.81 ± 3.18),(17.78 ± 9.87) and(16.95 ± 3.45),respectively. Compared with the model group,the scratch reduction areas of each group were extremely statistically significant(P < 0.01). NF-κB p65 was more expressed than in cytoplasm in the blank group.In the model group,NF-κB p65 was observed to enter the nucleus,and nuclear translocation was obvious.NF-κB p65 was expressed both in the cytoplasm and nucleus in the control group. Compared with the blank group,the expression of E-cadherin in the experimental group( 1. 266 ± 0.065) and the control group(0.979 ± 0.183) were significantly higher than those in the model group(0. 420 ± 0.071)(P < 0.01).The expression of N-cadherin in the experimental group(0.518 ± 0.115) and the control group(1.275 ± 0.567) were significantly lower than those in the model group(2.287 ± 0.257)(P< 0.01).Conclusion Qizhen decoction can inhibit the occurrence of EMT in colon cancer cells by inhibiting the activation of NF-κB p65,thus achieving the effects of controlling tumor cell migration.
引文
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[12]Vicen9 R D P,Sara B,Anna M C,et al.Curcumin mediates oxaliplatin-acquired resistance reversion in colorectal cancer cell lines through modulation of CXC-Chemokine/NF-κB signaling pathway[J].Scientific Reports,2016,6(24675):24675.
[13]FENG M,FENG J,CHEN W,et al.Lipocalin-2 suppresses metastasis of colorectal cancer by attenuating NF-κB-dependent activation of snail and epithelial mesenchymal transition[J].Molecular Cancer,2016,15(1):77.
[2]ZHANG H,ZHANG H,YANG W,et al.Loss of profilin 2 contributes to enhanced epithelial-mesenchymal transition and metastasis of colorectal cancer[J].International Journal of Oncology,2018,53(3):1118-1128.
[3]刘雷蕾,崔利娜,王韶,等.中医药干预Ⅲ型上皮间质转化的研究[J].中华中医药学刊,2017,(8):2061-2065.
[4]Brandi G,Pantaleo M A,Biasco G,et al.Activated NF-kB in colorectal cancer:predictive or prognostic factor?[J].Journal of Clinical Oncology Official Journal of the American Society of Clinical Oncology,2008,26(8):1388.
[5]LIU B,DING F,HU D,et al.Human umbilical cord mesenchymal stem cell conditioned medium attenuates renal fibrosis by reducing inflammation and epithelial-to-mesenchymal transition via the TLR4/NF-κB signaling pathway in vivo and in vitro[J].Stem Cell Res Ther,2018,9(1):7.
[6]刘雷蕾,孟静岩.芪贞汤对结肠炎相关癌症小鼠肠道细菌丰度及构成的影响[J].中华中医药杂志,2018,(5):1868-1874.
[7]李胜陶,王洪新,杨娟,等.黄芪多糖对异丙肾上腺素诱导大鼠心肌肥厚中TLR4/NF-κB信号通路的影响[J].中成药,2014,36(4):674-679.
[8]WANG XH,JIA HL,DENG L,et al.Astragalus polysaccharides mediated preventive effects on bronchopulmonary dysplasia in rats[J].Pediatr Res,2014,76(4):347-354.
[9]SU D,GAO Y Q,DAI W B,et al.Helicteric acid,oleanic acid,and betulinic acid,three triterpenes from helicteres angustifolia L.Inhibit proliferation and induce apoptosis in HT-29colorectal cancer cells via suppressing NF-κB and STAT3 signaling[J].Evidence-based Complementary and Alternative Medicine,2017:5180707.
[10]TANG Q,LIU Y,LI T,et al.A novel co-drug of aspirin and ursolic acid interrupts adhesion,invasion and migration of cancer cells to vascular endothelium via regulating EMT and EGFR-mediated signaling pathways:multiple targets for cancer metastasis prevention and treatment[J].Oncotarget,2016,7(45):73114-73129.
[11]TONG L,YE Y,WU S.Therapeutic microRNAs targeting the NF-kappa B signaling circuits of cancers[J].Advanced Drug Delivery Reviews,2015,81:1-15.
[12]Vicen9 R D P,Sara B,Anna M C,et al.Curcumin mediates oxaliplatin-acquired resistance reversion in colorectal cancer cell lines through modulation of CXC-Chemokine/NF-κB signaling pathway[J].Scientific Reports,2016,6(24675):24675.
[13]FENG M,FENG J,CHEN W,et al.Lipocalin-2 suppresses metastasis of colorectal cancer by attenuating NF-κB-dependent activation of snail and epithelial mesenchymal transition[J].Molecular Cancer,2016,15(1):77.