Chinese Herb Formulae Inhibit the Proliferation of Human Colon Cancer SW480 Cells by Inducing Cell Apoptosis

Objective:This study aimed to reveal the antitumor effects of Chinese herbal formulae and the underlying mechanisms in treating colorectal cancer,with a focus on developing traditional Chinese medicine(TCM)as a supplement and alternative therapeutic method for cancers.Materials and Methods:Human colon cancer SW480 cells were treated with three Chinese herbal formulae,Bu Zhong Yi Qi Decoction,Fuzi Lizhong Decoction,and Pulsatilla Decoction at different concentrations(50–600μg/mL)for 24,36,and 48 h,respectively.Cell viability was determined using the resazurin reduction assay,and cell survival rate was evaluated using a colony formation assay.After treatment with different concentrations(50–600μg/mL)of these three formulae for 48 h,the effects of the Chinese herbal formulae on cell apoptosis were investigated using Hoechst/propidium iodide(PI)staining.The positive PI-stained cells were investigated using an EnSpire multilabel plate reader and the positive Hoechst-stained cells were observed under a fluorescence microscope for morphological changes.Results:Bu Zhong Yi Qi Decoction,Fuzi Lizhong Decoction,and Pulsatilla Decoction inhibited SW480 cell proliferation in a dose-and time-dependent manner and induced cell apoptosis.Conclusion:Chinese herbal formulae with a special prescription form of TCM with antitumor effects bring a new perspective in line with the principles of TCM in cancer treatment.

Anti-proliferation effect of zoledronic acid on human colon cancer line SW480

Objective: To investigate the anti-proliferation effect and mechanism of zoledronic acid(ZOL) on human colon cancer line SW480. Methods: SW480 cells were treated with 0, 12.5, 25, 50, 100 and 200 μmo L/L of ZOL for 48 h, and CCK-8 assay was employed to obtain the survival rate of SW480 cells. SW480 cells were treated with 25 μmo L/L of ZOL for 0, 12, 24, 48 and 72 h, and then the survival rate was obtained. SW480 cells of the ZOL group were treated with 25 μmo L/L of ZOL for 48 h, while cells of the Cs A+ZOL group were pretreated with 10 μmo L/L of Cs A for 0.5 h and then treated with 25 μmo L/L of ZOL for 48 h. Then the survival rates of SW480 cells of the control group, ZOL group and Cs A+ZOL group were determined. Flow cytometry was employed to detect the apoptosis rate and the mitochondrial transmembrane potential(△ψm) of the three groups and Western blot was used to detect the expressions of cyt C in the cytosol of the three groups. Results: ZOL inhibited the proliferation of SW480 cells, and the inhibition rate positively correlated with the concentration of ZOL and the action time(P< 0.01). The cell survival rate and the △ψm of the ZOL group were greatly lower than those of the control group, while the apoptosis rate and the expression of cyt C in the cytosol were obviously higher than those of the control group. All the differences showed distinctly statistical significances(P< 0.01). The cell survival rate and the △ψm of the Cs A+ZOL group were all lower than those of the control group, but substantially higher than those of the ZOL group; while the apoptosis rate and the expression of cyt C in the cytosol were higher than those of the control group, but distinctly lower than those of the ZOL group. All the differences were statistically significant(P < 0.01). Conclusions: ZOL can induce the apoptosis in human colon cancer line SW480 and then inhibit the proliferation of SW480 cells directly by opening the mitochondrial permeability transition pore abnormally, decreasing △ψm, and releasing the cyt C into the cytosol. And the effect enhances with the increases of the concentration of ZOL and the action time.

Pro-apoptotic Effects of OSNQ on Human Colon Cancer SW480 Cells

[Objectives] The aim was to elucidate the pro-apoptosis mechanism of naphthoquinone derivative 2-octyl sulfoxide-1,4-naphthoquinone(OSNQ) on human colon cancer SW480 cells.[Methods]The cytotoxic effect of OSNQ on colon cancer SW480 cells was detected by MTT colorimetry.The pro-apoptotic effect of OSNQ on human colon cancer SW480 cells was detected by Annexin V-FITC/PI double staining.The changes in expression of apoptosis-related proteins were detected by Western blot.[Results]The results of MTT assay showed that OSNQ had a significant cytotoxic effect on colon cancer SW480 cells.The results of Western blot showed that OSNQ induced the apoptosis in colon cancer SW480 cells through promoting the expression of pro-apoptotic caspase-3 and inhibiting the expression of apoptosis-inhibiting protein Bcl-2.[Conclusions] OSNQ has a significant cytotoxic effect on colon cancer SW480 cells,and it induces the apoptosis of colon cancer SW480 cells by AKT signaling pathway.

白藜芦醇对人结肠癌SW480瘤株作用的研究

目的研究白藜芦醇对人结肠癌细胞株SW480生长和细胞周期的影响,并探讨其作用机制。方法采用光镜及电子显微镜观察用药前后细胞形态结构的改变;采用四唑盐(MTT)比色法检测细胞增殖,采用流式细胞术测定细胞周期。结果白藜芦醇呈时间和剂量依赖性抑制人结肠癌细胞株SW480的生长并诱导凋亡,IC50为80μmol/L;白藜芦醇使SW480处于S期细胞增多。结论白藜芦醇能有效的抑制人结肠癌细胞株SW480的生长并诱导其凋亡;白藜芦醇对结肠癌可能是一种有效的化学治疗和化学预防药物。

蟾蜍灵对结肠癌SW-480细胞polo-like kinase-1表达及细胞凋亡的影响

目的:观察蟾蜍灵对人结肠癌细胞系增殖的抑制作用,并探讨其作用机理。方法:采用不同浓度的蟾蜍灵作用结肠癌SW-480细胞后,采用MTT法检测细胞的恶性增殖,分别采用琼脂糖凝胶电泳和流式细胞仪检测凋亡情况,分别采用Westernblotting、Northernblotting分别检测polo-likekinase-1(PLK1)蛋白、mRNA水平。结果:蟾蜍灵能抑制结肠癌细胞的恶性增殖,且与浓度相关。蟾蜍灵能诱导结肠癌细胞凋亡,且呈浓度依赖性。流式细胞仪检测发现,蟾蜍灵将细胞阻滞在G2/M期。蟾蜍灵能下调结肠癌PLK1蛋白、mRNA水平,且呈药物浓度和作用时间依赖性。结论:蟾蜍灵有效地抑制结肠癌SW-480细胞增殖,其机制可能与其下调PLK1表达,从而诱导凋亡有关。

酪酸梭菌诱导结肠癌SW-480细胞凋亡及作用机制

目的探讨酪酸梭菌(Clostridium butyricum,CB)诱导人结肠癌SW-480细胞凋亡的作用及机制。方法采用不同浓度的酪酸梭菌(1.5×103、1.5×104、1.5×105、1.5×106、1.5×107、1.5×108CFU/mL)在不同作用时间(24、48、72、96 h)处理结肠癌SW-480细胞后,CCK8法检测CB对SW-480细胞的增殖抑制。电镜观察CB对SW-480细胞形态的影响。Annexin V-FITC/PI双标法检测细胞凋亡。Caspase试剂盒检测SW-480细胞中Caspase-3和Caspase-9的活性。Western blot法检测SW-480细胞Bax和Bcl-2凋亡蛋白表达的变化。结果酪酸梭菌对SW-480细胞的生长抑制作用呈明显的时间-剂量依赖性;菌液浓度为1.5×107CFU/mL和1.5×108CFU/mL的酪酸梭菌处理后的SW-480细胞形成典型的凋亡小体;酪酸梭菌(1.5×107CFU/mL和1.5×108CFU/mL)处理能显著增强SW-480细胞Caspase-3和Caspase-9的活性,促进SW-480细胞凋亡(P<0.01);随着菌液浓度的增加,凋亡蛋白Bax的表达增强,而抑凋亡蛋白Bcl-2的表达减弱。结论酪酸梭菌可诱导SW-480细胞凋亡,其作用机制与凋亡相关基因Bax、Bcl-2和caspase-3、caspase-9的表达有关。

茶多酚对人γδT淋巴细胞和结肠癌细胞株SW-480的影响

目的:观察茶多酚对人γδT细胞杀伤肿瘤细胞活性的影响和诱导人结肠癌细胞株(SW-480)凋亡和死亡的作用。方法:在体外用不同浓度的茶多酚诱导人γδT细胞和SW-480细胞株,然后测定人γδT细胞杀瘤活性和对肿瘤细胞的作用。用不同浓度的茶多酚分别诱导SW-480细胞4 h后,弃含有茶多酚的培养液再继续培养24 h,然后测定其死亡和凋亡数,用γδT细胞作对照组。结果:茶多酚浓度350 mg/L,作用γδT细胞4 h后能明显增强γδT细胞的杀伤肿瘤细胞活性,与未诱导组和其他浓度组相比,P<0.01;γδT细胞对经茶多酚处理后的SW-480细胞杀伤活性也明显高于对照组(P<0.01)。各种浓度的茶多酚分别与γδT和SW-480细胞作用4 h,弃诱导液再继续培养24 h后,均能诱导其死亡和凋亡,在茶多酚浓度350 mg/L、诱导时间4 h时最明显;同一浓度的茶多酚诱导SW-480细胞死亡和凋亡率明显高于γδT细胞组。结论:茶多酚在一定浓度时能明显提高γδT细胞对肿瘤的杀伤活性;经茶多酚处理的SW-480细胞更易被γδT细胞杀伤。茶多酚浓度在350 mg/L时能诱导SW-480细胞凋亡而对人γδT细胞无影响。

Embelin对大肠癌细胞株SW480细胞增殖和肿瘤坏死因子相关的凋亡诱导配体敏感性的影响

Embelin是从植物Embeliaribe中提取的具有抗肿瘤、抗炎等生物活性的化合物，可通过与x连锁凋亡抑制蛋白（Xchromosome-linked inhibitor of apoptosis protein，XIAP）蛋白BIR3功能域的结合阻止XIAP抑制caspase的活性。

龙须菜藻红蛋白亚基分离及抗肿瘤活性研究

目的研究藻红蛋白不同亚基对人直肠癌SW-480细胞的抑制作用。方法通过盐析和DEAE-Sepha-rose FF柱层析从龙须菜中获得高纯度藻红蛋白,然后通过脲变性、CM-Sepharose F F阳离子交换层析与透析复性,获得具活性的PE亚基,采用MTT法检测藻红蛋白亚基对SW-480细胞的生长抑制作用,流式细胞仪检测藻红蛋白亚基对SW-480细胞凋亡的影响。结果 PE亚基对SW-480有较强的生长抑制作用,其中以β亚基最为显著,当β亚基剂量为20μg/mL,作用时间48 h时,其对SW-480细胞的抑制率达72.64%。结论藻红蛋白及其亚基对SW-480细胞株的生长具有较强的抑制作用,β亚基效果最好,预示其具有一定的抗肿瘤潜力。

皂角刺含药血清诱导直肠癌细胞SW-480凋亡及其对Bcl-2/Bax mRNA表达的影响

目的:采用血清药理学方法探讨皂角刺含药血清诱导肠癌细胞凋亡的作用机制。方法:制备皂角刺药液,50只健康SD大鼠分为皂角刺高中低剂量组(每1 mL分别含有生药2 000,1 000,500 mg),环磷酰胺阳性对照组(50 mg·kg-1)和生理盐水空白对照组5个组,按20 mL·kg-1大鼠体质量给药,以制备含药血清。取含药血清培养液在体外作用于SW-480细胞(密度为1×106/mL),分别在24,48,72 h后,采用MTT法检测含药血清对SW-480增殖的影响;加入药物血清培养液处理细胞24 h后,采用流式细胞仪检测SW-480凋亡率,RT-PCR检测各组含药血清对细胞B细胞淋巴瘤/白血病2(Bcl-2)/Bel-2相关x蛋白(Bax)基因表达的影响。结果:与空白对照组比较,皂角刺含药血清培养液作用细胞的吸光度(A)在20,40,60 h均明显低于空白组(0.370±0.005)%,(0.624±008)%,(1.078±0.038)%(P<0.01);皂角刺高、中、低剂量含药血清培养液诱导SW-480凋亡依次为(37.386±0.163)%,(35.834±0.092 3)%,(27.572±1.193)%显著高于空白对照(5.036±0.378)%(P<0.01);皂角刺含药血清培养液对SW-480细胞的Bcl-2表达(0.258±0.037,0.442±0.024和0.652±0.072)明显低于空白对照组(0.936±0.047)(P<0.01),随灌胃给药的药物剂量增加Bcl-2表达而增加,而Bax表达(1.946±0.017,1.810±0.023和1.810±0.023)明显高于空白对照组(1.260±0.029)(P<0.01),Bax表达反而减少。结论:皂角刺含药血清对能抑制SW-480生长和诱导其凋亡,Bcl-2 mRNA基因表达减少与Bax mRNA基因表达增多可能是皂角刺诱导肠癌细胞凋亡的机制之一。