AIM: To observe the effect of Chinese traditional herbal decoction Weikang-ning (WKN) on cell growth and expression of VEGF and its receptors KDR and Flt-1 in gastric cancer cell line MGC-803. METHODS: A total of 120 ...AIM: To observe the effect of Chinese traditional herbal decoction Weikang-ning (WKN) on cell growth and expression of VEGF and its receptors KDR and Flt-1 in gastric cancer cell line MGC-803. METHODS: A total of 120 male Wistar rats were divided into control group, high dose, medium dose and low dose groups fed with natural saline, 20, 10, and 5 g/kg of WKN, respectively. The experimental animals were finally killed for the preparation of drug-containing serum. The gastric cancer cell MGC-803 was cultured with the drug-containing serum drawn from the rats in different groups. We observed the growth condition of the cancer cells with light microscope and flow cytometer. The expression of mRNA of VEGF and its receptors KDR and Flt-1 was detected with RT-PCR. RESULTS: The proportion of cells in G0-G1 phase was (65.40±0.41)%, (56.92±0.62)%, (55.89±0.69)% in high, medium and low dose groups respectively vs(41.35±0.55)% in control group (P<0.01), while the cells in G2-S and S phases were (11.62±0.62)% and (22.99±0.69)%, (17.08±0.80)% and (26.00±0.71)%, (19.37±0.57)% and (24.74±0.64)% in high, medium and low dose groups, respectively, vs(23.65±0.56)% and (35.00±0.60)% in control group (P<0.01). The expression of mRNA of VEGF and its receptors was significantly decreased, the area of electrophoresis bands (AREA), the absorptivity of mean optical density (A) and the product of AREA and A were significantly lower in WKN-administered groups than that in control group(P<0.01). CONCLUSION: The decoction of WKN suppresses the growth of gastric cancer cell MGC-803 and decreases the expression of mRNA of both VEGF and its receptors KDR and Flt-1.展开更多
[目的]观察芪竹方对人胃腺癌MGC-803细胞Caspase-3及端粒酶增殖与凋亡的影响,探讨中药复方在抗肿瘤治疗中的作用机制。[方法]选用芪竹方500μg/ml在4、8、12、16 h 4个不同时间点及125、250、500μg/ml3个不同浓度在24 h作用人胃腺癌细...[目的]观察芪竹方对人胃腺癌MGC-803细胞Caspase-3及端粒酶增殖与凋亡的影响,探讨中药复方在抗肿瘤治疗中的作用机制。[方法]选用芪竹方500μg/ml在4、8、12、16 h 4个不同时间点及125、250、500μg/ml3个不同浓度在24 h作用人胃腺癌细胞MGC-803,分别采用Caspase-3分光光度法及TRAP银染法端粒酶活性检测法检测Caspase-3和端粒酶在人胃腺癌细胞MGC-803中的表达。[结果]芪竹方500μg/ml在16 h时可明显提高人胃腺癌细胞MGC-803中Caspase-3的活化程度,在250、500μg/ml作用24 h时可明显降低人胃腺癌细胞MGC-803端粒酶的活性。[结论]芪竹方可能通过介导人胃腺癌MGC-803细胞中Caspase-3的增殖及诱导端粒酶凋亡等多途径多靶点而发挥作用。展开更多
Malabaricone C (1), isolated from the seeds ofMyristicafragrans Houtt., belongs to a kind of diarylnonanoid compounds that are only found in Myristicaceae till now. In this study, biotransformation of 1 was investig...Malabaricone C (1), isolated from the seeds ofMyristicafragrans Houtt., belongs to a kind of diarylnonanoid compounds that are only found in Myristicaceae till now. In this study, biotransformation of 1 was investigated using rat hepatic microsomes for the first time and the main biotransformation product was elucidated as malabaricone B (2) according to the spectroscopic data. Further evaluation on human gastric cancer cell lines showed that the cytotoxic effects of malabaricone C and its metabolite malabaricone B were comparable to those of vinorelbine, with the values of IC50 of (42.62±3.10) and (19.80±1.70) μg/mL on NCI-N87, and (22.94±1.33) and (19.60±2.21) μg/mL on MGC803, respectively. Statistical analysis revealed that malabaricone B had significantly stronger cytotoxicity than the parent compound (P〈0.01 on NCI-N87 and P〈0.05 on MGC803), which may indicate a bioactivation of malabaricone C by hepatic microsomes. These results suggest that malabaricone C has a simple biotransformation pathway by hepatic microsomes and provide valuable information for further investigation on both the parent compound and its biotransformation product as anti-gastric cancer agents or lead compounds.展开更多
目的建立稳定过表达N-cadherin的人类胃癌MGC-803细胞系。方法从含有N-cadherin的质粒中利用PCR技术克隆N-cadherin基因编码序列。制备并浓缩慢病毒颗粒,将构建好的过表达N-cadherin慢病毒载体感染MGC-803细胞,并稳定遗传,嘌呤霉素筛选...目的建立稳定过表达N-cadherin的人类胃癌MGC-803细胞系。方法从含有N-cadherin的质粒中利用PCR技术克隆N-cadherin基因编码序列。制备并浓缩慢病毒颗粒,将构建好的过表达N-cadherin慢病毒载体感染MGC-803细胞,并稳定遗传,嘌呤霉素筛选的阳性克隆传代培养5代后鉴定细胞内N-cadherin的表达。结果荧光显微镜下过表达N-cadherin组细胞有绿色荧光表达;PCR扩增得到含N-cadherin基因编码序列的特异性条带;重组的过表达N-cadherin载体中,过表达N-cadherin编码序列与目标序列几乎一致;Western blotting结果显示,在分子量为98 k D处有相应条带。结论成功建立稳定过表达N-cadherin的人类胃癌MGC-803细胞,此研究为进一步探讨N-cadherin基因的功能提供了良好的研究基础。展开更多
基金Supported by the Scientific Commission of Guangdong Province,No. C30306Administration of Traditional Chinese Medicine of Guangdong Province, No.100109
文摘AIM: To observe the effect of Chinese traditional herbal decoction Weikang-ning (WKN) on cell growth and expression of VEGF and its receptors KDR and Flt-1 in gastric cancer cell line MGC-803. METHODS: A total of 120 male Wistar rats were divided into control group, high dose, medium dose and low dose groups fed with natural saline, 20, 10, and 5 g/kg of WKN, respectively. The experimental animals were finally killed for the preparation of drug-containing serum. The gastric cancer cell MGC-803 was cultured with the drug-containing serum drawn from the rats in different groups. We observed the growth condition of the cancer cells with light microscope and flow cytometer. The expression of mRNA of VEGF and its receptors KDR and Flt-1 was detected with RT-PCR. RESULTS: The proportion of cells in G0-G1 phase was (65.40±0.41)%, (56.92±0.62)%, (55.89±0.69)% in high, medium and low dose groups respectively vs(41.35±0.55)% in control group (P<0.01), while the cells in G2-S and S phases were (11.62±0.62)% and (22.99±0.69)%, (17.08±0.80)% and (26.00±0.71)%, (19.37±0.57)% and (24.74±0.64)% in high, medium and low dose groups, respectively, vs(23.65±0.56)% and (35.00±0.60)% in control group (P<0.01). The expression of mRNA of VEGF and its receptors was significantly decreased, the area of electrophoresis bands (AREA), the absorptivity of mean optical density (A) and the product of AREA and A were significantly lower in WKN-administered groups than that in control group(P<0.01). CONCLUSION: The decoction of WKN suppresses the growth of gastric cancer cell MGC-803 and decreases the expression of mRNA of both VEGF and its receptors KDR and Flt-1.
基金National Natural Science Foundation of China(Grant No.30973863.81161120429)National Key Technology R&D Program of China(Grant No.2011BAI07B08)
文摘Malabaricone C (1), isolated from the seeds ofMyristicafragrans Houtt., belongs to a kind of diarylnonanoid compounds that are only found in Myristicaceae till now. In this study, biotransformation of 1 was investigated using rat hepatic microsomes for the first time and the main biotransformation product was elucidated as malabaricone B (2) according to the spectroscopic data. Further evaluation on human gastric cancer cell lines showed that the cytotoxic effects of malabaricone C and its metabolite malabaricone B were comparable to those of vinorelbine, with the values of IC50 of (42.62±3.10) and (19.80±1.70) μg/mL on NCI-N87, and (22.94±1.33) and (19.60±2.21) μg/mL on MGC803, respectively. Statistical analysis revealed that malabaricone B had significantly stronger cytotoxicity than the parent compound (P〈0.01 on NCI-N87 and P〈0.05 on MGC803), which may indicate a bioactivation of malabaricone C by hepatic microsomes. These results suggest that malabaricone C has a simple biotransformation pathway by hepatic microsomes and provide valuable information for further investigation on both the parent compound and its biotransformation product as anti-gastric cancer agents or lead compounds.
文摘目的建立稳定过表达N-cadherin的人类胃癌MGC-803细胞系。方法从含有N-cadherin的质粒中利用PCR技术克隆N-cadherin基因编码序列。制备并浓缩慢病毒颗粒,将构建好的过表达N-cadherin慢病毒载体感染MGC-803细胞,并稳定遗传,嘌呤霉素筛选的阳性克隆传代培养5代后鉴定细胞内N-cadherin的表达。结果荧光显微镜下过表达N-cadherin组细胞有绿色荧光表达;PCR扩增得到含N-cadherin基因编码序列的特异性条带;重组的过表达N-cadherin载体中,过表达N-cadherin编码序列与目标序列几乎一致;Western blotting结果显示,在分子量为98 k D处有相应条带。结论成功建立稳定过表达N-cadherin的人类胃癌MGC-803细胞,此研究为进一步探讨N-cadherin基因的功能提供了良好的研究基础。