In order to study the mechanism of the effect of heparin on apoptosis in carcinoma cells, the nasopharyngeal carcinoma cell line CNE2 was used to identify the effect of heparin on apoptosis associated with the express...In order to study the mechanism of the effect of heparin on apoptosis in carcinoma cells, the nasopharyngeal carcinoma cell line CNE2 was used to identify the effect of heparin on apoptosis associated with the expression of c-myc, bax, bcl-2 proteins by use of Hoechst 33258 staining, terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL), agarose gel electrophoresis, and flow cytometry, as well as Western blot analysis. The results showed that heparin induced apoptosis of CNE2 cells including the morphologic changes such as reduction in the volume, and the nuclear chromatin condensation, as well as the 'ladder pattern' revealed by agarose gel electrophoresis of DNA in a concentration-dependent manner. The number of TUNEL-positive cells was dramatically increased to 33.6+/-1.2% from 2.8+/-0.3% by treatment with heparin in different concentrations (10 to approximately 40 kU/L). The apoptotic index was increased to 32.5% from 3.5% by detecting SubG1 peaks on flow cytometry. Western blot analysis showed that levels of bcl-2, bax and c-myc were significantly overexpressed by treatment with the increase of heparin concentrations. These results suggest that heparin induces apoptosis of CNE2 cells, which may be regulated by differential expression of apoptosis-related genes.展开更多
目的研究基质金属蛋白酶-1(matri xmetalloproteinases-1,MMP-1)(-1607)1G/2G基因单核苷酸多态性与云南汉族鼻咽癌发病风险、各临床参数及预后相关性。方法按病例对照研究,利用聚合酶链反应-限制性片段长度多态性(restriction fragment ...目的研究基质金属蛋白酶-1(matri xmetalloproteinases-1,MMP-1)(-1607)1G/2G基因单核苷酸多态性与云南汉族鼻咽癌发病风险、各临床参数及预后相关性。方法按病例对照研究,利用聚合酶链反应-限制性片段长度多态性(restriction fragment lengthpolymorphism-PCR,RFLP-PCR),对241例云南籍汉族鼻咽癌患者和272例云南籍汉族健康对照进行基因分型,分析基因型与云南汉族鼻咽癌发病风险及预后关系。结果分别携带1G2G、2G2G基因型个体罹患鼻咽癌风险性是携带1G1G基因型者3.10倍和9.93倍;2G等位基因与T分期、颈淋巴结转移、临床分期明显相关(P<0.05)。吸烟与MMP-1(-1607)2G等位基因存在相加交互作用;MMP-12G等位基因与患者预后不良相关,且2G2G基因型为独立预后影响因素。结论MMP-1(-1607)1G/2G多态性是云南汉族鼻咽癌遗传易感因素,与吸烟暴露呈现交互作用,同时与鼻咽癌预后相关。展开更多
文摘In order to study the mechanism of the effect of heparin on apoptosis in carcinoma cells, the nasopharyngeal carcinoma cell line CNE2 was used to identify the effect of heparin on apoptosis associated with the expression of c-myc, bax, bcl-2 proteins by use of Hoechst 33258 staining, terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL), agarose gel electrophoresis, and flow cytometry, as well as Western blot analysis. The results showed that heparin induced apoptosis of CNE2 cells including the morphologic changes such as reduction in the volume, and the nuclear chromatin condensation, as well as the 'ladder pattern' revealed by agarose gel electrophoresis of DNA in a concentration-dependent manner. The number of TUNEL-positive cells was dramatically increased to 33.6+/-1.2% from 2.8+/-0.3% by treatment with heparin in different concentrations (10 to approximately 40 kU/L). The apoptotic index was increased to 32.5% from 3.5% by detecting SubG1 peaks on flow cytometry. Western blot analysis showed that levels of bcl-2, bax and c-myc were significantly overexpressed by treatment with the increase of heparin concentrations. These results suggest that heparin induces apoptosis of CNE2 cells, which may be regulated by differential expression of apoptosis-related genes.
文摘目的研究基质金属蛋白酶-1(matri xmetalloproteinases-1,MMP-1)(-1607)1G/2G基因单核苷酸多态性与云南汉族鼻咽癌发病风险、各临床参数及预后相关性。方法按病例对照研究,利用聚合酶链反应-限制性片段长度多态性(restriction fragment lengthpolymorphism-PCR,RFLP-PCR),对241例云南籍汉族鼻咽癌患者和272例云南籍汉族健康对照进行基因分型,分析基因型与云南汉族鼻咽癌发病风险及预后关系。结果分别携带1G2G、2G2G基因型个体罹患鼻咽癌风险性是携带1G1G基因型者3.10倍和9.93倍;2G等位基因与T分期、颈淋巴结转移、临床分期明显相关(P<0.05)。吸烟与MMP-1(-1607)2G等位基因存在相加交互作用;MMP-12G等位基因与患者预后不良相关,且2G2G基因型为独立预后影响因素。结论MMP-1(-1607)1G/2G多态性是云南汉族鼻咽癌遗传易感因素,与吸烟暴露呈现交互作用,同时与鼻咽癌预后相关。
