目的观察60Co照射后体外培养的食管癌细胞株TE-13和ECA109细胞中MDC1和53BP1蛋白表达、ECA109细胞核内MDC1和53BP1斑点数量的变化,探讨放射线对食管癌细胞中相关蛋白表达的影响。方法 Western blot检测照射后细胞中MDC1和53BP1蛋白表达...目的观察60Co照射后体外培养的食管癌细胞株TE-13和ECA109细胞中MDC1和53BP1蛋白表达、ECA109细胞核内MDC1和53BP1斑点数量的变化,探讨放射线对食管癌细胞中相关蛋白表达的影响。方法 Western blot检测照射后细胞中MDC1和53BP1蛋白表达,激光共聚焦显微镜观察放射线照射后食管癌细胞ECA109中MDC1和53BP1细胞核内斑点数量的变化。结果 0、1、2、5、10Gy照射后1、2、24h,TE-13和ECA109细胞MDC1和53BP1蛋白表达未见明显变化(P>0.05);细胞接受不同剂量放射线照射后1h,MDC1和53BP1核内斑点的数量呈现明显剂量依赖性,与对照组(0Gy组)相比,差异具有统计学意义(P<0.05);同时发现4Gy放射线照射后30min(MDC1)～1h(53BP1)细胞核内斑点的数量最多,分别为26.3和36.7个,其后斑点的数量逐渐下降,与对照组(0Gy组)相比,差异均具有统计学意义(P<0.05)。结论单纯放射线照射未发现食管癌细胞中MDC1和53BP1蛋白表达发生明显变化,但两种蛋白在细胞核内斑点的数量与剂量和照射后时间存在明显的量效关系。展开更多
Objective： To investigate the association between gastric cardia adenocarcinoma （GCA） and ten functional single nueleotide polymorphisms （SNPs）, including TPY3BPI rs560191 G〉C, CASP8 rs1035142 G〉T, CASP7 rs3127...Objective： To investigate the association between gastric cardia adenocarcinoma （GCA） and ten functional single nueleotide polymorphisms （SNPs）, including TPY3BPI rs560191 G〉C, CASP8 rs1035142 G〉T, CASP7 rs3127075 G〉C, CASP7 rs7907519 C〉A, and six C1 orf 10/CRNN variants. We performed a hospital- based case-control study to evaluate the genetic effects of these SNPs. Methods： Two hundred and forty-three GCA cases and 476 controls were enrolled in this study. A custom- by-design 48-Plex SNPscanTM Kit was used to determine their genotypes. Results： When the TP^3BP1 rs560191 GG homozygote genotype was used as the reference group, the GC genotype was associated with a significantly increased risk of GCA. The CC genotype was not associated with the risk of GCA compared with the GG genotype. None of the CASP8 rs1035142 G〉T, CASP7 rs3127075 G〉C, CASP7 rs7907519 C〉A or the six ClorflO/CRNN polymorphisms showed a significant difference in genotype distributions between the cases and the controls. Conciusions： The results demonstrated that the functional polymorphism TP53BPI rs560191 G〉C might contribute to GCA susceptibility. However, the statistical power of our study was limited. Large, well- designed studies and further functional investigations are needed to confirm our findings.展开更多
文摘目的观察60Co照射后体外培养的食管癌细胞株TE-13和ECA109细胞中MDC1和53BP1蛋白表达、ECA109细胞核内MDC1和53BP1斑点数量的变化,探讨放射线对食管癌细胞中相关蛋白表达的影响。方法 Western blot检测照射后细胞中MDC1和53BP1蛋白表达,激光共聚焦显微镜观察放射线照射后食管癌细胞ECA109中MDC1和53BP1细胞核内斑点数量的变化。结果 0、1、2、5、10Gy照射后1、2、24h,TE-13和ECA109细胞MDC1和53BP1蛋白表达未见明显变化(P>0.05);细胞接受不同剂量放射线照射后1h,MDC1和53BP1核内斑点的数量呈现明显剂量依赖性,与对照组(0Gy组)相比,差异具有统计学意义(P<0.05);同时发现4Gy放射线照射后30min(MDC1)～1h(53BP1)细胞核内斑点的数量最多,分别为26.3和36.7个,其后斑点的数量逐渐下降,与对照组(0Gy组)相比,差异均具有统计学意义(P<0.05)。结论单纯放射线照射未发现食管癌细胞中MDC1和53BP1蛋白表达发生明显变化,但两种蛋白在细胞核内斑点的数量与剂量和照射后时间存在明显的量效关系。
基金supported in part by National Natural Science Foundation of China(No.81101889)
文摘Objective： To investigate the association between gastric cardia adenocarcinoma （GCA） and ten functional single nueleotide polymorphisms （SNPs）, including TPY3BPI rs560191 G〉C, CASP8 rs1035142 G〉T, CASP7 rs3127075 G〉C, CASP7 rs7907519 C〉A, and six C1 orf 10/CRNN variants. We performed a hospital- based case-control study to evaluate the genetic effects of these SNPs. Methods： Two hundred and forty-three GCA cases and 476 controls were enrolled in this study. A custom- by-design 48-Plex SNPscanTM Kit was used to determine their genotypes. Results： When the TP^3BP1 rs560191 GG homozygote genotype was used as the reference group, the GC genotype was associated with a significantly increased risk of GCA. The CC genotype was not associated with the risk of GCA compared with the GG genotype. None of the CASP8 rs1035142 G〉T, CASP7 rs3127075 G〉C, CASP7 rs7907519 C〉A or the six ClorflO/CRNN polymorphisms showed a significant difference in genotype distributions between the cases and the controls. Conciusions： The results demonstrated that the functional polymorphism TP53BPI rs560191 G〉C might contribute to GCA susceptibility. However, the statistical power of our study was limited. Large, well- designed studies and further functional investigations are needed to confirm our findings.
