Objective: To select the ovarian carcinoma cell lines with high frequent metastasis and study the association between nm23-H1 gene expression and metastasis of ovarian carcinoma. Methods: Each ovarian cancer cell line...Objective: To select the ovarian carcinoma cell lines with high frequent metastasis and study the association between nm23-H1 gene expression and metastasis of ovarian carcinoma. Methods: Each ovarian cancer cell line was transplanted subcutaneously into the flank of nude mice, and the metastatic behavior was evaluated by counting lung tumor foci at different time points. The metastatic tumors were cultured in vitro, then substrain was established and transplanted subcutaneously three times. The RNA level of nm23 in 8 human ovarian cancer cell lines were examined by northern-blot. Results: Of the 8 human ovarian cancer cell lines, 4 had high requent metastatic potentiality. The expression of nm23 RNA in human ovarian cancer cells was inversely related to metastatic behavior in the experimental animals (r=0.96, P=0.0001). Conclusion: The difference of the tendency of metastasis which was determined by genetic and molecular levels was significant among different type of cell lines and subtypes. The expression of nm23 mRNA in human ovarian carcinomas was correlated closely with the reduced metastatic behavior in experimental animals and may serve as a sensitive prognostic indicator for ovarian cancer.展开更多
目的了解云南省麻疹野病毒不同基因型的流行分布状况。方法用B95a细胞[Epstein-Barr(EB) Virus-Transformed,Marmoset B Lymphoblastoid Cell Line;埃泼斯坦-巴尔病毒转化的绒猴淋巴母细胞]和Vero/SLAM细胞[Vero Cell Transfected to Ex...目的了解云南省麻疹野病毒不同基因型的流行分布状况。方法用B95a细胞[Epstein-Barr(EB) Virus-Transformed,Marmoset B Lymphoblastoid Cell Line;埃泼斯坦-巴尔病毒转化的绒猴淋巴母细胞]和Vero/SLAM细胞[Vero Cell Transfected to Express the Human Signaling Lymphocyte Activation Molecule(SLAM),淋巴信号激活因子转染的非洲绿猴肾细胞]从麻疹爆发和散发患者的标本中分离麻疹野病毒,用逆转录-聚合酶链反应扩增核蛋白(Nucleoprotein,N)基因羧基末端的676个核苷酸片段,对扩增产物进行核苷酸序列测定。并以N基因羧基末端450个核苷酸序列构建基因亲缘性关系树,进行核苷酸变异分析。结果云南省2004~2011年共分离和检测到46株麻疹病毒及2株病毒核酸,43株为H1基因型,分布于14个县(区)及四川省普格县;4株为d11基因型,分布于边境孟连县及缅甸的班康市;1株为A基因型,来自龙陵县。结论麻疹病毒H1基因型是云南省优势本土基因型,d11基因型是从缅甸输入后连续两年于缅甸接壤的地区发现的麻疹野病毒,A基因型为中国沪191疫苗株相似株。展开更多
基金This work was supported by the grants from 973 National Great Foundation Research Program of China(No.2002CB513100)the National Prominent Youth Foundation of China(No.30025017).
文摘Objective: To select the ovarian carcinoma cell lines with high frequent metastasis and study the association between nm23-H1 gene expression and metastasis of ovarian carcinoma. Methods: Each ovarian cancer cell line was transplanted subcutaneously into the flank of nude mice, and the metastatic behavior was evaluated by counting lung tumor foci at different time points. The metastatic tumors were cultured in vitro, then substrain was established and transplanted subcutaneously three times. The RNA level of nm23 in 8 human ovarian cancer cell lines were examined by northern-blot. Results: Of the 8 human ovarian cancer cell lines, 4 had high requent metastatic potentiality. The expression of nm23 RNA in human ovarian cancer cells was inversely related to metastatic behavior in the experimental animals (r=0.96, P=0.0001). Conclusion: The difference of the tendency of metastasis which was determined by genetic and molecular levels was significant among different type of cell lines and subtypes. The expression of nm23 mRNA in human ovarian carcinomas was correlated closely with the reduced metastatic behavior in experimental animals and may serve as a sensitive prognostic indicator for ovarian cancer.
文摘目的了解云南省麻疹野病毒不同基因型的流行分布状况。方法用B95a细胞[Epstein-Barr(EB) Virus-Transformed,Marmoset B Lymphoblastoid Cell Line;埃泼斯坦-巴尔病毒转化的绒猴淋巴母细胞]和Vero/SLAM细胞[Vero Cell Transfected to Express the Human Signaling Lymphocyte Activation Molecule(SLAM),淋巴信号激活因子转染的非洲绿猴肾细胞]从麻疹爆发和散发患者的标本中分离麻疹野病毒,用逆转录-聚合酶链反应扩增核蛋白(Nucleoprotein,N)基因羧基末端的676个核苷酸片段,对扩增产物进行核苷酸序列测定。并以N基因羧基末端450个核苷酸序列构建基因亲缘性关系树,进行核苷酸变异分析。结果云南省2004~2011年共分离和检测到46株麻疹病毒及2株病毒核酸,43株为H1基因型,分布于14个县(区)及四川省普格县;4株为d11基因型,分布于边境孟连县及缅甸的班康市;1株为A基因型,来自龙陵县。结论麻疹病毒H1基因型是云南省优势本土基因型,d11基因型是从缅甸输入后连续两年于缅甸接壤的地区发现的麻疹野病毒,A基因型为中国沪191疫苗株相似株。