目的:利用生物信息学方法分析甲状腺乳头状癌(papi l lar y thyroid carcinoma,PTC)颈部淋巴结转移的关键基因。方法:从美国国立生物技术信息中心(National Center for Biotechnology Information,NCBI)公共数据平台高通量基因表达(Gene...目的:利用生物信息学方法分析甲状腺乳头状癌(papi l lar y thyroid carcinoma,PTC)颈部淋巴结转移的关键基因。方法:从美国国立生物技术信息中心(National Center for Biotechnology Information,NCBI)公共数据平台高通量基因表达(Gene Expression Omnibus,GEO)数据库检索得到PTC的基因芯片GSE60542,使用GEO2R在线分析工具分别筛选PTC和癌旁组织的差异表达基因(差异表达基因集A)以及PTC与颈部淋巴结转移癌组织之间的差异表达基因(差异表达基因集B)。进一步筛选出差异表达基因集A和差异表达基因集B交集的差异表达基因集C。通过生物信息学工具David,String,cBioPortal对差异表达基因集C进行生物学功能及其编码蛋白的互作分析,并对差异表达基因集C进行生存分析。结果:通过分析GSE60542芯片数据,一共获得1086个差异表达基因A、194个差异表达基因B、39个差异表达基因C。基因本体(Gene Ontology,GO)分析显示:差异表达基因集C主要的分子功能与氧化还原酶活性、蛋白质同源二聚化活性、生长因子结合有关;这些基因主要参与细胞增殖、甲状腺激素的产生、神经细胞凋亡过程的负调节、γ-氨基丁酸信号转导途径等生物学过程。通过cBioPortal在线分析网站,初步筛选出对患者生存时间影响较大的基因CCL21。结论:基因芯片结合生物信息学方法能够有效分析PTC组织、癌旁组织以及颈部淋巴结转移癌组织间差异表达基因,并筛选出PTC颈部淋巴结转移相关的关键基因,为进一步研究PTC颈部淋巴结转移的分子机制提供一定的指导。展开更多
Based on conventional high-altitude aerial and ground data, regional intensive rainfall data, Doppler weather radar and satellite cloud data, the occurrence and development process of a regional rainstorm in South Sha...Based on conventional high-altitude aerial and ground data, regional intensive rainfall data, Doppler weather radar and satellite cloud data, the occurrence and development process of a regional rainstorm in South Shaanxi during July 17 -18, 2010 was discussed deeply. The results showed that the occurrence and development of the mesoscale weather system resulted in the heavy storm directly besides favorable large-scale background, and the the occurrence and development of the system had strong local and sudden characters. In addition, heavily concentrated wa- ter vapor in the troposphere at low and middle altitudes as well as existence of unstable conditions of convection might be favorable to the develop- ment of the system, while dynamic action of terrain, ground weak cold front and disturbance of the low-level jet stream might trigger the occurrence and development of the system.展开更多
文摘目的:利用生物信息学方法分析甲状腺乳头状癌(papi l lar y thyroid carcinoma,PTC)颈部淋巴结转移的关键基因。方法:从美国国立生物技术信息中心(National Center for Biotechnology Information,NCBI)公共数据平台高通量基因表达(Gene Expression Omnibus,GEO)数据库检索得到PTC的基因芯片GSE60542,使用GEO2R在线分析工具分别筛选PTC和癌旁组织的差异表达基因(差异表达基因集A)以及PTC与颈部淋巴结转移癌组织之间的差异表达基因(差异表达基因集B)。进一步筛选出差异表达基因集A和差异表达基因集B交集的差异表达基因集C。通过生物信息学工具David,String,cBioPortal对差异表达基因集C进行生物学功能及其编码蛋白的互作分析,并对差异表达基因集C进行生存分析。结果:通过分析GSE60542芯片数据,一共获得1086个差异表达基因A、194个差异表达基因B、39个差异表达基因C。基因本体(Gene Ontology,GO)分析显示:差异表达基因集C主要的分子功能与氧化还原酶活性、蛋白质同源二聚化活性、生长因子结合有关;这些基因主要参与细胞增殖、甲状腺激素的产生、神经细胞凋亡过程的负调节、γ-氨基丁酸信号转导途径等生物学过程。通过cBioPortal在线分析网站,初步筛选出对患者生存时间影响较大的基因CCL21。结论:基因芯片结合生物信息学方法能够有效分析PTC组织、癌旁组织以及颈部淋巴结转移癌组织间差异表达基因,并筛选出PTC颈部淋巴结转移相关的关键基因,为进一步研究PTC颈部淋巴结转移的分子机制提供一定的指导。
文摘Based on conventional high-altitude aerial and ground data, regional intensive rainfall data, Doppler weather radar and satellite cloud data, the occurrence and development process of a regional rainstorm in South Shaanxi during July 17 -18, 2010 was discussed deeply. The results showed that the occurrence and development of the mesoscale weather system resulted in the heavy storm directly besides favorable large-scale background, and the the occurrence and development of the system had strong local and sudden characters. In addition, heavily concentrated wa- ter vapor in the troposphere at low and middle altitudes as well as existence of unstable conditions of convection might be favorable to the develop- ment of the system, while dynamic action of terrain, ground weak cold front and disturbance of the low-level jet stream might trigger the occurrence and development of the system.