数据非依赖的质谱采集是近年来发展的一种新型多级质谱分析方法,只需一次进样便可同时快速获取所有母离子及其子离子信息。本研究以肺癌血浆样本为研究对象,采用数据非依赖的SWATH(sequential windowed acquisition of all theoretical ...数据非依赖的质谱采集是近年来发展的一种新型多级质谱分析方法,只需一次进样便可同时快速获取所有母离子及其子离子信息。本研究以肺癌血浆样本为研究对象,采用数据非依赖的SWATH(sequential windowed acquisition of all theoretical fragment ions)采集技术,建立了液相色谱-串联质谱法(LC-MS/MS)同时定性定量分析血浆代谢组。基于代谢物数据库识别比对,成功识别了93个代谢物,实现了代谢物的定性分析。对成功识别的代谢物建立定量分析方法并进行方法学考察。结果表明,其中90个代谢物的线性相关系数大于0.99,定量限在1.25~12000μg/L之间;其中有86个代谢物可以满足生物样本定量分析的要求,其连续4天的日内精密度和日间精密度均小于20%;在4℃下,96 h内的放置稳定性在0.62%~19.35%之间。该方法的覆盖率高,能同时快速准确地对肺癌血浆中癌症相关代谢物进行定性定量分析,也适用于其他生物样品,可以为定量代谢组学分析提供重要的方法学平台。展开更多
As the national performing arts centre in Singapore, Esplanade-Theatres on the Bay has been rated as one of the "15 most glamorous concert halls in the world" and one of the busiest arts centers in the world...As the national performing arts centre in Singapore, Esplanade-Theatres on the Bay has been rated as one of the "15 most glamorous concert halls in the world" and one of the busiest arts centers in the world. Since its official opening in 2002, the Esplanade has presented more than 37,000 performances, attracting 26 million guests and 92 mi1lion visitors. The Esplanade is Singapore s landmark building, shaped like a large durian, featuring the world s top performance venues, complemented by comprehensive professional support services. Its two main performance venues include a 1600-seat concert hall and a 2000-seat theatre.展开更多
文摘数据非依赖的质谱采集是近年来发展的一种新型多级质谱分析方法,只需一次进样便可同时快速获取所有母离子及其子离子信息。本研究以肺癌血浆样本为研究对象,采用数据非依赖的SWATH(sequential windowed acquisition of all theoretical fragment ions)采集技术,建立了液相色谱-串联质谱法(LC-MS/MS)同时定性定量分析血浆代谢组。基于代谢物数据库识别比对,成功识别了93个代谢物,实现了代谢物的定性分析。对成功识别的代谢物建立定量分析方法并进行方法学考察。结果表明,其中90个代谢物的线性相关系数大于0.99,定量限在1.25~12000μg/L之间;其中有86个代谢物可以满足生物样本定量分析的要求,其连续4天的日内精密度和日间精密度均小于20%;在4℃下,96 h内的放置稳定性在0.62%~19.35%之间。该方法的覆盖率高,能同时快速准确地对肺癌血浆中癌症相关代谢物进行定性定量分析,也适用于其他生物样品,可以为定量代谢组学分析提供重要的方法学平台。
文摘As the national performing arts centre in Singapore, Esplanade-Theatres on the Bay has been rated as one of the "15 most glamorous concert halls in the world" and one of the busiest arts centers in the world. Since its official opening in 2002, the Esplanade has presented more than 37,000 performances, attracting 26 million guests and 92 mi1lion visitors. The Esplanade is Singapore s landmark building, shaped like a large durian, featuring the world s top performance venues, complemented by comprehensive professional support services. Its two main performance venues include a 1600-seat concert hall and a 2000-seat theatre.