基于iTRAQ多重标记串联质谱技术系统性筛选乳腺癌患者血清蛋白表达的差异分析

目的 观察串联质谱技术在乳腺癌血清蛋白表达中的差异。方法 选取2020年2月~2021年2月黑龙江省牡丹江医学院附属二院收治的乳腺癌新辅助化疗患者20例作为研究组,包含10例化疗有效患者及10例化疗无效患者,同时选取8名健康者作为对照组。采集所有患者的肘静脉血,分别采用高通量miRNA、iTRAQ表达谱测序技术,从“组学”的角度对乳腺癌新辅助化疗不同疗效患者miRNA差异表达谱、外周血单个核细胞蛋白组进行研究。随后,先进行Pathway通路分析,该过程在蛋白质层面进行,然后找出sRNA的成熟体序列,在此过程中严格根据miRbase18数据库。将已知的cDNA序列整理为一行,对得到的sRNA对应靶基因进行预测,Pathway分析靶基因,最后将同一Pathway通路中的sRNA靶基因及蛋白质寻找出来。结果 研究组和对照组共筛选出19个差异表达蛋白,选取其中具有较大表达差异的肝细胞生长因子(HGF)进行验证。iTRAQ标记图谱显示,研究组和对照组的血清HGF表达水平比较,差异有统计学意义(P<0.05)。研究组Ⅰ期、Ⅱ期、Ⅲ期患者的血清HGF表达水平逐渐升高(P<0.05),均高于对照组(均P<0.05),符合i TRAQ标记图谱鉴定结果。结论 串联质谱技术用于筛选发现乳腺癌细胞HGF表达水平升高具有显著效果,可有效指导临床诊治乳腺癌的工作,将有效参考提供给靶向治疗药物的开发。

Hospital System Vulnerability to a Moderate Earthquake

This research aims at proposing to the technical manager of a hospital, a method for assessing the vulnerability of the hospital system in the case of a moderate earthquake. A primary case study on a hospital centre has allowed us to define the methodological basis. Also, it concludes to the need for a systematic method due to the complexity of hospital system and the specific knowledge. This ＂screening method＂ exits but it is applicable to the context of a major earthquake, where the main objective is to save life, while ours is to guarantee the continuity of hospital services. Other aims are to adapt this method in order to introduce the concept of a moderate earthquake, to take into account the environmental interactions of the hospital system and to improve the knowledge base. Subsequently, a software tool has to be developed to facilitate the implementation for the technical manager.