[Analysis on tissue-related biomarkers in patients with acute aortic dissection].

Objective: To explore the clinical implication of tissue-related biomarkers in patients with acute aortic dissection (AAD). Methods: It was a cross-sectional study. Ten Stanford Type A AAD patients, who were diagnosed and surgically treated in the Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, from December 2018 to August 2019, were selected as the case group. Meanwhile, 10 patients with atherosclerotic heart disease, who underwent coronary artery bypass grafting (CABG), were selected as control group. The ascending aorta tissue specimens from patients of the two groups were collected during the operation. Four-dimensional non-standard quantitative proteomics technology (4D-LFQ) was used to detect the protein profile of ascending aorta tissue specimens of the two groups and to screen out differentially expressed proteins and analyze their biological functions. Precise quantification of the selected target proteins was achieved by parallel response monitoring (PRM). Results: A total of 3 985 proteins were identified by 4D-LFQ technology, among which 3 350 proteins could be quantified. There were 39 proteins were significantly upregulated and 47 proteins were significantly downregulated in AAD group. The results of biological function analysis showed that most of the differentially expressed proteins were located in the extracellular, and their functions were mainly involved in cell migration and proliferation, inflammatory cell activation, cell contraction, and muscle organ development. The 15 selected proteins underwent precise quantification by PRM, and the results showed that integrin α-Ⅱb (ITGA2B), integrin α-M (ITGAM), integrin β-2 (ITGB2), integrin β-3 (ITGB3) were significantly upregulated in the ascending aorta tissue of AAD patients. Conclusion: ITGA2B, ITGAM, ITGB2, and ITGB3 are highly expressed in aortic tissues of patients with AAD, which may be used as biomarkers for the diagnosis of AAD patients.目的： 探索急性主动脉夹层（AAD）患者的组织相关生物标志物。 方法： 该研究为横断面研究。连续选择2018年12月至2019年8月在新疆医科大学第一附属医院心外科确诊并进行手术治疗的Stanford A型AAD患者10例作为病例组（AAD组），同时选取行冠状动脉旁路移植术（CABG）的冠状动脉粥样硬化性心脏病患者10例作为对照组（CABG组）。术中留取两组患者的升主动脉组织标本。采用四维非标定量蛋白质组学技术（4D-LFQ）分析患者升主动脉组织标本的蛋白质谱变化，筛选出差异表达蛋白并分析其生物学功能。然后应用平行反应监测（PRM）技术对选定的靶蛋白进行精准定量验证。 结果： 通过4D-LFQ技术共鉴定到3 985个蛋白，其中3 350个蛋白可定量。在所定量到的蛋白中39个上调，47个下调。生物信息学分析结果显示大多数差异表达蛋白位于胞外区，功能主要涉及细胞迁移增殖、炎症细胞激活、细胞收缩、肌肉器官发育等。PRM技术对选定的15个目标蛋白精准定量，发现整合素α-Ⅱb、整合素α-M、整合素β-2和整合素β-3在AAD组患者升主动脉组织中高表达。 结论： 整合素α-Ⅱb、整合素α-M、整合素β-2和整合素β-3在AAD患者升主动脉组织中高表达，或可作为诊断AAD患者的生物标志物。.