TMT-Based Quantitative Proteomic Analysis Identification of Integrin Alpha 3 and Integrin Alpha 5 as Novel Biomarkers in Pathogenesis of Acute Aortic Dissection.

Abstract

BACKGROUND:

Acute aortic dissection (AAD) is a devastating cardiovascular disease with a high rate of disability and mortality. This disease often rapidly progresses to fatal multiple organ hypoperfusion, and the incidence has been increasing in recent years. However, the molecular mechanisms have yet to be clarified. This study is aimed at identifying the differential abundance proteins (DAPs) of aortic arch tissues in patients with AAD by proteomics and select possible proteins involved in AAD pathogenesis.

METHODS:

The fresh aortic arch tissues obtained from 5 AAD patients and 1 healthy donor were analyzed by amine-reactive tandem mass tag (TMT) labelling and mass spectrometry; then, the pathological sections of another 10 healthy donors and 20 AAD patients were chosen to verify the proteomic results by immunohistochemistry.

RESULTS:

Of 809 proteins identified by proteomic analysis, 132 differential abundance proteins (DAPs) were screened, of which 100 proteins were significantly downregulated while 32 upregulated. Among 100 downregulated proteins, two proteins with known function, integrin alpha 3 (ITGA-3) and ITGA-5, were selected as target proteins involved in AAD pathogenesis. Two target DAPs were verified by immunohistochemisty, and the results showed that the integrated option density (IOD) of ITGA-3 and ITGA-5 in AAD patients was significantly lower than that in healthy donors, which were consistent with the proteomic results (P < 0.001).

CONCLUSION:

ITGA-3 and ITGA-5 represent novel biomarkers for the pathogenesis of AAD and might be a therapeutic target in the future.

• Authors: Lingyu Xing, Yuan Xue, Yilin Yang, Ping Wu, Catherine C L Wong, Haojun Wang, Zhenju Song, Dongwei Shi, Chaoyang Tong, Chenling Yao, Guorong Gu
• Journal: BioMed research international (Biomed Res Int) Vol. 2020 Pg. 1068402 ( 2020) ISSN: 2314-6141 [Electronic] United States
• PMID: 32851057 (Publication Type: Journal Article)
• Copyright: Copyright © 2020 Lingyu Xing et al.

Chemical References

• Biomarkers
• ITGA3 protein, human
• ITGA5 protein, human
• Integrin alpha3
• Integrins
• Proteome

Topics

• Aortic Dissection (genetics, pathology)
• Aorta, Thoracic (metabolism, pathology)
• Aortic Aneurysm (genetics, pathology)
• Biomarkers (blood)
• Cardiovascular Diseases (genetics, pathology)
• Female
• Gene Expression Regulation (genetics)
• Humans
• Integrin alpha3 (genetics)
• Integrins (genetics)
• Male
• Mass Spectrometry
• Proteome (genetics)