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BioMed Research International
Volume 2017 (2017), Article ID 6761549, 12 pages
Research Article

Quantitative Serum Proteomic Analysis of Essential Hypertension Using iTRAQ Technique

1Shandong University of Traditional Chinese Medicine, 4655 Daxue Road, Changqing District, Jinan, Shandong Province, China
2Affiliated Hospital of Shandong University of Traditional Chinese Medicine, 16369 Jingshi Road, Lixia District, Jinan, Shandong Province, China
3Affiliated Hospital of Shandong Academy of Medical Sciences, 38 Shadowless Hill Road, Tianqiao District, Jinan, Shandong Province, China

Correspondence should be addressed to Yun-Lun Li

Received 5 April 2017; Accepted 1 August 2017; Published 22 October 2017

Academic Editor: Yudong Cai

Copyright © 2017 Jing-Wen Xu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Essential hypertension (EH) is a risk factor for some severe diseases. This study aimed to screen out serum special proteins and seek interaction between them, which would provide new therapeutic targets and elucidate the comprehensive pathophysiological mechanism for EH. Patients with EH (Group A, ) and healthy controls (HC) (Group B, ) were recruited in this study. Serums from the two groups were analyzed with isobaric tags for relative and absolute quantitation coupled two-dimensional liquid chromatography followed by electrospray ionization-tandem mass spectrometry technique, while the candidate special proteins were verified with ELISA and western blot. A total of 404 proteins were identified, of which 30 proteins were upregulated (>1.2-fold, ) and 81 proteins were downregulated (<0.833-fold, ) compared with HC group. With GO, KEGG analysis, and literature retrieval, 4 proteins, cathepsin G, transforming growth factor beta-1, hyaluronidase-1, and kininogen-1, were found jointly involved in the renin-angiotensin-aldosterone system and kallikrein-kinin system. The profiles of these 4 candidate proteins were confirmed with ELISA and western blot. The concentration variation of these 4 proteins could better predict the occurrence and illustrate the pathophysiological mechanism of EH. And their discovery may help pave the way for exploring new therapies of EH.