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26 October 2016 : Laboratory Research  

Angiotensin II Promotes the Development of Carotid Atherosclerosis in Type 2 Diabetes Patients via Regulating the T Cells Activities: A Cohort Study

Kai WangBC, Feng JinCF, Zhanpu ZhangDF, Xiaochuan SunAE

DOI: 10.12659/MSM.900842

Med Sci Monit 2016; 22:4000-4008

Abstract

BACKGROUND: Specific T cell phenotype has been reported to potentially contribute to the development of angiotensin II (Ang II)-induced several vascular disorders. Type 2 diabetes mellitus (T2DM) is intimately associated with cardiovascular disease. The present study aimed to investigate the relationship between T cell phenotypes and Ang II in T2DM patients combined with carotid atherosclerosis (CA).

MATERIAL AND METHODS: This study was performed on 50 patients with T2DM in our hospital. Based on the presence of CA, they were divided into CA group (presence of CA, n=30) or T2DM group (absence of CA, n=20). Additionally, 10 healthy participants were selected as controls. Basic characteristics of all participants were collected and recorded. Peripheral blood mononuclear cells (PBMCs) isolated from patients and controls with or without Ang II and Ang II receptor blocker (ARB) treatment were used to detect Th1, Th2, and Th17 cell proportions, mRNA levels of T-bet, GATA3, and RORγt as well as the expression of IFN-γ, IL-4, and IL-17 by flow cytometry, ELISA, and Real-Time PCR.

RESULTS: Ang II levels were notably higher in patients in the CA group than those in the T2DM and control group (p<0.05). Th1 and Th17 positive cells, mRNA levels of T-bet and RORgt as well as the expression of IFN-γ and IL-17 were significantly increased in the CA group compared with the T2DM group and control group (p<0.05). Moreover, the activities of T cells and related cytokines were significantly increased of healthy controls after Ang II treatment (p<0.05), while these changes were notably weakened by ARB treatment (p<0.05).

CONCLUSIONS: Ang II promotes the development of CA in T2DM patients by regulating T cells activities.

Keywords: Angiotensin II, Carotid Artery Diseases, Diabetes Mellitus, Type 2

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750