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COMPARATIVE STUDY
JOURNAL ARTICLE

Serum levels of sRAGE, the soluble form of receptor for advanced glycation end products, are associated with inflammatory markers in patients with type 2 diabetes

Kazuo Nakamura, Sho-ichi Yamagishi, Hisashi Adachi, Yayoi Kurita-Nakamura, Takanori Matsui, Takafumi Yoshida, Tsutomu Imaizumi
Molecular Medicine 2007, 13 (3-4): 185-9
17592553
Advanced glycation end products (AGEs) and their receptor (RAGE) play an important role in accelerated atherosclerosis in diabetes. We have recently found that the soluble form of RAGE (sRAGE) levels are significantly higher in type 2 diabetic patients than in nondiabetic subjects and positively associated with the presence of coronary artery disease in diabetes. In this study, we examined whether serum levels of sRAGE correlated with inflammatory biomarkers in patients with type 2 diabetes. Eighty-six Japanese type 2 diabetic patients (36 men and 50 women, mean age 68.4+/-9.6 years) underwent a complete history and physical examination, determination of blood chemistries, sRAGE, monocyte chemotactic protein-1 (MCP-1), adiponectin, tumor necrosis factor-alpha (TNF-alpha), and interleukin-6 (IL-6). Univariate regression analysis showed that serum levels of sRAGE positively correlated with alanine aminotransferase (ALT) (r=0.437, P=0.0001), MCP-1 (r=0.359, P=0.001), TNF-alpha (r=0.291, P=0.006), and hyperlipidemia medication (r=0.218, P=0.044). After multiple regression analyses, ALT (P<0.0001), MCP-1 (P=0.007), and TNF-alpha (P=0.023) remained significant. The present study demonstrates for the first time that serum levels of sRAGE are positively associated with MCP-1 and TNF-alpha levels in type 2 diabetic patients. These observations suggest the possibility that sRAGE level may become a novel biomarker of vascular inflammation in type 2 diabetic patients.

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