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  • Title: Serum endogenous secretory RAGE level is an independent risk factor for the progression of carotid atherosclerosis in type 1 diabetes.
    Author: Katakami N, Matsuhisa M, Kaneto H, Matsuoka TA, Sakamoto K, Yasuda T, Umayahara Y, Kosugi K, Yamasaki Y.
    Journal: Atherosclerosis; 2009 May; 204(1):288-92. PubMed ID: 18926539.
    Abstract:
    OBJECTIVE: Advanced glycation end-products (AGEs) and the receptor for AGEs (RAGE) system plays an important role in the development of atherosclerosis. It has been recently reported that endogenous secretory RAGE (esRAGE) and total soluble RAGE (sRAGE) levels are associated with diabetic complications. The aim of the present study is to longitudinally evaluate the association between esRAGE and sRAGE levels and the progression of carotid intima-media thickness (IMT), a surrogate marker of atherosclerosis. METHODS AND RESULTS: Japanese type 1 diabetic patients (n=47, aged 24.0+/-3.1 years) were enrolled into a 4-year follow-up study and annual measurements of serum esRAGE and sRAGE levels and IMTs were performed. At baseline, mean-IMT was inversely correlated with circulating esRAGE levels (r=-0.317, p=0.0292), whereas there was not statistical significance between mean-IMT and sRAGE levels. Mean-IMT significantly increased during the follow-up period (from 0.63+/-0.10 to 0.67+/-0.10mm, p=0.0022). Annual increase in mean-IMT (=(mean-IMT after 4 years-mean-IMT at baseline)/4) was positively correlated with the arithmetic average of systolic blood pressure (r=0.310, p=0.0332) and triglyceride (r=0.337, p=0.0201), and inversely correlated with circulating esRAGE levels (r=-0.360, p=0.0124) and sRAGE levels (r=-0.406, p=0.0042) during the follow-up period. Furthermore, stepwise multivariate regression analyses revealed that continuous low levels of circulating esRAGE and sRAGE were determinants of the progression of mean-IMT independently of conventional risk factors. CONCLUSIONS: Circulating esRAGE level as well as sRAGE level was an independent risk factor for the progression of carotid IMT in type 1 diabetic subjects.
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