Plasma sRAGE is not associated with urinary microalbumin excretion in type 2 diabetic nephropathy at the early stage

Jiang-Yi Yu, Xiao-Fei An, Jing-Shun Liu, Shi-Chao Ten, Xin Wang, Yue Zhao, Sha Huang, Wan-Jian Gu, Feng Gao
Diabetes Research and Clinical Practice 2010, 87 (2): 157-60

AIMS: The interaction of advanced glycation end products (AGEs) and the receptor for advanced glycation end products (RAGE) has played an important role in the pathogenesis of diabetic nephropathy. In the present study, we measured the relationship of plasma soluble isoform of RAGE (sRAGE) and urinary microalbumin excretion in the early stage of type 2 diabetic nephropathy.

METHODS: 180 patients with early stage of type 2 diabetic nephropathy were recruited into the study. Plasma sRAGE and the characterized AGE carboxymethyllysine (CML) were measured by enzyme-linked immunosorbent assay.

RESULTS: Plasma sRAGE positively correlated with the level of CML (R=0.22, P=0.03) while sRAGE was not significantly correlated with the urinary mAlb/Cr (R=0.15, P=NS). On stepwise linear regression analysis, AGE and GFR were the main independent determinants of plasma sRAGE concentration.

CONCLUSION: Plasma sRAGE is not significantly associated with urinary microalbumin excretion in the early stage of diabetic nephropathy while it is correlated positively with circulating AGE and negatively with glomerular filtration rate (GFR).

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