Background: Advanced glycation end product (AGE) accumulation is thought to be an independent predictor for cardiovascular disease in people with diabetes and renal failure. Since it has remained unclear whether AGE has a clinical impact on diabetic kidney disease (DKD) , the aim of this study was to determine the association between AGE accumulation, measured as skin autofluorescence (AF) , and the progression of DKD.
Methods: Skin AF was measured by AGE reader® and spot urine biomarkers, including albumin and liver-type fatty acid-binding protein (L-FABP) , were determined as the urine albumin-to-creatinine ratio (uACR) and the urine L-FABP-to-creatinine ratio (uL-FABPCR) in 300 Japanese people with diabetes (173 males and 127 females, mean age, 67.8 ± 10.7 years) . The relationships between skin AF and those urine biomarkers of DKD were statistically evaluated.
Results: Simple regression analysis showed that skin AF was associated with uACR (p<0.05) , log-transformed uACR (p<0.01) and uL-FABPCR (p<0.001) . On the other hand, multivariate regression analysis including clinical confounding factors showed that skin AF independently contributed to the increment of uL-FABPCR (P <0.05) but not to that of uACR (P=0.399) or log-transformed uACR (P=0.315) .
Conclusion: Skin AF was associated with urinary L-FABP but not with albuminuria in people with diabetes. The results suggest that skin AF can serve as a novel predictive factor for the development of diabetic tubular injury.
H.Yamagami: None. T.Yuasa: None. S.Yoshida: None. A.Kuroda: None. M.Matsuhisa: Research Support; Nissui , Sysmex Corp., Speaker's Bureau; Astellas Pharma Inc., Eli Lilly and Company, Merck Sharp & Dohme Corp., Mitsubishi Tanabe Pharma Corporation, Novo Nordisk, Sanofi, Sumitomo Dainippon Pharma Co., Ltd., Takeda Pharmaceutical Company Limited. I.Endo: None. K.Aihara: None. M.Abe: None. S.Yasui: None. M.Hosoki: None. T.Hori: None. T.Hara: None. Y.Mitsui: None. K.Kurahashi: None. S.Nakamura: None. T.Otoda: None.