Associations of urinary, glomerular, and tubular markers with the development of diabetic kidney disease in type 2 diabetes patients.
JOURNAL OF CLINICAL LABORATORY ANALYSIS(2018)
摘要
ObjectivesTo evaluate the associations of urinary markers (eg albumin), glomerular (eg transferrin [TRF], immunoglobulin G [IgG]), and tubular (eg 1-microglobulin [1-MG], 2-microglobulin [2-MG]) markers with the development of diabetic kidney disease (DKD) in type 2 diabetes patients, as assessed by estimated glomerular filtration rate (eGFR) and albuminuria. Material and methodsA total of 252 type 2 diabetes patients and 50 nondiabetic controls from Tianjin, China, were selected. Diabetic patients were divided into three groups according to eGFR levels, including groups A, B, and C with eGFR 90 (n=94), 60-89 (n=94), and 30-59 (n=64)mL/min/1.73m(2). Urine levels of glomerular and tubular markers were detected in first morning urine samples, and their associations with eGFR and albuminuria analyzed. ResultsUrinary levels of IgG, TRF, and 2-MG were significantly elevated in diabetic patients with normal eGFR compared with nondiabetic control subjects. Urinary levels of all markers increased per eGFR stratum. All kidney damage markers were significantly associated with eGFR in univariate analysis (standard between -0.35 and -0.28; all P<.001). After adjusting for known confounders, only the tubular markers 1-MG (standard =-0.25; P=.013) and 2-MG (standard =-0.18; P=.039) retained significant associations with eGFR. All kidney damage markers were significantly associated with albuminuria, independent of age, duration of diabetes, and eGFR (standard between 0.45 and 0.86; all P<.001). ConclusionOnly the tubular markers (1)-MG and (2)-MG were associated with eGFR independent of albuminuria, suggesting that they may play an important role in the development of DKD.
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关键词
1-microglobulin,2-microglobulin,albuminuria,diabetic kidney disease,glomerular filtrationrate
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