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Nguyen, T.Q. et al.

Nguyen, Tarnow, Andersen, Hovind, Parving, Goldschmeding, van Nieuwenhoven,

Urinary connective tissue growth factor excretion correlates with clinical markers of renal disease in a large population of type 1 diabetic patients with diabetic nephropathy.

OBJECTIVE: Levels of connective tissue growth factor (CTGF; CCN-2) in plasma are increased in various fibrotic disorders, including diabetic nephropathy. Recently, several articles have reported a strong increase of urinary CTGF excretion (U-CTGF) in patients with diabetic nephropathy. However, these studies addressed too small a number of patients to allow general conclusions to be drawn. Therefore, we evaluated U-CTGF in a large cross-sectional study of patients with type 1 diabetes. RESEARCH DESIGN AND METHODS: Subjects were 318 type 1 diabetic patients and 29 normoglycemic control subjects. U-CTGF was measured by sandwich enzyme-linked immunosorbent assay. Groups were compared by Kruskal-Wallis and Mann-Whitney analysis. The relation between U-CTGF and markers of diabetic nephropathy was determined by regression analysis. RESULTS: U-CTGF in patients with diabetic nephropathy (n = 89, median 155 pmol/24 h [interquartile range 96-258]) was significantly higher than in microalbuminuric (n = 79, 100 [65-78]) and normoalbuminuric (n = 150, 85 [48-127]) patients and control subjects (n = 29, 100 [78-114]). U-CTGF correlated with urinary albumin excretion (UAE) (R = 0.31) and glomerular filtration rate (R = -0.38) in patients with diabetic nephropathy. A standardized increase in U-CTGF was associated with diabetic nephropathy (odds ratio 2.3 [95% CI 1.7-3.1]), which was comparable with the odds ratios for diabetic nephropathy of increased HbA(1c) (2.0 [1.5-2.7]), and blood pressure (2.0 [1.5-2.6]). CONCLUSIONS: This is the first large cross-sectional study addressing U-CTGF in human type 1 diabetes. The observed association of U-CTGF with UAE and glomerular filtration rate might reflect a role of CTGF as progression promoter in diabetic nephropathy.[1]

References

Urinary connective tissue growth factor excretion correlates with clinical markers of renal disease in a large population of type 1 diabetic patients with diabetic nephropathy. Nguyen, T.Q., Tarnow, L., Andersen, S., Hovind, P., Parving, H.H., Goldschmeding, R., van Nieuwenhoven, F.A. Diabetes Care (2006) [Pubmed]

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