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Title: Is Cystatin C a Useful Marker in the Detection of Diabetic Kidney Disease?
Authors: Borges, Rodolfo L. [UNIFESP]
Hirota, Andrea H.
Quinto, Beata M. R. [UNIFESP]
Ribeiro, Arthur B. [UNIFESP]
Zanella, Maria T.
Batista, Marcelo C. [UNIFESP]
Universidade Federal de São Paulo (UNIFESP)
Keywords: Diabetes type 2
Cystatin C
Diabetic nephropathy
Issue Date: 1-Jan-2010
Publisher: Karger
Citation: Nephron Clinical Practice. Basel: Karger, v. 114, n. 2, p. C127-C134, 2010.
Abstract: Background/Aims: To evaluate cystatin C as a marker of diabetic kidney disease in normoalbuminuric diabetic patients without chronic kidney disease (CKD). Methods: A cross-sectional study was carried out comprising 243 hypertensive patients, 61 of them with type 2 diabetes, presenting normoalbuminuria and an estimated glomerular filtration rate (eGFR) >= 60 ml/min/1.73 m(2). Renal function assessment included determinations of serum creatinine and cystatin C levels, microalbuminuria, as well as eGFR through Cockcroft-Gault and Modification of Diet in Renal Disease equations. Results: Diabetic patients presented higher cystatin C levels than nondiabetic patients (0.95 +/- 0.19 vs. 0.89 +/- 0.17 mg/l; p < 0.05). in the binary logistic regression, the presence of diabetes and metabolic syndrome was significantly associated with elevated cystatin C levels. Diabetic patients also presented a slightly greater albuminuria (6.72 +/- 4.43 vs. 5.07 +/- 3.59 mu g/min; p < 0.05). Conclusions: Our results suggest that elevated cystatin C levels in diabetic patients may identify a certain degree of renal dysfunction even when albuminuria and eGFR do not mirror CKD. Longitudinal studies with direct GFR measures need to be done in order to confirm the value of cystatin C as an indicative of worse renal outcomes in the diabetic population. Copyright (C) 2009 S. Karger AG, Basel
ISSN: 1660-2110
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