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  • Title: Between hyperfiltration and impairment: demystifying early renal functional changes in diabetic nephropathy.
    Author: Rosolowsky ET, Niewczas MA, Ficociello LH, Perkins BA, Warram JH, Krolewski AS.
    Journal: Diabetes Res Clin Pract; 2008 Nov 13; 82 Suppl 1():S46-53. PubMed ID: 18849087.
    Abstract:
    Renal functional changes in diabetic nephropathy conventionally have been linked to progression of urinary albumin excretion. This paradigm was based on historic evidence noting that hyperfiltration occurred in the setting of normoalbuminuria and microalbuminuria and that loss of renal function began in the context of proteinuria. More contemporaneous research findings, using serum cystatin-C-based estimates of glomerular filtration rate (cC-GFR), have challenged this paradigm. Rather, the process of renal function loss appears to begin prior to the onset of proteinuria. In the 2nd Joslin Kidney Study on the Natural History of Microalbuminuria, over one-third of type 1 diabetes (T1DM) patients with microalbuminuria at the time of enrollment already had evidence of mild (cC-GFR<90) or moderate (cC-GFR<60 ml/min) renal function impairment. Understanding the mechanisms underlying this phenomenon of early renal function impairment may allow for interventions directed at altering or retarding early renal function decline. To date, serum uric acid and components of the TNFalpha pathway appear to be involved.
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