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Updated: Aug 7, 2026

Assessment of Vascular Function in Patients With Chronic Kidney Disease
Published on: June 16, 2014
Cystatin C, kidney function and cardiovascular disease
Insights
Serum cystatin C levels, a marker for kidney function, are linked to cardiovascular disease risk and inflammation. Microinflammation may unify these associations, suggesting early chronic kidney dysfunction.
Area of Science:
- Biochemistry
- Nephrology
- Cardiology
Background:
- Cystatin C, a glomerular filtration rate marker, correlates with cardiovascular disease and early chronic kidney dysfunction.
- Local cystatin C deficiency in atherosclerotic lesions suggests a protective vascular role, potentially involving TGF-beta1.
Discussion:
- Serum cystatin C elevation is significantly associated with increased C-reactive protein (CRP), indicating a link to chronic inflammation.
- The widespread production of cystatin C suggests systemic factors, not local synthesis, primarily influence serum concentrations.
Key Insights:
- Microinflammation is proposed as a unifying concept linking cystatin C levels to both renal dysfunction and vascular disease.
- Cystatin C may serve as an early indicator of subclinical renal impairment and associated cardiovascular risk.
Outlook:
- Further research into the role of microinflammation in cystatin C metabolism and cardiovascular outcomes is warranted.
- Investigating cystatin C as a biomarker for early detection and management of chronic kidney disease and atherosclerosis is crucial.
Abstract:
Cystatin C, an endogenous low-molecular-weight marker of glomerular filtration rate, has recently been shown to be associated with future cardiovascular disease in healthy elderly populations and patients with documented atherosclerosis in a dose-dependent manner that possibly reflects a very early stage of chronic renal dysfunction. At the same time, local cystatin C deficiency has been demonstrated in atherosclerotic and aneurismal lesions, suggesting a protective role of cystatin C in the vessel wall, possibly in concert with TGF-beta1. Although cystatin C is not an acute phase reactant, large epidemiological studies have documented a highly significant association between serum cystatin C and mildly increased C-reactive protein (CRP) levels, the hallmark of the chronic inflammatory state associated with atherosclerosis and chronic renal failure. Since cystatin C is produced by all nucleated cells, it is unlikely that local variations in cystatin C synthesis in diseased arteries--rather than global cystatin C production and renal elimination--should determine its serum concentration. Consequently, the present review proposes microinflammation as the unifying concept for both lines of evidence.
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