Is cystatin C or cystatin 3 used as a biomarker of kidney function?
['to explore the effect of ageing on renal function with cystatin C as the marker of glomerular filtration rate (GFR) in the general population without vascular disease or diabetes.', 'Cystatin C, a more specific kidney function biomarker, was also elevated at 24 h after CLP.', 'This study evaluated FGF-23 as well as traditional markers of kidney disease, namely urine albumin-to-creatinine ratio (UACR) and creatinine-cystatin C estimated GFR (eGFRCrCyC), as risk factors for AKI in elderly individuals. ', 'he primary predictor was estimated GFR (eGFR) calculated using serum cystatin C (eGFR(cys)).', 'A number of recent reports have suggested that the cystatin C/creatinine (CysC/Cr) ratio might be a useful biomarker of renal function in pediatric patients.', 'The CKD-EPI equation using cystatin C was the most precise method of renal function evaluation in patients with neurogenic bladder.', 'Serum cystatin C (CysC) is an endogenous marker of kidney function.', 'The urinary content of CysC reflects tubular epithelial dysfunction whereas that of NGAL also characterizes tubular atrophy.', 'Estimated kidney function based on serum cystatin C ', ': Several formulas for glomerular filtration rate (GFR) estimation, based on serum creatinine or cystatin C, have been proposed. ', 'he highest and lowest eGFR levels corresponded to the cystatin C-based and MDRD-4 equations, respectively. ', 'The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) recently proposed an equation to estimate GFR in subjects without cirrhosis using both serum creatinine and cystatin C levels.', 'Emerging evidence has shown that cystatin C may improve classification of glomerular filtration rate for defining chronic kidney disease in certain clinical populations and assist in understanding the complications of chronic kidney disease', 'Beta-trace protein (BTP) and cystatin C (CysC) are novel biomarkers of renal function. ', 'Cystatin C could improve chronic kidney disease (CKD) classification in HIV-infected women relative to serum creatinine.', ' Iohexol clearance and cystatin C formulae identify a greater proportion of patients with a GFR <60 mL/min/1.73 m(2), which also predicts the development of AKI.', ' Cystatin C was recently reported to be an endogenous surrogate of kidney function, and a high level of cystatin C is reported to be a strong predictor of CVD;', 'Studies that have simultaneously compared measured GFR and estimated GFR (using endogenous filtration markers such as creatinine, or newer ones such as cystatin C or β-trace protein)']
['Yes, cystatin C (CysC) is a  novel biomarker of renal function.']
['yes']