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Cystatin C or cystatin 3 (formerly gamma trace, ... It is a more expensive test than serum creatinine (around $2 or $3, compared to $0.02 to $0.15), ...
The functions of the kidney include maintenance of acid-base balance; regulation of fluid balance; regulation of sodium, potassium, and other electrolytes; clearance of toxins; absorption of glucose, amino acids, and other small molecules; regulation of blood pressure; production of various hormones, such as erythropoietin; and activation of vitamin D.
One of these is cystatin C, a ubiquitous protein secreted by most cells in the body (it is an inhibitor of cysteine protease). [14] Cystatin C is freely filtered at the glomerulus. After filtration, Cystatin C is reabsorbed and catabolized by the tubular epithelial cells, with only small amounts excreted in the urine.
Cystatin C is a protein that is freely filtered in the glomeruli before it is reabsorbed and catabolized in the renal tubular cells. Its serum level is independent of muscle mass, making more accurate at estimating GFR than creatinine serum levels.
The test is therefore unsuitable for detecting early-stage kidney disease. A better estimate of kidney function is given by calculating the estimated glomerular filtration rate (eGFR). eGFR can be calculated without a 24-hour urine collection, using serum creatinine concentration and some or all of the following variables: sex, age, and weight ...
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This comparative procedure allowed the definition of a new type of kidney disorder characterized by a greater reduction of renal clearances of larger molecules (e.g. cystatin C, 13,343Da) than of smaller ones (e.g. creatinine, 113Da) and identified by a greater reduction of the cystatin C-based GFR-estimate (eGFR cystatin C) than that based ...
Myth #3: Vitamin C can prevent a cold. Pharmacy and grocery store shelves are packed with vitamin C supplements that heavily imply or even clearly state that they’ll help prevent a cold. But the ...
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