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The Importance of Correct Protein Concentration for Kinetics and Affinity Determination in Structure-function Analysis
19:16

The Importance of Correct Protein Concentration for Kinetics and Affinity Determination in Structure-function Analysis

Published on: March 17, 2010

Association of cystatin C with adverse outcomes

Magdalena Madero1, Mark J Sarnak

  • 1Division of Nephrology, Instituto Nacional de Cardiología Ignacio Chávez, México City, Mexico.

Current Opinion in Nephrology and Hypertension
|April 18, 2009
PubMed

Insights

Cystatin C effectively identifies mild kidney disease risks for mortality and cardiovascular disease (CVD). This marker shows associations even within normal kidney function ranges, aiding in risk assessment for older adults.

Area of Science:

  • Biomarkers in Nephrology
  • Cardiovascular Risk Assessment
  • Geriatric Medicine

Background:

  • Cystatin C is a protein produced by all nucleated cells, influenced by factors beyond kidney function.
  • Creatinine is a commonly used marker for estimating glomerular filtration rate (GFR), but its accuracy can be affected by muscle mass.
  • Understanding the determinants and clinical utility of cystatin C is crucial for accurate risk stratification.

Purpose of the Study:

  • To review recent studies on cystatin C determinants.
  • To analyze the relationship between cystatin C and mortality, cardiovascular disease (CVD), and noncardiovascular outcomes.
  • To compare the predictive value of cystatin C with creatinine.

Main Methods:

  • Review of recent epidemiological and cohort studies.
  • Analysis of associations between cystatin C levels and demographic characteristics.
  • Correlation of cystatin C with measured glomerular filtration rate (GFR).

Main Results:

  • Cystatin C is associated with demographic factors, independent of GFR, though to a lesser extent than creatinine.
  • In chronic kidney disease (CKD) patients, cystatin C strongly correlates inversely with GFR, confirming its role as a kidney function measure.
  • Cohort studies, especially in older adults, show cystatin C linearly associates with mortality and CVD/non-CVD outcomes, unlike creatinine which is more specific to advanced kidney disease.

Conclusions:

  • Cystatin C effectively identifies increased risk of mortality and non-CVD outcomes associated with mild kidney disease.
  • Changes in kidney function, as measured by cystatin C even within normal ranges, predict subsequent CVD and all-cause mortality in older adults.
  • Future research should explore cystatin C's potential to enhance medical decision-making and improve patient outcomes.
Abstract

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