Related Experiment Video

Updated: Jun 28, 2026

Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
09:43

Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice

Published on: June 8, 2022

Quantitative assessment of serum and urinary polyclonal free light chains in patients with chronic kidney disease

Colin A Hutchison1, Stephen Harding, Pete Hewins

  • 1Renal Unit, University Hospital Birmingham, Birmingham, UK. cah692@bham.ac.uk

Clinical Journal of the American Society of Nephrology : CJASN
|October 24, 2008
PubMed
Abstract

Insights

This study reveals abnormal levels of polyclonal free light chains (FLC) in the blood and urine of patients with chronic kidney disease (CKD). These findings suggest FLC may contribute to kidney damage.

Area of Science:

  • Nephrology
  • Immunology
  • Biochemistry

Background:

  • Monoclonal free light chains (FLC) are known to cause kidney disease in plasma cell disorders.
  • The role of polyclonal FLC in chronic kidney disease (CKD) has not been previously investigated.
  • Polyclonal FLC may play a significant pathological role in CKD progression.

Purpose of the Study:

  • To investigate and characterize polyclonal FLC levels in patients with CKD.
  • To assess the relationship between polyclonal FLC and CKD severity.
  • To explore the correlation of polyclonal FLC with renal function markers and albuminuria.

Main Methods:

  • A sensitive, quantitative immunoassay was employed.
  • Serum and urinary polyclonal FLC were analyzed.
  • 688 patients with various causes of CKD were included.

Main Results:

  • Serum and urinary polyclonal FLC concentrations increased with CKD stage.
  • FLC levels strongly correlated with markers of renal function, including cystatin-C.
  • Urinary FLC concentrations correlated with serum FLC, urinary albumin-to-creatinine ratio, and increased with albuminuria severity.

Conclusions:

  • Significant abnormalities in serum and urinary polyclonal FLC were observed in CKD patients.
  • These findings establish a basis for further research into the role of polyclonal FLC in renal injury.
  • Polyclonal FLC may contribute to progressive kidney damage and systemic inflammation in kidney disease.

More Related Videos

Supervised Machine Learning for Semi-Quantification of Extracellular DNA in Glomerulonephritis09:16

Supervised Machine Learning for Semi-Quantification of Extracellular DNA in Glomerulonephritis

Published on: June 18, 2020

Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis04:37

Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis

Published on: April 25, 2025

Related Concept Videos

Chronic Kidney Disease III: Interprofessional Care01:28

Chronic Kidney Disease III: Interprofessional Care

Chronic kidney disease (CKD) requires collaborative and comprehensive management. CKD progresses through stages and can lead to end-stage kidney disease (ESKD) if untreated. Interprofessional collaboration and patient education are crucial, enabling patients to manage their health and improve their quality of life.Diagnostic approach for chronic kidney diseaseThe diagnosis of CKD primarily focuses on the glomerular filtration rate (GFR), which assesses kidney function by measuring how well...
Nephrotic Syndrome II : Assessment and Medical Management01:26

Nephrotic Syndrome II : Assessment and Medical Management

IntroductionNephrotic syndrome is a kidney disorder marked by excessive protein loss in the urine, leading to various systemic complications. This condition often results from damage to the glomeruli—the kidney's filtering units—causing proteinuria, low blood protein levels, and fluid retention. Understanding the assessment, diagnosis, and management of nephrotic syndrome is essential for effective treatment and prevention of further kidney damage.AssessmentPatient History: Document any history...
Chronic Kidney Disease I: Introduction01:25

Chronic Kidney Disease I: Introduction

Chronic Kidney Disease (CKD) arises when the kidneys progressively lose their ability to function, ultimately leading to end-stage renal disease. At this advanced stage, the kidneys can no longer filter waste or maintain essential body functions, requiring renal replacement therapy (RRT) through dialysis or a kidney transplant for survival.Early-stage chronic kidney disease and detection challengesIn CKD's early stages, symptoms often remain absent because healthy nephrons compensate for...
Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.
Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance01:25

Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance

In healthy individuals, serum creatinine levels remain stable due to a balance between its constant production—primarily from muscle metabolism—and renal excretion. Creatinine is freely filtered by the glomeruli, making it a valuable marker for estimating renal function. When the glomerular filtration rate (GFR) decreases, the kidneys can only eliminate less creatinine, causing serum levels to rise.Serum creatinine concentration is widely used to estimate creatinine clearance (Clcr), a...
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate01:25

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate

The glomerular filtration rate (GFR) is a critical indicator of kidney health, reflecting how well the kidneys filter blood. Changes in GFR can signal potential kidney impairment, necessitating accurate measurement methods to monitor kidney function effectively.Various molecules can serve as markers for GFR measurement, with the ideal marker meeting several specific criteria. It must freely filter at the glomerulus, avoid reabsorption or secretion by the renal tubules, remain unmetabolized, not...