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Related Concept Videos

Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

548
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.
548
Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration01:28

Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration

285
Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area.
285
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

420
Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
420
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate01:25

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate

81
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...
81
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

317
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...
317
Renal Failure: Dose Adjustments01:11

Renal Failure: Dose Adjustments

547
In patients with renal impairment, drugs undergo significant changes in their pharmacokinetics, which require dosage adjustments to ensure safe and effective therapy.
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
547

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Related Experiment Video

Updated: Mar 7, 2026

Quantitative Real-Time Polymerase Chain Reaction Evaluation of MicroRNA Expression in Kidney and Serum of Mice with Age-Dependent Renal Impairment
06:48

Quantitative Real-Time Polymerase Chain Reaction Evaluation of MicroRNA Expression in Kidney and Serum of Mice with Age-Dependent Renal Impairment

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Serum iron level and kidney function: a Mendelian randomization study.

Fabiola Del Greco M1, Luisa Foco1, Irene Pichler1

  • 1Center for Biomedicine, European Academy of Bolzano/Bozen (EURAC), affiliated with the University of Lübeck, Via Galvani 31, Bolzano, Italy.

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|February 11, 2017
PubMed
Summary
This summary is machine-generated.

Higher iron levels appear to protect kidney function in the general population. This Mendelian randomization study suggests a beneficial causal link between iron status and estimated glomerular filtration rate (eGFR).

Keywords:
chronic kidney diseaseferritinglomerular filtration rateironkidney functionMendelian randomization

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Area of Science:

  • Nephrology
  • Genetics
  • Metabolic Health

Background:

  • Iron deficiency is common in chronic kidney disease (CKD), but its direct impact on kidney function remains debated.
  • Epidemiological studies show conflicting results regarding iron's protective or detrimental role in kidney health.
  • Mendelian randomization (MR) offers a method to assess causal effects, overcoming confounding in observational studies.

Purpose of the Study:

  • To investigate the causal effect of serum iron levels on estimated glomerular filtration rate (eGFR) in the general population.
  • To examine the relationship between iron stores (ferritin) and kidney function using genetic variants.
  • To explore the potential protective role of iron in kidney health.

Main Methods:

  • A Mendelian randomization (MR) study design was employed.
  • Genetic variants associated with serum iron and ferritin levels were used as instrumental variables.
  • Data from large genome-wide meta-analyses (N=48,978 and N=74,354) were utilized to assess associations with eGFR.

Main Results:

  • A 1.3% increase in eGFR per standard deviation increase in iron was observed (P = 0.004).
  • Results for ferritin were consistent with those for serum iron, suggesting a similar protective trend.
  • Secondary analyses for CKD showed no significant associations, limited by low statistical power.

Conclusions:

  • The study suggests a protective causal effect of iron on kidney function in the general population.
  • Further research is needed to confirm this association in diverse populations and elucidate underlying mechanisms.
  • Investigating iron's role in individuals at higher risk for CKD is warranted.