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Related Concept Videos

Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

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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.
38
Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

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Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
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Renal Regulation of Acid-Base Balance01:29

Renal Regulation of Acid-Base Balance

638
Metabolic reactions in the body produce nonvolatile acids, such as sulfuric acid, which generate an acid load of approximately 1 mEq of H+ per kilogram of body weight daily. Excreting H+ in the urine is essential to balance this acid load.
In the kidneys, cells within the proximal convoluted tubules (PCT) and the collecting ducts secrete hydrogen ions (H+) into the tubular fluid. Specifically, in the PCT, Na+/H+ antiporters secrete H+ while reabsorbing Na+.
However, the intercalated cells in...
638
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

55
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...
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Renal Drug Excretion: Glomerular Filtration01:02

Renal Drug Excretion: Glomerular Filtration

463
The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production occurs. A nephron has two main components: a renal corpuscle and a renal tubule.
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
463
Kidney Transplant I: Introduction01:28

Kidney Transplant I: Introduction

50
A kidney transplant is a surgical approach that involves replacing a non-functioning kidney with a healthy one from a donor. This procedure is often a treatment option for end-stage renal disease (ESRD) patients. The method requires careful recipient selection, including evaluating various medical and psychosocial factors. These criteria vary between transplant centers but generally include assessments of the patient's overall health, adherence to medical recommendations, and lifestyle...
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Updated: Aug 31, 2025

Transdermal Measurement of Glomerular Filtration Rate in Mice
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Serum bilirubin and kidney function: a Mendelian randomization study.

Sehoon Park1, Soojin Lee2, Yaerim Kim3

  • 1Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea.

Clinical Kidney Journal
|August 25, 2022
PubMed
Summary

Higher serum bilirubin levels may protect against chronic kidney disease (CKD). This Mendelian randomization study found a genetic predisposition for increased bilirubin was linked to better kidney function and lower CKD risk.

Keywords:
Mendelian randomizationbilirubinchronic kidney diseaseepidemiology

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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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Area of Science:

  • Genetics
  • Nephrology
  • Biochemistry

Background:

  • Investigating the causal relationship between serum bilirubin and chronic kidney disease (CKD) risk is crucial.
  • Previous studies suggest a link, but causal effects remain unclear.

Purpose of the Study:

  • To determine the causal effect of serum bilirubin levels on the risk of developing CKD.
  • To utilize Mendelian randomization (MR) to assess this association.

Main Methods:

  • A single-nucleotide polymorphism (SNP), rs4149056 in the SLCO1B1 gene, was used as a genetic instrument for serum bilirubin levels.
  • Mendelian randomization analysis was performed on 337,129 individuals from the UK Biobank, with additional two-sample MR using CKDGen data.

Main Results:

  • Genetic predisposition for higher serum bilirubin levels was associated with better kidney function (eGFR) in UK Biobank data.
  • In summary-level MR, genetically predicted higher total and direct bilirubin levels were significantly associated with a lower risk of CKD (OR 0.931 and 0.910, respectively).

Conclusions:

  • Higher serum bilirubin levels appear to have a causal protective effect against kidney function impairment.
  • These findings suggest a potential therapeutic role for bilirubin in managing or preventing CKD.