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Related Concept Videos

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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Nephrons01:10

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The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
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Renal Corpuscle01:20

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The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
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Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF).
Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
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Renal Failure: Dose Adjustments01:11

Renal Failure: Dose Adjustments

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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...
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Drug Elimination by Renal Route: Glomerular Filtration01:17

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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 takes place. 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...
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Related Experiment Video

Updated: Jul 5, 2025

Comparative Proteomic Analysis of Whole Kidney, Medulla, and Cortical Tubules in Diabetic Pathogenesis of Kidney Injury in Mice
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Comparative Proteomic Analysis of Whole Kidney, Medulla, and Cortical Tubules in Diabetic Pathogenesis of Kidney Injury in Mice

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Circulating metabolites associated with kidney function decline and incident CKD: a multi-platform population-based

Anna C van der Burgh1, Sven Geurts1, Shahzad Ahmad1

  • 1Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands.

Clinical Kidney Journal
|January 12, 2024
PubMed
Summary

This study found numerous circulating metabolites linked to kidney function and chronic kidney disease (CKD) risk. While these metabolites may serve as biomarkers, they do not appear to be causally involved in CKD development.

Keywords:
albuminuriachronic kidney diseaseglomerular filtration ratekidney functionmetabolomics

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Area of Science:

  • Metabolomics
  • Renal Function Assessment
  • Biomarker Discovery

Background:

  • Circulating metabolites offer potential insights into kidney function and chronic kidney disease (CKD) pathophysiology.
  • Identifying novel biomarkers is crucial for early detection and management of kidney disease.

Purpose of the Study:

  • To investigate associations between circulating metabolites and kidney function.
  • To explore the potential of these metabolites as biomarkers for CKD risk.
  • To assess the causal relationship between metabolites and kidney function using Mendelian randomization.

Main Methods:

  • Utilized data from the population-based Rotterdam Study, including metabolite profiles from Nightingale and Metabolon platforms.
  • Employed linear regression, linear mixed-effects models, and Cox proportional-hazards regression to analyze associations.
  • Conducted bidirectional two-sample Mendelian randomization to infer causality.

Main Results:

  • 1381 metabolites were analyzed; a significant number showed associations with estimated glomerular filtration rate (eGFR) and urine albumin-to-creatinine ratio (ACR).
  • C-glycosyltryptophan and X-12026 demonstrated the strongest associations with CKD risk.
  • No causal links were found between the identified metabolites and kidney function, suggesting a biomarker rather than a causal role.

Conclusions:

  • Several circulating metabolites are significantly associated with kidney function and CKD risk.
  • These metabolites hold promise as potential biomarkers for kidney health.
  • The study did not establish a causal role for these metabolites in the pathophysiology of kidney function decline.