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Related Concept Videos

Bacterial Toxins01:12

Bacterial Toxins

Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
Prevention of Further Absorption of Poison01:14

Prevention of Further Absorption of Poison

In cases of acute poisoning, the primary objective is to prevent further absorption of the toxic substance into the body. Immediate interventions using various decontamination techniques targeting the gastrointestinal (GI) tract can achieve this. Decontamination is crucial to prevent poison from entering the systemic circulation, which involves washing affected areas with water and mild soap and removing contaminated clothing. Once external decontamination is done, attention must be turned to...
Drug Distribution: Plasma Protein Binding01:29

Drug Distribution: Plasma Protein Binding

Drugs predominantly attach to plasma proteins, with only a small percentage remaining unbound. The unbound portion can be calculated as one minus the bound fraction. Acidic drugs form large, inactive complexes by reversibly binding to plasma albumin, which prevents them from diffusing across biological barriers. These drug-protein complexes act as reservoirs for the drugs. As the concentration of unbound drugs decreases, these complexes quickly dissociate to release the free drug, maintaining...
Pharmaceutical Poisoning: Treatment Strategies01:26

Pharmaceutical Poisoning: Treatment Strategies

Treatment strategies for poisoning are a critical aspect of emergency medicine, focusing on preventing the absorption of toxins and enhancing their elimination. When a poisoning incident occurs, the first response is to halt exposure and decontaminate the patient, particularly through gastrointestinal (GI) methods if the poison was ingested.Gastrointestinal Decontamination Techniques:Activated charcoal is the cornerstone of GI decontamination. It works through adsorption, binding the toxin to...
Enhanced Elimination of Poison01:26

Enhanced Elimination of Poison

Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
Drug Distribution: Tissue Binding01:21

Drug Distribution: Tissue Binding

Upon entering the systemic circulation, drugs can distribute into the interstitial and intracellular fluid of various tissue cells. This distribution is facilitated by the binding of drugs to different cellular components within tissues, which may lead to drug accumulation in specific areas. Drugs bound to tissue components serve as reservoirs that release free drugs back into the system, prolonging the drug's overall action. However, this accumulation can also result in local toxicity.
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Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays
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Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays

Published on: March 3, 2014

Protein-bound toxins--update 2009.

Noémie Jourde-Chiche1, Laetitia Dou, Claire Cerini

  • 1Université Aix-Marseille and INSERM U608, Marseille, France.

Seminars in Dialysis
|August 28, 2009
PubMed
Summary

Protein-bound uremic toxins are difficult to remove with standard dialysis. New strategies like daily or long hemodialysis may improve the removal of these harmful compounds in chronic kidney disease patients.

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Last Updated: Jun 20, 2026

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Published on: March 3, 2014

Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance
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Area of Science:

  • Nephrology
  • Toxicology
  • Biochemistry

Background:

  • Protein-bound uremic retention solutes are challenging to clear via dialysis.
  • These solutes are implicated in vascular complications of chronic kidney disease (CKD).
  • Conventional hemodialysis (HD) and hemodiafiltration show limited efficacy due to the protein-binding characteristic.

Purpose of the Study:

  • To review the challenges in removing protein-bound uremic solutes.
  • To explore strategies for enhancing the removal of these difficult-to-clear toxins.
  • To discuss current and future approaches for improving solute removal in CKD.

Main Methods:

  • Literature review of protein-bound uremic solutes and their removal by dialysis.
  • Analysis of factors influencing solute dissociation from binding proteins.
  • Evaluation of existing and potential therapeutic strategies for enhanced toxin clearance.

Main Results:

  • A list of 28 protein-bound solutes identified, including advanced glycation end products, phenols, indoles, and others.
  • Low removal rates by conventional HD due to limited diffusion of bound solutes.
  • Improved but still limited convectional clearance in hemodiafiltration.
  • Potential for enhanced removal by increasing dialysate flow, KoA, or using sorbents.
  • Daily and long HD show promise for better removal by improving compartment equilibration.

Conclusions:

  • Protein-bound uremic solutes pose a significant challenge in CKD management.
  • Strategies to enhance solute dissociation or utilize extended dialysis sessions are crucial.
  • Further research into specific adsorbents could offer future therapeutic options.