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Related Concept Videos

Antidotes01:17

Antidotes

Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
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Botulism

Botulism is a life-threatening neuroparalytic condition caused by botulinum neurotoxin, which is produced by the bacterium Clostridium botulinum, a Gram-positive, spore-forming, obligate anaerobe.In adults, the toxin enters the body in different ways: in foodborne botulism, the preformed toxin is absorbed in the intestine. In wound botulism, spores grow in injured tissue and release the toxin into the blood. Infant botulism differs mechanistically from adult forms. In infants, botulism commonly...
Toxic Reactions: Overview01:26

Toxic Reactions: Overview

When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
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Acids, Bases and Neutralization Reactions03:26

Acids, Bases and Neutralization Reactions

An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
Acids, Bases and Neutralization Reactions01:27

Acids, Bases and Neutralization Reactions

Acids and bases play several important roles in biology. The pH of a biological system can significantly impact the function of biological molecules, including enzymes, proteins, and nucleic acids. For example, enzymes have optimal pH ranges for their activity, and changes in pH can denature or alter their structure, affecting their function. Acids and bases also play a crucial role in cellular signaling and communication. The pH of the extracellular fluid around cells can influence the...
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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...

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Related Experiment Video

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Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance
10:41

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

Published on: January 3, 2012

TOXIN-ANTITOXIN REACTION WITHOUT NEUTRALIZATION.

J Freund1

  • 1The Henry Phipps Institute, University of Pennsylvania, Philadelphia.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Collodion particles can bind and release toxins like diphtheria and tetanus toxins in animals. These toxin-particle interactions are specifically neutralized by corresponding antitoxins, demonstrating targeted immune responses.

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Last Updated: Jun 19, 2026

Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance
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Optimization of a Quantitative Micro-neutralization Assay

Published on: December 14, 2016

Area of Science:

  • Immunology
  • Toxicology
  • Particle Science

Background:

  • Collodion particles are known to adsorb various substances.
  • Toxins such as diphtheria, tetanus, and botulinus toxins pose significant health risks.
  • Understanding toxin-particle interactions is crucial for developing effective neutralization strategies.

Purpose of the Study:

  • To investigate the adsorption and release dynamics of diphtheria, tetanus, and botulinus toxins by collodion particles.
  • To determine the neutralizing capacity of corresponding antitoxins against toxin-adsorbed collodion particles.
  • To elucidate the specificity of antitoxin-toxin interactions on particle surfaces.

Main Methods:

  • Adsorption of diphtheria, tetanus, and botulinus toxins onto collodion particles.
  • Washing of toxin-adsorbed particles to assess toxin retention.
  • In vivo studies to evaluate toxin release in animal models.
  • Incubation of toxin-adsorbed particles with specific and non-specific antitoxins.
  • Sequential treatment of collodion particles with antitoxins and toxins to assess toxicity.

Main Results:

  • Collodion particles effectively adsorbed diphtheria, tetanus, and botulinus toxins, retaining them after washing but releasing them in vivo.
  • Adsorbed toxins were neutralized by homologous antitoxins, with no effect from heterologous serums.
  • Sequential treatment demonstrated specific binding: particles treated with tetanus antitoxin then diphtheria toxin were non-toxic, while diphtheria antitoxin then diphtheria toxin rendered them toxic. Similar specificity was observed for tetanus toxin.

Conclusions:

  • Collodion particles serve as carriers for toxins, with in vivo release occurring.
  • Antitoxins specifically neutralize adsorbed toxins, confirming the antigen-antibody interaction.
  • The study highlights the precise nature of antitoxin-toxin binding on particle surfaces, with implications for immunotherapy and diagnostic development.