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Related Concept Videos

Antidotes01:17

Antidotes

880
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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Prevention of Further Absorption of Poison01:14

Prevention of Further Absorption of Poison

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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...
1.0K
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

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The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
3.3K
Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

1.3K
Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
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EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

2.8K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
2.8K
Enhanced Elimination of Poison01:26

Enhanced Elimination of Poison

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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...
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Recent advances in supramolecular antidotes.

Hang Yin1, Xiangjun Zhang1, Jianwen Wei1

  • 1State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China.

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|January 4, 2021
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Summary

This review explores using supramolecular host molecules, like cyclodextrins and calixarenes, as novel antidotes. These macrocyclic compounds effectively neutralize poisons and harmful endogenous substances.

Keywords:
AntidotesHost-guestMacrocyclesPoisonsSupramolecular Chemistry

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Area of Science:

  • Supramolecular Chemistry
  • Toxicology
  • Medicinal Chemistry

Background:

  • Poisons, historically viewed as hazardous, are now utilized in medicine and cosmetics.
  • Antidotes are essential for counteracting poison effects, with small molecules dominating current treatments.
  • The need for advanced antidote strategies is growing due to evolving applications of toxic substances.

Purpose of the Study:

  • To review recent advancements in using host molecules for poison neutralization.
  • To highlight the potential of macrocyclic compounds as a new class of antidotes.
  • To explore the application of supramolecular chemistry in reversing toxic effects.

Main Methods:

  • Focus on encapsulation of poisons within host molecules.
  • Review literature on cyclodextrins, cucurbiturils, calixarenes, and pillararenes as hosts.
  • Analyze the impact of these supramolecular hosts on toxic compound effects.

Main Results:

  • Macrocyclic host molecules significantly impact the effects of toxic compounds.
  • Cyclodextrins, cucurbiturils, calixarenes, and pillararenes demonstrate efficacy as antidotes.
  • Supramolecular hosts can sequester endogenous harmful species, expanding therapeutic potential.

Conclusions:

  • Supramolecular host molecules represent a promising new family of antidotes.
  • Encapsulation by macrocycles offers a novel strategy to reverse or prevent poisoning.
  • This approach broadens the scope of antidotes to include endogenous toxins in various therapeutic areas.