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Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

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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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Depolarizing blockers are administered through intravenous injection. Succinylcholine is the most common choice of depolarizing blockers in emergency clinical practices. Although they have a rapid onset, they readily diffuse away from the motor end plate into the extracellular fluid. They are metabolized by enzymes such as liver butyrylcholinesterase and plasma pseudocholinesterases. This produces a short duration of action, typically 5-10 minutes long, unlike nondepolarizing blockers, which...
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Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

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Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
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  11. Evaluation Of Fentanyl Exposure Effects On Butyrylcholinesterase Activity As A Tool For Future On-site Detection Methods

Evaluation of Fentanyl Exposure Effects on Butyrylcholinesterase Activity as a Tool for Future On-Site Detection Methods

Vrunda Rania1, Ashley Newland1, Lenka Halámková1

  • 1Department of Environmental Toxicology, The Institute for Forensic Science, Texas Tech University, 1207 Gilbert Drive, Lubbock, Texas 79416, United States.

ACS Omega
|September 30, 2024

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Exploring Biomolecular Interaction Between the Molecular Chaperone Hsp90 and Its Client Protein Kinase Cdc37 using Field-Effect Biosensing Technology
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A High-throughput-compatible FRET-based Platform for Identification and Characterization of Botulinum Neurotoxin Light Chain Modulators
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View abstract on PubMed

Summary
This summary is machine-generated.

This study shows butyrylcholinesterase (BChE) can detect fentanyl-related substances (FRS). This enzyme inhibition interaction can be used to create a portable kit for on-site detection, aiding first responders and reducing overdoses.

Area of Science:

  • Forensic Toxicology
  • Biochemistry
  • Analytical Chemistry

Background:

  • Fentanyl and fentanyl-related substances (FRS) are major contributors to the ongoing opioid overdose crisis.
  • The high potency and widespread availability of FRS pose significant public health and safety risks.

Purpose of the Study:

  • To investigate the toxicodynamic interactions between butyrylcholinesterase (BChE) and various fentanyl analogues.
  • To explore the potential of using BChE inhibition for the development of a rapid FRS detection method.

Main Methods:

  • Utilized Ellman's assay to measure the enzymatic activity of BChE.
  • Assessed the inhibitory effects of five different fentanyl analogues on BChE function.

Main Results:

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  • All five tested fentanyl analogues significantly inhibited the enzymatic activity of BChE.
  • Demonstrated a quantifiable interaction between BChE and FRS.

    • Conclusions:

    • The observed BChE inhibition by FRS suggests a viable mechanism for detection.
    • This interaction can be leveraged to create a portable, single-use detection kit for on-site FRS identification.
    • Such a kit could enhance safety for law enforcement and first responders, potentially reducing exposure and overdose incidents.