Glutathione Trapping
Glutathione Trapping - Related Videos
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Social Traps
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2020
Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned more cows, the larger...
11:45
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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Cited by 19 •
2017
This paper presents a microfabrication methodology for surface ion traps, as well as a detailed experimental procedure for trapping ytterbium ions in a room-temperature environment.
13:39
Optical Trapping of Nanoparticles
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Cited by 7 •
2013
The following setup approach details low power optical trapping of dielectric nanoparticles using a double-nanohole in metal film.
05:57
Dean-Stark Trap
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2023
Source: Vy M. Dong and Jan Riedel, Department of Chemistry, University of California, Irvine, CA A Dean-Stark trap is a special piece of glassware, which allows the collection of water during a reaction through an azeotropic distillation. The desire to collect water from a reaction can have various reasons. It can drive the equilibria in reactions, where water is formed as a byproduct. According to Le Chatelier's principle, a change in temperature, pressure, concentration, or volume will cause...
13:34
Gene Trapping Using Gal4 in Zebrafish
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Cited by 19 •
2013
This protocol describes the method of gene trap insertional mutagenesis using Gal4-VP16 as the primary reporter and GFP/RFP as secondary reporters in zebrafish. Approximately one in ten high-expressing F0 fish yield gene trap progeny co-expressing GFP and RFP. The screening procedure can be readily scaled to adapt to the size of the laboratory performing the insertional mutagenesis screen.
FAQs
The critical chemical event is the reaction between an electrophilic metabolite and glutathione’s thiol group. This sulfur-containing group provides the site where the reactive metabolite becomes a glutathione conjugate, producing a more stable species for analytical detection. Observing that conjugate indicates that metabolic activation generated an electrophilic intermediate capable of reacting with cellular glutathione.
Metabolic activation creates the reactive species that the assay is designed to reveal. Liver enzymes often perform this activation, converting a test compound into metabolites that may possess electrophilic reactivity. Without this enzymatic step, the relevant intermediate might not form, so including metabolic activation helps investigators examine whether the compound can follow a potentially important bioactivation pathway.
A glutathione conjugate provides an analytical signal that a reactive metabolite formed during compound metabolism. Its detection helps connect the original test compound with a possible bioactivation pathway and identifies a metabolic liability that may warrant further investigation. The result supports safety assessment, but it is interpreted as evidence of reactive metabolite formation rather than as a complete measure of cellular damage.
After metabolic activation and conjugate formation, researchers analyze the resulting mixture using liquid chromatography and mass spectrometry. Liquid chromatography separates chemical components, while mass spectrometry helps identify the glutathione-containing products. The resulting profiles allow investigators to recognize conjugates and relate their formation to particular metabolic activation pathways during analytical characterization.
In drug development, the method is useful when researchers need to characterize metabolic liabilities before advancing a therapeutic compound. Detecting glutathione conjugates can reveal that metabolism produces reactive intermediates, giving safety scientists information for pharmaceutical safety assessment and toxicology. These findings can help determine whether a compound requires additional investigation or chemical optimization.
Glutathione trapping can contribute to adverse drug reaction investigations by showing whether a medicine forms reactive metabolites through a metabolic pathway. Identifying the corresponding conjugates supplies evidence that bioactivation occurred and helps connect metabolism with a possible source of chemical reactivity. This information supports toxicological interpretation and can guide follow-up evaluation of the drug’s safety profile.