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Related Concept Videos

Necrosis01:16

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Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
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Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
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Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics

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A tangible method to assess native ferroptosis suppressor activity.

Toshitaka Nakamura1, Junya Ito2, André Santos Dias Mourão3

  • 1Institute of Metabolism and Cell Death, Molecular Targets & Therapeutics Center, Helmholtz Zentrum München, 85764 Neuherberg, Bavaria, Germany.

Cell Reports Methods
|February 24, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to measure the activity of glutathione peroxidase 4 (GPX4), an enzyme crucial in preventing ferroptosis, a type of cell death. This technique aids in studying GPX4 mutations and inhibitors for potential disease therapies.

Keywords:
CP: Molecular biologyFSP1GPX4LC-MS/MSRSL3affinity purificationbiochemistrycell deathdrug discoveryenzyme assaylipid peroxidationpull-down assayselenocysteine

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Pharmacology

Background:

  • Ferroptosis, a regulated cell death characterized by lipid peroxidation, is implicated in numerous diseases and presents a therapeutic target.
  • Glutathione peroxidase 4 (GPX4) is a key enzyme that inhibits ferroptosis by reducing lipid hydroperoxides.
  • Assessing GPX4 activity has been challenging, hindering the development of targeted therapies.

Purpose of the Study:

  • To develop a novel, tangible method for measuring the native activity of GPX4.
  • To enable the investigation of GPX4's mutational activity and the efficacy of GPX4 inhibitors.
  • To validate the method by applying it to ferroptosis suppressor protein 1 and a new inhibitor.

Main Methods:

  • Utilized affinity-purified GPX4 to capture its native activity.
  • Applied the method to assess the activity of a GPX4 mutant (GPX4U46C) and inhibitors like RSL3.
  • Extended the application to ferroptosis suppressor protein 1 to evaluate the inhibitor WIN62577.

Main Results:

  • Successfully established a method to measure GPX4's native activity.
  • Demonstrated the method's utility in evaluating GPX4 mutants and inhibitors.
  • Validated the approach by identifying a new ferroptosis inhibitor, WIN62577, targeting ferroptosis suppressor protein 1.

Conclusions:

  • The developed method provides a valuable tool for assessing GPX4 activity and its modulation.
  • This technique facilitates the study of ferroptosis and the discovery of new therapeutic strategies.
  • Opens avenues for exploring alternative mechanisms of ferroptosis suppression.