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Related Concept Videos

Inflammatory Response01:28

Inflammatory Response

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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1&#946; in Human Monocyte-derived Dendritic Cells
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ML364 ameliorates NLRP3-induced inflammatory response.

Maoshu Zhu1, Jianhua Yu2, Yun Wang3

  • 1Central Laboratory, Xiang'an Branch, The First Affiliated Hospital of Xiamen University, The Fifth Hospital of Xiamen, Xiamen, 361101, Fujian, China.

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PubMed
Summary
This summary is machine-generated.

The deubiquitinase USP2 stabilizes NLRP3 inflammasome activation by removing ubiquitin chains. Inhibiting USP2 with ML364 suppressed inflammasome activity and reduced inflammation in disease models.

Keywords:
ML364NLRP3 inflammasomeUSP2

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Area of Science:

  • Immunology
  • Molecular Biology
  • Pharmacology

Background:

  • The NLRP3 inflammasome is crucial for innate immunity and inflammatory diseases.
  • Deubiquitinases (DUBs) are key regulators of NLRP3 stability and activation.
  • Identifying novel DUBs and inhibitors is essential for understanding NLRP3 regulation.

Purpose of the Study:

  • Investigate the role of deubiquitinase USP2 in NLRP3 inflammasome activation.
  • Evaluate the therapeutic potential of the USP2 inhibitor ML364 for inflammatory diseases.

Main Methods:

  • Utilized murine macrophage cell lines and HEK293 cells for in vitro studies.
  • Assessed inflammasome activation via genetic and pharmacological inhibition of USP2.
  • Examined in vivo efficacy of ML364 in mouse models of peritonitis and colitis.

Main Results:

  • USP2 knockdown/inhibition reduced NLRP3 inflammasome activation, caspase-1 activation, and IL-1β secretion.
  • USP2 directly interacted with NLRP3, promoting its stability by removing ubiquitin chains.
  • ML364 suppressed NLRP3 activation in vitro and ameliorated inflammatory responses in vivo.

Conclusions:

  • USP2 is a critical deubiquitinase that stabilizes NLRP3, promoting inflammasome activation.
  • USP2 inhibition with ML364 effectively suppresses inflammasome activity and inflammatory pathology.
  • USP2 and ML364 represent a potential therapeutic strategy for NLRP3-associated diseases.