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Updated: Feb 12, 2026

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
13:21

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps

Published on: August 18, 2012

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The nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide dampens lipopolysaccharide-induced transcriptomic changes in

M D Muñoz1,2, M C Della Vedova1,2, P R Bushel3

  • 1Laboratory of Experimental and Translational Medicine, IMIBIO-SL-School of Chemistry, Biochemistry and Pharmacy, National University of San Luis-CONICET, San Luis, 5700, San Luis, Argentina.

Inflammation Research : Official Journal of the European Histamine Research Society ... [Et Al.]
|March 29, 2018
PubMed
Abstract

Insights

The spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO) alters macrophage gene expression, downregulating immune responses. DMPO also dampens lipopolysaccharide (LPS)-induced inflammation, suggesting potential for anti-inflammatory drug development.

Area of Science:

  • Immunology and Molecular Biology
  • Pharmacology and Drug Discovery

Background:

  • The M1-like inflammatory macrophage phenotype contributes to tissue damage in chronic inflammatory diseases.
  • Previous research indicated that 5,5-dimethyl-1-pyrroline N-oxide (DMPO) can reduce lipopolysaccharide (LPS)-induced inflammatory priming in RAW 264.7 cells.

Purpose of the Study:

  • To investigate if DMPO alone induces transcriptomic changes in macrophages.
  • To determine if these DMPO-induced changes can prevent LPS-induced macrophage activation.

Main Methods:

  • Transcriptomic and bioinformatics analysis of RAW 264.7 cells treated with or without LPS and DMPO.
  • Identification of differentially expressed genes (DEGs) and enriched gene ontology terms.
  • Validation of transcriptomic changes using Nanostring technology.

Main Results:

  • DMPO treatment alone resulted in 79 differentially expressed genes, primarily downregulating immune system processes.
  • Functional analysis suggested DMPO impacts interferon-response factor 7 and toll-like receptor pathways.
  • DMPO significantly dampened the LPS-induced inflammatory transcriptomic profile in macrophages.

Conclusions:

  • DMPO independently influences gene expression related to immune system regulation.
  • DMPO effectively mitigates LPS-triggered inflammatory signaling via MyD88- and TRIF-dependent pathways.
  • DMPO serves as a potential structural basis for developing novel mechanism-based anti-inflammatory drugs.
Keywords:
DMPOInflammationLipopolysaccharideMacrophageTranscriptomics

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