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8-(Tosylamino)quinoline inhibits macrophage-mediated inflammation by suppressing NF-κB signaling

Yongwoo Jung1, Se Eun Byeon, Dae Sung Yoo

  • 1Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.

Acta Pharmacologica Sinica
|July 17, 2012
PubMed
Abstract

Insights

8-(tosylamino)quinoline (8-TQ) significantly suppresses macrophage inflammation by inhibiting the Akt/NF-κB pathway. This novel compound shows potential as an anti-inflammatory drug for various diseases.

Area of Science:

  • Immunology
  • Pharmacology
  • Molecular Biology

Background:

  • Macrophage-mediated inflammation is implicated in diseases like cancer, diabetes, atherosclerosis, and septic shock.
  • Identifying novel compounds to modulate inflammatory responses is crucial for therapeutic development.

Purpose of the Study:

  • To characterize new compounds for their ability to suppress macrophage-mediated inflammation.
  • To investigate the underlying mechanisms of anti-inflammatory activity.

Main Methods:

  • Assessed anti-inflammatory activity in lipopolysaccharide (LPS)-activated RAW264.7 cells and mouse peritoneal macrophages.
  • Investigated mechanisms by measuring transcription factor activation and kinase activities.
  • Evaluated in vivo efficacy in LPS-induced hepatitis and HCl/EtOH-induced gastritis mouse models.

Main Results:

  • 8-(tosylamino)quinoline (8-TQ) demonstrated potent suppression of nitric oxide, TNF-α, and PGE(2) production (IC(50)=1-5 μmol/L).
  • 8-TQ dose-dependently inhibited pro-inflammatory gene expression (iNOS, COX-2, TNF-α, IL-1β, IL-6) at the transcriptional level.
  • 8-TQ suppressed Akt and NF-κB activation, along with upstream signaling molecules IκBα and IKK.
  • In vivo, 8-TQ alleviated LPS-induced hepatitis and gastritis symptoms.

Conclusions:

  • 8-TQ exhibits significant anti-inflammatory effects via Akt/NF-κB pathway inhibition.
  • 8-TQ demonstrates therapeutic potential as a novel anti-inflammatory agent.

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