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PM2.5 induces lung inflammation through ANGPTL4.

Yeak-Wun Quek1, Yu-Ting Kang2, Hsu Chih Huang3

  • 1Institute of Medicine, Chung-Shan Medical University, Taichung 402, Taiwan; Division of thoracic surgery, Department of surgery, Chung Shan medical university hospital, Taiwan; Division of Allergy, Department of Pediatrics, Chung Shan Medical University Hospital, Taichung 402, Taiwan.

Mutation Research
|November 14, 2024
PubMed
Summary

Fine particulate matter (PM2.5) exposure increases Angiopoietin-like protein 4 (ANGPTL4), promoting lung inflammation. Curcumin effectively inhibits this PM2.5-induced ANGPTL4 pathway, suggesting its potential for lung cancer chemoprevention.

Keywords:
Angiopoietin-like protein 4CurcuminFine particulate matterLung inflammationPM(2.5)

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Area of Science:

  • Environmental Health
  • Molecular Biology
  • Pharmacology

Background:

  • Fine particulate matter (PM2.5) is a significant air pollutant linked to reduced lung function and chronic lung diseases.
  • Angiopoietin-like protein 4 (ANGPTL4) is a cytokine involved in inflammation, angiogenesis, and metastasis.
  • Curcumin, derived from turmeric, exhibits potent anti-inflammatory, antioxidant, and anticancer properties.

Purpose of the Study:

  • To investigate the role of ANGPTL4 in PM2.5-induced lung inflammation and carcinogenesis.
  • To evaluate the effect of curcumin on ANGPTL4 expression and its chemopreventive potential against lung cancer.

Main Methods:

  • Protein array analysis to identify key proinflammatory cytokines.
  • Quantitative PCR (qPCR) to confirm PM2.5-induced expression of specific inflammatory markers (CXCL1, CXCL5, IL-1α, IL-1β, MIP-3α).
  • Assessment of curcumin's impact on ANGPTL4 and NFκB signaling pathways, including ANGPTL4 silencing via shRNA.

Main Results:

  • PM2.5 exposure significantly increased the expression of multiple proinflammatory and fibrosis-associated proteins, including ANGPTL4.
  • Curcumin treatment inhibited PM2.5-induced ANGPTL4 expression and the IκB-α-dependent inflammatory pathway.
  • ANGPTL4 silencing reversed the effects of PM2.5 on IκB-α and MIP-3α expression.

Conclusions:

  • Elevated ANGPTL4 expression is a potential mechanism linking PM2.5 exposure to lung inflammation progression.
  • Curcumin demonstrates significant anti-inflammatory effects by modulating the ANGPTL4 pathway.
  • Curcumin shows promise as a chemopreventive agent for lung cancer, offering therapeutic potential in anti-inflammatory treatments.