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Protective Effect of Curcumin on Pulmonary and Cardiovascular Effects Induced by Repeated Exposure to Diesel Exhaust Particles in Mice

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  • Abderrahim Nemmar
  • Deepa Subramaniyan
  • Badreldin H Ali

Abstract

Particulate air pollution has been associated with increased risk of cardiopulmonary diseases. However, the underlying mechanisms are not fully understood. We have previously demonstrated that single dose exposure to diesel exhaust particle (DEP) causes lung inflammation and peripheral thrombotic events. Here, we exposed mice with repeated doses of DEP (15µg/animal) every 2nd day for 6 days (a total of 4 exposures), and measured several cardiopulmonary endpoints 48 h after the end of the treatments. Moreover, the potential protective effect of curcumin (the yellow pigment isolated from turmeric) on DEP-induced cardiopulmonary toxicity was assessed. DEP exposure increased macrophage and neutrophil numbers, tumor necrosis factor α (TNF α) in the bronchoalveolar lavage (BAL) fluid, and enhanced airway resistance to methacoline measured invasively using Flexivent. DEP also significantly increased plasma C-reactive protein (CRP) and TNF α concentrations, systolic blood pressure (SBP) as well as the pial arteriolar thrombosis. It also significantly enhanced the plasma D-dimer and plasminogen activator inhibitor-1 (PAI-1). Pretreatment with curcumin by oral gavage (45 mg/kg) 1h before exposure to DEP significantly prevented the influx of inflammatory cells and the increase of TNF α in BAL, and the increased airway resistance caused by DEP. Likewise, curcumin prevented the increase of SBP, CRP, TNF α, D-dimer and PAI-1. The thrombosis was partially but significantly mitigated. In conclusion, repeated exposure to DEP induced lung and systemic inflammation characterized by TNFα release, increased SBP, and accelerated coagulation. Our findings indicate that curcumin is a potent anti-inflammatory agent that prevents the release of TNFα and protects against the pulmonary and cardiovascular effects of DEP.

Suggested Citation

  • Abderrahim Nemmar & Deepa Subramaniyan & Badreldin H Ali, 2012. "Protective Effect of Curcumin on Pulmonary and Cardiovascular Effects Induced by Repeated Exposure to Diesel Exhaust Particles in Mice," PLOS ONE, Public Library of Science, vol. 7(6), pages 1-9, June.
  • Handle: RePEc:plo:pone00:0039554
    DOI: 10.1371/journal.pone.0039554
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    1. Peter Libby & Paul M Ridker & Göran K. Hansson, 2011. "Progress and challenges in translating the biology of atherosclerosis," Nature, Nature, vol. 473(7347), pages 317-325, May.
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    1. Sasinee Hantrakool & Sirinart Kumfu & Siriporn C. Chattipakorn & Nipon Chattipakorn, 2022. "Effects of Particulate Matter on Inflammation and Thrombosis: Past Evidence for Future Prevention," IJERPH, MDPI, vol. 19(14), pages 1-26, July.

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