Inflammation Research

, Volume 56, Issue 10, pp 402–408

Anti-inflammatory activity of quercetin and isoquercitrin in experimental murine allergic asthma

  • A. P. Rogerio
  • A. Kanashiro
  • C. Fontanari
  • E. V. G. da Silva
  • Y. M. Lucisano-Valim
  • E. G. Soares
  • L. H. Faccioli
Article

DOI: 10.1007/s00011-007-7005-6

Cite this article as:
Rogerio, A.P., Kanashiro, A., Fontanari, C. et al. Inflamm. res. (2007) 56: 402. doi:10.1007/s00011-007-7005-6
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Abstract.

Objective:

Eosinophils and cytokines are implicated in the pathogenesis of allergic diseases. In the present study, we investigate the anti-inflammatory effect of quercetin and isoquercitrin in a murine model of asthma.

Methods:

BALB/c mice were immunized (ovalbumin/aluminum hydroxide, s. c.), followed by two intranasal ovalbumin challenges. From day 18 to day 22 after the first immunization, the mice received daily gavages of isoquercitrin (15 mg/kg) or quercetin (10 mg/kg). Dexamethasone (1 mg/kg, s. c.) was administered as a positive control. Leucocytes were analyzed in bronchoalveolar lavage fluid (BALF), blood and pulmonary parenchyma at 24 h after the last ovalbumin challenge. Interleukin-5 (IL-5) was analyzed in BALF and lung homogenates.

Results:

In animals receiving isoquercitrin or quercetin, eosinophil counts were lower in the BALF, blood and lung parenchyma. Neutrophil counts in blood and IL-5 levels in lung homogenate were lower only in isoquercitrin-treated mice. No alterations in mononuclear cell numbers were observed.

Conclusion:

Quercetin and isoquercitrin are effective eosinophilic inflammation suppressors, suggesting a potential for treating allergies.

Keywords:

QuercetinIsoquercitrinEosinophilsMurine model of asthma

Copyright information

© Birkhaueser 2007

Authors and Affiliations

  • A. P. Rogerio
    • 1
  • A. Kanashiro
    • 2
  • C. Fontanari
    • 1
  • E. V. G. da Silva
    • 1
  • Y. M. Lucisano-Valim
    • 2
  • E. G. Soares
    • 3
  • L. H. Faccioli
    • 1
  1. 1.Departamento de Análises ClínicasToxicológicas e BromatológicasRibeirão PretoBrasil
  2. 2.Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão PretoUniversidade de São PauloRibeirão PretoBrasil
  3. 3.Departamento de Patologia, Faculdade de Medicina de Ribeirão PretoUniversidade de São PauloRibeirão PretoBrasil