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BioMed Research International
Volume 2013 (2013), Article ID 523761, 15 pages
Research Article

Antileukotriene Reverts the Early Effects of Inflammatory Response of Distal Parenchyma in Experimental Chronic Allergic Inflammation

1Medicine Department, School of Medicine, University of São Paulo(USP), 01246-903 São Paulo, SP, Brazil
2Biological Science Department, Universidade Federal de São Paulo(UNIFESP), 09972-270 Diadema, SP, Brazil

Received 2 May 2013; Revised 23 July 2013; Accepted 24 July 2013

Academic Editor: Alexandre Paula Rogerio

Copyright © 2013 Nathália Brandão Gobbato et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Aims. Compare the effects of montelukast or dexamethasone in distal lung parenchyma and airway walls of guinea pigs (GP) with chronic allergic inflammation. Methods. GP have inhaled ovalbumin (OVA group-2x/week/4weeks). After the 4th inhalation, GP were treated with montelukast or dexamethasone. After 72 hours of the 7th inhalation, GP were anesthetised, and lungs were removed and submitted to histopathological evaluation. Results. Montelukast and dexamethasone treatments reduced the number of eosinophils in airway wall and distal lung parenchyma compared to OVA group ( ). On distal parenchyma, both treatments were effective in reducing RANTES, NF-κB, and fibronectin positive cells compared to OVA group ( ). Montelukast was more effective in reducing eotaxin positive cells on distal parenchyma compared to dexamethasone treatment ( ), while there was a more expressive reduction of IGF-I positive cells in OVA-D group ( ). On airway walls, montelukast and dexamethasone were effective in reducing IGF-I, RANTES, and fibronectin positive cells compared to OVA group ( ). Dexamethasone was more effective in reducing the number of eotaxin and NF-κB positive cells than Montelukast ( ). Conclusions. In this animal model, both treatments were effective in modulating allergic inflammation and remodeling distal lung parenchyma and airway wall, contributing to a better control of the inflammatory response.