The effect of alpha linolenic acid on tracheal responsiveness, lung inflammation and immune markers in sensitized rats

Document Type: Original Article

Authors

1 Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Iran

3 Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

4 Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

Abstract

Objective(s): The effects of alpha linolenic acid (ALA) on tracheal responsiveness (TR), total protein (TP), phospholipase A2 (PLA2), immunoglobulin E (IgE), interleukin 4 (IL-4), interferon gamma (INF-γ) level and INF-γ/IL4 ratio in bronchoalveolar lavage fluid (BALF) of sensitized rats were examined.
Materials and Methods: TR to methacholine and ovalbumin (OA), BALF levels of TP, PLA2 and IgE as well as IL-4, INF-γ and INF-γ/IL4 ratio were measured in control group (non-sensitized, group C), sensitized rats to OA (group S), S groups treated with two concentrations of ALA and dexamethasone group.
Results: TR to methacholine and OA, BALF levels of TP, PLA2, IgE and IL-4 were significantly increased but BALF level of INF-γ and INF-γ/IL4 ratio decreased in group S compared to group C (PConclusion: Results showed an immune modulatory effect of the ALA that increased INF-γ, INF-γ/IL4 ratio (as an index of Th1/Th2) and decreased IL-4 in sensitized rats. ALA also showed preventive effect on inflammatory markers and tracheal responsiveness in sensitized animals comparable to the effect of dexamethasone.

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Main Subjects


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