Article Publish Status: FREE
Abstract Title:

Dietary Omega-3 Fatty Acid Dampens Allergic Rhinitis via Eosinophilic Production of the Anti-Allergic Lipid Mediator 15-Hydroxyeicosapentaenoic Acid in Mice.

Abstract Source:

Nutrients. 2019 11 22 ;11(12). Epub 2019 Nov 22. PMID: 31766714

Abstract Author(s):

Kento Sawane, Takahiro Nagatake, Koji Hosomi, So-Ichiro Hirata, Jun Adachi, Yuichi Abe, Junko Isoyama, Hidehiko Suzuki, Ayu Matsunaga, Satoshi Fukumitsu, Kazuhiko Aida, Takeshi Tomonaga, Makoto Arita, Jun Kunisawa

Article Affiliation:

Kento Sawane


The metabolism and generation of bioactive lipid mediators are key events in the exertion of the beneficial effects of dietary omega-3 fatty acids in the regulation of allergic inflammation. Here, we found that dietary linseed oil, which contains high amounts of alpha-linolenic acid (ALA) dampened allergic rhinitis through eosinophilic production of 15-hydroxyeicosapentaenoic acid (15-HEPE), a metabolite of eicosapentaenoic acid (EPA). Lipidomic analysis revealed that 15-HEPE was particularly accumulated in the nasal passage of linseed oil-fed mice after the development of allergic rhinitis with the increasing number of eosinophils. Indeed, the conversion of EPA to 15-HEPE was mediated by the 15-lipoxygenase activity of eosinophils. Intranasal injection of 15-HEPE dampened allergic symptoms by inhibiting mast cell degranulation, which was mediated by the action of peroxisome proliferator-activated receptor gamma. These findings identify 15-HEPE as a novel EPA-derived, and eosinophil-dependent anti-allergic metabolite, and provide a preventive and therapeutic strategy against allergic rhinitis.

Study Type : Animal Study

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