Author:
Lee Kyung Hee,Jang Yeo Jin,Hwang Woon Sang,Kwon Ki Sun,Lee Wha Young,Kim Jeanman,Kim Sung Phil,Friedman Mendel
Abstract
Abstract
Background
Ecklonia cava is an edible marine brown alga harvested from the ocean that is widely consumed in Asian countries as a health-promoting medicinal food The objective of the present study is to evaluate the anti-asthma mechanism of a new functional food produced by bioprocessing edible algae Ecklonia cava and shiitake Lentinula edodes mushroom mycelia and isolated fractions.
Methods
We used as series of methods, including high performance liquid chromatography, gas chromatography, cell assays, and an in vivo mouse assay to evaluate the asthma-inhibitory effect of Ecklonia cava bioprocessed (fermented) with Lentinula edodes shiitake mushroom mycelium and its isolated fractions in mast cells and in orally fed mice.
Results
The treatments inhibited the degranulation of RBL-2H3 cells and immunoglobulin E (IgE) production, suggesting anti-asthma effects in vitro. The in vitro anti-asthma effects in cells were confirmed in mice following the induction of asthma by alumina and chicken egg ovalbumin (OVA). Oral administration of the bioprocessed Ecklonia cava and purified fractions suppressed the induction of asthma and was accompanied by the inhibition of inflammation- and immune-related substances, including eotaxin; thymic stromal lymphopoietin (TSLP); OVA-specific IgE; leukotriene C4 (LTC4); prostaglandin D2 (PGD2); and vascular cell adhesion molecule-1 (VCAM-1) in bronchoalveolar lavage fluid (BALF) and other fluids and organs. Th2 cytokines were reduced and Th1 cytokines were restored in serum, suggesting the asthma-induced inhibitory effect is regulated by the balance of the Th1/Th2 immune response. Serum levels of IL-10, a regulatory T cell (Treg) cytokine, were increased, further favoring reduced inflammation. Histology of lung tissues revealed that the treatment also reversed the thickening of the airway wall and the contraction and infiltration of bronchial and blood vessels and perialveolar inflammatory cells. The bioprocessed Ecklonia cava/mushroom mycelia new functional food showed the highest inhibition as compared with commercial algae and the fractions isolated from the bioprocessed product.
Conclusions
The in vitro cell and in vivo mouse assays demonstrate the potential value of the new bioprocessed formulation as an anti-inflammatory and anti-allergic combination of natural compounds against allergic asthma and might also ameliorate allergic manifestations of foods, drugs, and viral infections.
Publisher
Springer Science and Business Media LLC
Subject
Complementary and alternative medicine
Reference39 articles.
1. Beers MH. The Merck Manual of Diagnosis and Therapy. 18th ed. Whitehouse Station: Merck Research Laboratories; 2006. https://doi.org/10.1111/j.1444-0938.2007.00102.x.
2. De La Cruz N, Hines JH, Shaw C, Appiah D. Geographic disparity in asthma hospitalizations: the role of race/ethnicity, socioeconomic status, and other factors. Cureus. 2021;13(11):e20015.
3. Jeebhay MF, Baatjies R. Occupational inhalant allergy in food handling occupations. Curr Opin Allergy Clin Immunol. 2021;22(2):64–72.
4. Pate CA, Zahran HS, Qin X, Johnson C, Hummelman E, Malilay J. Asthma surveillance - United States, 2006-2018. MMWR Surveill Summ. 2021;70(5):1–32.
5. Sharma V, Cowan DC. Obesity, inflammation, and severe asthma: an update. Curr Allergy Asthma Rep. 2021;21(12):46.
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