[논문]Anti-allergic effect of inotodiol, a lanostane triterpenoid from Chaga mushroom, via selective inhibition of mast cell function

Nguyen, Thi Minh Nguyet; Le, Hong Son; Le, Ba Vinh; Kim, Young Ho; Hwang, Inkyu

doi:10.1016/j.intimp.2020.106244

[해외논문] Anti-allergic effect of inotodiol, a lanostane triterpenoid from Chaga mushroom, via selective inhibition of mast cell function

International immunopharmacology, v.81, 2020년, pp.106244 -

Nguyen, Thi Minh Nguyet (Immunology and Immunopharmacology Laboratory, College of Pharmacy and Pharmaceutical Science, Chungnam National University) , Le, Hong Son (Immunology and Immunopharmacology Laboratory, College of Pharmacy and Pharmaceutical Science, Chungnam National University) , Le, Ba Vinh (Natural Products Laboratory, College of Pharmacy and Pharmaceutical Science, Chungnam National University) , Kim, Young Ho (Natural Products Laboratory, College of Pharmacy and Pharmaceutical Science, Chungnam National University) , Hwang, Inkyu (Immunology and Immunopharmacology Laboratory, College of Pharmacy and Pharmaceutical Science, Chungnam National University)

Abstract ▼ AI-Helper

Abstract Inotodiol is a lanostane triterpenoid found only in Chaga mushroom. In the previous study investigating anti-allergic effects of fractionated Chaga mushroom extracts, we have found evidence that purified inotodiol holds an activity to suppress the mast cell function in vivo. To address the therapeutic relevance of the finding, in this study, we investigated whether inotodiol could also alleviate allergy symptoms observed in a chicken ovalbumin (cOVA)-induced mouse model of food allergy. Like the crude 70% ethanol extract of Chaga mushroom (320 mg/kg), oral administration of inotodiol (20 mg/kg), regardless of whether that was for preventive or treatment purpose, resulted in a significant improvement in allergic symptoms and inflammatory lesions in the small intestine appearing after repeated oral challenge with cOVA. Despite the results that inotodiol (20 mg/kg) and the Chaga mushroom extract (320 mg/kg) took effect to a similar extent, immunological mechanisms underlying those effects were found to be distinct from each other. That is, the results obtained from several in vivo assays, including mast cell-mediated passive systemic anaphylaxis, activation/proliferation of adoptively transferred antigen-specific T cells and immunoglobulin (IgG1, IgE, IgA) production by antigen-specific B cells, illustrated that inotodiol selectively inhibited the mast cell function without having any noticeable effect on other immune responses while the crude Chaga mushroom extract indiscriminately suppressed diverse immune responses. The strong anti-allergic activity of inotodiol, along with its remarkable selectivity to mast cell, makes it an excellent therapeutic candidate for food allergy with both high efficacy and outstanding safety. Highlights Pure inotodiol (>96.5%) isolated from Chaga mushroom prevents onset of food allergy. Inotodiol, a lanostane triterpene, prevents anaphylaxis caused by passively transferred IgE. Inotodiol exerts a mast cell stabilizing activity in vivo that is testified by an ex vivo assay. Inotodiol selectively suppresses immunoreactivity of mast cells but not of T and B cells. Inotodiol prevents recurrence of food allergy symptoms in a mouse model of food allergy.

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DOI : 10.1016/j.intimp.2020.106244
Elsevier : 저널 > 논문

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