Anti-IgE effect of small-molecule-compound arctigenin on food allergy in association with a distinct transcriptome profile.
Clin Exp Allergy
; 52(2): 250-264, 2022 02.
Article
in En
| MEDLINE
| ID: mdl-34757674
ABSTRACT
BACKGROUND:
Excessive production of IgE plays a major role in the pathology of food allergy. In an attempt to identify anti-IgE natural products, Arctium Lappa was one of the most effective herbs among approximately 300 screened medicinal herbs. However, little is known about its anti-IgE compounds.OBJECTIVE:
To identify compounds from Arctium Lappa for targeted therapy on IgE production and explore their underlying mechanisms.METHODS:
Liquid-liquid extraction and column chromatographic methods were used to purify the compounds. IgE inhibitory effects were determined on IgE-producing human myeloma U266 cells, peanut-allergic murine model and PBMCs from food-allergic patients. Genes involved in IgE inhibition in PBMCs were studied by RNA sequencing.RESULTS:
The main compounds isolated were identified as arctiin and arctigenin. Both compounds significantly inhibited IgE production in U266 cells, with arctigenin the most potent (IC50=5.09µg/mL). Arctigenin (at a dose of 13 mg/kg) markedly reduced peanut-specific IgE levels, blocked hypothermia and histamine release in a peanut-allergic mouse model. Arctigenin also significantly reduced IgE production and Th2 cytokines (IL-5, IL-13) by PBMCs. We found 479 differentially expressed genes in PBMCs with arctigenin treatment (p < .001 and fold-change ≥1.5), involving 24 gene ontology terms (p < .001, FDR <0.05); cell division was the most significant. Eleven genes including UBE2C and BCL6 were validated by qPCR.CONCLUSION:
Arctigenin markedly inhibited IgE production in U266 cells, peanut-allergic murine model and PBMCs from allergic patients by down-regulating cell division, cell cycle-related genes and up-regulating anti-inflammatory factors.Key words
Full text:
1
Database:
MEDLINE
Main subject:
Peanut Hypersensitivity
/
Food Hypersensitivity
Type of study:
Prognostic_studies
/
Risk_factors_studies
Limits:
Animals
/
Humans
Language:
En
Journal:
Clin Exp Allergy
Journal subject:
ALERGIA E IMUNOLOGIA
Year:
2022
Type:
Article
Affiliation country:
China