To investigate the ameliorative effect of yeast extract on β-lactoglobulin allergy in mice and its regulatory effect on the gut microbiota, and to explore its mechanism of action.
A mouse model of β-lactoglobulin allergy was established to explore the effects of yeast extract intervention on allergic symptoms, serum histamine, immunoglobulin E (IgE), and mast cell protease-1, as well as the morphology of spleen and colon tissues, intestinal microbiota, and short-chain fatty acids.
Yeast extract could alleviate allergic symptoms in β-lactoglobulin-allergic mice, reduce serum IgE levels, mast cell protease activity, and histamine content, improve intestinal inflammatory infiltration, increase the expression of CXCR3+Th1 and FOXP3+Treg cells in the spleen, up-regulate the expression of Th1-type factors (IFN-γ) and Treg-type factors (TGF-β) in serum, increase the content of acetic acid, butyric acid, and short-chain fatty acids, and increase the relative abundance of Faecalibacterium, Lactobacillus, and Bifidobacterium.
Yeast extract can alleviate food allergy induced by β-lactoglobulin, and its mechanism may be related to the regulation of intestinal microbiota, enhancement of intestinal barrier function, regulation of Th1/Treg cell immune balance, and inhibition of IgE secretion.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |