ReferenceID 5653
Lycopene intake induces colonic regulatory T cells in mice and suppresses food allergy symptoms
Pediatr Allergy Immunol
BACKGROUND: Food allergy (FA) is a common disease in children; thus, a high level of safety is required for its prevention and treatment. Colonic regulatory T cells (Tregs) have been suggested to attenuate FA. We investi
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- Reference Id
- 5653
- Evidence Id
- 22243
- Core Evidence Id
- 22243
- Source Reference Id
- 4536
- Herb2 Reference Id
- HBREF005333
- Subject Paper Key
- HBIN033972_34716962
- Pubmed Id
- 34716962
- Doi
- 10.1111/pai.13691
- Paper Title
- Lycopene intake induces colonic regulatory T cells in mice and suppresses food allergy symptoms
- Paper Abstract
- BACKGROUND: Food allergy (FA) is a common disease in children; thus, a high level of safety is required for its prevention and treatment. Colonic regulatory T cells (Tregs) have been suggested to attenuate FA. We investigated the Treg-inducing ability and anti-FA effects of carotenoids, a pigment contained in vegetables and fruits. METHODS: C57BL/6N mice were fed a diet containing 0.01% (w/w) of lycopene, beta-carotene, astaxanthin or lutein for 4 weeks, and the population of colonic Tregs was assessed. Subsequently, to evaluate the Treg-inducing ability of lycopene, splenic naive CD4+ T cells from BALB/c mice were cultured with anti-CD3/CD28 antibody, TGF-beta and lycopene, and the frequencies of Tregs were examined. The effect of 0.1% (w/w) lycopene containing diet on FA was investigated in OVA-induced FA model BALB/c mice. RESULTS: In screening, only lycopene significantly increased the frequency and number of colonic Tregs. Lycopene also increased Treg differentiation in splenic naive CD4+ T cells. In FA mice, lycopene feeding significantly increased the number of colonic Tregs and attenuated allergic symptoms. The expression levels of IL-4, IL-9 and IL-13 mRNA in colonic mucosa were also significantly reduced by lycopene. IL-9 is known to induce proliferation of mast cells, and we found that lycopene feeding significantly reduced the number of mast cells in the colonic mucosa of FA mice. CONCLUSION: Our results suggest that lycopene, a carotenoid present in many common foods on the market, may have the potential to induce colonic Tregs and suppress FA symptoms.
- Journal
- Pediatr Allergy Immunol
- Publish Year
- 2022
- Experiment Subject
- mouse; children
- Experiment Type
- Animal Experiment
- Phenotype Related
- Food Allergy
- Paper Title Cn
- Paper Title En
- Lycopene intake induces colonic regulatory T cells in mice and suppresses food allergy symptoms
- Bilingual Status
- semi_complete