4.7 Article

Intestinal regulatory T cell induction by β-elemene alleviates the formation of fat tissue-related inflammation

Journal

ISCIENCE
Volume 24, Issue 1, Pages -

Publisher

CELL PRESS
DOI: 10.1016/j.isci.2020.101883

Keywords

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Funding

  1. Japan Society for the Promotion of Science (JSPS) [18H02152]
  2. Grants-in-Aid for Scientific Research [18H02152] Funding Source: KAKEN

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Beta-elemene has therapeutic effects on obesity-induced chronic inflammation by adjusting the balance of immune cell populations in fat tissue through the generation of regulatory T cells in the intestinal immune system by modulating DC function.
The role of the intestinal immune system in the inhibition of fat tissue-related inflammation by dietary material is yet to be elucidated. Oral administration of beta-elemene, contained in various foodstuffs, downregulated expressions of inflammatory cytokines and increased Foxp3(+)CD4(+) T cells in adipose tissue of obese mice. However, beta-elemene did not affect the inflammatory response of adipose tissue in vitro, suggesting that the inhibition observed in vivo was not due to direct interactions of adipose tissue with beta-elemene. Instead, beta-elemene increased Foxp3(+)CD4(+) T cell population enhancing gene expressions of transforming growth factor beta 1, retinaldehyde dehydrogenase 2, integrin alpha nu beta 8, and interleukin-10 in intestinal dendritic cells (DCs) in vivo and in vitro. Taken together, this study suggested the therapeutic effects of beta-elemene on treating experimental obesity-induced chronic inflammation by adjusting the balance of immune cell populations in fat tissue through the generation of regulatory T cells in the intestinal immune system by modulating DC function.

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