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The effect of matured date palm tree (Phoenix dactylifera L.) fruit extract on mite-induced allergic symptoms in NC/Nga mice

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The effect of a hot water extract of matured date palm tree fruit on allergic responses was investigated in NC/Nga mice. The allergic score was significantly reduced in the mice fed a date palm tree fruit extract-added diet than the fruit extract-free diet. The levels of serum antigen-specific immunoglobulin E and spleen interleukin (IL)-4+CD4+ cells were significantly lowered in the mice fed the fruit extract-added diet. Bruton's tyrosine kinase (Btk) and IL-2-inducible T cell kinase (Itk) mRNA expressions in spleen cells were significantly lowered in the mice fed the fruit extract-added diet. Moreover, chlorogenic acid and pelargonin decreased these mRNA expressions in C3H/HeN mouse spleen cell cultures. These results suggest that the date palm tree fruit extract may reduce allergic symptoms in mice via a decrease in the number of type 2 helper T (Th2) cells, and a suppression of the expression of kinases involved in mast cell degranulation and Th2 cell differentiation.
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Keywords: NC/Nga mouse; Tec family kinase; anti-allergic property; mast cell; polyphenol

Document Type: Research Article

Affiliations: Interdisciplinary Graduate School of Science and Technology, Shinshu University, Nagano, Japan

Publication date: January 2, 2014

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