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Abstract Title:

Oral Administration of Vanillin Improves Imiquimod-Induced Psoriatic Skin Inflammation in Mice.

Abstract Source:

J Agric Food Chem. 2017 Nov 29 ;65(47):10233-10242. Epub 2017 Nov 14. PMID: 29073354

Abstract Author(s):

Hui-Man Cheng, Feng-Yuan Chen, Chia-Cheng Li, Hsin-Yi Lo, Yi-Fang Liao, Tin-Yun Ho, Chien-Yun Hsiang

Article Affiliation:

Hui-Man Cheng

Abstract:

Vanillin is one of the most widely used flavoring products worldwide. Psoriasis is a chronic inflammatory skin disorder. The interleukin-23 (IL-23)/interleukin-17 (IL-17) axis plays a critical role in psoriasis. Here, we analyzed the effect of vanillin on imiquimod (IMQ)-induced psoriatic skin inflammation in mice. Mice were treated topically with IMQ on the back skin and orally with various amounts of vanillin for 7 consecutive days. Vanillin significantly improved IMQ-induced histopathological changes of skin in a dose-dependent manner. The thickness and number of cell layers of epidermis were reduced by 29± 14.4 and 27.8 ± 11%, respectively, in mice given 100 mg/kg of vanillin. A microarray showed that a total of 9042 IMQ-upregulated genes were downregulated by vanillin, and the biological pathways involved in the immune system and metabolism were significantly altered by vanillin. The upregulatedexpressions of IL-23, IL-17A, and IL-17F genes were suppressed by vanillin, with fold changes of -3.07 ± 0.08, -2.06 ± 0.21, and -1.62 ± 0.21, respectively. Moreover, vanillin significantly decreased both the amounts of IL-17A and IL-23 and the infiltration of immune cells in the skin tissues ofIMQ-treated mice. In conclusion, our findings suggested that vanillin was an effective bioactive compound against psoriatic skin inflammation. Moreover, the downregulation of IL-23 and IL-17 expression suggested that vanillin was a novel regulator of the IL-23/IL-17 axis.

Study Type : Animal Study

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Sayer Ji
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