High fucoxanthin wakame (Undaria pinnatifida) prevents tumor microenvironment formation in an AOM/DSS mouse carcinogenic model
2020
Terasaki, Masaru | Kuramitsu, Yasuhiro | Kojoma, Mareshige | Kim, Sang-yong | Tanaka, Takuji | Maeda, Hayato | Miyashita, Kazuo | Kawagoe, Chikara | Kohno, Shoui | Mutoh, Michihiro
Fucoxanthin (Fx) is a major xanthophyll in Undaria pinnatifida (wakame) and is one of the potent carotenoids against cancer development. However, the cancer preventive function of high fucoxanthin (Fx-high) wakame itself has not been well investigated. Therefore, we cultivated Fx-high wakame and investigated the effect of this alga on a AOM/DSS carcinogenesis mouse model. Fx-high wakame (Fx 30 mg/kg body weight) significantly decreased the number of cells that compose the tumor microenvironment compared to mice without wakame. The number of colorectal cancer stem cell-like CD44ʰⁱᵍʰ/EpCAMʰⁱᵍʰ cells, cancer-associated fibroblast-like αSMAʰⁱᵍʰ cells, tumor-associated macrophage-like and dendritic cell-like CD206ʰⁱᵍʰ cells were significantly decreased 0.6-, 0.5-, and 0.5-fold, respectively, and apoptotic cell-like cleaved caspase-3ʰⁱᵍʰ cells were significantly increased 1.7-fold by Fx-high wakame. Moreover, salivary glycine was decreased 0.4-fold by Fx-high wakame. Our results imply that Fx-high wakame could prevent formation of the tumor microenvironment with a salivary predictor of the Fx-high wakame function.
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