Chrysin, a natural and biologically active flavonoid, influences a murine leukemia model in vivo through enhancing populations of T-and B-cells, and promoting macrophage phagocytosis and NK cell cytotoxicity.

Abstract	Chrysin (5,7-dihydroxyflavone), a natural and biologically active flavonoid found in plants, possesses many biological activities and anticancer effects. However, there is no available evidence regarding the antileukemia responses to chrysin in a mouse model. We hypothesized that chrysin affects murine WEHI-3 leukemia cells in vitro and in vivo. The present study showed that chrysin at concentrations of 5-50 μM reduced the cell viability in concentration- and time-dependent manners. In an in vivo study, WEHI-3 leukemic BALB/c mice were established in order to determine antileukemia activity of chrysin. Our results revealed that chrysin increased the percentage of CD3 (T-cell maker), CD19 (B-cell maker) and Mac-3 (macrophages) cell surface markers in treated mice as compared with the untreated leukemia group. However, chrysin did not significantly influence the level of CD11b (a monocyte maker) in treated mice. Moreover, there was a significant increase in phagocytosis by macrophages from peripheral blood mononuclear cells, but no effect in those from the peritoneal cavity in leukemic mice after chrysin treatment. Isolated splenocytes from chrysin-treated leukemic mice demonstrated an increase of natural killer (NK) cell cytotoxicity. Based on these observations, chrysin might exhibit antileukemia effects on a murine WEHI-3 cell line-induced leukemia in vivo.
Authors	Chin-Chung Lin, Chun-Shu Yu, Jai-Sing Yang, Chi-Cheng Lu, Jo-Hua Chiang, Jing-Pin Lin, Chao-Lin Kuo, Jing-Gung Chung
Journal	In vivo (Athens, Greece) (In Vivo) 2012 Jul-Aug Vol. 26 Issue 4 Pg. 665-70 ISSN: 1791-7549 [Electronic] Greece
PMID	22773581 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References	Flavonoids chrysin
Topics	Animals B-Lymphocytes (drug effects, immunology) Cell Line, Tumor Cytotoxicity, Immunologic Disease Models, Animal Flavonoids (pharmacology) Killer Cells, Natural (drug effects, immunology) Leukemia, Experimental (immunology, pathology) Macrophages (drug effects, immunology) Male Mice Mice, Inbred BALB C Phagocytosis T-Lymphocytes (drug effects, immunology)

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