• The Korea Journal of Herbology
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• v.20 no.2
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• pp.55-60
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• 2005

Objectives : This study was conducted to investigate the effects Innotus obliquus on the cytokine expression in Raw 264.7 cells. Methods : In Raw 264.7 cells stimulated with lipopolysaccaride(LPS) to Mimic inflammation, Innotus obliquus ethanol extract inhibited nitric oxide production in a dose-dependent manner and abrogated inducible nitric oxide sythase(iNOS) and cyclooxigenase (COX-2). The levels of cytokines were analyzed by sandwich immuno assays. Results and Conclusions : Results provided evidence that Innotus obliquus inhibited the production of IL-b, and IL-6 in Raw 264.7 cells activated with lipopolysaccharide (LPS). These finding suggested that Innotus obliquus can produce anti-inflammatory effect, which may playa role in adjunctive therapy in Gram-negative bacterial infections.

• Nutrition Research and Practice
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• v.9 no.2
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• pp.111-116
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• 2015

BACKGROUND/OBJECTIVES: Inonotus obliquus (I. obliquus, Chaga mushroom) has long been used as a folk medicine to treat cancer. In the present study, we examined whether or not ethanol extract of I. obliquus (EEIO) inhibits cell cycle progression in HT-29 human colon cancer cells, in addition to its mechanism of action. MATERIALS/METHODS: To examine the effects of Inonotus obliquus on the cell cycle progression and the molecular mechanism in colon cancer cells, HT-29 human colon cancer cells were cultured in the presence of $2.5-10{\mu}g/mL$ of EEIO, and analyzed the cell cycle arrest by flow cytometry and the cell cycle controlling protein expression by Western blotting. RESULTS: Treatment cells with $2.5-10{\mu}g/mL$ of EEIO reduced viable HT-29 cell numbers and DNA synthesis, increased the percentage of cells in $G_1$ phase, decreased protein expression of CDK2, CDK4, and cyclin D1, increased expression of p21, p27, and p53, and inhibited phosphorylation of Rb and E2F1 expression. Among I. obliquus fractions, fraction 2 (fractionated by dichloromethane from EEIO) showed the same effect as EEIO treatment on cell proliferation and cell cycle-related protein levels. CONCLUSIONS: These results demonstrate that fraction 2 is the major fraction that induces $G_1$ arrest and inhibits cell proliferation, suggesting I. obliquus could be used as a natural anti-cancer ingredient in the food and/or pharmaceutical industry.