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International Journal of Medicinal Mushrooms
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ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.v19.i3.30
pages 213-223

Tissue Inhibitor of Metalloproteinase-1 (TIMP-1) and IL-23 Induced by Polysaccharide of the Black Hoof Medicinal Mushroom, Phellinus linteus (Agaricomycetes)

Soo Kyung Yoon
Department of Life Science, University of Seoul, Seoul, Korea
Soo Kyung Sung
Department of Life Science, University of Seoul, Seoul, Korea
Dong Hee Lee
Department of Life Sciences, University of Seoul, Seoul, Korea
Ha Won Kim
Department of Life Sciences, University of Seoul Dongdaemun-gu, Jennong-dong 90, Seoul 130-743, South Korea

RÉSUMÉ

Matrix metalloproteinase-9 (MMP-9) has diverse roles associated with cell growth, migration, invasion, and angiogenesis. Tissue inhibitor of metalloproteinase-1 (TIMP-1) is known to inhibit MMP-9 by complexing with it at a 1:1 ratio. Suppressing MMP-9 activity through the overexpression of TIMP-1 allows for regulation of tumor growth and metastasis by blocking invasion and angiogenesis in the tumor microenvironment. We found that TIMP-1 and interleukin (IL)-23 are induced in RAW264.7 macrophage cells, a cell line established by Abelson leukemia virus transformation from the BALB/c mouse strain, in a dose-dependent pattern, at the transcriptional level by treatment with a crude polysaccharide fraction of Phellinus linteus (CPP) at a range of 10 to 1000 μg/mL. We purified CPP into 2 polysaccharide fractions, Fr-I and Fr-II, and one protein fraction, Fr-III. Among the 3 fractions, Fr-II increased TIMP-1 expression 6.8-fold compared with the control, according to quantitative reverse-transcription polymerase chain reaction (qRT-PCR) analysis in the RAW264.7 culture system. On the other hand, all 3 fractions increased IL-23 expression, with the highest increase brought about by Fr-II. qRT-PCR analysis showed that Fr-I and Fr-II increased IL-17 expression in RAW264.7 cells by 13.3-fold and 19.6-fold, respectively. IL-17 expression in lung tissue was increased 2.1-fold compared with the control group, whereas that in liver tissue was unaltered by oral administration of CPP for 7 days. In a mouse model, qRT-PCR analysis showed that CPP induced liver TIMP-1 and lung IL-17 expressions 8.9-fold and 2.1-fold, respectively, without affecting MMP-9 expression. Our in vitro and in vivo data suggest that inducing TIMP-1 without altering MMP-9 expression by administering the polysaccharide fraction of Ph. linteus could be a novel antitumor or antimetastasis mechanism of polysaccharide from the medicinal mushroom Ph. linteus.


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