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Published in: BMC Cancer 1/2011

Open Access 01-12-2011 | Research article

Protein-bound polysaccharide from Phellinus linteus inhibits tumor growth, invasion, and angiogenesis and alters Wnt/β-catenin in SW480 human colon cancer cells

Authors: Kyoung-Sub Song, Ge Li, Jong-Seok Kim, Kaipeng Jing, Tae-Dong Kim, Jin-Pyo Kim, Seung-Bo Seo, Jae-Kuk Yoo, Hae-Duck Park, Byung-Doo Hwang, Kyu Lim, Wan-Hee Yoon

Published in: BMC Cancer | Issue 1/2011

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Abstract

Background

Polysaccharides extracted from the Phellinus linteus (PL) mushroom are known to possess anti-tumor effects. However, the molecular mechanisms responsible for the anti-tumor properties of PL remain to be explored. Experiments were carried out to unravel the anticancer effects of PL.

Methods

The anti-cancer effects of PL were examined in SW480 colon cancer cells by evaluating cell proliferation, invasion and matrix metallo-proteinase (MMP) activity. The anti-angiogenic effects of PL were examined by assessing human umbilical vein endothelial cell (HUVEC) proliferation and capillary tube formation. The in vivo effect of PL was evaluated in an athymic nude mouse SW480 tumor engraft model.

Results

PL (125-1000 μg/mL) significantly inhibited cell proliferation and decreased β-catenin expression in SW480 cells. Expression of cyclin D1, one of the downstream-regulated genes of β-catenin, and T-cell factor/lymphocyte enhancer binding factor (TCF/LEF) transcription activity were also significantly reduced by PL treatment. PL inhibited in vitro invasion and motility as well as the activity of MMP-9. In addition, PL treatment inhibited HUVEC proliferation and capillary tube formation. Tumor growth of SW480 cells implanted into nude mice was significantly decreased as a consequence of PL treatment, and tumor tissues from treated animals showed an increase in the apoptotic index and a decrease in β-catenin expression. Moreover, the proliferation index and microvessel density were significantly decreased.

Conclusions

These data suggest that PL suppresses tumor growth, invasion, and angiogenesis through the inhibition of Wnt/β-catenin signaling in certain colon cancer cells.
Appendix
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Metadata
Title
Protein-bound polysaccharide from Phellinus linteus inhibits tumor growth, invasion, and angiogenesis and alters Wnt/β-catenin in SW480 human colon cancer cells
Authors
Kyoung-Sub Song
Ge Li
Jong-Seok Kim
Kaipeng Jing
Tae-Dong Kim
Jin-Pyo Kim
Seung-Bo Seo
Jae-Kuk Yoo
Hae-Duck Park
Byung-Doo Hwang
Kyu Lim
Wan-Hee Yoon
Publication date
01-12-2011
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2011
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/1471-2407-11-307

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