Displaying posts tagged with

“tumor”

Chinese Herb List – Coriolus versicolor (Yunzhi)

Cloud mushroom contains several saccharides including polysaccharide peptide (PSP) and polysaccharide-K (PSK, krestin). The protein bound polysaccharides have been found to be immune-modulating and anti-tumor, and their polypeptide moieties are rich in aspartic acid and glutamic acid. By gas chromatography and HPLC, PSP has proved that in addition to glucose, it also contains five other monosaccharides – mannose, xylose, galactose, rhamnose and arabinose. The polysaccharide peptides can be found in the mycelium, while the fruiting body mainly contains polysaccharides{…}

Chemopreventive Effect of PSP Through Targeting of Prostate Cancer Stem Cell-Like Population

Recent evidence suggested that prostate cancer stem/progenitor cells (CSC) are responsible for cancer initiation as well as disease progression. Unfortunately, conventional therapies are only effective in targeting the more differentiated cancer cells and spare the CSCs. Here, we report that PSP, an active component extracted from the mushroom Turkey tail (also known as Coriolus versicolor), is effective in targeting prostate CSCs. We found that treatment of the prostate cancer cell line PC-3 with PSP led to the down-regulation of CSC markers (CD133 and CD44) in a time and dose-dependent manner. Meanwhile, PSP treatment not only suppressed the ability of PC-3 cells to form prostaspheres under non-adherent culture conditions, but also inhibited their tumorigenicity in vivo, further proving that PSP can suppress prostate CSC properties. To investigate if the anti-CSC effect of PSP may lead to prostate cancer chemoprevention, transgenic mice (TgMAP) that spontaneously develop prostate tumors were orally fed with PSP for 20 weeks. Whereas 100% of the mice that fed with water only developed prostate tumors at the end of experiment, no tumors could be found in any of the mice fed with PSP, suggesting that PSP treatment can completely inhibit prostate tumor formation. Our results not only demonstrated the intriguing anti-CSC effect of PSP, but also revealed, for the first time, the surprising chemopreventive property of oral PSP consumption against prostate cancer.[…]

Mushroom Compound Suppresses Prostate Tumors

ScienceDaily (May 24, 2011) — A mushroom used in Asia for its medicinal benefits has been found to be 100 percent effective in suppressing prostate tumour development in mice during early trials, new Queensland University of Technology (QUT) research shows.

Dr Ling, from the Australian Prostate Cancer Research Centre-Queensland and Institute for Biomedical Health & Innovation (IHBI) at QUT, said the results could be an important step towards fighting a disease that kills 3,000 Australian men a year.[…]

Clinical trail China phase 1

Polysaccharide-peptide (PSP) is a protein bound polysaccharide isolated from the COV-1 strain of Yunzhi (Coriolous versicolor mushroom) and made from modern alcohol extraction techniques. Each capsule contains 0.34 grams of PSP. Experimental in-vitro and in-vivo studies have shown PSP inhibits the proliferation of cancer cells including P338 leukemia cells, S 180 cells, Ehrlich ascites, and stomach and lung cancer cells. It also inhibits the growth of some tumors such as the lymphatic tumor of human skin tissue cells. In addition, PSP affects the immune system of mice by stimulating the production of ?\interferons, increasing the phagocytic index and metabolic rate of the reticuloendothilial system and by raising the HC 50 (median hemolytic dose), IgG and PFC (plaque forming cell) values. Human in-vivo experiments have also shown PSP can modulate the immune system by helping to prevent and partly eliminate the side effects of radiation and chemotherapeutic agents used by cancer patients. […]

Antimetastatic Effects of PSK (Krestin), a Protein-bound Polysaccharide Obtained from Basidiomycetes: An Overview

PSK is currently used as an immuno therapeutic agent for gastric colorectal, and lung cancers in Japan. It has virtually no adverse effects, and it can be administered P. over a long term. Consequently, its use need not be limited to the treatment of Cancer, and, as our previous paper suggested, it should in the future prove valuable as a general chemopreventive agent and, as this review shows, as anti metastatic agent. The principal mechanisms of PSK may act as an inhibitor of the motility, invasion, and progression of tumor cells, in addition to its role as an immunomodulator.[…]

Tumor growth promoting activity of an immunosuppressive substance and its modulation by protein-bound polysaccharide PSK

Further studies are required to clarify the origin of IS and its function in the body. For that purpose, the experimental model used in the present study is useful. Serum levels of IS may serve as a parameter to monitor the efficacy of immunotherapy.[…]

Suppression of in vivo tumor-induced angiogenesis by the protein-bound polysaccharide PSK.

The anti-angiogenic effects of an antitumor protein-bound polysaccharide, PSK, obtained from cultured mycelia of Coriolus

versicolor in basidiomycetes were examined by the mouse dorsal air sac assay. PSK suppressed the mouse hepatoma

MH134-induced angiogenesis when assessed by morphological and biochemical examinations. This finding suggested that

the anti-metastatic effect of PSK is attributed to the suppression of tumor-induced angiogenesis.[…]

The cell death process of the anticancer agent polysaccharidepeptide (PSP) in human promyelocytic leukemic HL-60 cells.

The polysaccharide peptide (PSP) isolated from the mycelia of Chinese Medicinal fungus Coriolus versicolor has proven

benefits in clinical trials in China but the mechanism of action has not been elucidated. In this study, HL-60 cell line was

used to investigate the anti-proliferation and cell death process of PSP. The cytotoxicity of PSP on normal human

T-lymphocytes was also evaluated. We show that PSP induced apoptosis of human promyelocytic leukemia HL-60 cells

but not of normal human T-lymphocytes. The apoptotic machinery induced by PSP was associated with a decrease in

Bcl-2/Bax ratio, drop in mitochondrial transmembrane potential, cytochrome c release, and activation of caspase-3, -8 and

-9. Activation of the cellular apoptotic program is a current strategy for the treatment of human cancer, and the selectivity

of PSP to induce apoptosis in cancerous and not on normal cells supports its development as a novel anticancer agent.[…]

Randomized adjuvant trial to evaluate the addition of tamoxifen and PSK to chemotherapy in patients with primary breast cancer. 5-Year results from the Nishi-Nippon Group of the Adjuvant Chemoendocrine Therapy for Breast Cancer Organization.

Results of subset analyses suggested a benefit from TAM in

postmenopausal patients with ER-positive and Stage IIA T2N1 cancer and a benefit from PSK in patients with

node-negative, ER-negative, and Stage IIA T2N1 cancer. CONCLUSIONS: The 5-year results of the current trial showed a

survival advantage by the addition of TAM to chemotherapy in patients with ER-positive and Stage IIIA T3N0 cancer.[…]

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