Coriolus
Versicolor
Coriolus Versicolor
Common Names PSK, PSP, VPS, Turkey Tail, Yun Zhi, Kawaratake, Krestin
Clinical summary:
Coriolus versicolor is a mushroom of the Basidiomycetes class. It is used in traditional Chinese medicine as a tonic, and recent studies suggest that it has immunostimulant and anti-tumor properties. Polysaccharide-K (PSK), a proprietary product derived from Coriolus, was developed for cancer treatment in Japan. When used as an adjuvant, PSK appears to improve survival rates in patients with gastric and colorectal cancers. Other Coriolus extracts, such as polysaccharide-peptide (PSP) and VPS, are available as dietary supplements. One clinical study demonstrated that when used in conjunction with chemotherapy, PSP may benefit patients with advanced non-small cell lung cancer). Other clinical studies using Coriolus extract alone or in combination with other botanicals also suggest positive immunomodulatory effects. However, studies on breast cancer, hepatocellular carcinoma, and leukemia produced mixed results. A hot water extract of Coriolus, VPS, was found to enhance development of large intestinal tumors in mice. Coriolus extracts are generally well tolerated but minor adverse effects have been reported.
Many over-the-counter Coriolus products are not standardized, making it difficult to compare potency between brands. It is also unclear if PSK, PSP, and other Coriolus extracts have comparable effects.
Uses:
Mechanism of action:
Coriolus versicolor is thought to be a biological response modifier. PSK has been found to induce cytokine expression in human peripheral blood mononuclear cells in vitro. In other studies, PSP, as well as a Coriolus extract, selectively induced apoptosis of human promyelocytic leukemia HL-60 cells. PSP also increased apoptotic cell death in cells that had been treated with camptothecin. In these cells, PSP reduced cellular proliferation, inhibited cell progression through both the S and G2 phases of DNA replication, reduced 3H - thymidine uptake, and prolonged DNA synthesis time. An additional in vitro study showed that a medicinal mushroom blend that included Coriolus inhibited cell proliferation and induced cell cycle arrest at the G2/M phase in the invasive human breast cancer cell line MDA-MB-231. DNA-microarray analysis indicated that the mushroom extract inhibited the expression of cell cycle regulatory genes and suppressed metastatic behavior through the inhibition of cell adhesion, cell migration, and cell invasion. The inhibition of metastatic behavior was linked to the suppression of urokinase plasminogen activator (uPA). PSP has also been shown to inhibit the interaction between HIV-1 gp120 and CD4 receptor, HIV-1 transcriptase activity, and glycohydrolase enzyme activity associated with viral glycosylation.
Several animal studies report of synergism between PSK and biologic therapies, including a concanavalin A-bound L1210 vaccine and the IgG2a monoclonal antibody against human colon cancer cells. PSP induces cytokine production and T-cell proliferation, and prevents immune suppression due to cyclophosphamide in animal models. Peritoneal macrophages isolated from mice that were fed PSP show increased production of reactive nitrogen intermediates, superoxide anions, and tumor necrosis factor. PSP also shows analgesic activity in mouse models.
Non-small cell lung cancer patients have increased leukocyte and neutrophil counts, and increased serum IgG and IgM after consumption of PSP. Healthy volunteers as well as breast cancer patients who used a formula containing Coriolus and Salvia were found to have elevated counts of T-helper lymphocytes (CD4+), a high ratio of CD4+/CD8+, and elevated absolute counts of B-lymphocytes. TNF-alpha and IL-8 gene expression were also found to be significantly induced after PSK administration in healthy volunteers and gastric cancer patients, although individual response varied. PSK was shown to induce apoptosis in promyelomonocytic leukemia HL-60 cells without inducing differentiation, and p38 MAPK (mitogen-activated protein kinas) was found to play an important role in this process.
Adverse Reactions:
Adverse reactions from Coriolus are rare. But passage of dark colored stools (not originating from occult blood), darkening of fingernails, and low-grade hematological and gastrointestinal toxicities have been reported when used in conjunction with chemotherapy agents. However, such effects may be caused by the chemotherapy agents themselves.
Versicolor
Coriolus Versicolor
Common Names PSK, PSP, VPS, Turkey Tail, Yun Zhi, Kawaratake, Krestin
Clinical summary:
Coriolus versicolor is a mushroom of the Basidiomycetes class. It is used in traditional Chinese medicine as a tonic, and recent studies suggest that it has immunostimulant and anti-tumor properties. Polysaccharide-K (PSK), a proprietary product derived from Coriolus, was developed for cancer treatment in Japan. When used as an adjuvant, PSK appears to improve survival rates in patients with gastric and colorectal cancers. Other Coriolus extracts, such as polysaccharide-peptide (PSP) and VPS, are available as dietary supplements. One clinical study demonstrated that when used in conjunction with chemotherapy, PSP may benefit patients with advanced non-small cell lung cancer). Other clinical studies using Coriolus extract alone or in combination with other botanicals also suggest positive immunomodulatory effects. However, studies on breast cancer, hepatocellular carcinoma, and leukemia produced mixed results. A hot water extract of Coriolus, VPS, was found to enhance development of large intestinal tumors in mice. Coriolus extracts are generally well tolerated but minor adverse effects have been reported.
Many over-the-counter Coriolus products are not standardized, making it difficult to compare potency between brands. It is also unclear if PSK, PSP, and other Coriolus extracts have comparable effects.
Uses:
- Cancer prevention
- Cancer treatment
- Chemotherapy side effects
- Hepatitis
- Herpes
- Immunostimulation
- Infections
- Radiation therapy side effects
- Strength and stamina
Mechanism of action:
Coriolus versicolor is thought to be a biological response modifier. PSK has been found to induce cytokine expression in human peripheral blood mononuclear cells in vitro. In other studies, PSP, as well as a Coriolus extract, selectively induced apoptosis of human promyelocytic leukemia HL-60 cells. PSP also increased apoptotic cell death in cells that had been treated with camptothecin. In these cells, PSP reduced cellular proliferation, inhibited cell progression through both the S and G2 phases of DNA replication, reduced 3H - thymidine uptake, and prolonged DNA synthesis time. An additional in vitro study showed that a medicinal mushroom blend that included Coriolus inhibited cell proliferation and induced cell cycle arrest at the G2/M phase in the invasive human breast cancer cell line MDA-MB-231. DNA-microarray analysis indicated that the mushroom extract inhibited the expression of cell cycle regulatory genes and suppressed metastatic behavior through the inhibition of cell adhesion, cell migration, and cell invasion. The inhibition of metastatic behavior was linked to the suppression of urokinase plasminogen activator (uPA). PSP has also been shown to inhibit the interaction between HIV-1 gp120 and CD4 receptor, HIV-1 transcriptase activity, and glycohydrolase enzyme activity associated with viral glycosylation.
Several animal studies report of synergism between PSK and biologic therapies, including a concanavalin A-bound L1210 vaccine and the IgG2a monoclonal antibody against human colon cancer cells. PSP induces cytokine production and T-cell proliferation, and prevents immune suppression due to cyclophosphamide in animal models. Peritoneal macrophages isolated from mice that were fed PSP show increased production of reactive nitrogen intermediates, superoxide anions, and tumor necrosis factor. PSP also shows analgesic activity in mouse models.
Non-small cell lung cancer patients have increased leukocyte and neutrophil counts, and increased serum IgG and IgM after consumption of PSP. Healthy volunteers as well as breast cancer patients who used a formula containing Coriolus and Salvia were found to have elevated counts of T-helper lymphocytes (CD4+), a high ratio of CD4+/CD8+, and elevated absolute counts of B-lymphocytes. TNF-alpha and IL-8 gene expression were also found to be significantly induced after PSK administration in healthy volunteers and gastric cancer patients, although individual response varied. PSK was shown to induce apoptosis in promyelomonocytic leukemia HL-60 cells without inducing differentiation, and p38 MAPK (mitogen-activated protein kinas) was found to play an important role in this process.
Adverse Reactions:
Adverse reactions from Coriolus are rare. But passage of dark colored stools (not originating from occult blood), darkening of fingernails, and low-grade hematological and gastrointestinal toxicities have been reported when used in conjunction with chemotherapy agents. However, such effects may be caused by the chemotherapy agents themselves.