Polysaccharide peptide

Polysaccharide peptide (PSP) is a protein-bound polysaccharide extracted from the edible mushroom Coriolus versicolor. PSP is currently in the animal-testing phase of research in many countries for use as an anti-tumor drug. It appears to work as a biological response modifier (BRM), enhancing the body's own use of macrophages and T-lymphocytes, rather than directly attacking any tumors.[1] Polysaccharide Krestin (PSK) was first isolated in Japan in the late 1960s while PSP was isolated about 1983 in China. Each compound has shown remarkable anticancer properties with few side effects.[2] By 1987 PSK accounted for more than 25% of total national expenditure for anticancer agents in Japan.[3]

## See also

Polysaccharide-K

## References

1. ↑ Ng TB (1998). "A review of research on the protein-bound polysaccharide (polysaccharopeptide, PSP) from the mushroom Coriolus versicolor (Basidiomycetes: Polyporaceae).". Gen Pharmacol 30 (1): 1–4. doi:10.1016/S0306-3623(97)00076-1. PMID 9457474.
2. ↑ Abba Kastin (2013-01-26). Handbook of Biologically Active Peptides. Academic Press. pp. 180–. ISBN 978-0-12-385096-6. https://books.google.com/books?id=Xz4yFpdSRrwC&pg=PA180.
3. ↑ "Polysaccharide krestin is a novel TLR2 agonist that mediates inhibition of tumor growth via stimulation of CD8 T cells and NK cells". Clin. Cancer Res. 17 (1): 67–76. 2011. doi:10.1158/1078-0432.CCR-10-1763. PMID 21068144.

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