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Structural characterization and immuno-modulating activities of a polysaccharide from Ganoderma sinense.
Xiao-Qiang Han1, Ben Chung Lap Chan, Hua Yu
1State Key Laboratory of Phytochemistry and Plant Resources in West China, Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong Special Administrative Region, PR China.
International Journal of Biological Macromolecules
|July 4, 2012
Summary
A Ganoderma sinense polysaccharide (GSP-4) shows promising immunomodulatory effects. It stimulates key immune markers in human and mouse cells, suggesting potential for cancer immunotherapy.
Area of Science:
- * Biochemistry and immunology
- * Natural product chemistry
- * Pharmacology
Background:
- * Ganoderma species are known for bioactive compounds.
- * Polysaccharides are a major class of immunomodulatory agents from fungi.
- * Understanding the immunomodulatory potential of specific fungal polysaccharides is crucial for therapeutic development.
Purpose of the Study:
- * To isolate and characterize a protein-bound polysaccharide (GSP-4) from Ganoderma sinense.
- * To investigate the immunomodulatory effects of GSP-4 on human and murine immune cells.
- * To evaluate GSP-4 as a potential candidate for cancer immunotherapy.
Main Methods:
- * Isolation of GSP-4 from water extract of Ganoderma sinense fruiting bodies.
- * Chemical analysis of GSP-4 composition (sugar residues and linkages).
- * Assessment of immunomodulatory activity using human peripheral blood mononuclear cells (PBMCs) and RAW 264.7 macrophage cell line, measuring cytokine production and nitric oxide release.
Main Results:
- * GSP-4 is a protein-bound polysaccharide composed of mannose, glucose, and galactose.
- * GSP-4 significantly stimulated the production of TNF-α, IL-1β, IL-12, and GM-CSF in PBMCs.
- * GSP-4 increased nitric oxide (NO), TNF-α, and IL-6 production in RAW 264.7 cells, and enhanced inducible NO synthase mRNA expression.
Conclusions:
- * GSP-4 exhibits significant immunomodulatory effects on both human and murine immune cells.
- * The findings provide the first evidence supporting GSP-4's immunomodulating properties.
- * GSP-4 is a potential candidate for further investigation in cancer immunotherapy.
