Related Experiment Video
Updated: Sep 27, 2025
11:06
Structural Characterization of Mannan Cell Wall Polysaccharides in Plants Using PACE
Published on: October 16, 2017
9.8K
A glucomannogalactan from Pleurotus geesteranus: Structural characterization, chain conformation and immunological
Zhenhua Liang1, Zhenhua Yin1, Xiaopeng Liu1
1National R & D Center for Edible Fungus Processing Technology, Henan University, Kaifeng 475004, Henan, China.
Carbohydrate Polymers
|April 15, 2022
Summary
A novel glucomannogalactan from P. geesteranus fruit bodies, PGP-1c, exhibits potent immune-enhancing effects. This polysaccharide promotes nitric oxide and cytokine secretion, suggesting therapeutic potential.
Area of Science:
- Mycology
- Carbohydrate Chemistry
- Immunology
Background:
- Polysaccharides from edible fungi are known for their diverse biological activities.
- Phellinus geesteranus is an understudied mushroom with potential medicinal properties.
Purpose of the Study:
- To isolate and characterize a water-soluble glucomannogalactan from P. geesteranus fruit bodies.
- To investigate its structural properties, chain conformation, and immunomodulatory effects.
Main Methods:
- Hot water extraction and column chromatography for polysaccharide isolation.
- Monosaccharide composition, methylation, and NMR spectroscopy for structural elucidation.
- In vitro assays to assess nitric oxide and cytokine secretion.
Main Results:
- A pure glucomannogalactan (PGP-1c, 20.9 kDa) with high neutral sugar content (94.7%) was isolated.
- Structural analysis revealed a backbone of α-(1→6)-linked galactose units with branched chains of glucose, mannose, and fucose.
- PGP-1c significantly promoted nitric oxide and cytokine secretion in a dose-dependent manner.
Conclusions:
- PGP-1c possesses a unique branched structure with potential for forming macromolecular networks.
- The polysaccharide demonstrates significant immunomodulatory activity, indicating its potential as an immune enhancer.
