Monomeric Polysaccharide Isolation from Auricularia auricula
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Solution Overview
Problem
Current methods for isolating and purifying polysaccharides from Auricularia auricula are complex, environmentally polluting, and damage the chemical structure, hindering industrial production and understanding of their biological activities, particularly for monomeric polysaccharides with large molecular weights and complex structures.
Innovation Solution
A method involving heat reflux extraction, adsorption with macroporous resin, dialysis, and column chromatography is used to isolate a high-acetyl monomeric polysaccharide ME-2, characterized by its chemical structure and solubility, which is then used to develop a drug for treating silicosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If water extraction-alcohol precipitation and chemical reagent treatment are used to isolate polysaccharides, then polysaccharide extraction is achieved, but the process becomes complicated and causes environmental pollution
Solution Approach 1:
The patent extracts and removes harmful substances (proteins, pigments, and other contaminants) from the polysaccharide mixture using specific reagents and methods, thereby obtaining pure polysaccharides without requiring complex multi-step isolation processes. This extraction approach simplifies the overall process while maintaining high polysaccharide yield and purity.
2Manufacturing precision
If chemical reagents are used to remove proteins and pigments, then purification is achieved, but the chemical structure of native polysaccharides is destroyed
Solution Approach 1:
The patent converts the potentially harmful effect of chemical reagents into a beneficial outcome by using controlled chemical treatments that selectively remove impurities while preserving the native chemical structure of polysaccharides. The reagents are applied under optimized conditions that prevent structural degradation, thereby achieving purification without compromising polysaccharide integrity.
3Ease of manufacture
If crude polysaccharides are studied, then research is simplified, but the chemical fine structure and structural novelty cannot be clearly elucidated
Solution Approach 1:
The patent segments the polysaccharide structure into monomeric units with specific molecular weights (e.g., 70.0 kDa, 150.0 kDa, 260.0 kDa), allowing detailed structural analysis of individual components while maintaining the overall complexity of the native polysaccharide. This segmentation enables precise characterization of chemical fine structures and structural novelty without oversimplifying the research.
4Reliability
If large-molecular-weight native polysaccharides are involved, then biological activities are preserved, but structural characterization becomes extremely challenging
Solution Approach 1:
The patent uses monomeric polysaccharides with specific molecular weights as intermediary structures that bridge the gap between simple monosaccharide units and complex native polysaccharides. These monomeric forms serve as model compounds for structural characterization while maintaining the biological activities essential for pharmaceutical applications, thereby facilitating both structural analysis and functional study.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively isolates a monomeric polysaccharide with specific structural characteristics, reducing inflammatory and oxidative factors in silicosis models, demonstrating its potential as a therapeutic agent for silicosis treatment.
Implementation Method 1
subjecting the A. auricula extract-containing aqueous solution to adsorption with a macroporous adsorption resin column to remove substances such as pigments and proteins
Implementation Method 2
subjecting the A. auricula extract-containing aqueous eluate to dialysis with an ultrafiltration (UF) or dialysis bag to obtain refined total polysaccharides of A. auricula
Data Source
AI summary
A monomeric polysaccharide isolated from Auricularia auricula-judae (A. auricula), and a preparation method and use thereof are provided. The monomeric polysaccharide includes xylose, glucuronic acid, galactose, glucose, and mannose. The present disclosure further provides a structure and a preparation method of the monomeric polysaccharide isolated from A. auricula, and the preparation method adopts a plurality of chromatographic techniques. The monomeric polysaccharide isolated from A. auricula in the present disclosure is high-acetyl glucuronoxylogalactoglucomannan. The monomeric polysaccharide can reduce percentages of eosinophils, neutrophils, and lymphocytes in a lung lavage solution of a SiO2 dust-induced silicosis model mouse, significantly reduce levels of oxidative and inflammatory factors such as SOD, HYP, IL-6, and TNF-α in a SiO2 dust-induced silicosis model group in a dose-dependent manner, exhibit a protective effect for an experimental SiO2 dust-induced silicosis model mouse.