Ultrasonic disruption extraction, characterization and bioactivities of polysaccharides from wild Armillaria mellea

• Published in: International journal of biological macromolecules 2020-08, Vol.156, p.1491-1502
• Main Authors: Chen, Ruizhan, Ren, Xing, Yin, Wei, Lu, Juan, Tian, Li, Zhao, Lun, Yang, Ruping, Luo, Shujun
• Format: Article
• Language: English
• Subjects: Animals; Armillaria - chemistry; Armillariamellea polysaccharides; Biological activities; Carbohydrate chemistry; Carbohydrate Sequence; Cell Proliferation - drug effects; Free Radical Scavengers - chemistry; Free Radical Scavengers - isolation & purification; Free Radical Scavengers - pharmacology; Fungal Polysaccharides - chemistry; Fungal Polysaccharides - isolation & purification; Fungal Polysaccharides - pharmacology; Immunologic Factors - chemistry; Immunologic Factors - isolation & purification; Immunologic Factors - pharmacology; Macrophages - cytology; Macrophages - drug effects; Macrophages - immunology; Mice; Phagocytosis - drug effects; Physicochemical properties; RAW 264.7 Cells; Ultrasonic Waves
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2019.11.196

An efficient ultrasonic disruption extraction (UDE) of polysaccharides from Armillariamellea (AM) were optimized by response surface methodology (RSM). Under optimum conditions: ultrasonic power 915.00 W, temperature 69.27 °C and time 39.13 min, the crude polysaccharides (AMPs) yield was 19.5%. Two purified fractions AMPs-1-1 and AMPs-2-1 were obtained through anion-exchange and gel chromatography. AMPs-1-1 was a heteropolysaccharide with average molecular weights of 1.23 × 105 Da, and composed of Glc, Gal and GlcA with mole percentages of 89.06%, 9.59% and 1.34%, respectively, owning a backbone structure of (1→)-β-d-Glcp, (1 → 3,6)-α-d-Glcp and (1 → 3)-β-d-Glcp residues. AMPs-2-1 was a heteropolysaccharide with average molecular weights of 6.76 × 104 Da, and composed of Glc, Gal, GlcA and Man with mole percentages of 65.28%, 22.87%, 2.87% and 8.98%, containing a main backbone chain of (1 → 3,6)-α-d-Glcp and (1 → 6)-β-d-Glcp residues. AMPs-2-1 possessed obviously antioxidant activities in terms of stronger scavenging activity against DPPH· and ABTS+⋅, higher FRAP and ORAC value than AMPs-1-1. AMPs-2-1 could promote splenocyte lymphocytes and RAW264.7 macrophages proliferation and enhanced the phagocytosis of macrophages, exhibited significant immunomodulatory activities. These results suggested that UDE is an effective extract technology, and AMPs-2-1 could be explored as potential natural antioxidants and immunomodulatory agents. •An effective ultrasonic disruption extraction process was optimized by response surface method.•Two homogeneous polysaccharide components had been isolated from wild Armillariamellea.•Characteristic of polysaccharide was characterized by HPGPC, HPLC, GC–MS, IR, NMR.•AMPs-2-1 showed notable antioxidant and immunomodulatory activities.