Comparative Analysis of Characteristics and <i>in Vitro</i> Biological Activities of <i>Cordyceps militaris</i> Polysaccharide Prepared by Two Methods

GU Dandan; HOU Jingyu; ZHANG Jinxiu; WANG Lian

doi:10.13386/j.issn1002-0306.2022110183

Volume 44 Issue 18

Sep. 2023

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Science and Technology of Food Industry > 2023 > 44(18): 76-83. > DOI: 10.13386/j.issn1002-0306.2022110183

GU Dandan, HOU Jingyu, ZHANG Jinxiu, et al. Comparative Analysis of Characteristics and in Vitro Biological Activities of Cordyceps militaris Polysaccharide Prepared by Two Methods[J]. Science and Technology of Food Industry, 2023, 44(18): 76−83. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2022110183.

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Comparative Analysis of Characteristics and in Vitro Biological Activities of Cordyceps militaris Polysaccharide Prepared by Two Methods

1.
College of Chemical Engineering, Shijiazhuang University, Shijiazhuang 050035, China
2.
College of Life Sciences, Hebei Normal University, Shijiazhuang 050024, China

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Received Date: November 16, 2022
Available Online: July 12, 2023

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Abstract

Abstract

Cordyceps militaris polysaccharides from the fermentation broth were prepared via chitosan flocculation and water extraction and alcohol precipitation methods to obtain the flocculated polysaccharide (XDT) and alcohol precipitation polysaccharide (CDT) respectively. The extraction yields, component content, average particle sizes and solubility of XDT and CDT were comparatively investigated. The microstructures, functional groups and spatial conformations were characterized by scanning electron microscopy, Fourier infrared spectroscopy and Congo red assay. The antioxidant activity was evaluated by scavenging ability of DPPH, superoxide anion and hydroxyl radical. The hypoglycemic activity was estimated by α-glucosidase inhibitory ability, and the antitumor cell activity was analyzed by inhibition of HepG2 cell proliferation. The results showed a yield of 3.58% for XDT, 1.91 times that of CDT. CDT and XDT exhibited different microstructures under electron microscopy, and similar absorption patterns under infrared spectrum, while XDT contained more triple helix structures than CDT. XDT displayed smaller average particle sizes but a faster dissolution rate than CDT. In vitro antioxidant tests showed that XDT exhibited significantly higher scavenging ability of DPPH, superoxide anion and hydroxyl radical than CDT at the same concentration. There was no significant difference between the XDT and CDT in the inhibition of α-glucosidase at low concentration, but XDT showed significantly higher inhibition than CDT as the increase of concentration. XDT was found to be a stronger inhibitor of HepG2 cells proliferation than CDT at the same treatment concentration. In summary, XDT showed higher yields, smaller average particle sizes, faster solubility, and higher antioxidant, hypoglycemic, and antitumor activity in vitro.

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