The physicochemical, antioxidant, hypoglycemic and prebiotic properties of γ-irradiated polysaccharides extracted from Lentinula edodes

Chaomin Yin; Chen Li; Kun Ma; Xiuzhi Fan; Fen Yao; Defang Shi; Wenjing Wu; Jianhui Qiu; Guoyuan Hu; Hong Gao

doi:10.1007/s10068-022-01234-5

The physicochemical, antioxidant, hypoglycemic and prebiotic properties of γ-irradiated polysaccharides extracted from Lentinula edodes

Food Sci Biotechnol. 2023 Jan 25;32(7):987-996. doi: 10.1007/s10068-022-01234-5. eCollection 2023 Jun.

Authors

Chaomin Yin¹, Chen Li^{1

2}, Kun Ma¹, Xiuzhi Fan¹, Fen Yao¹, Defang Shi¹, Wenjing Wu¹, Jianhui Qiu¹, Guoyuan Hu², Hong Gao^{1

3}

Affiliations

¹ National Research and Development Center for Edible Fungi Processing (Wuhan), Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, 430064 China.
² School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205 China.
³ Research Center of Under-Forest Economy in Hubei Province, Wuhan, 430064 China.

Abstract

In this study, the influence of γ-irradiation with different dose (0, 4, 8, and 16 kGy) on chemical composition, physicochemical features and bioactivities of polysaccharides extracted from Lentinula edodes (LEP) were investigated. The carbohydrate content (from 59.47 to 70.96%), the solubility, the ⋅OH and DPPH scavenging ability of LEP increased with the increased γ-irradiation dose, while the protein content, the weight-average and number-average molecular weight of LEP were significantly decreased with the increased γ-irradiation dose. Moreover, γ-irradiation treatment caused LEP color changes and surface topography destroyed. γ-Irradiated LEP showed higher hypoglycemic activities in vitro than that of non-irradiated LEP. Moreover, γ-irradiated LEP had better proliferation promoting effects on Lactobacillus rhamnosus and L. plantarum. These results showed that γ-irradiation treatment changes the physicochemical features of LEP, thus affects its antioxidant, hypoglycemic and prebiotic properties, which suggests that γ-irradiated LEP has potential application in the pharmaceutical industries and functional foods.

Supplementary information: The online version contains supplementary material available at 10.1007/s10068-022-01234-5.

Keywords: Antioxidant; Hypoglycemic activity; Polysaccharides; Prebiotic proliferation; γ-Irradiation.

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