1. Fractionation, characterization, and assessment of nutritional and immunostimulatory protein-rich polysaccharide-protein complexes isolated from Lentinula edodes mushroom.
- Author
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Zhao ZC, Gu FT, Li JH, Zhu YY, Huang LX, and Wu JY
- Subjects
- Mice, Animals, RAW 264.7 Cells, Fungal Proteins chemistry, Fungal Proteins isolation & purification, Polysaccharides chemistry, Polysaccharides pharmacology, Polysaccharides isolation & purification, Molecular Weight, Nutritive Value, Adjuvants, Immunologic pharmacology, Adjuvants, Immunologic chemistry, Chemical Fractionation, Shiitake Mushrooms chemistry
- Abstract
This study aimed to fractionate and characterize the protein-rich polysaccharide-protein (PSP) complexes from a well-known edible mushroom, Lentinula edodes, and assess their nutritional and immunostimulatory properties. Crude PSP isolated from the mushroom water extract was purified by anion exchange chromatography, yielding fractions PSP-F1 and PSP-F2 containing 66.1 % and 74.0 % protein, respectively. Both fractions exhibited primarily β-sheet and random-coil protein structures, though the crude PSP fraction exhibited an additional α-helix structure. On SDS-PAGE, PSP-F1 showed two molecular weight bands, one below 10 kDa and another at 34 kDa, and PSP-F2 showed several bands, one below 10 kDa and others between 34 and 95 kDa. The nutritional value of essential and non-essential amino acid profiles was in the order of PSP-F2 > PSP-F1 > crude PSP; the amino acid ratio coefficient values of the crude PSP, PSP-F1, and PSP-F2 were 63 %, 67 %, and 72 %, respectively. The combination of PS and PSP fractions exhibited stronger immunoactivity than PSP-F1 or PSP-F2 alone. PSP-F2 showed a higher immunostimulatory activity than PSP-F1 in RAW264.7 cell culture. PSP-F2 was also more abundant of easily absorbed high-quality proteins. The results provide useful references for dietary and medicinal uses of PSP fractions in L. edodes and other edible mushrooms., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Jian Yong WU reports was provided by The Hong Kong Polytechnic University. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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