In:
Journal of the Science of Food and Agriculture, Wiley, Vol. 103, No. 2 ( 2023-01-30), p. 738-749
Abstract:
Exopolysaccharide biopolymers produced by microorganisms are crucial to the environment. They contribute to areas such as the health and bionanotechnology sectors, food and cosmetic industries as gelling agents, and environmental sector as flocculants owing to their biodegradability and non‐toxic nature. The current study aimed to isolate the fraction of released exopolysaccharide (rEPS) by Bacillus velezensis SN‐1 from Chinese Da‐Jiang. RESULTS The weighted average molecular weight of the major isolated component, rEPS‐2, was 202 kDa, and its monosaccharide composition included mannose, glucose, and galactose at a molar ratio of 0.38:0.30:0.32. Further, the rEPS‐2 was characterized using methylation analysis and one‐dimensional/two‐dimensional nuclear magnetic resonance (1D/2D NMR) spectroscopy. In vivo hepatoprotective effects indicated that rEPS‐2 could alleviate carbon tetrachloride (CCl 4 )‐induced liver injury in mice by lowering the activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and the malondialdehyde (MDA) levels. Furthermore, rEPS‐2 can increase the expression of antioxidant genes HO‐1, GCLC and NQO1 in the Nrf2/ARE signaling pathway, thereby increasing the activity of antioxidant enzymes superoxide dismutase (SOD), glutathione peroxidase (GSH‐Px) and reduced catalase (CAT) in liver cells. Furthermore, the rEPS‐2 can be used and modulate the gut microbiota of mice with liver injury caused by CCl 4 . CONCLUSIONS These results suggest that rEPS‐2 has promising potential to serve as hepatoprotective agents. © 2022 Society of Chemical Industry.
Type of Medium:
Online Resource
ISSN:
0022-5142
,
1097-0010
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2001807-1
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