Abstract
Chenopodium album L. (CAL) has many bioactive compounds and pharmacological activities. Fermentation is the preferred modification method of releasing target bioactive. We prepared two crude polysaccharides: SLC (the polysaccharide from the unfermented stem and leaves of CAL) and FSLC (the polysaccharide from the fermented stem and leaves of CAL). In vitro antioxidant and composition of SLC and FSLC were compared, and the effects of FSLC on antioxidant activity in the IPEC-J2 cells model and development-promoting activity in the zebrafish model were evaluated. The results revealed that FSLC possesses stronger DPPH, hydroxyl radical scavenging, and reducing power than SLC. The levels of total polysaccharide, polyphenol, and flavonoid, as well as the molar ratio of glucuronic acid increased in FSLC. Compared with SLC, the relative contents of protocatechuic acid, protocatechualdehyde, gentisic acid, vanillic acid, p-coumaric acid, quercetin, ferulic acid methyl ester, hispidulin, diosmetin, cinnamic acid, isorhamnetin, syringic acid and kaempferol in FSLC increased. In IPEC-J2 cells, antioxidant enzyme activities and GSH levels were significantly increased, while the MDA level was reduced by treatment with 0.25 mg/mL FSLC. In the zebrafish model, treatment with 25 ~ 300 μg/mL of FSLC had no harmful impact on the morphology and viability of embryos at 12 ~72 hpf. At 48 and 60 hpf, treatment with 100 ~ 300 μg/mL FSLC increased the hatching rate of embryos. At 72hpf, treatment with 100 ~ 300 μg/mL FSLC could relieve morphological abnormalities caused by LPS in zebrafish and improve the hatching rate of embryos. Together, these results provide useful information on the potential for applying polysaccharides from the stems and leaves of CAL as natural feed additives to exert its antioxidant and development-promoting functions.Graphical
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