The objective of this study was to evaluate the antioxidant and anti-inflammatory activity of vinegar with added sea tangle (Laminaria japonica) (VAST). To determine the antioxidant activity, DPPH and ABTS radical scavenging activity, reducing power, and total polyphenolic and flavonoid contents were evaluated. The anti-inflammatory activity was determined using lipopolysaccharide (LPS) induced macrophage (RAW 264.7). Finally, the antioxidant and anti-inflammatory activities of VAST were compared with those of vinegar without added sea tangle (VNAST). The antioxidant activity, total polyphenol content, and total flavonoid content were all higher in VAST than in VNAST. Moreover, neither VAST nor VNAST displayed toxicity toward RAW 246.7 cells at up to 200-fold dilution. In LPS-induced RAW 264.7 cells, VAST treatment significantly decreased the production of nitric oxide and inflammatory cytokine (TNF-α) compared with VNAST treatment. Overall, VAST showed exhibited superior antioxidant and anti-inflammatory activities compared with VNAST. These results clearly indicate that VAST has the potential for use as an anti-oxidant and anti-inflammatory agent in functional foods. Key words:sea tangle vinegar, radical scavenging, total polyphenol contents, nitric oxide inhibition, inflammatory cytokine inhibition
For the effective use of red seabream, the texture between red seabream muscles cultured by feeding and starving were compared. Moisture and crude lipid contents of red seabream muscle cultured by starving (RCS) were 72.7% and 3.7%, respectively, which was 3% higher in the moisture compared to that of red seabream muscle cultured by feeding (RCF), while 3% lower in the crude lipid. The hardness of RCS was 0.93 kg/cm 2 , which was higher than that (0.47 kg/cm 2) of RCF. No differences in total collagen content, acetic acid-solublized collagen content, its thermal denaturation temperature and SDS-PAGE patterns between RCS and RCF were found. The results suggested that the difference in muscle texture between RCS and RCF was probably due to the difference of lipid content.
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