Antibacterial and Antioxidant Capacities and Attenuation of Lipid Accumulation in 3T3-L1 Adipocytes by Low-Molecular-Weight Fucoidans Prepared from Compressional-Puffing-Pretreated Sargassum Crassifolium

• Published in: Marine drugs Vol. 16; no. 1; p. 24
• Main Authors: Huang, Chun-Yung, Kuo, Chia-Hung, Lee, Chia-Hsin
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 11.01.2018; MDPI
• Subjects: 3T3-L1 Cells; Accumulation; Acids; Adipocytes; Adipocytes - drug effects; Agarose; Analytical methods; Animals; Anti-Bacterial Agents - pharmacology; antibacterial; Antibacterial activity; antioxidant; Antioxidants; Antioxidants - pharmacology; Apoptosis; Ascorbic acid; Attenuation; Benzothiazoles - pharmacology; Biphenyl Compounds - pharmacology; Cell death; Cell Death - drug effects; Cell Line; Degradation; Fucoidan; Fucose; Gel electrophoresis; Gels; Hydrogen; Hydrogen peroxide; Hydrogen Peroxide - pharmacology; lipid accumulation; Lipids; low-molecular-weight fucoidan; Mice; Molecular Weight; Picrates - pharmacology; Plant Extracts - pharmacology; Polysaccharides - pharmacology; Reagents; Salts; Sargassum - chemistry; Sargassum crassifolium; Seabirds; Sulfates; Sulfonic acid; Sulfonic Acids - pharmacology; Uronic acid; Viscosity; Weight; 3T3-L1 cells; antioxidant; antibacterial; low-molecular-weight fucoidan; lipid accumulation; Sargassum crassifolium
• ISSN: 1660-3397; 1660-3397
• DOI: 10.3390/md16010024

In this study, we extracted fucoidan from compressional-puffing-pretreated by hot water. The crude extract of fucoidan (SC) was degraded by various degradation reagents and four low-molecular-weight (LMW) fucoidans, namely SCO (degradation by hydrogen peroxide), SCA (degradation by ascorbic acid), SCOA (degradation by hydrogen peroxide + ascorbic acid), and SCH (degradation by hydrogen chloride) were obtained. The degradation reagents studied could effectively degrade fucoidan into LMW fucoidans, as revealed by intrinsic viscosity, agarose gel electrophoresis, and molecular weight analyses. These LMW fucoidans had higher uronic acid content and sulfate content than those of SC. It was found that SCOA exhibited antibacterial activity. All LMW fucoidans showed antioxidant activities as revealed by DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt), and FRAP (ferric reducing antioxidant power) methods. Biological experiments showed that SC and SCOA had relatively high activity for the reversal of H₂O₂-induced cell death in 3T3-L1 adipocytes, and SCOA showed the highest effect on attenuation of lipid accumulation in 3T3-L1 adipocytes. Therefore, for the LMW fucoidans tested, SCOA showed antibacterial activity and had a high fucose content, high sulfate content, high activity for the reversal of H₂O₂-induced cell death, and a marked effect on attenuation of lipid accumulation. It can thus be recommended as a natural and safe antibacterial and anti-adipogenic agent for food, cosmetic, and nutraceutical applications.