Abstract
Marine-derived antioxidant polysaccharides have aroused extensive attention because of their potential nutritional and therapeutic benefits. However, the comprehensive comparison of identified marine-derived antioxidant polysaccharides is still inaccessible, which would facilitate the discovery of more efficient antioxidants from marine organisms. Thus, this review summarizes the sources, chemical composition, structural characteristics, and antioxidant capacity of marine antioxidant polysaccharides, as well as their protective in vivo effects mediated by antioxidative stress reported in the last few years (2013–2019), and especially highlights the dominant role of marine algae as antioxidant polysaccharide source. In addition, the relationships between the chemical composition and structural characteristics of marine antioxidant polysaccharides with their antioxidant capacity were also discussed. The antioxidant activity was found to be determined by multiple factors, including molecular weight, monosaccharide composition, sulfate position and its degree.
Highlights
Oxygen is a key substance in the normal metabolic activities of aerobic organisms [1]
The high diversity of microalgal extracellular polysaccharides (EPS) are attributed to the regulation of polysaccharide biosynthesis in microalgae to adapt to different environmental conditions, which benefits the discovery of antioxidant polysaccharides and the investigation of their structural and activity relationships [124]
We found that antioxidant capacity of polysaccharides derived from marine organisms
Summary
Oxygen is a key substance in the normal metabolic activities of aerobic organisms [1]. There have been concerns over the safety of synthetic antioxidants, antioxidants derived naturally are attracting more attention Natural products, such as carotenoids, tocopherols, and flavonoids show strong antioxidant activity in scavenging free radicals and relieving cellular damage caused by oxidation and have been added in health supplements, food additives, and pharmaceuticals [10,11,12]. Another group of naturally-derived chemicals, polysaccharides, have attracted wide attention because of their promising in vitro and in vivo biological activity [13,14,15,16,17]. The relationships between the chemical structure and antioxidant activity of these polysaccharides will be discussed
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