AUTHOR=Ji Xiaolong , Guo Jianhang , Pan Feibing , Kuang Fengjun , Chen Haiming , Guo Xudan , Liu Yanqi 

TITLE=Structural Elucidation and Antioxidant Activities of a Neutral Polysaccharide From Arecanut (Areca catechu L.)

JOURNAL=Frontiers in Nutrition

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2022.853115

DOI=10.3389/fnut.2022.853115

ISSN=2296-861X

ABSTRACT=<p>A novel neutral polysaccharide designated as PAP1b was isolated from <italic>Areca catechu</italic> L. by hot water extraction, ethanol precipitation, and column chromatography. PAP1b was mainly composed of mannose, galactose, xylose, and arabinose in a ratio of 4.1:3.3:0.9:1.7, with an average molecular weight of 37.3 kDa. Structural characterization indicated that the backbone of PAP1b appeared to be composed mainly of → 6-β-Man<italic>p</italic>-(1 →, → 4)-α-Gal<italic>p</italic>-(1 → and → 3,6)-β-Man<italic>p</italic>-(1 →) residues with some branches, and terminal of (1 →)-linked-β-Man<italic>p</italic> residues. The results of bioactivity experiments showed that PAP1b had antioxidant <italic>in vitro</italic>, esspecially on scavenging DPPH and hydroxyl radicals. Therefore, the polysaccharide from <italic>Areca catechu</italic> L. could be used as a potential antioxidant in functional food.</p>