title: Structural elucidation and in vitro antioxidant activities of a new heteropolysaccharide from Litchi chinensis.
abstract: Two polysaccharides, LCP70S-1 and LCP70W, were isolated from the pulp tissues of Litchi chinensis by anion-exchange chromatography and gel-filtration chromatography, while the structure of LCP70S-1 was elucidated and its physico-chemical properties was analyzed. The results demonstrated that LCP70S-1 is composed of L-rhamnose, L-arabinose and D-galactose in the ratio of 1.06:6.39:4.21, and the main chain of the heteropolysaccharide possess (1→3,6)-linked galactopyranosyl branches at O-6. The three branches consist of (1→3)-linked rhamnopyranosyl residues, (1→3,6)-linked galactopyranosyl and (1→5)-linked arabinopyranosyl residues, and terminated with (1→)-linked arabinopyranosyl residues, respectively. The two polysaccharides were further evaluated with 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activities and their reducing power in vitro. The results showed that LCP70W and LCP70S-1 possessed significant antioxidant activities, especially for LCP70S-1. As such, LCP70S-1 could potentially serve as an antioxidant and would value further study for human healthcare.
authors.affiliation: Biotechnological Institute of Chinese Materia Medica, Jinan University.
authors.forename: Xuqiao
authors.initials: X
authors.lastname: Hu
authors.forename: Jinlin
authors.initials: J
authors.lastname: Wang
authors.forename: Yongshuai
authors.initials: Y
authors.lastname: Jing
authors.forename: Liyan
authors.initials: L
authors.lastname: Song
authors.forename: Jianhua
authors.initials: J
authors.lastname: Zhu
authors.forename: Xinlu
authors.initials: X
authors.lastname: Cui
authors.forename: Rongmin
authors.initials: R
authors.lastname: Yu
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D032125:Litchi / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D013055:Spectrophotometry, Infrared
chemical_list: D000975:Antioxidants; D011134:Polysaccharides