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Chemical structure and anti-aging bioactivity of an acid polysaccharide from Rose buds


An acid polysaccharide, named as R-PL, was extracted from rose buds by hot water (80◦C) extraction and purified by Sephadex G-200. R-PL, extracted with a total yield of 1.90 %, is a highly pure polysaccharide with a total sugar content of 92.51 %. A single and symmetrically sharp peak in the high-performance gel-permeation chromatography (HPGPC) figure indicated that it was a kind of homogeneous polysaccharide with molecular weight of 7.727x105 Da. Monosaccharide composition analysis showed that it was consisted of D-arabinose: D-xylose: D-glucose: D-galactose: D-galacturonic acid and D-glucuronic acid with a molar ratio of 4.6:1.4: 5.22:4.81:1:1.86. Structure analysis such as FT-IR, periodic acid oxidation, Smith degradation, methylation and NMR analysis revealed that R-PL had a backbone of →1)-α-D-Glcp-(6→ with side chains of →1)-β-D-Galp-(4,6→, →1)-β-D-Araf-(5→, →1)-α-D-Xylp-(4→, →1)-α-D-GlcpA-(2→ and →1)-α-D-GalpA-(4→. Its morphology characteristics were identified by Congo-red experiment and Scanning electron microscope (SEM) analysis. Results showed that R-PL did not existed triple-helical conformation in solution and the shape was like twisted ribbons. The anti-oxidative and anti-aging analysis showed that R-PL had significantly antioxidant and anti-aging ability in vivo.

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Publication details

The article was received on 29 Jan 2018, accepted on 05 Mar 2018 and first published on 06 Mar 2018

Article type: Paper
DOI: 10.1039/C8FO00206A
Citation: Food Funct., 2018, Accepted Manuscript
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    Chemical structure and anti-aging bioactivity of an acid polysaccharide from Rose buds

    Y. Tang, Y. Zhu, Y. Liu, H. Sun, Q. song and Y. Zhang, Food Funct., 2018, Accepted Manuscript , DOI: 10.1039/C8FO00206A

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