Hemicellulosic Polysaccharides From Bamboo Leaves Promoted by Phosphotungstic Acids and Its Attenuation of Oxidative Stress in HepG2 Cells

Zhuqian Xiao; Jiajie Li; Hongpeng Wang; Qiang Zhang; Qing Ge; Jianwei Mao; Ruyi Sha

doi:10.3389/fnut.2022.917432

Hemicellulosic Polysaccharides From Bamboo Leaves Promoted by Phosphotungstic Acids and Its Attenuation of Oxidative Stress in HepG2 Cells

Front Nutr. 2022 Jun 13:9:917432. doi: 10.3389/fnut.2022.917432. eCollection 2022.

Authors

Zhuqian Xiao^{1

2}, Jiajie Li¹, Hongpeng Wang¹, Qiang Zhang¹, Qing Ge¹, Jianwei Mao¹, Ruyi Sha¹

Affiliations

¹ Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Zhejiang University of Science and Technology, Hangzhou, China.
² College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China.

Abstract

In this work, we exploited an efficient method to release hemicellulosic polysaccharides (BLHP) from bamboo (Phyllostachys pubescens Mazel) leaves assisted by a small amount of phosphotungstic acid. Structural unit analysis proved that BLHP-A1 and BLHP-B1 samples possessed abundant low-branch chains in →4)-β-_D-Xylp-(1→ skeleton mainly consisting of Xylp, Manp, Glcp, Galp, and Araf residues. According to the results of the antioxidant activity assays in vitro, both of the two fractions demonstrated the activity for scavenging DPPH⋅ and ABTS⁺ radicals and exhibited relatively a high reducing ability compared to the recently reported polysaccharides. Moreover, the antioxidant activities of purified polysaccharides were evaluated against H₂O₂-induced oxidative stress damage in HepG2 cells. BLHP-B1 showed more activity for preventing damages from H₂O₂ in HepG2 cells by improving the enzyme activities of SOD, CAT, and GSH-Px and decreasing the production of MDA as well as suppressing reactive oxygen species (ROS) formation. This study implied that BLHP could demonstrate its attenuation ability for oxidative stress in HepG2 cells.

Keywords: HepG2 cells; bamboo leaves; hetero-polysaccharides; oxidative stress; phosphotungstic acid.