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Polysaccharide isolated from wax apple suppresses ethyl carbamate-induced oxidative damage in human hepatocytes. / 莲雾多糖对氨基甲酸乙酯诱导人肝细胞氧化损伤的抑制作用研究.
Bao, Tao; Karim, Naymul; Ke, Huihui; Tangpong, Jitbanjong; Chen, Wei.
Affiliation
  • Bao T; Department of Traditional Chinese Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China.
  • Karim N; Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China.
  • Ke H; Department of Traditional Chinese Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China.
  • Tangpong J; Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China.
  • Chen W; Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China.
J Zhejiang Univ Sci B ; 24(7): 574-586, 2023 Jul 15.
Article in En, Zh | MEDLINE | ID: mdl-37455135
Wax apple (Syzygium samarangense) has received growing research interest for its high nutritional and medicinal value due to its constituents such as polysaccharide, organic acids, flavonoids, minerals, and other substances. In this study, wax apple polysaccharide (WAP) was isolated from this plant and its protective effect against ethyl carbamate (EC)|-induced oxidative damage was evaluated in human hepatocytes (L02 cells). Firstly, a series of analyses such as high-performance liquid chromatography (HPLC), high-performance gel permeation chromatography (HPGPC), Fourier transform infrared spectroscopy (FT-IR), gas chromatography/mass spectrometry (GC/MS), and 1H and 13C nuclear magnetic resonance (NMR) were conducted to identify the structure of WAP. Thereafter, in vitro cell experiments were performed to verify the protective effects of WAP against EC-induced cytotoxicity, genotoxicity, and oxidative damage in L02 cells. Our results revealed that WAP is composed of mannose, rhamnose, glucuronic acid, galacturonic acid, glucose, galactose, arabinose, and fucose in a molar ratio of 2.20:|3.94:|4.45:|8.56:|8.86:|30.82:|39.78:|1.48. Using a combination of methylation and NMR spectroscopic analysis, the primary structure of WAP was identified as Araf-(1→, Glcp-(1→, →2)|-Araf-(1→, →3)|-Galp-(1→, →3)|-Araf-|(1→, and →6)|-Galp-|(1→. Cell experiments indicated that WAP exhibited significant protective effects on EC-treated L02 cells via suppressing cytotoxicity and genotoxicity, reducing reactive oxygen species (ROS) and O2•- formation, as well as improving mitochondrial membrane potential (MMP) and glutathione (GSH). In a nutshell, WAP has the potential as an important therapeutic agent or supplement for hepatic oxidative damage. Meanwhile, further studies are needed to prove the above effects in vivo at the biological and clinical levels.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Syzygium Limits: Humans Language: En / Zh Journal: J Zhejiang Univ Sci B Journal subject: BIOLOGIA / MEDICINA Year: 2023 Document type: Article Affiliation country: China Country of publication: China

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Syzygium Limits: Humans Language: En / Zh Journal: J Zhejiang Univ Sci B Journal subject: BIOLOGIA / MEDICINA Year: 2023 Document type: Article Affiliation country: China Country of publication: China