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Physicochemical Characterization of a Polysaccharide from Tratt Fruit and Its Antitumor Activity by Activating ROS Mediated Pathways

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Date 2022 Sep 26
PMID 36161228
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Abstract

Tratt fruit is a highly valued fruit that contains abundant functional and nutritional constituents. In this study, a novel polysaccharide, named RTFP-1, was isolated and purified from Tratt fruit. Structural characterization indicated that RTFP-1 was a homogeneous heteropolysaccharide with the molecular weight (Mw) of 128.7 kDa and consisted of arabinose, galactose, glucose, mannose, xylose, and fucose with molar ratio percentages of 34.84, 40.59, 12.11, 5.06, 3.39, and 4.01%, respectively. A CCK-8 assay indicated that RTFP-1 inhibited the cell growth of HepG2 cells in a dose-dependent manner. Morphological analysis and flow cytometry experiment showed that RTFP-1 promoted the apoptosis of HepG2 cells and increased reactive oxygen species (ROS) level. The underlying molecular mechanisms indicated that RTFP-1 activated the apoptosis of HepG2 cells through ROS-mediated MAPK, STAT, and p53 apoptotic pathways. These results suggest that RTFP-1 might be a potential chemopreventive and antitumor agent.

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