1. Anti-gastric cancer activity of cultivated Dendrobium huoshanense stem polysaccharide in tumor-bearing mice: Effects of molecular weight and O-acetyl group.
- Author
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Liu B, Li QM, Shang ZZ, Zha XQ, Pan LH, and Luo JP
- Subjects
- Angiogenesis Inhibitors chemistry, Angiogenesis Inhibitors pharmacology, Animals, Antineoplastic Agents, Phytogenic chemistry, Apoptosis drug effects, Cell Line, Tumor, Disease Models, Animal, Humans, Immunologic Factors chemistry, Immunologic Factors pharmacology, Magnetic Resonance Spectroscopy, Male, Mice, Molecular Structure, Molecular Weight, Plant Extracts chemistry, Polysaccharides chemistry, T-Lymphocytes drug effects, T-Lymphocytes immunology, T-Lymphocytes metabolism, Xenograft Model Antitumor Assays, Antineoplastic Agents, Phytogenic pharmacology, Dendrobium chemistry, Plant Extracts pharmacology, Plant Stems chemistry, Polysaccharides pharmacology
- Abstract
The present study aimed at assuring whether homogeneous cultivated Dendrobium huoshanense stem polysaccharide (cDHPS) could inhibit gastric cancer in vivo, and whether its anti-gastric cancer activity could be affected by its molecular weight and O-acetyl group. Three different fractions (cDHPS-I, cDHPS-II and cDHPS-III) with decreased molecular weights and one fraction (cDHPS-IV) without O-acetyl group were prepared from cDHPS. Their structures were identified systematically. The backbone of cDHPS-I-III was the same as that of cDHPS, while their relative molecular weights displayed a decreasing order as follows: cDHPS > cDHPS-I > cDHPS-II > cDHPS-III. The backbone of cDHPS-IV was similar to those of cDHPS and cDHPS-I-III, but with the absence of O-acetyl groups. Animal experiments exhibited that cDHPS and cDHPS-I-IV could significantly inhibit tumor growth, induce tumor cell apoptosis, suppress tumor angiogenesis and enhance T cell immune response of murine forestomach carcinoma (MFC) tumor-bearing mice. Moreover, all the above effects of cDHPS and cDHPS-I-IV on MFC tumor-bearing mice exhibited a decreasing order as follows: cDHPS > cDHPS-I > cDHPS-II > cDHPS-III > cDHPS-IV. The results suggest that cDHPS could inhibit gastric cancer in vivo, and its anti-gastric cancer activity was closely linked with its molecular weight and O-acetyl group., (Copyright © 2021 Elsevier B.V. All rights reserved.)
- Published
- 2021
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