Journal
CARBOHYDRATE POLYMERS
Volume 202, Issue -, Pages 536-544Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.09.009
Keywords
Sulfated polysaccharides; Antrodia cinnamomea; FT-IR; NMR; Synergistic effect; Lung cancer
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Funding
- Ministry of Science and Technology, R.O.C. [MOST105-2320-B-077-002-MY3, MOHW107-NRICM-B-325-000202, MOST 106-2811-B-077 -002 -, MOST 106-2320-B-002-012-MY3]
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Antrodia cinnamomea is a polyporaceous medicinal and native fungus in Taiwan. In this study, we found that AC-SPS-F3, a sulfated glucan from A. cinnamomea, reduced lung cancer cell viability via inhibition of EGFR and mTOR activity. The co-administration of AC-SPS-F3 and cisplatin synergistically inhibited lung cancer cell viability. We identified AC-SPS-F3 was a sulfated beta-(1 -> 4)-D-glucan with two long 1,6-branches in each repeat unit. The FT-IR absorption at 1341 cm(-1) and 887 cm(-1) confirmed the existence of sulfates. The proposed repeat unit of AC-SPS-F3, including the types of main skeleton and side chains, as well as the position of the minor galactopyranosyl and mannopyranosyl residues, were proposed according to the 1D and 2D NMR spectra, shown as follows: The features for the proposed repeat unit of AC-SPS-F3 included two long beta-(1 -> 6)-Glcp branches, a very high ratio of sulfate substitution, and partial 2-O and 4-O substituents evenly distributed on the beta-(1 -> 6)-Glcp branches. The present study is first to characterize the highly branched sulfated polysaccharides and elucidates its anti-cancer functions. [GRAPHICS] .
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