Abstract:
:A heteropolysaccharide, LP5, was purified from Lycium barbarum L. leaves. It was identified as a calcium-rich polysaccharide (8.6 mg calcium/g) with a molecular weight of 2.50 × 105 Da. The polysaccharide was composed of six kinds of monosaccharides, of which mannose and xylose are the main components. And it contains 16.37% glucuronic acid. Studies on RAW264.7 cells demonstrated that this polysaccharide exhibited potent immunomodulatory activity, including an increase in phagocytic activity, as well as the release of both nitric oxide and cytokines. However, after the depletion of calcium, the polysaccharide exhibited greater immunomodulatory activity (p < 0.05). Further conformation analysis confirmed that the polysaccharide changed from a compact spherical conformation to a random coil structure in aqueous solution after the depletion of calcium, which resulted in increased immunomodulatory activity by LP5.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Zhang B,Wang M,Wang C,Yu T,Wu Q,Li Y,Lv Z,Fan J,Wang L,Zhang Bdoi
10.1016/j.ijbiomac.2018.11.067subject
Has Abstractpub_date
2019-02-15 00:00:00pages
182-188eissn
0141-8130issn
1879-0003pii
S0141-8130(18)34361-7journal_volume
123pub_type
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