Structural features and immunostimulating effects of three acidic polysaccharides isolated from Panax quinquefolius.

Abstract:

:Three acidic polysaccharides (PPQA2, PPQA4 and PPQA5) were successfully purified from the water-extracted crude polysaccharides of Panax quinquefolius by combination of DEAE Sepharose and Sephacryl S-300 chromatography. The average molecular weights (Mws) of PPQA2, PPQA4 and PPQA5 were 2.3×10(4) Da, 1.2×10(5) Da, and 5.3×10(3) Da, respectively. Monosaccharides components analysis indicated that PPQA2 and PPQA5 were composed of arabinose, rhammose, mannose, galactose, glucose, galacturonic acid and glucuronic acid in a molar percent of 8.0:4.0:2.9:7.2:12.5:26.6:38.8 and 8.5:3.2:5.3:10.8:32.4:15.5:24.4. PPQA4 was composed of arabinose, rhammose, mannose, galactose, glucose and glucuronic acid in a molar percent of 19.7:5.1:8.1:23.9:41.3:2.0. The (13)C NMR spectra indicated the existence of O-acetyl groups in PPQA2 and PPQA5, while absence in PPQA4. The in vitro study showed that PPQA2, PPQA4 and PPQA5 were all able to stimulate the production of secretory molecules (NO, TNF-α, and IL-6) of RAW264.7 murine macrophages in a dose-dependent manner. These findings suggest that the three acidic polysaccharides isolated in our study have immunopotentiating effects on macrophages and should be used as a beneficial health food.

journal_name

Int J Biol Macromol

authors

Wang L,Yao Y,Sang W,Yang X,Ren G

doi

10.1016/j.ijbiomac.2015.06.007

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

77-86

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(15)00409-2

journal_volume

80

pub_type

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