Abstract
A polysaccharide from Arnebia euchroma (Royle) Johnst. named ARP, was obtained and purified by the hot water extraction, ethanol precipitation and deproteinization of TCA. The molecular weight of the polysaccharide fraction of ARP was calculated to be 1.23 × 104 Da from a calibration curve obtained with dextran standards. Monosaccharide composition analysis revealed that ARP was composed of Gal, Ara, Glu, Man, Rha and Fuc at a molar ratio of 53.8:21.3:11.7:6.8:4.3:2.2. Methylation analysis suggested that ARP was likely an arabinogalactan and that its backbone mainly consisted of Galp residues of 1,6‑linkages and Ara residues of 1,5‑ or 1,3‑linkages. The in vitro experiment indicated that ARP enhanced B- and T-lymphocyte proliferation. A dose-dependent relationship was observed, and a dose of 200 μg/mL resulted in the highest cell viability. In addition, ARP significantly stimulated the production of the cytokine, interferon-γ (IFN-γ), and enhanced B- and T-lymphocyte proliferation. Meanwhile, ARP had little effect on interleukin-2 (IL-2) production. The experiments of the effect of ARP on the activation of macrophage in vitro indicated that ARP significantly enhanced the production of TNF-α, IL-6 and IL-1β which suggested the polysaccharide induced the functional activation of macrophage.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Biological Macromolecules
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
