alexa Structural characterization of a homogalacturonan from Capparis spinosa L. fruits and anti-complement activity of its sulfated derivative.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Glycomics & Lipidomics

Author(s): Wang H, Wang H, Shi S, Duan J, Wang S

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Abstract A water-soluble polysaccharide CSPS-2B-2 with a molecular mass of 8.8 kDa, was obtained from the fruits of Capparis spinosa L. Chemical and NMR spectral analysis verified CSPS-2B-2 was a linear poly-(1-4)-α-D-galactopyranosyluronic acid in which 12.9±0.4\% of carboxyl groups existed as methyl ester and 2.6±0.1\% of D-GalpA residues were acetylated. A sulfated derivative Sul-2B-2 with a sulfation degree of 0.88±0.02 was prepared via the substitution of C-2 and/or C-3 of GalpA residues in CSPS-2B-2. Bioassay on the complement and coagulation system demonstrated that Sul-2B-2 (CH(50): 3.5±0.2 μg/mL) had a stronger inhibitory effect on the activation of complement system through the classic pathway than that of heparin (CH(50): 8.9±0.3 μg/mL). Interestingly, Sul-2B-2 at low dose even middle dose (for example 52 μg/mL) had no effect on coagulation system, which was totally different from heparin. Thus, our observation indicated that Sul-2B-2 was more efficient than heparin in inhibiting the activation of the complement system through classical pathway and exhibiting a relatively less anti-coagulant activity. These results suggested that the sulfated derivative Sul-2B-2 prepared from the homogalacturonan in the fruits of Capparis spinosa L, might be a promising drug candidate in case of necessary therapeutic complement inhibition. This article was published in Glycoconj J and referenced in Journal of Glycomics & Lipidomics

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