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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Chemical structure and immunoinhibitory activity of a pectic polysaccharide containing glucuronic acid from the leaves of Diospyros kaki
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Chemical structure and immunoinhibitory activity of a pectic polysaccharide containing glucuronic acid from the leaves of Diospyros kaki

机译：柿叶中含有葡糖醛酸的果胶多糖的化学结构和免疫抑制活性

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摘要

Pectin is a family of complex polysaccharides characterized by the presence of 1,4-linked alpha-galacturonic acid residues in the backbone and is more recognized for its potential bioactive properties. Herein we reported the structural and biological features of a pectic fraction DL-4OAC-1 from the leaves of Diospyros kaki. Chemical and spectral analysis revealed this polysaccharide possessed a backbone composed of a repeating disaccharide [-> 4)-alpha-GalAp-(1 -> 2)-alpha-Rhap-(1 ->], substituted at some O-4 of Rhap residues and O-3 of GalAp residues by the side chains consisting of Araf, Galp, Xylp, and in particular terminal GlcAp residues. The immunological assay in vitro showed that this distinct pectic fraction could inhibit the LPS-induced B lymphocyte proliferation and had no effect on the ConA-induced T lymphocyte proliferation.
机译：果胶是一类复杂的多糖，其特征是在主链中存在1,4-连接的α-半乳糖醛酸残基，并且因其潜在的生物活性而得到更多的认可。在这里，我们报道了柿叶的果胶级分DL-4OAC-1的结构和生物学特征。化学和光谱分析表明，该多糖具有由重复的二糖[-> 4）-alpha-GalAp-（1-> 2）-alpha-Rhap-（1->]组成的骨架，并在Rhap的O-4处取代。侧链由Araf，Galp，Xylp，特别是末端GlcAp残基组成的GalAp残基残基和O-3的体外免疫学分析表明，这种独特的果胶级分可以抑制LPS诱导的B淋巴细胞增殖，并且没有对ConA诱导的T淋巴细胞增殖的影响。

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