Arabinan and arabinan-rich pectic polysaccharides from quinoa (Chenopodium quinoa) seeds: Structure and gastroprotective activity

被引：85

作者：

Cordeiro, Lucimara M. C. ^{[1
]}

Reinhardt, Vanessa de Fatima ^{[1
]}

Baggio, Cristiane H. ^{[2
]}

de Paula Werner, Maria Fernanda ^{[2
]}

Burci, Ligia Moura ^{[2
]}

Sassaki, Guilherme L. ^{[1
]}

Iacomini, Marcello ^{[1
]}

机构：

[1] Univ Fed Parana, Dept Bioquim & Biol Mol, BR-81531980 Curitiba, PR, Brazil

[2] Univ Fed Parana, Dept Farmacol, BR-81531980 Curitiba, PR, Brazil

来源：

FOOD CHEMISTRY | 2012年 / 130卷 / 04期

关键词：

Arabinan; Arabinan-rich pectic polysaccharides; Chenopodium quinca; Gastroprotective activity; RAPID METHOD; PSEUDOCEREALS; ENDOSPERM;

D O I：

10.1016/j.foodchem.2011.08.020

中图分类号：

O69 [应用化学];

学科分类号：

070301 [无机化学];

摘要：

After removal of starch, cell wall polysaccharides of seeds of quinoa were studied. They were extracted successively with water and with aq. 10% KOH. The extracted polysaccharides were fractionated and purified by freeze-thaw treatment and by sequential ultrafiltration through membranes. The purified fractions (PQW, K2-30EM, K1-10RM and K1-30RM) were analyzed by sugar composition, HPSEC, methylation and C-13 NMR spectroscopy analysis. The results showed that PQW consisted of a linear arabinan with (1 --> 5)-linked alpha-L-arabinofuranosyl units. Fractions K2-30EM, K1-10RM and K1-30RM were related to rhamnogalacturonan type I with a branched arabinan and galactan side-chains. This arabinan has (1 5)-linked alpha-L-arabinofuranosyl units substituted exclusively in O-3. The main differences between these fractions were their molecular mass and content of Rha and GalA, which probably arise from an increase in their rhamnogalacturonan backbone. A pool of these polysaccharides (arabinan and arabinan-rich pectic polysaccharides) showed gastroprotective activity on ethanol-induced acute gastric lesions in rats. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：937 / 944

页数：8

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