On the galactosyl distribution of commercial galactomannans

Daas, Piet; Schols, Henk A.; Jongh, H.H.J. de

doi:10.1016/s0008-6215(00)00209-3

Cited by 128 publications

(73 citation statements)

References 14 publications

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“…The peak eluting near the gel exclusion volume correspond to undigested polysaccharides, namely pectic polysaccharides and xyloglucans, shown to be present in Et75A fraction by linkage analysis (Table 2). It is possible that this material also comprises mannan moieties with structural features that hinder the enzyme action, such as branching points and acetylation (Daas, Schols, & de Jongh, 2000;Simões et al, 2010Simões et al, , 2012Simões, Nunes, Domingues, & Coimbra, 2011).…”

Section: Structural Characterization Of P Tridentatum Galactomannansmentioning

confidence: 99%

In vitro macrophage nitric oxide production by Pterospartum tridentatum (L.) Willk. inflorescence polysaccharides

Martins

Simões

Ferreira

et al. 2017

Carbohydrate Polymers

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a b s t r a c tPterospartum tridentatum (L.) Willk. decoctions of dried inflorescences are used in Portugal due to their claimed beneficial properties for various health disorders. To disclose the potential contribution of its polysaccharides to health benefits, in this work, hot water extracts from P. tridentatum inflorescences were prepared and fractionated by ethanol precipitation and anion exchange chromatography. The fraction rich in acetylated galactomannans evidenced an increase in nitric oxide (NO) production by macrophages. This activity decreased 60-75% after saponification, confirming that acetylation is an important structural feature for this biological property. In addition, the treatment of pectic polysaccharides with endopolygalacturonase showed that type-I and type-II arabinogalactans, as well as low molecular weight galacturonans and xyloglucans, may also contribute to macrophage NO production. Thus, the polysaccharides present in P. tridentatum dried inflorescences may contribute to the health beneficial properties frequently attributed to the decoctions of this plant.

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Section: Structural Characterization Of P Tridentatum Galactomannansmentioning

confidence: 99%

In vitro macrophage nitric oxide production by Pterospartum tridentatum (L.) Willk. inflorescence polysaccharides

Martins

Simões

Ferreira

et al. 2017

Carbohydrate Polymers

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“…The average ratio of galactose to mannose (Gal: Man) is variable, depending on the plant source, and ranges from 1: 4.5 in cassia (Cassia tora) to 1: 1 in fenugreek (Trigonella foenum-graecum) http://dx.doi.org/10.1016/j.carbpol.2016.02.007 0144-8617/© 2016 Elsevier Ltd. All rights reserved. (Crescenzi et al, 2004;Daas, Schols, & de Jongh, 2000;Daas, Grolle, van Vliet, Schols, & de Jongh, 2002;Daniel, Whistler, Voragen, & Pilnik, 1994;Liyanage, Abidia, Auldb, & Moussa, 2015;McCleary, Clark, Dea, & Rees, 1985;Merlini, Boccia, Mendichi, & Galante, 2015;Sittikijyothin, Torres, & Gonç alves, 2005;Wei et al, 2015). This peculiar structure makes them fairly soluble in water at different temperatures, flexible in application and chemically/biochemically quite reactive (Cheng, Prud'homme, Chick, & Rau, 2002).…”

mentioning

confidence: 99%

An aerogel obtained from chemo-enzymatically oxidized fenugreek galactomannans as a versatile delivery system

Rossi

Campia

Merlini

et al. 2016

Carbohydrate Polymers

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a b s t r a c tWe describe a new aerogel obtained from laccase-oxidized galactomannans of the leguminous plant fenugreek (Trigonella foenum-graecum) and suggest its potential practical use.Laccase/TEMPO oxidation of fenugreek in aqueous solution caused a viscosity increase of over 15-fold. A structured, elastic, stable hydrogel was generated, due to formation of carbonyl groups from primary OH of galactose side units and subsequent establishment of hemiacetalic bonds with available free hydroxyl groups.Upon lyophilization of this hydrogel, a water-insoluble aerogel was obtained (EOLFG), capable of uptaking aqueous or organic solvents over 20 times its own weight. The material was characterized by scanning electron microscopy, FT-IR, elemental analysis and 13 C CP-MAS NMR spectroscopy and its mechanical properties were investigated.To test the EOLFG as a delivery system, the anti-microbial enzyme lysozyme was used as model active principle. Lysozyme was added before or after formation of the aerogel, entrapped or absorbed in the gel, retained and released in active form, as proven by its hydrolytic glycosidase activity on lyophilized Micrococcus lysodeikticus cells wall peptidoglycans.This new biomaterial, composed of a chemo-enzymatically modified plant polysaccharide, might represent a versatile, biocompatible "delivery system" of active principles in food and non-food products.

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“…This "fine structure" of the polymers seems to vary even among variants of the same species [28]. Different patterns have been described, such as periodic [6,28], random [28][29][30] or hybrid [28,31].…”

Section: Introductionmentioning

confidence: 99%

“…Size-exclusion chromatography is usually employed for the estimation of the molecular-weight distributions [13,32], while 13 C-NMR combined with enzymatic hydrolysis are used for the determination of the galactose distribution on the backbone [28,[33][34][35][36]. The M/G ratios are commonly obtained by gas chromatography, liquid chromatography or 1 H-NMR, on intact or hydrolyzed PGMs [13,[37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Quantification of Sugar Epimers in Polygalactomannans by ESI-MS/MS

2015

J Anal Bioanal Tech

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On the galactosyl distribution of commercial galactomannans

Cited by 128 publications

References 14 publications

In vitro macrophage nitric oxide production by Pterospartum tridentatum (L.) Willk. inflorescence polysaccharides

In vitro macrophage nitric oxide production by Pterospartum tridentatum (L.) Willk. inflorescence polysaccharides

An aerogel obtained from chemo-enzymatically oxidized fenugreek galactomannans as a versatile delivery system

Quantification of Sugar Epimers in Polygalactomannans by ESI-MS/MS

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