Chemical structure and molecular weight influence the in vitro fermentability of polysaccharide extracts from the edible seaweeds Himathalia elongata and Gigartina pistillata

Mateos‐Aparicio, Inmaculada; Martera, Giulia; Goñi, Isabel; Villanueva-Suárez, María José; Redondo-Cuenca, Araceli

doi:10.1016/j.foodhyd.2018.05.016

Cited by 37 publications

(10 citation statements)

References 33 publications

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“…Bands of minor intensity identified at 890 1/cm were assigned to the α- l -guluronic asymmetric ring vibration, and at 820 1/cm to the β-mannuronic acid. These spectra are consistent with those previously reported for extracts from H. elongata using conventional Soxhlet extraction [ 30 ]. It should be remarked that FTIR-ATR spectra of alginates from previous studies of other Fucales species extracted with different methods (water, acid, enzymatic extraction) did not show relevant differences either [ 31 ].…”

Section: Resultssupporting

confidence: 92%

Functional Features of Alginates Recovered from Himanthalia elongata Using Subcritical Water Extraction

2021

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Subcritical water extraction of Himanthalia elongata and the subsequent acetone fractionation to precipitate crude fucoidans generated a liquid phase which was used to recover alginates with a wide range of viscoelastic features and other soluble extracts with potential biological activities. The precipitated alginate was converted to sodium alginate using an environmentally friendly treatment before being characterized by Fourier transform infrared attenuated total reflectance, nuclear magnetic resonance, high performance size exclusion chromatography and rheological measurements. The cell viability of three human cell lines (A549, HCT-116, T98G) in the presence of the extracts obtained before and after acetone fractionation was assessed. Fractionation with different acetone volumes showed a slight effect in the behavior of the different tested cell lines. Results also indicated a notable effect of the processing conditions on the block structure and molar mass of the extracted biopolymer, with the subsequent impact on the rheological properties of the corresponding gelled matrices.

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Section: Resultssupporting

confidence: 92%

Functional Features of Alginates Recovered from Himanthalia elongata Using Subcritical Water Extraction

2021

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“…Another weak signal was recorded at 2938 cm −1 , indicating the existence of C-H stretching vibrations of the pyranoid ring and C6 groups of fucose [ 33 ]. The peak near 1640 cm −1 was attributed to asymmetric stretching vibrations of carboxylate (O-C-O), which probably correlated with the uronic acids that are present in fucoidan [ 34 ]. The band at 1425 cm −1 indicated the existence of asymmetrical bending C-H vibrations for glucose, fucose, xylose, and mannose [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

Chemical Characterization and Immunomodulatory Activity of Fucoidan from Sargassum hemiphyllum

Zhou

Chen

et al. 2022

Marine Drugs

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Fucoidan is a sulfated algal polyanionic polysaccharide that possesses many biological activities. In this paper, a fucoidan (SHF) polysaccharide was extracted from Sargassum hemiphyllum collected in the South China Sea. The SHF, with a molecular weight of 1166.48 kDa (44.06%, w/w), consisted of glucose (32.68%, w/w), galactose (24.81%, w/w), fucose (20.75%, w/w), xylose (6.98%, w/w), mannose (2.76%, w/w), other neutral monosaccharides, and three uronic acids, including glucuronic acid (5.39%, w/w), mannuronic acid (1.76%, w/w), and guronuronic acid (1.76%, w/w). The SHF exhibited excellent immunostimulatory activity. An immunostimulating assay showed that SHF could significantly increase NO secretion in macrophage RAW 264.7 cells via upregulation of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) levels based on both gene expression and protein abundance. These results suggest that SHF isolated from Sargassum hemiphyllum has great potential to act as a health-boosting ingredient in the pharmaceutical and functional-food fields.

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“…Sometimes it corresponds to GlcA actually comprising the fucoidan structure, but sometimes it corresponds to contamination with alginic acid (e.g., Finch et al, 1986;Lorbeer et al, 2017), a polysaccharide present in all of the brown seaweeds studied so far. By the same token, the Glc present in the samples should almost certainly correspond to contaminating laminarans (Lorbeer et al, 2017;Mateos-Aparicio et al, 2018). Only in a few cases, Glc has been shown to be part of the fucoidan structure (e.g., Duarte et al, 2001).…”

Section: Discussionmentioning

confidence: 98%

A Comprehensive and Comparative Analysis of the Fucoidan Compositional Data Across the Phaeophyceae

Ponce

Stortz

2020

Front. Plant Sci.

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In the current review, compositional data on fucoidans extracted from more than hundred different species were surveyed through the available literature. The analysis of crude extracts, purified extracts or carefully isolated fractions is included in tabular form, discriminating the seaweed source by its taxonomical order (and sometimes the family). This survey was able to encounter some similarities between the different species, as well as some differences. Fractions which were obtained through anion-exchange chromatography or cationic detergent precipitation showed the best separation patterns: the fractions with low charge correspond mostly to highly heterogeneous fucoidans, containing (besides fucose) other monosaccharides like xylose, galactose, mannose, rhamnose, and glucuronic acid, and contain low-sulfate/high uronic acid proportions, whereas those with higher total charge usually contain mainly fucose, accompanied with variable proportions of galactose, are highly sulfated and show almost no uronic acids. The latter fractions are usually the most biologically active. Fractions containing intermediate proportions of both polysaccharides appear at middle ionic strengths. This pattern is common for all the orders of brown seaweeds, and most differences appear from the seaweed source (habitat, season), and from the diverse extraction, purification, and analytitcal methods. The Dictyotales appear to be the most atypical order, as usually large proportions of mannose and uronic acids appear, and thus they obscure the differences between the fractions with different charge. Within the family Alariaceae (order Laminariales), the presence of sulfated galactofucans with high galactose content (almost equal to that of fucose) is especially noteworthy.

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Chemical structure and molecular weight influence the in vitro fermentability of polysaccharide extracts from the edible seaweeds Himathalia elongata and Gigartina pistillata

Cited by 37 publications

References 33 publications

Functional Features of Alginates Recovered from Himanthalia elongata Using Subcritical Water Extraction

Functional Features of Alginates Recovered from Himanthalia elongata Using Subcritical Water Extraction

Chemical Characterization and Immunomodulatory Activity of Fucoidan from Sargassum hemiphyllum

A Comprehensive and Comparative Analysis of the Fucoidan Compositional Data Across the Phaeophyceae

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