Fractionation and structural characterization of polysaccharides derived from red grape pomace

Xiao, Dong; Chang, Zhu; Huang, Guoqing; Xiao, Jun-Xia

doi:10.1016/j.procbio.2021.06.022

Cited by 55 publications

(27 citation statements)

References 40 publications

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“…The weak absorption at approximately 2939 cm −1 resulted from the stretching vibration of CH, 50 and the peak at 1444 cm −1 was due to the bending vibration of CH 19 . The peak at 1736 cm −1 represented the stretching vibration of COOR moieties 51 . The strong signal at 1610 cm −1 was assigned to the C═O stretching vibration of uronic acid, 52 further confirming the monosaccharide composition analysis results.…”

Section: Resultssupporting

confidence: 75%

Extraction optimization, physicochemical property, antioxidant activity, and α‐glucosidase inhibitory effect of polysaccharides from lotus seedpods

Shu

Liang

et al. 2022

J Sci Food Agric

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BACKGROUND Lotus seedpods are an agricultural by‐product of lotus (Nelumbo nucifera Gaertn.), which is widely cultivated in Southeast Asia and Australia. Most lotus seedpods are considered waste and are abandoned or incinerated, resulting in significant waste of resources and heavy environmental pollution. For recycling lotus seedpods, the extraction optimization, physicochemical properties, antioxidant activity, and α‐glucosidase inhibitory effect of the polysaccharides contained therein were investigated in this study. RESULTS Hot water extraction of lotus seedpod polysaccharides was optimized by using a response surface methodology combined with a Box–Behnken design, with the optimum conditions being as follows: a liquid/solid ratio of 25.0 mL g−1, an extraction temperature of 98.0 °C, and an extraction time of 138.0 min. Under these conditions, an experimental yield of 5.88 ± 0.06% was obtained. Physicochemical analyses suggested that lotus seedpod polysaccharides belong to acidic heteropolysaccharides and are principally composed of rhamnose, arabinose, galactose, glucose, mannose, and galacturonic acid. The polysaccharides content has a broad molecular weight distribution (2.15 × 105 to 1.77 × 107 Da), an α‐configuration, and mainly possesses smooth and sheet‐like structures. Biological evaluations showed that the polysaccharides possessed good scavenging activity on 2,2′‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic acid) diammonium salt, 1,1‐diphenyl‐2‐picryl‐hydrozyl, and hydroxyl radicals, and exerted an obvious inhibitory effect on α‐glucosidase activity. Moreover, the polysaccharides content was determined to be a mixed‐type noncompetitive inhibitor of α‐glucosidase. CONCLUSION The results indicate that lotus seedpod polysaccharides have potential as natural antioxidants and hypoglycaemic substitutes. This study provides the theoretical bases for the exploitation and application of polysaccharides from lotus seedpod by‐product resources. © 2022 Society of Chemical Industry.

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Section: Resultssupporting

confidence: 75%

Extraction optimization, physicochemical property, antioxidant activity, and α‐glucosidase inhibitory effect of polysaccharides from lotus seedpods

Shu

Liang

et al. 2022

J Sci Food Agric

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“…The peak at around 1614 cm −1 was assigned to bound water [ 30 ]. The peak at approximately 1370 cm −1 was related to the bending vibration of C-H [ 31 ]. The signal peak at about 1070 cm −1 was ascribed to the symmetric stretching vibration of the C-O-C [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Acetylation Modification, Characterization, and Anticomplementary Activity of Polysaccharides from Rhododendron dauricum Leaves

Sun

Jin

et al. 2022

Polymers

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This study focuses on the acetylation modification of polysaccharides from Rhododendron dauricum leaves (RDPs) with a high degree of substitution (DS) and then discusses their characterization and biological activity. The optimum acetylation conditions of RDPs were optimized by response surface methodology, which were reaction time 3 h, reaction temperature 50 °C, and the liquid-solid ratio 16 mL/g. Under the optima schemes, two eco-friendly acetylated polysaccharides from R. dauricum leaves (AcRDP-1 with DS of 0.439 ± 0.025 and AcRDP-2 with DS of 0.445 ± 0.022) were prepared. The results of structural characterization showed that the AcRDP-1 (9.3525 × 103 kDa) and AcRDP-2 (4.7016 × 103 kDa) were composed of mannose, glucose, galactose, and arabinose with molar ratios of 1.00:5.01:1.17:0.15 and 1.00:4.47:2.39:0.88, respectively. Compared with unmodified polysaccharides, the arabinose content and molecular weight of the two acetylated polysaccharides decreased, and their triple helix conformation disappeared, and further improved their anticomplementary activity. The two acetylated polysaccharides showed stronger a complement inhibition effect than the positive drug by blocking C2, C3, C4, C5, C9, and factor B targets in the classical and alternative pathways. This research indicated that acetylation modification could effectively enhance the anticomplementary activity of RDPs, which is beneficial for the development and utilization of R. dauricum leaves.

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“…FTIR (Jasco FT/IR-6800, Japan) was used to detect the molecular structure of extracted polysaccharides [11].…”

Section: Fourier-transform Infrared Spectroscopy (Ftir) Analysismentioning

confidence: 99%

Date (Phoenix dactylifera L.) polysaccharides: prebiotic potential & health properties, a Clinical Trial

Khorasgani

2022

Preprint

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Polysaccharides are among the most abundant biopolymers with glycosidic linkages and diverse branches. They have shown many biological activities, including prebiotic and hypoglycemic effects, anti-inflammation, and gut microbiota modulation. In this study, date flesh polysaccharide (DFP) and date seed polysaccharide (DSP) were extracted using the ultrasonic-alkaline extraction method. Chemical structure, functional properties, prebiotic potential, and metabolite formation of Lactobacillus plantarum and Bifidobacterium animalis subsp. lactis with extracted polysaccharides were investigated. Structural analysis of DSP showed substitution of mannose and conformation of galactopyranosyl, mannopyranosyl, and xylopyranosyl, while DFP showed D-glucosyl residues with β configuration with galactopyranosyl and rhamnopiranosyl groups. DSP showed a strong proliferation effect on B. animalis (9.32 ± 0.05 log CFU.g− 1) and L. plantarum (8.66 ± 0.06 log CFU.g− 1). Moreover, B. animalis produced higher short-chain fatty acids when cultured with DSP. Results of a 28-day date fruit (50 gr/day) or date seed (30 gr/day) powder intervention (TRN: IR.UI.REC.1400.023, 2021.07.17) on blood biomarkers revealed that date seed powder could significantly reduce TG, CRP, FBS, and increase RBC and RDW (p < 0.05). Taken together, DSP had a higher prebiotic, hypoglycemic and anti-inflammatory potential compared to DFP. Therefore, date polysaccharides could be further developed as a potential functional product.

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Fractionation and structural characterization of polysaccharides derived from red grape pomace

Cited by 55 publications

References 40 publications

Extraction optimization, physicochemical property, antioxidant activity, and α‐glucosidase inhibitory effect of polysaccharides from lotus seedpods

Extraction optimization, physicochemical property, antioxidant activity, and α‐glucosidase inhibitory effect of polysaccharides from lotus seedpods

Acetylation Modification, Characterization, and Anticomplementary Activity of Polysaccharides from Rhododendron dauricum Leaves

Date (Phoenix dactylifera L.) polysaccharides: prebiotic potential & health properties, a Clinical Trial

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Fractionation and structural characterization of polysaccharides derived from red grape pomace

Cited by 55 publications

References 40 publications

Extraction optimization, physicochemical property, antioxidant activity, and α‐glucosidase inhibitory effect of polysaccharides from lotus seedpods

Extraction optimization, physicochemical property, antioxidant activity, and α‐glucosidase inhibitory effect of polysaccharides from lotus seedpods

Acetylation Modification, Characterization, and Anticomplementary Activity of Polysaccharides from Rhododendron dauricum Leaves

Date (Phoenix dactylifera L.) polysaccharides: prebiotic potential &amp; health properties, a Clinical Trial

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Date (Phoenix dactylifera L.) polysaccharides: prebiotic potential & health properties, a Clinical Trial