Mucilage chemical profile and antioxidant properties of giant swamp taro tubers

Nguimbou, Richard Marcel; Boudjeko, Thaddée; Njintang, Nicolas Yanou; Himeda, Makhlouf; Scher, Joël; Mbofung, Carl Moses

doi:10.1007/s13197-012-0906-6

Cited by 29 publications

(31 citation statements)

References 36 publications

(40 reference statements)

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“…In the present study, both amadumbe and okra dry mucilage extracts appreciably scavenged DPPH free radical (Figure a) and reduced ferric ion (Figure b) in vitro, which can be attributed to the presence of phenolics in both dry mucilage extracts. However, the higher ( p < 0.05) phenolic content of amadumbe mucilage compared to that of okra mucilage (39.91 ± 2.99 vs. 26.48 ± 1.05 mg/g) potentiated a stronger radical scavenging (Figure a and Table ) and ferric reducing activity (Figure b), especially at 2 mg/mL extract concentration (Figure b; p < 0.05) (Nguimbou et al, ; Shahidi & Wanasundara, ).…”

Section: Resultsmentioning

confidence: 98%

“…However, the inhibitory potentials of amadumbe mucilage on glucose absorption have not yet been studied. Furthermore, the ferric reducing and chelating antioxidant activity of mucilage extracted from a species of amadumbe (giant swamp taro) has been reported, which was attributed to the presence of phenolics (Nguimbou et al, ). In addition to their anti‐oxidative potency, phenolics could also inhibit carbohydrate (Tan et al, ) and lipid (Yang, Chin, Yoon, & Kim, ) digestion and modulate muscle glucose uptake (Egawa et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…The potential pharmaceutical applications of both amadumbe and okra mucilages in drug delivery have previously been demonstrated (Farooq, Malviya, & Sharma, 2013 ). Furthermore, several studies have shown that mucilages extracted from amadumbe and okra possess anti-hyperglycemic, anti-oxidative and anti-obesogenic potentials (Hajian et al, 2016 ;Nguimbou et al, 2014 ;Palanuvej, Hokputsa,Tunsaringkarn, & Ruangrungsi, 2009 ).…”

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confidence: 99%

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A comparative study on the physicochemical, anti-oxidative, anti-hyperglycemic and anti-lipidemic properties of amadumbe (Colocasia esculenta ) and okra (Abelmoschus esculentus ) mucilage

2018

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We investigated the physicochemical and bioactive properties of amadumbe (Colocasia esculenta) and okra (Abelmoschus esculentus) dry mucilage extracts. Protein (340 mg/g) and phenolic (40 mg/g) contents of amadumbe mucilage were 3 and 1.5 times those of okra mucilage, respectively. Amadumbe mucilage had slightly higher neutral sugar content than okra mucilage. By 1H NMR fingerprints, rhamnopyranosyl residues were peculiar to okra mucilage. Amadumbe mucilage showed stronger radical scavenging (IC50, 2.55 ± 0.30 vs. 3.01 ± 0.74 mg/mL), α‐glucosidase (IC50, 1.60 ± 0.17 vs. 3.28 ± 0.5 mg/mL) and pancreatic lipase (IC50, 1.63 ± 0.15 vs. 2.45 ± 0.24 mg/mL) inhibition and glucose uptake activity, perhaps due to higher phenolic content. Okra mucilage exhibited stronger intestinal glucose absorption inhibition (IC50, 0.54 ± 0.24 vs. 1.82 ± 0.24 mg/mL), possibly due to higher viscosity. Data suggest that amadumbe and okra mucilage may be useful dietary supplements for managing oxidative stress, hyperglycemia, overweight and obesity. Practical applications The present study reported some anti‐hyperglycemic and anti‐lipidemic potentials of dry mucilage extracted from amadumbe corm and okra pods as well as the possible modes of actions. This study is of great relevance because it can be a notable reference for further investigation on the potential use of these mucilage extracts as dietary components and/or supplements for managing hyperglycemia, overweight and obesity, thus increasing utilization and consequently improving the economic values of these traditional plants.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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A comparative study on the physicochemical, anti-oxidative, anti-hyperglycemic and anti-lipidemic properties of amadumbe (Colocasia esculenta ) and okra (Abelmoschus esculentus ) mucilage

2018

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“…The data obtained in our study reveals the antioxidant potentials of mucilage rich extracts of B. orellana leaf and twigs samples. The earlier reports on mucilage antioxidant potentials from giant swamp taro tubers with effective concentrations of 1.42 ± 0.04 mg/ml in yellow sections of giant taro and chelating concentrations ranging from 0.39 to 0.43 EDTA equivalents (Nguimbou et al, ). However, the present results show an effective concentration of 1.2–2.9 mg/ml concentration for chelating metal ions by leaf and twig MPS extracts.…”

Section: Discussionmentioning

confidence: 96%

Mucilaginous polysaccharides from vegetative parts ofBixa orellanaL.: Their characterization and antioxidant potential

2018

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The aim of this study was to extricate adhesive mucilaginous polysaccharides (MPS) from vegetative parts of Bixa orellana and furthermore to explore proximate analysis and antioxidant potentials. The ethanol precipitated mucilage concentrates of leaf holds 57.7% ± 3.2% moisture, 31.7 ± 1.61 g/100 g aggregate starch content, 23.6 ± 0.07 g/100 g reducing sugar content, 14.5 ± 2.0 g/100 g pentose content, 9.37 ± 0.56 g/100 g uronic acid substance, 10.6 ± 0.98 g/100 g total phenolic content, and 36.9 ± 0.52 mg/100 g total protein content. In contrasted with twigs, the leaves MPS demonstrated two folds increment in phenolic content. The sugar composition characteristics of MPS by gas liquid chromatography demonstrated a noteworthy content of xylose (163.5 ± 6.6 mg/100 g), mannose (17.2 ± 0.6 mg/100 g), and galactose (13.7 ± 0.4 mg/100 g) in leaf. The MPS extract of leaves exhibited a dose‐dependent antioxidant activity and free radical scavenging ability. The data obtained in this study open a new avenue to further investigate the broad applications of these annatto dye yielding plant polysaccharides. Practical applications The mucilaginous polysaccharides (MPS) from plant sources are being used for different applications in food, pharma, and cosmetic enterprises. Nowadays there is a developing enthusiasm for MPS for their dietary and medicinal advantages. Particularly dietary polysaccharides are known to evoke immunomodulatory and anti‐inflammatory properties. Here, we present the leaf and twig parts of Bixa orellana as rich sources of MPS, the MPS characterization and also antioxidant potential, which could substantiate B. orellana MPS as functional ingredients and furthermore in nourishment industry for expanding dairy foods consistency.

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“…The TP content in the extracts was determined using Folin-Ciocalteu colorimetry as described previously [13] . In each replicate, 1 ml of the diluted extract solution, 1 ml of Folin-Ciocalteu reagent and 20 ml of 20% Na 2 CO 3 were mixed together and vortexed.…”

Section: Determination Of Tp Contentmentioning

confidence: 99%

Optimization of Total Polyphenols Extraction from Vigna angularis and Their Antioxidant Activities

Zhang¹,

Wang²

2016

IJPS

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Zhang and Wang: Total Polyphenols from Vigna angularis and their EffectsVigna angularis, also called adzuki bean, a member of the family Fabaceae, has long been cultivated in Asian countries. This legume has received considerable attention owing to the presence of polyphenols. The optimal extraction conditions for total polyphenols from V. angularis and their antioxidant activities were investigated in this study. Ultrasound-assisted extraction was used to optimize the extraction of total polyphenols from V. angularis. Factors that influenced the extraction efficiency, such as ethanol concentration, liquid-solid ratio, and ultrasonic time were investigated by Box-Behnken design. Folin-Ciocalteu colorimetry was adopted to determine the total polyphenol content by using gallic acid as a reference. Antioxidant activities of the total polyphenols were evaluated by 1,1-diphenyl-2-picrylhydrazyl, hydroxyl and superoxide radical-scavenging activity assays. The optimized extraction conditions were as follows: ethanol concentration of 44.3%; liquidsolid ratio of 21.6:1 and ultrasonic extraction time of 30 min. Under these optimal conditions, the model's predicted extraction efficiency was 4.19 mg/g. The mathematical model had a high correlation (P<0.05) and could be employed to extract total polyphenols from V. angularis. In vitro antioxidant activity results showed that total polyphenols had strong antioxidant capacity and could be used as potential antioxidant agents. This study provided a reference for the exploration of new natural antioxidants. Key words: Vigna angularis (Adzuki bean), total polyphenols, extraction, Box-Behnken design, response surface methodology, antioxidant activityThe extraction of phytochemicals from food plants using solvents is an important step in separation and bioactivity research. Thus, efficient extraction techniques are required to harvest the natural products. Ultrasound-assisted extraction (UAE) is an efficient extraction technique that can help solutes more rapidly diffuse from the solid material into the solvent [1] . UAE has been widely used owing to its high efficiency, shorter processing time and reduced solvent consumption.Vigna angularis, also called adzuki beans, a member of the family Fabaceae, is an important food crop and used as folk medicines in Asian countries [2] . V. angularis have relatively small beans (about 5 mm). Most of the adzuki beans cultivated in Eastern Asian countries are red in color. This legume is rich in dietary fibers, proteins, minerals, vitamin A, vitamin B9 and folate [3] . Due to its biochemical components, V. angularis has been evaluated as a new treatment option. In addition, it has received considerable attention owing to the presence of polyphenols, such as proanthocyanidins and quercetin [4] . Numerous studies have demonstrated that polyphenols possess antioxidant [5,6] , anticarcinogenic [7,8] , antiglycation [9] and neuroprotective [10] properties. However, there are no data relating to optimized extraction conditions of total polyphenols (T...

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Mucilage chemical profile and antioxidant properties of giant swamp taro tubers

Abstract: .05 mg/mL; YP 1.42±0.04 mg/mL) were lower than those of citric acid (1.58±0.04 mg/mL). Generally mucilage from the WP and YP sections are excellent sources of chelating agents.

Cited by 29 publications

References 36 publications

A comparative study on the physicochemical, anti-oxidative, anti-hyperglycemic and anti-lipidemic properties of amadumbe (Colocasia esculenta ) and okra (Abelmoschus esculentus ) mucilage

A comparative study on the physicochemical, anti-oxidative, anti-hyperglycemic and anti-lipidemic properties of amadumbe (Colocasia esculenta ) and okra (Abelmoschus esculentus ) mucilage

Mucilaginous polysaccharides from vegetative parts ofBixa orellanaL.: Their characterization and antioxidant potential

Optimization of Total Polyphenols Extraction from Vigna angularis and Their Antioxidant Activities

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