Antioxidant Effects of Herbal Tea Leaves from Yacon (<i>Smallanthus sonchifolius</i>) on Multiple Free Radical and Reducing Power Assays, Especially on Different Superoxide Anion Radical Generation Systems

Sugahara, Shintaro; Ueda, Yuto; Fukuhara, Kenzo; Kamamuta, Yuki; Matsuda, Yasushi; Murata, Toshiaki; Kuroda, Yasuhiro; Kabata, Kiyotaka; Ono, M.; Igoshi, Keiji; Yasuda, Shin

doi:10.1111/1750-3841.13092

Cited by 33 publications

(29 citation statements)

References 64 publications

(96 reference statements)

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“…Furthermore, as phenolic acid and flavonoid compounds may contribute to ABTS radical scavenging activity of yacon leaves, the higher amount of ABTS radical scavenging activity obtained in the present study is in agreement with higher amounts of TFC and TPC extracted compared to findings of De Andrade et al [ 9 ]. ABTS radical scavenging activity of aqueous extracts of yacon leaves has been also studied using EC 50 methodology in study of Sugahara et al which cannot be compared to the results of present study due to differences in analytical methods [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, there was a week positive correlation between DPPH radical scavenging activity and TFC ( R = 0.350, Table 5 ). DPPH radical scavenging activity of yacon leaves extract was studied according to EC 50 methodology by other researches [ 9 , 36 ]. Due to differences in analytical methods applied in these investigations and the present study, the results cannot be compared.…”

Section: Resultsmentioning

confidence: 99%

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Impact of Ohmic-Assisted Decoction on Bioactive Components Extracted from Yacon (Smallanthus sonchifolius Poepp.) Leaves: Comparison with Conventional Decoction

et al. 2017

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Yacon (Smallanthus sonchifolius Poepp.) leaves are a potentially rich source of bioactive compounds, such as phenolic acids and flavonoids. In this study, the effect of the extraction method (ohmic-assisted decoction (OH-DE) and decoction (DE)), yacon cultivar (red and white), and leaf age (young and old) on the quality/quantity of extracted phytochemicals were investigated. Extraction yield, energy consumption, total phenolic content (TPC), total flavonoid content (TFC), ABTS and DPPH radical scavenging activity, and ferric reducing antioxidant power (FRAP) were determined. Additionally, HPLC-DAD was used to identify the major individual phenolic and flavonoid compounds of yacon leaves. The results showed that a three-way interaction of process-variables (extraction method×yacon cultivar×age of leaves) influenced the extraction yield, TPC, TFC, ABTS, and DPPH radical scavenging activity, and FRAP, significantly (p < 0.05). However, energy consumption of the extraction process was only affected by method of extraction (p < 0.05) and was halved when OH-DE was applied as compared to DE alone. Additionally, the phytochemical quality of extracts was either improved or comparable when OH-DE was used for extraction. Also, it was shown that yacon leaves contained considerable amounts of caffeic acid, chlorogenic acid, ferrulic acid, myricetin, p-coumaric acid, and rutin, while leaves of the red cultivar had higher contents of each compound compared to leaves of the white cultivar.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Impact of Ohmic-Assisted Decoction on Bioactive Components Extracted from Yacon (Smallanthus sonchifolius Poepp.) Leaves: Comparison with Conventional Decoction

et al. 2017

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“…There was a linearity of absorbance versus concentrations with a coefficient of determination R 2 of 0.997 and 0.999 for AA and PP extract, respectively. The concentration giving the arbitrary absorbance 0.5 was assumed to be the IC 50 (Sugahara et al, ). The value of IC 50 showed that PP extract is twice higher antioxidant comparing to AA (Table ).…”

Section: Resultsmentioning

confidence: 99%

Improvement of microwave‐assisted Soxhlet extraction of bioactive compounds applied to pomegranate peels

Oualcadi

Sebban²,

Berrekhis

2020

J Food Process Preserv

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A novel Microwave‐Assisted Soxhlet Extraction (MASE) was performed to upgrade the classic Soxhlet extraction of polyphenols from pomegranate peels, one of the most studied by‐products. The response surface methodology (RSM) modeling was used for the estimation of predictive total polyphenols content (TPC), total flavonoid content (TFC), and total tannin content (TTC). Maximum compounds of the three output parameters: 376 mg gallic acid equivalents (GAE)/g dry weight (dw) TPC yield, 163 mg rutin equivalents/g dw TFC yield, and 323 mg GAE/g dw TTC yield, were obtained under optimum extraction conditions. In addition, the extract had a high antioxidant capacity of 533g ascorbic acid equivalent/g dw using 2,2‐diphenyl‐1‐picrylhydrazyl assay. The major phenolic compounds, especially punicalagin, were identified by ultra‐high‐performance liquid chromatography followed by the electrospray ionization coupled with mass spectrometry (UHPLC/ESI/MS). The proposed method (MASE) permitted to develop a fast solvent‐minimized extraction process and improve the quantity of extracts obtained from a natural resource. Practical applications The valorization of natural by‐products involves the optimization and improvement of extraction techniques. MASE is a coupling of two conventional extractions that could be used in industry to improve yields, while reducing the time and cost of extracting target bioactive compounds. With this coupling, it is possible to modify or add other factors to target a well‐defined molecule in order to obtain the richest extract in these target molecules.

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“…Reducing power with absorbance 1.0 is equal to100% of reductivity. The effective concentration obtaining 0.5 of absorbance or 50% reductivity, is assumed to be EC50 (µg/mL) (Sugahara et al, 2015).…”

Section: Determination Of Antioxidant Activitymentioning

confidence: 99%

Bioactivity analysis of Sarcolobus globosus Wall., a mangrove plant of the Sundarbans

Aunjum

Biswas

Ullah

et al. 2019

J Bangladesh Agric Univ

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The aspiring prospect for bioactive metabolites has guided this very study to screen for antioxidant, antibacterial and cytotoxic activities of leaf, and bark extracts of Sundarbans mangrove plant, Sarcolobus globosus that might lead to novel drug, agrochemicals and neutraceuticals. Methanolic bark extract of S. globosus revealed the highest antioxidant properties among all the extracts in DPPH free radical scavenging activity (IC50:26.04 µg/ml), reducing efficiency (EC50:77.72 µg/ml), total phenolic content (47.25 ± 0.002mg GAE/g of extract), total flavonoid content (101 ± 0.003 mg GAE/g of extract) and total tannin content (93.5 ± 0.007 mg GAE/g of extract). Free radical scavenging activity and reducing power are significantly correlated with total phenol, flavonoid and tannin content. For evaluation of antibacterial activity, Gram positive bacteria (Bacillus megaterium, Staphylococcus aureus, and Micrococcus sp.) and Gram negative bacteria (Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Vibrio cholerae, Salmonella paratyphi, Pseudomonas sp., and Proteus sp.) were used in disc diffusion bioassay. Both extracts possessed significant (P < 0.05) inhibition competency against most of the bacteria. Test for cytotoxic activity was carried out by means of brine shrimp lethality bioassay and the chloroformic bark extract demonstrated greater cytotoxicity (LC5019.487 µg/ml) than standard vincristine sulphate (LC50 26.68 µg/ml). Further exploration is required focusing especially the bark extract that could be utilized as source and template for the synthesis of new potential pharma and agrochemicals. J Bangladesh Agril Univ 17(4): 476–482, 2019

show abstract

Antioxidant Effects of Herbal Tea Leaves from Yacon (Smallanthus sonchifolius) on Multiple Free Radical and Reducing Power Assays, Especially on Different Superoxide Anion Radical Generation Systems

Cited by 33 publications

References 64 publications

Impact of Ohmic-Assisted Decoction on Bioactive Components Extracted from Yacon (Smallanthus sonchifolius Poepp.) Leaves: Comparison with Conventional Decoction

Impact of Ohmic-Assisted Decoction on Bioactive Components Extracted from Yacon (Smallanthus sonchifolius Poepp.) Leaves: Comparison with Conventional Decoction

Improvement of microwave‐assisted Soxhlet extraction of bioactive compounds applied to pomegranate peels

Bioactivity analysis of Sarcolobus globosus Wall., a mangrove plant of the Sundarbans

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