Protective Effect of Oak Extracts on Oxidative Stress Induced by Hydrogen Peroxide

Nam, Jeong Bin; Park, Hyung Bin; Jung, Ji Young; Yang, Jung Wook

doi:10.5658/wood.2014.42.5.523

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…1. The total polyphenol contents of the extracts were 0.16, 0.26, 0.36, 0.58 and 1.07 mg/mL, respectively which were lower than those of the untreated oak wood extracts, as well as those of other treatments (Nam et al, 2014).…”

Section: Discussionmentioning

confidence: 63%

Evaluation of Antioxidant Activities of Water Extract from Microwave Torrefied Oak Wood

Nam¹,

Oh²,

Yang³

2018

Journal of the Korean Wood Science and Technology

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The aim of this study was to assess the in vitro potential of water extract from torrefied oak wood as a natural antioxidant. The antioxidant potential of the extracts was assessed by employing different in vitro assays, including reducing power, DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)], and FRAP (ferric reducing antioxidant potential) assays. The DPPH activity of the extract was increased in a dosedependent manner. Measurement of total flavonoid content of water extract from torrefied oak wood was achieved using an aluminum chloride colorimetric assay; the extract contained 192.12 mg/g flavonoid, which was significantly high when compared with standard quercetin. The results obtained in this study indicate that water extract from torrefied oak wood has significant potential for use as a natural antioxidant agent.

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Section: Discussionmentioning

confidence: 63%

Evaluation of Antioxidant Activities of Water Extract from Microwave Torrefied Oak Wood

Nam¹,

Oh²,

Yang³

2018

Journal of the Korean Wood Science and Technology

Self Cite

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“…However, the extracts are few published report (Nam et al 2014) in the literature about the anti-apoptotic activity.…”

Section: Introductionmentioning

confidence: 99%

Anti-apoptotic Effect of Steam Exploded Quercus variabilis

Jo¹,

Jung²,

Nam³

et al. 2015

Journal of the Korean Wood Science and Technology

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We hypothesized that the extract from steam exploded Q. variabilis might be cytoprotective for tenofibroblasts cells during oxidative stress. In the present study, the extracts obtained from steam exploded (severity log Ro 4.68) Q. variabilis contained high quantities of phenolics and flavonoids contents. Also, the extracts appear to have, on these tenofibroblasts, a protective effect against oxidative stress. Tenofibroblasts cells incubated with the extracts and stressed with H2O2 showed an increase in cell viability by MTT assay. The extracts is found to inhibit H2O2-induced apoptosis in tenofibroblasts cells, as shown by Annexin V/PI double staining analysis. Western blot data showed that in the extracts/H2O2-treated cells, the extracts inhibited the H2O2-dependent phosphorylation of ERK and p38. From these results, it is suggested that the extracts showed the protective effect on H2O2-mediated oxidative stress. The main chemical compounds of the extract was identified as 1,8-cineole by GC-MS analysis. The anti-apoptosis activity is accordingly believed to be attributable to the 1,8-cineole.

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Protective Effect of Oak Extracts on Oxidative Stress Induced by Hydrogen Peroxide

Cited by 2 publications

References 15 publications

Evaluation of Antioxidant Activities of Water Extract from Microwave Torrefied Oak Wood

Evaluation of Antioxidant Activities of Water Extract from Microwave Torrefied Oak Wood

Anti-apoptotic Effect of Steam Exploded Quercus variabilis

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