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- W3204757564 abstract "Background: The oxidative stress (OS) and antioxidants play a key role in the pathogenesis of inflammatory diseases such as fever which is promoted by the production of reactive oxygen species and impaired antioxidant defense mechanisms. The Kheaw-Hom remedy is popularly used as anti-pyretic drug in Thai traditional medicine. Objective: To investigate antioxidant activity of the ethanolic and aqueous extracts of Kheaw-Hom remedy and its plant ingredients by three assays such as DPPH, ABTS radical scavenging assays and NBT dye reduction assay. Material and Method: The extract procedures were maceration method with 95% ethanol, dried by an evaporator, or the decoction by boiling in water, filtrated, dried by lyophilizer. In the preliminary studies, all extracts were evaluated for antioxidant activity through two chemical assays: DPPH radical-scavenging and ABTS radical-scavenging assay, as well as through cell-based assay: scavenging capacity of intracellular ROS in HL-60 cells using the NBT reduction. Results: The ethanolic extract of Khaew-Hom remedy showed higher antioxidant activity using DPPH and ABTS assays but it had no antioxidant activity using cell-based assay (EC50 =16.96, 30.91 and IC50 >100 μg/mL, respectively). The ethanolic extract of Cyathea gigantea and Tacca chantrieri showed the highest antioxidant activity using DPPH assay with EC50 = 7.55 and 8.00 μg/mL, respectively. The ethanolic extract of Dracaena loureiri and Globba malaccensis exhibited the best antioxidant activity using ABTS radical scavenging with EC50 = 7.88 and 8.06 μg/mL, respectively. For the NBT dye reduction assay, only the ethanolic and aqueous extracts of Tacca chantrieri were effective having IC50 = 63.38 and 70.65 μg/mL, respectively. Conclusion: The ethanolic of Khaew-Hom showed antioxidant activity only with chemical based assay but both ethanolic and aqueous extracts of Tacca chantrieri (rhizome) showed high antioxidant activities on chemical-based and cell line-based assay. Thus, this plant should be developed to be health products in the future. Keywords: Antioxidant activities, Kheaw-Hom, DPPH, ABTS, NBT assay, HL-60" @default.
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- W3204757564 date "2017-06-01" @default.
- W3204757564 modified "2023-09-23" @default.
- W3204757564 title "In Vitro Free Radical Scavenging and Cell-Based Antioxidant Activities of Kheaw-Hom Remedy Extracts and Its Plant Ingredients" @default.
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