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- W2077093438 abstract "Gastric ulcer is the most prevalent gastrointestinal disorder, resulting from oxidative stress, Helicobacter pylori infection, up-regulation of proton potassium ATPase (PPA) activity, down-regulation of gastric mucosal defense, etc. In this paper it is reported that phenolic fractions of Curcuma amada, commonly known as mango ginger, acted as potent inhibitors of PPA and H. pylori growth. Mango ginger free phenolics (MGFP) and mango ginger bound phenolics (MGBP) inhibited PPA at IC50 values of 2.2 ± 0.21 and 0.7 ± 0.08 μg/mL, respectively, exhibiting 9−27-fold better potency over lansoprazole (IC50 of 19.3 ± 2.2 μg/mL). MGFP is constituted by caffeic (26%), gentisic (24%), ferulic (20%), gallic (10%), cinnamic (7%), and protocatechuic acids (7%) and MGBP by ferulic (47%), cinnamic (29%), p-coumaric acid (11%), and syringic (5%) acids as major phenolic acids. MGFP and MGBP further exhibited free radical scavenging (IC50 of 2.2 ± 0.17 and 4.2 ± 0.36 μg/mL), reducing power abilities (193−104 units/g), inhibition of lipid peroxidation (IC50 of 10.3 ± 0.91 and 15.6 ± 1.6 μg/mL), and DNA protection (80% at 4 μg), indicating strong antioxidative properties. MGFP and MGBP thus may be potential and inexpensive multistep blockers against ulcers. Keywords: Antioxidant activity; free and bound phenolics; H+,K+-ATPase; Helicobacter pylori; Curcuma amada" @default.
- W2077093438 created "2016-06-24" @default.
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- W2077093438 date "2007-08-29" @default.
- W2077093438 modified "2023-09-25" @default.
- W2077093438 title "Inhibition of Gastric H<sup>+</sup>,K<sup>+</sup>-ATPase and<i>Helicobacter pylori</i>Growth by Phenolic Antioxidants of<i>Curcuma amada</i>" @default.
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- W2077093438 doi "https://doi.org/10.1021/jf070719r" @default.
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