Inhibition of gastric H(+),K(+)-ATPase and Helicobacter pylori growth by phenolic antioxidants of Curcuma amada.

Siddaraju, M. N. and Dharmesh, Shylaja M (2007) Inhibition of gastric H(+),K(+)-ATPase and Helicobacter pylori growth by phenolic antioxidants of Curcuma amada. Journal of agricultural and food chemistry, 55 (18). pp. 7377-86. ISSN 0021-8561

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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 microg/mL, respectively, exhibiting 9-27-fold better potency over lansoprazole (IC(50) of 19.3 +/- 2.2 microg/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 (IC(50) of 2.2 +/- 0.17 and 4.2 +/- 0.36 microg/mL), reducing power abilities (193-104 units/g), inhibition of lipid peroxidation (IC(50) of 10.3 +/- 0.91 and 15.6 +/- 1.6 microg/mL), and DNA protection (80% at 4 microg), indicating strong antioxidative properties. MGFP and MGBP thus may be potential and inexpensive multistep blockers against ulcers.

Item Type:	Article
Uncontrolled Keywords:	Antioxidant activity; free and bound phenolics; H+,K+-ATPase; Helicobacter pylori; Curcuma amada
Subjects:	600 Technology > 08 Food technology > 30 Spices/Condiments 600 Technology > 08 Food technology > 32 Antioxidants
Divisions:	Dept. of Biochemistry
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	07 Aug 2008 11:18
Last Modified:	22 Oct 2018 06:08
URI:	http://ir.cftri.res.in/id/eprint/1841

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