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环境病理学,毒理学和肿瘤学期刊
影响因子: 1.241 5年影响因子: 1.349 SJR: 0.356 SNIP: 0.613 CiteScore™: 1.61

ISSN 打印: 0731-8898
ISSN 在线: 2162-6537

环境病理学,毒理学和肿瘤学期刊

DOI: 10.1615/JEnvPathToxOncol.v23.i3.60
10 pages

Sulfur Free Radical Reactivity with Curcumin as Reference for Evaluating Antioxidant Properties of Medicinal Zingiberales

Pukhrambam Chirangini
Department of Life Sciences, Manipur University, Imphal, India
Gurumayum J. Sharma
Department of Life Sciences, Manipur University, Imphal, India
Swapan K. Sinha
Tata Energy Research Institute, NE Regional Centre, Guwahati, India

ABSTRACT

Rhizome extracts of some members of the medicinal Zingiberales are widely used in dietary intake as well as in the traditional system of medicine. Curcumin, the chrome orange-yellow coloring compound present in turmeric rhizomes, has long been known to possess antioxidant property. Crude methanol extracts of the rhizomes of 11 species—Alpinia allughas,A. galanga, Curcuma amada, C. caesia, C. leucorrhiza, Hedychium coronarium, H. coccineum, H. flavescens, Kaempferia galanga, Zingiber cassumunar, and Z. officinale—were evaluated for their antioxidant properties using sulfur free radical reactivity with curcumin as a reference indicator. Sulfur free radicals (GS.) are generated by irradiating 15 mM glutathione (GSH) solution using a 5100 Ci cobalt-60 gamma irradiator. As reference indicator for the reactivity with sulfur free radicals, we used the depletion of pure curcumin sample in vitro as determined by a simple spectrophotometric method. The addition of the supernatant from crude rhizome extracts to the reaction mixture significantly decreased the depletion of curcumin, indicating that these crude extracts possessed antioxidant properties. The relative curcumin protection by different crude extracts against GS. showed that Z. cassumunar gave the highest degree of radioprotection. Our results reveal the potential medicinal use of rhizomes of medicinal Zingiberales as dietary agents.


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