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Antioxidant activity and phytochemical screening of the methanol extracts of Euphorbia hirta L.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Basma, Abu Arra Zakaria, Zuraini Latha, Lacimanan Yoga Sasidharan, Sreenivasan
Description	Country affiliation: Malaysia Author Affiliation: Basma AA ( Biology Division, School of Distance Education, Universiti Sains Malaysia, USM 11800, Pulau Pinang, Malaysia.)
Abstract	OBJECTIVE: To assess antioxidant activities of different parts of Euphorbia hirta (E. hirta), and to search for new sources of safe and inexpensive antioxidants. METHODS: Samples of leaves, stems, flowers and roots from E. hirta were tested for total phenolic content, and flavonoids content and in vitro antioxidant activity by diphenyl-1-picrylhydrazyl (DPPH) assay and reducing power was measured using cyanoferrate method. RESULTS: The leaves extract exhibited a maximum DPPH scavenging activity of (72.96±0.78)% followed by the flowers, roots and stems whose scavenging activities were (52.45±0.66)%, (48.59±0.97)%, and (44.42±0.94)%, respectively. The standard butylated hydroxytoluene (BHT) was (75.13±0.75)%. The IC(50) for leaves, flowers, roots, stems and BHT were 0.803, 0.972, 0.989, 1.358 and 0.794 mg/mL, respectively. The reducing power of the leaves extract was comparable with that of ascorbic acid and found to be dose dependent. Leaves extract had the highest total phenolic content [(206.17±1.95) mg GAE/g], followed by flowers, roots and stems extracts which were (117.08±3.10) mg GAE/g, (83.15±1.19) mg GAE/g, and (65.70±1.72) mg GAE/g, respectively. On the other hand, total flavonoids content also from leave had the highest value [(37.970±0.003) mg CEQ/g], followed by flowers, roots and stems extracts which were (35.200±0.002) mg CEQ/g, (24.350±0.006) mg CEQ/g, and (24.120±0.004) mg CEQ/g, respectively. HPTLC bioautography analysis of phenolic and antioxidant substance revealed phenolic compounds. Phytochemical screening of E. hirta leaf extract revealed the presence of reducing sugars, terpenoids, alkaloids, steroids, tannins, flavanoids and phenolic compounds. CONCLUSIONS: These results suggeste that E. hirta have strong antioxidant potential. Further study is necessary for isolation and characterization of the active antioxidant agents, which can be used to treat various oxidative stress-related diseases.
File Format	HTM / HTML
ISSN	19957645
e-ISSN	23524146
Journal	Asian Pacific Journal of Tropical Medicine
Issue Number	5
Volume Number	4
Language	English
Publisher	Elsevier
Publisher Date	2011-05-01
Publisher Place	China
Access Restriction	Open
Subject Keyword	Discipline Tropical Medicine Antioxidants Pharmacology Euphorbia Chemistry Plant Extracts Biphenyl Compounds Metabolism Dose-response Relationship, Drug Flavonoids Phenols Picrates Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Medicine

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