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Antioxidant potentials and anticholinesterase activities of methanolic and aqueous extracts of three endemic Centaurea L. species
Scopus
Toplam 223 atıf DOI
The methanol and aqueous extracts of three endemic Centaurea species (C. polypodiifolia var pseudobehen, C. pyrrhoblephara and C. antalyense) were investigated for their antioxidant and cholinesterase inhibitory activities. The antioxidant activities of these extracts were evaluated by in vitro models including, phosphomolybdenum assay, free radical scavenging assays (DPPH and ABTS), β-carotene/linoleic acid test system, metal chelating assay, FRAP assay, ferric and cupric reducing power. Cholinesterase inhibitory activities were examined using Ellman's colorimetric method. Total phenol, flavonoid, and saponin contents were also measured. Among the six Centaurea extracts evaluated, the highest antioxidant abilities were obtained from C. polypodiifolia var pseudobehen. Methanolic extracts from C. polypodiifolia var pseudobehen and C. antalyense had a noticeable inhibition towards AChE and BChE. These findings suggest that Centaurea species could be an anticholinesterase agent and antioxidant resource in some industries, such as food, pharmacology, and cosmetics. © 2013 Elsevier Ltd.
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Phenolic compounds, antioxidant properties and enzyme inhibition ability of adiantum capillus veneris L. Linked to Alzheimer’s disease, diabetes mellitus and skin disorders
Scopus
Havuzumuzda 17 atıf almış
Adiantum capillus-veneris L. is one of the best ferns that are used in traditional medicine for breaking kidney stones. This study aimed to evaluate antioxidant activity of the different extracts of A. capillus-veneris using the phosphomolybdenum assay, free radical scavenging activity (DPPH), ferric reducing antioxidant power (FRAP), and cupric ion reducing power activity test (CUPRAC). Besides, the enzyme inhibition activities were determined against acetylcholinesterase, tyrosinase, α-glucosidase and α-amylase. Total and individual phenolic compounds were also determined by spectrophotometric and HPLC methods, respectively. Total phenolic and flavonoid contents were found to change between 354-441 mg GAE/g and 23-123 mg QE/g, respectively. The major phenolic compounds were benzoic acid, epicatechin, syringic acid and catechin. Methanol andethyl acetate extracts exhibited stronger antioxidant abilities compared to water extract. A. capillus-veneris extracts showed high enzyme inhibition activities except for butrylcholinesterase. The results indicated that the different extracts of A. capillus-veneris L. can be used as natural sources of antioxidants and enzyme inhibitors.
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Kurumlar (2)
Aksaray Üniversitesi
Aksaray, Turkey
Selçuk Üniversitesi
Selçuklu, Turkey