The antioxidant activity of the essential oils of Artemisia afra, Artemisia abyssinica and Juniperus procera

Burits, M.; Asres, Kaleab; Bučar, Franz

doi:10.1002/ptr.691

Cited by 182 publications

(118 citation statements)

References 15 publications

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“…The sample concentration (mg/mL) that required scavenging 50% of DPPH (IC 50 ) was calculated from the graph plotting inhibition percentage against the extract concentration (Burits et al, 2001).…”

Section: Evaluation Of Antioxidant Properties Of the Extractmentioning

confidence: 99%

Antidiabetic, antioxidant, and antilipid peroxidative activities ofDracocephalum polychaetumshoot extract in streptozotocin-induced diabetic rats:In vivoandin vitrostudies

Pouraboli

Nazari

Sabet

et al. 2015

Pharmaceutical Biology

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Context: Dracocephalum polychaetum Bornm. (Lamiaceae) is used in folk medicine and contains antioxidant agents. Objectives: The objective of this study is to investigate the antidiabetic, antioxidant, and antilipid peroxidative properties of methanol extract of D. polychaetum aerial parts. Materials and methods: The effect of extract (200, 300, and 400 mg/kg, b.w.) on oral glucose tolerance test (OGTT) was investigated. Also, extract (300 mg/kg) administered orally in diabetic rats for 14 d then, serum levels of some biochemical factors were evaluated. Pancreas samples were used for the determination of malondealdehyde (MDA) level, glutathione (GSH) content, superoxide dismutase, and catalase enzyme activities. Red blood cells (RBCs) and plasma were used for MDA estimation. Pancreatic a-amylase inhibition, DPPH (1,1-diphenyl-2-picrylhydrazyl), and FRAP (ferric reducing antioxidant power) assays were done. The total flavonoid content of the extract was determined by spectrophotometry. Results: Extract (300 mg/kg) decreased serum glucose level (27.1%) significantly at 120 min in OGTT. Serum levels of creatinine, triglycerides, cholesterol, alanine amino transferase and MDA levels in plasma, RBCs, and pancreas significantly decreased in treated (300 mg/kg) diabetic rats, while pancreatic GSH content, superoxide dismutase, and catalase enzymatic activities increased (p50.05). The IC 50 values for the extract and butyl hydroxyanisole were 5.6 and 1.15 mg/mL in DPPH and 0.155 and 0.062 mg/mL in the FRAP methods, respectively. The extract had no inhibitory effect on a-amylase activity. The total amount of flavonoids of the extract was estimated to be 1.8% (g/g) on the basis of quercetin content. Conclusion: Dracocephalum polychaetum shoot extract has antioxidant, antihyperlipidemic, and antilipid peroxidative properties.

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Section: Evaluation Of Antioxidant Properties Of the Extractmentioning

confidence: 99%

Antidiabetic, antioxidant, and antilipid peroxidative activities ofDracocephalum polychaetumshoot extract in streptozotocin-induced diabetic rats:In vivoandin vitrostudies

Pouraboli

Nazari

Sabet

et al. 2015

Pharmaceutical Biology

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“…OH free radical scavenging activity of samples was measured with the procedure described by Burits et al (2001).…”

Section: Deoxyribose Degradation Assaymentioning

confidence: 99%

“…Finally, deoxyribose was omitted from the reaction mixture in order to see whether the compounds under examination themselves could form degradation products that react with TBA to make chromogen. By omission of deoxyribose from the reaction mixture, the tested oils were the only substrates to react with OH radicals and form TBA reactive species, TBARS (Burits et al, 2001). The volatile oil obtained from fruits and leaves of male and female J. oblonga, as well as standard compounds, limonene, a-pinene, and a-thujene, were the only substrates to react with OH radicals and to form TBARS.…”

Section: Assay For Site-specific Actionsmentioning

confidence: 99%

Antioxidant Activity of the Essential Oils of Different Parts ofJuniperus communis. subsp.hemisphaerica. andJuniperus oblonga.

Emami

Javadi

Hassanzadeh

2007

Pharmaceutical Biology

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The essential oils of different parts of Juniperus communis subsp. hemisphaerica (Presl) Nyman (Cupressaceae) and Juniperus oblonga M. B. were examined for their potential radical scavenging activity. The compositions of the essential oils of these plants were studied qualitatively and quantitatively by GC and GC-MS. The main components of the essential oils as well as positive controls were subjected to antioxidant testing. A rapid evaluation for antioxidants, using two TLC screening methods, showed that all tested oils and their main components have antioxidant activity. The abilities of the volatile oils to act as nonspecific donors for hydrogen atoms for electron were checked in the diphenylpicrylhydrazyl (DPPH) assay. In the DPPH assay, the strongest effect among the essential oils was measured for the oil of leaves of male J. communis subsp. hemisphaerica at a concentration of 4 mL=mL (24.0%) In the deoxyribose degradation assay, the essential oils, pure components, and positive controls were tested at different concentrations. Most of the tested compounds showed some antioxidant effects. The fruit oil of J. oblonga has the strongest effect among the tested volatile oils.The deoxyribose assay was modified in three different ways to assess whether the oils exhibited site-specific effects. The results of the current study, which demonstrate the DPPH scavenging activity of the essential oils of the of leaves of male J. communis subsp. hemisphaerica and the OH radical scavenging effects of the fruit oil of J. oblong suggest the use of these two essential oils in very low concentrations for preserving food materials.

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“…(Asteraceae) and Tulbaghia violacea Harv. (Liliaceae) were selected on the basis of previously reported antioxidant activity ([Allen et al, 1998], [Burits et al, 2001], [Kubec et al, 2002], [Zishiri, 2004], [Chikoto and Eloff, 2005], [Zheng and Wang, 2001] and [Velíšek et al, 2006]). According to Allen et al (1998) antioxidant compounds are known to reduce the severity of Eimeria tenella infections by ameliorating the degree of intestinal lipid peroxidation.…”

Section: Introductionmentioning

confidence: 99%

The value of plant extracts with antioxidant activity in attenuating coccidiosis in broiler chickens

Naidoo

McGaw

Bisschop

et al. 2008

Veterinary Parasitology

151

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Coccidiosis remains one of the most important diseases in the poultry industry and results in the annual loss of millions of US dollars by the poultry industry. In South Africa and other developing countries where a large percentage of the population is unemployed, cheap food production is necessary. If the control of the coccidian parasite could be made more economical, these savings could be passed on to the consumer. In Europe, where the economics are different, people are becoming more aware of the potential dangers of using antimicrobials in producing animal protein. A solution to both these problems could be the use of plant products that function by mechanisms other than those of chemotherapeutics, with the additional advantage of a natural origin. Antioxidant compounds could hold promise for the control of Eimeria infections due to the association of coccidial infection with lipid peroxidation of the intestinal mucosa. Four plant extracts with antioxidant activity were screened for their anticoccidial activity in vivo with toltrazuril as the positive control. Combretum woodii (160 mg/kg) proved to be extremely toxic to the birds, while treatment with Tulbaghia violacea (35 mg/kg), Vitis vinifera (75 mg/kg) and Artemisia afra (150 mg/kg) resulted in feed conversion ratios similar to toltrazuril, and higher than the untreated control. T. violacea also significantly decreased the oocyst production in the birds. From this study we conclude that antioxidant-rich plant extracts have potential benefits in treating coccidial infections. The promising results obtained with T. violacea justify further studies on the potential value of the plant as a therapeutic or prophylactic anticoccidial agent.

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The antioxidant activity of the essential oils of Artemisia afra, Artemisia abyssinica and Juniperus procera

Cited by 182 publications

References 15 publications

Antidiabetic, antioxidant, and antilipid peroxidative activities ofDracocephalum polychaetumshoot extract in streptozotocin-induced diabetic rats:In vivoandin vitrostudies

Antidiabetic, antioxidant, and antilipid peroxidative activities ofDracocephalum polychaetumshoot extract in streptozotocin-induced diabetic rats:In vivoandin vitrostudies

Antioxidant Activity of the Essential Oils of Different Parts ofJuniperus communis. subsp.hemisphaerica. andJuniperus oblonga.

The value of plant extracts with antioxidant activity in attenuating coccidiosis in broiler chickens

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