Abstract
Aims: The antioxidant and phytochemical properties of leaf extracts of the Nigerian Oxytenanthera abyssinica were evaluated at different concentrations using ascorbic acid standard. This preliminary study investigates the potentially bioactive components of the plant which may renew research into its medicinal value. Study Design: Cold extraction of the leaf parts followed by evaluation of phytochemicals and antioxidant capacity using chromatographic and spectrophotometric methods. Place and Duration of Study: Department of Biochemistry, College of Natural and Applied Sciences, Michael Okpara University of Agriculture P.M.B.7267 Umudike Abia State, Nigeria. Research Article Article European Journal of Medicinal Plants, 3(2): 206-217, 2013 207 Methodology: The antioxidant properties were determined using three assay models: the 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) colorimetric test and a modified version of in vitro antioxidant TBARS after cold extraction maceration. The activity was determined at different concentrations (10μg/ml,50μg/ml,100μg/ml,200μg/ml and 400μg/ml) of the extract and expressed as % inhibition. phytochemicals were determined by standard detection and spectrophotometric methods. Results: The yield of the methanolic leaf extract of Oxytenanthera abyssinica was 3.92% w/w dry matter. Steroids (steroid glycoside), alkaloids, saponins, tannins, cardiac glycosides, flavonoids, phlobatanins, anthroquinone and terpenes were detected while cyanogenic glycosides were absent. The quantitative analysis yielded (in mg/100g): flavonoids (1.51±0.23), alkaloids (1.40±0.02), polyphenols (1.31±0.32), tannins (0.071±0.40) and saponins (1.2±0.10). Oxytenanthera abyssinica’s DPPH reduction was highest at 400μg/ml (82.10 ± 0.01%) with IC50 of 56.2μg/ml. The ferric reducing power of the extract at 400μg/ml was 61±1.52% (FRAP: 0.61) and the inhibition of lipid peroxidation measured as TBARS was 81.0 ±1.11%. Conclusion: There is an indication that Oxytenanthera abyssinica contains important phytochemicals and an antioxidant capacity comparable with standard antioxidant compounds that may be linked to its beneficial effects on health.
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Claims 13
Claim · model-written summary
Methanolic leaf extract yield was 3.92% of dry matter.
- Taxon
- Oxytenanthera abyssinica
_1.jpg?width=60)
Oxytenanthera abyssinicae0 - Organ / stage
- leafe0
- Outcome
- yield of the methanolic leaf extracte0
- Value
- 3.92% w/w dry mattere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_1.jpg?width=500)
Verbatim
e0“The yield of the methanolic leaf extract of Oxytenanthera abyssinica was 3.92% w/w dry matter”
Claim · model-written summary
The extract contained nine named phytochemical classes.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- Steroids (steroid glycoside), alkaloids, saponins, tannins, cardiac glycosides, flavonoids, phlobatanins, anthroquinone and terpenes were detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Steroids (steroid glycoside), alkaloids, saponins, tannins, cardiac glycosides, flavonoids, phlobatanins, anthroquinone and terpenes were detected”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
Cyanogenic glycosides were absent.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- cyanogenic glycosides were absente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cyanogenic glycosides were absent”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
Flavonoid content was 1.51±0.23 mg/100g.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- flavonoidse0
- Value
- 1.51±0.23e0
- Qualifier
- mg/100ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The quantitative analysis yielded (in mg/100g): flavonoids (1.51±0.23)”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
Alkaloid content was 1.40±0.02 mg/100g.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- alkaloidse0
- Value
- 1.40±0.02e0
- Qualifier
- mg/100ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The quantitative analysis yielded (in mg/100g): flavonoids (1.51±0.23), alkaloids (1.40±0.02)”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
Polyphenol content was 1.31±0.32 mg/100g.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- polyphenolse0
- Value
- 1.31±0.32e0
- Qualifier
- mg/100ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The quantitative analysis yielded (in mg/100g): flavonoids (1.51±0.23), alkaloids (1.40±0.02), polyphenols (1.31±0.32)”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
Tannin content was 0.071±0.40 mg/100g.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- tanninse0
- Value
- 0.071±0.40e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tannins (0.071±0.40)”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
Saponin content was 1.2±0.10 mg/100g.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- saponinse0
- Value
- 1.2±0.10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saponins (1.2±0.10)”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
DPPH reduction peaked at 400μg/ml with 82.10 ± 0.01%.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicae0
- Outcome
- DPPH reductione0
- Direction
- higheste0
- Value
- 82.10 ± 0.01%e0
- Qualifier
- 400μg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oxytenanthera abyssinica’s DPPH reduction was highest at 400μg/ml (82.10 ± 0.01%) with IC50 of 56.2μg/ml”
Claim · model-written summary
The DPPH IC50 was 56.2μg/ml.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- IC50e0
- Value
- 56.2μg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with IC50 of 56.2μg/ml”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
Ferric reducing power was 61±1.52% at 400μg/ml.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- ferric reducing powere0
- Value
- 61±1.52%e0
- Qualifier
- 400μg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ferric reducing power of the extract at 400μg/ml was 61±1.52% (FRAP: 0.61)”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
FRAP was 0.61.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- FRAPe0
- Value
- 0.61e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“(FRAP: 0.61)”
t0“Oxytenanthera abyssinica”
Claim · model-written summary
TBARS inhibition of lipid peroxidation was 81.0 ±1.11%.
- Taxon
- Oxytenanthera abyssinicaOxytenanthera abyssinicat0
- Outcome
- inhibition of lipid peroxidation measured as TBARSe0
- Value
- 81.0 ±1.11%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibition of lipid peroxidation measured as TBARS was 81.0 ±1.11%”
t0“Oxytenanthera abyssinica”