ABSTRACT
Free radical scavenging activity was observed in both the methanol extract (M.E) and aqueous extract (A.E) of Scoparia dulcis respectively. In this study significant free radical scavenging activity was determined by evaluating the inhibition concentration (IC50) in each test. In 2, 2-diphenyl-1-picrylhydrazyl (DPPH) model the extract displayed potential free radicals scavenging activity with IC50 of M.E is 311.13µg/mL and A.E is 441.96μg/mL. Nitric oxide model displayed IC50 of 293.77µg/mL in M.E and 434.93µg/mL in A.E. While superoxide ion model showed IC50 of 281.02 µg/mL and 440.14µg/mL respectively for both methanol and aqueous extract when compared to standard ascorbic acid. The presence of phenol, flavonoid and total antioxidant in both the extract justifies the antioxidant potential of the plant which brings about its free radicals scavenging potential. GC-MS analysis showed the presence of 6 different phytochemicals with (Z)-7-Hexadecenyl acetate found to be the compound with maximum peak percentage 51.51% in M.E and β-Cyclocitral with 43.90% in A.E respectively. Thus we conclude that the antioxidant activities may be due to the cumulative effect of the phytochemicals present in the plant which genuinely designate them as free radical scavenger.
ABSTRACT
The objective of the study is to evaluate the DNA damage, behavior and free radical scavenging enzymes level when exposed to noise. Noise stress was performed using broadband white noise generator after pre-treated oral administration of Indigofera tinctoria (300mg/Kg .b.w.). Significance increase in nitric oxide and lipid peroxidation level in stressed rat shows possibility of neurodegeneration and this is justified by genomic DNA damage in brain discrete region. Increase in enzymatic and decrease in non-enzymatic level suggest that oxidative imbalance persist in animal when expose to noise in both brain and adrenal. Anxiety and altered motor coordination was also observed in our studies, this finding could be attributed to the detrimental effects of noise not only at the biochemical level but also the molecular and psychological behavior of the rat. However, oral administration of I.tinctoria significantly prevented noise induced oxidative damages. These results conclude that I.tinctoria may possess neuroprotective effects and the antioxidant property of the plant may have resulted in its therapeutic efficacy.