ABSTRACT
Plant derived phytochemicals consisting of phenols and flavonoids possess antioxidant properties, eventually renders a lucrative tool to scavenge reactive oxygen species (ROS). Current study evaluates the preliminary phytochemical screening and antioxidant activity of methanolic extract of bark and leaf of Stereospermum chelonoides. Thus, various in vitro assay strategies were implemented to evaluate antioxidant potential of Stereospermum chelonoides, using DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging assay, ferric reducing antioxidant power (FRAP), total antioxidant capacity, determination of total phenol and flavonoid contents. Preliminary phytochemical study revealed the presence of alkaloid, carbohydrate, glycoside, flavonoid, steroid and tannin. In DPPH radical scavenging assay, the fraction showed significant antioxidant activities in the assay compared to the reference ascorbic acid in a dose dependent manner. The IC50 value of the crude methanol extract of bark and leaf was 53.99±3.25 μg/mL and 84.73±4.02 μg/mL, respectively, whereas IC50 value for the reference ascorbic acid was 14.56±0.24 μg/mL. Moreover, profound total antioxidant activity was observed for bark (309.88±1.03 mg/g equivalent to ascorbic acid) as well as leaf (147.09±1.79 mg/g equivalent to ascorbic acid) at 200 μg/mL extract concentration. Furthermore, extract showed good reducing power capability in both bark and leaf fraction. Total phenol content for the bark was 574.82 mg/g equivalent to gallic acid and for leaf was 189.86 mg/g. For bark, the total flavonoid content was found 55.82 mg/g equivalent to quercetin and for leaf it was 49.44 mg/g.
ABSTRACT
Plant derived phytochemicals consisting of phenols and flavonoids possess antioxidant properties, eventually renders a lucrative tool to scavenge reactive oxygen species (ROS). In the current study various in vitro assay strategies were implemented to evaluate antioxidant and cytotoxic potential of pet ether extract of seeds of Artocarpus chama Buch., using DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging assay, cupric reducing antioxidant capacity, reducing power antioxidant capacity, total antioxidant capacity, determination of total phenol and flavonoid contents and cytotoxic activity test using brine shrimp lethality bioassay. Preliminary phytochemical study revealed the presence of flavonoid and alkaloid in the extract. In DPPH radical scavenging assay, the fraction showed significant antioxidant activities in the assay compared to the reference ascorbic acid in a dose dependent manner.The IC50 value of the crude pet ether extract was 36.87 μg/mL, whereas IC50 value for the reference ascorbic acid was 14.56 μg/mL. Moreover, profound total antioxidant activity (3676.4 mg/g equivalent to ascorbic acid) was observed at 200 μg/mL extract concentration. Furthermore, extract showed good cupric reducing power and reducing power capability. In addition, significant amount of phenols and flavonoids content were obtained from the extract. The extract also displayed strong cytotoxic potential with LC50 value of 7.19 μg/mL in brine shrimp lethality bioassay. Based on these findings, it can be concluded that significant antioxidant potential as well as cytotoxic potential of pet ether extract, might be due to the attributes of high amount of phenols and flavonoids present in the extract.
ABSTRACT
Phytochemicals possessing phenols and flavonoids are potential sources of antioxidants, which are useful to scavenge reactive oxygen species (ROS). The present study was undertaken to evaluate and compare the antioxidant potential of pet ether and methanol extracts of fruits of Artocarpus chama Buch., using DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging assay, cupric reducing antioxidant capacity, reducing power antioxidant capacity, determination of total phenol and flavonoid contents. Preliminary phytochemical study revealed the presence of alkaloid and flavonoid in both extracts. The fraction showed significant antioxidant activities in the assay compared to the reference ascorbic acid in a dose dependent manner. In DPPH radical scavenging assay, the IC50 value of the crude pet ether and methanol extract was 27.64 μg/mL and 39.08 μg/mL, respectively, whereas IC50 value for the reference ascorbic acid was 12.70 μg/mL. Furthermore, both extracts showed similar cupric reducing power and reducing power capability. In addition, pet ether extract contains higher amount of phenols as compared with methanol extract, and possess similar flavonoid content expressed as Gallic acid and Quercetin, respectively. Based on these findings, it can be concluded that pet ether extract of the fruits of A. chama Buch possesses significant antioxidant potential comparing with methanol extract, which may be attributed to the high amount of phenols and flavonoids present in the extract.