Evaluation of Free Radical Scavenging Potential of Different Bioactive Fractions Present in Boerhavia diffusa Linn. Root Extract: An in-vitro Approach
Mohammad Khalid *
Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-kharj 11942, Saudi Arabia.
Mohammed H. Alqarni
Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-kharj 11942, Saudi Arabia.
Ahmed I. Foudah
Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-kharj 11942, Saudi Arabia.
Juber Akhtar
Department of Pharmaceutics, Faculty of Pharmacy, Integral University, Lucknow 226026, India.
Badruddeen .
Clinical Laboratory Department of Pharmacology, Faculty of Pharmacy, Integral University, Lucknow 226026, India.
Ambreen Shoaib
Department of Clinical Pharmacy, Faculty of Pharmacy, Jazan University, Jazan 45142, Saudi Arabia.
Prawez Alam
Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-kharj 11942, Saudi Arabia.
*Author to whom correspondence should be addressed.
Abstract
Aim and Objectives: Boerhavia diffusa (B. diffusa) frequently known as punarnava is specifically used to replenish the body. The present work was designed to evaluate the scavenging potential of its bioactive constituents.
Materials and Methods: The different fractions of B. diffusa root methanolic extract were examined for phenolic, flavonoids contents, DPPH free radical and Nitric oxide scavenging activities. Further antioxidant activity was evaluated by ABTS free radical scavenging method and also from the reducing potential scavenging activity. The total phenolic content in different fractions by using various solvent like ethanol, diethyl ether, chloroform, ethyl acetate, and n-butanol were carried out to find the antioxidant activities.
Results: The phenolic content was highest in ethanolic fraction that was significantly comparable with ascorbic acid. The flavonoid content was highest in ethanol fraction (41.93 ± 3.92 µg/mL) followed by n-butanol fraction (31.68 ± 1.72 µg/mL), then ethyl acetate fraction (29.67 ± 2.83 µg/mL) and least in chloroform fraction (16.91 ± 2.74 µg/mL). The ethanolic fraction of B. diffusa also showed highest DPPH radical scavenging activity (101.29 ± 3.78) when compared with other fractions of same extract using different solvent phases. Moreover the nitric oxide scavenging activity of ethanolic fraction was maximum (82.31 ± 2.83) than different fractions. The ethanolic fraction also showed improved ABTS radical scavenging activity (81.73 ± 2.73 mg/mL) while chloroform fraction showed poor ABTS radical cation scavenging activity (29.51 ± 2.79 mg/mL).
Conclusions: The study concludes that Boerhavia diffusa has rich and ample source of phenolic acid and flavonoids. Among all fractions the ethanolic has potent antioxidant activity, which shows its significance for a better novel approach.
Keywords: Antioxidant, B. diffusa root, 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity, phenolic, flavonoid content