95% and as 47 ± 1.21% by the standard. During the oxidation process, peroxides were gradually decomposed to lower molecular weight compounds, like malonaldehyde, which could be measured by TBA method on the final day of the incubation period. The antioxidant activity of the nanoparticles was high on 7th day of incubation which was compared with the standard and was shown in Fig. 7. While the standard inhibited lipid peroxidation to 49 ± 1.31%, ABT199 the sample inhibited to 46 ± 1.71%. Absorbance was measured for various dilutions from 1:1 to 1:256 with concentration

of the sample ranging from 1000 μg/ml to 1.953 μg/ml and the corresponding percentage of cell viability was calculated. The cell viability of Human Epithelium cells of Liver cancer was found to be 16.39% at 1 mg/ml concentration of the sample with GI50 (50% Growth inhibition) Selleckchem SKI606 at 93.75 μg/ml as shown in the Fig. 8. The cytotoxic effects of the nano samples were depicted in Fig. 9. Scientists are focusing on medicinal plants to discover

natural antioxidants since some synthetic antioxidants have toxic effects. In addition, natural antioxidants play a vital role in protecting human health.23 Many reports have been published about the biogenesis of silver nanoparticles using several plant extracts but their antioxidant and anticancer activities have not yet been revealed. This study is the first report on the antioxidant and anticancer potential of silver nanoparticles synthesized from the leaf extract of M. pubescens. The activities of antioxidants have until been attributed to various mechanisms such as prevention of chain initiation, decomposition of peroxides, reducing capacity and radical scavenging.24 The silver nanoparticles studied exhibited significant radical scavenging activities. The effect of antioxidants on DPPH is thought to be due to their hydrogen donating activity.25 DPPH is considered as a lipophilic radical which makes it to readily accept electron from the antioxidant compound, converting its

color from purple to yellow which is detected at 517 nm. Superoxide anion radical is a weak oxidant but it gives rise to the generation of powerful and dangerous hydroxyl radicals as well as singlet oxygen, both free radicals contribute to oxidative stress.26 Hydroxyl radical is one of the potent reactive oxygen species in the biological system. It reacts with polyunsaturated fatty acid moieties of cell membrane phospholipids and causes damage to cell.2 In the metal chelating activity, Ferrozine can quantitatively chelate with Fe2+ and forms a complex with red color. This reaction is limited in the presence of other chelating agents and results in the decrease of red color of the ferrozine-Fe2+ complex. Measurement of the color reduction estimates the chelating activity of the sample to compete with ferrozine for the ferrous ions.27 Phosphomolybdenum reduction potential of M.