Chemical fingerprint by HPLC-DAD-ESI-MS, GC-MS analysis and anti-oxidant activity of Manasamitra Vatakam: A herbomineral formulation

Abstract

Background: Manasamitra Vatakam is a classical ayurvedic herbo mineral formulation used for the treatment of neurodegerative properties and epileptic disorders. The wide range mixture of herbal extracts and minerals were used in the formulation. Aim: The aim of the study implies in performing the chemo-profiling, chromatographic fingerprint analysis by HPLC-DAD-ESI-MS for the selected formulations of Manasamitra Vatakam followed by the identification of bioactive compounds by Gas Chromatography - Mass Spectrometric (GC-MS) analysis, to evaluate the diffusion and dilution methods for the determination of anti-bacterial activity in the methanolic extracts of Manasamitra Vatakam (MMV). Materials and Methods: The antibacterial activity was performed by both diffusion and dilution methods whereas the antioxidant activity was performed by free radical scavenging of 2,2-diphenyl-1-picrylhydrazy and hydrogen peroxide scavenging assay method. Results: The estimation of bioactive constituents showed positive results by qualitative analysis. Antibacterial activity of MMV was evaluated against two-gram positive Staphylococcus aureus and Bacillus cereus, two gram negative Escherichia coli and Klebsiella pneumonia by disk diffusion (0.078-10μg mL-1), broth dilution (0.078-10μg mL-1) and broth micro dilution method (0.39-50μg mL-1) respectively. The bioactive constituents were analysed by GC-MS analysis for the methanolic extract of the formulation. Conclusion: To conclude, the formulation was found abundant with phenolic and flavonoid compounds by HPLC-ESI-MS analysis, the bioactive compounds identified are responsible for the anti-bacterial activity. The broth microdilution method performed by resazurin method was observed as the fast screening, sensitive and accurate method for the quantitative determination of antibacterial activity.