Inflammatory markers such as cyclooxygenase (COX)-2, inducible nitric oxide synthase (iNOS), myeloperoxidase (MPO), and prostaglandin (PEG) are widely known as major targets in discovering natural anti-inflammatory drugs for the treatment of inflammationrelated diseases. Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and aspirin are mostly used at present, however, some NSAIDS have been reported to cause gastrointestinal side effect due to ligand-protein interaction. Molecular docking is a promising tool to study such modes of interaction. In this study, we evaluated the potential use of anthocyanin and ternatin flavonoids as natural anti-inflammatory agents for treatment of inflammatory-related diseases using in silico molecular docking assay. Automated docking study using Protein-Ligand ANT System (PLANTS) and AutoDock Vina was performed with various ligand molecules, including ibuprofen, anthocyanin, and ternatin against the protein crystal structures of COX-1, COX-2, iNOS, and MPO. The in silico data demonstrated that ibuprofen bound effectively to the active site of COX-1 and MPO with minimum binding energy, yet the compound required more energy to bind the active site of COX-2. Ternatin flavonoid was bound to COX-2 and iNOS with minimum binding energy. In terms of binding energy, anthocyanin flavonoid was found to be effective for inhibiting COX-1, COX-2, and iNOS. These results suggested that anthocyanin and ternatin flavonoids may potentially be developed as anti-inflammatory drug candidate for the treatment of inflammatory-related diseases.
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