A comprehensivein silicoexploration of pharmacological properties, bioactivities and COX-2 inhibitory potential of eleutheroside B fromEleutherococcus senticosus(Rupr. & Maxim.) Maxim.

Eleutherococcus senticosus(Rupr. & Maxim.) Maxim., popularly known as 'Siberian ginseng', is an important medicinal plant. Pharmacologically active compounds of this plant are called eleutherosides and among them, eleutheroside B is the most prevalent. TheE. senticosushas been reported to have many medicinal properties however; very few studies are reported to understand the medicinal properties of eleutheroside B. Consequently, in the present study various computational tools have been used to predict the drug-likeness, bioactivities, and pharmacokinetic properties of eleutheroside B. Besides, the inhibitory potential of eleutheroside B has been investigated against cyclooxygenase 2 (COX-2) enzyme. This study suggests that eleutheroside B is a drug-like compound with bioactivity score (-0.08 to 0.38), having satisfactory pharmacokinetic values. Metabolism and toxicities were further studied using FAME3, GLORY, pred-hERG and Endocrine Disruptome tools. No severe toxicities (Ames, hepatotoxicity, cardiotoxicity, skin sensitization) were predicted. Rat acute toxicity, ecotoxicity and cell line cytotoxicity were evaluated based on GUSAR and CLC-pred. The compound has been predicted as non-toxic (class 5), non-hERG inhibitor and less likely to cause adverse drug interactions. Molecular docking against COX-2 enzyme revealed strong hydrogen bonds (SER530, TYR355, LEU352, SER353, VAL349, TYR385, MET522) and hydrophobic interaction (LEU352) with eleutheroside B. The docking score (-6.97 kcal/mol) suggested that this molecule can be utilized as an anti-inflammatory agent as well as a potential anticancer drug in the future. Hence, this is a comprehensive integratedin silicoapproach to establish the anti-inflammatory mechanism of eleutheroside B in the background of its potential in future drug development. Communicated by Ramaswamy H. Sarma