Sesamol (SES) and linalool (LIN) are aromatic compounds that have neuroprotective effects. The main purpose of this study is to evaluate the anxiolytic activity of LIN and SES co-treatment on Swiss albino mice and analyze its possible mechanism through in silico study. In this sense, the mice were given the gamma-aminobutyric acid type A receptors (GABAA) agonist diazepam (DZP; 3 mg/kg, p.o.) as a positive control. A vehicle (10 mL/kg) was served as control. The tested chemicals, single-dose LIN (50 mg/kg) and SES (50 mg/kg), as well as a combination (LIN + SES) and (DZP + LIN + SES), were administered orally in order to conduct several behavioral tests, including open-field, swings box, hole-crossing, and dark-resident time tests. Further, molecular docking studies of LIN, SES, and DZP were carried out through different software. The results showed that LIN and SES individually have significant anxiolytic-like activity in mice. Further, when LIN was combined with SES and with (SES + DZP), it exhibited a relatively lower locomotor activity in mice compared to individual treatment groups, indicating a synergistic action. In addition, the molecular docking analysis revealed that LIN and SES have a moderate binding affinity (-5.0 and -5.1 kcal/mol) toward the GABAA receptor α3 subunit. In conclusion, our findings suggest that LIN and SES exerted synergistic anxiolytic activity on Swiss albino mice, possibly through the GABAergic interaction pathways.
Keywords: GABAA receptor; anxiety; linalool; molecular docking; sesamol.
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