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Herbal remedies have shown great promise for improving human health. The plant Crotalaria quinquefolia is used in folk medicine to cure different diseases, including scabies, fever, discomfort, and lung infections. The present research was designed to explore bioactive compounds and evaluate the neuropharmacological effects of C. quinquefolia extract through in vivo and in silico approaches. Different secondary metabolites as well as the antioxidant activity were measured. Furthermore, chemical compounds were identified by HPLC and GCMS analysis. The neuropharmacological activity was examined by hole cross, hole board, open field, Y-maze, elevated plus maze, and thiopental sodium induced sleeping time tests in mice at doses of 100 mg/kg and 200 mg/kg b.w. (p.o). Besides, an in-silico study was performed on proteins related to Alzheimer disease. The extract showed a significant content of secondary metabolites and antioxidant potential. The in-silico analysis showed that myricetin, quercetin, rutin, and kaempferol have good binding affinity with studied proteins, and QSAR studies revealed potential benefits for treating dementia, and age-related macular degeneration. The findings of the present neurological activity collectively imply that the extract has strong CNS depressant and anxiolytic activity. Therefore, C. quinquefolia can be a potential source of compounds to treat Alzheimer disease.
Zilani et al. (Mon,) studied this question.