EXTRACTION, MOLECULAR DOCKING, HPTLC ESTIMATION AND IN VITRO EVALUATION OF UREASE INHIBITION POTENTIAL OF STEM BARK OF TERMINALIA ARJUNA

The extraction of stem bark of Terminalia arjuna using different extraction methods viz. room temperature extraction (RTE), soxhlet extraction (SE), Ultrasound assisted extraction (USAE) and microwave assisted extraction (MAE), estimation of the percentage yield of marker compounds arjunic acid and arjunolic acid present and in vitro evaluation of urease inhibitory activity of the extracts has been investigated. The quantitative estimation of the yield of marker compounds was done using HPTLC using standard plot technique. The molecular docking of the marker compounds was performed on urease 3LA4 enzyme protein. The in vitro urease inhibitory activity of the extracts was performed spectro photometrically taking thiourea as standard. The percentage yield of the marker compounds was in order MAE>USAE>SE>RTE. The molecular docking study suggested that the arjunic acid (-55.511 Kcal/mol) exhibited better results of inhibition compared with the free energy values of arjunolic acid (-40.765 Kcal/mol) and standard thiourea (-25.846 Kcal/mol).  The in vitro urease inhibitory activity of the extracts also followed same pattern as for the percentage yield of the marker compounds thereby suggesting that the urease inhibition has direct relation with the yield of the marker compounds in the given samples.