Saha BP

References (2)

Title : Acetylcholinesterase enzyme inhibitory potential of standardized extract of Trigonella foenum graecum L and its constituents - Satheeshkumar_2010_Phytomedicine_17_292
Author(s) : Satheeshkumar N , Mukherjee PK , Bhadra S , Saha BP
Ref : Phytomedicine , 17 :292 , 2010
Abstract : Ethno pharmacological approach has provided several leads to identify potential new drugs from plant sources, including those for memory disorders. Acetylcholinesterase inhibitors (AChEI) give a symptomatic relief to some of the clinical manifestations of the disease. The main objective of this study is to standardize the extract of Trigonella foenum graecum L with trigonelline by HPTLC method and determine the in vitro AChE inhibitory activity of Trigonella foenum graecum L and its constituents using galanthamine as a reference. Different concentrations of hydro alcoholic extract of Trigonella foenum graecum and trigonelline were subjected to HPTLC analysis using the mobile phase n propanol, methanol and water (4:1:2, v/v). The R(f) of trigonelline was found to be 0.43, and the correlation coefficient of 0.99 was indicative of good linear dependence of peak area on concentration. The concentration of trigonelline was found to be 13mgg(-1)w/w in the hydro alcoholic extract of Trigonella foenum graecum. The AChE inhibitory activity of crude fenugreek seed extracts, fractions and trigonelline was evaluated using Ellman's method in 96-well micro plate's assay and TLC bioassay detection. The ethyl acetate fraction of the alcohol extract (IC50 53.00 +/- 17.33microg/ml), and total alkaloid fraction (IC50 9.23+/-6.08microg/ml) showed potential AChE inhibition. Trigonelline showed IC50 233+/-0.12microM. Galanthamine was used as standard and it showed inhibition of acetyl cholinesterase with an IC50 value of 1.27+/-0.21microM.
ESTHER : Satheeshkumar_2010_Phytomedicine_17_292
PubMedSearch : Satheeshkumar_2010_Phytomedicine_17_292
PubMedID: 19576740

Title : Acetylcholinesterase inhibitory potential of a carbazole alkaloid, mahanimbine, from Murraya koenigii - Kumar_2010_Phytother.Res_24_629
Author(s) : Kumar NS , Mukherjee PK , Bhadra S , Saha BP , Pal BC
Ref : Phytother Res , 24 :629 , 2010
Abstract : In the search for acetylcholinesterase (AChE) inhibitors from Indian medicinal plants, via bioassay-guided isolation, a carbazole alkaloid, mahanimbine [3, 5-dimethyl-3-(4- methylpent-3-enyl)-11H-pyrano [5, 6-a] carbazole], was isolated from the petroleum ether extract of the leaves of Murraya koenigii. Inhibition of AChE was evaluated based on Ellman's method using 96-well microplate readers. Mahanimbine inhibited AChE activity in a dose-dependent manner with an IC(50) value of 0.03 +/- 0.09 mg/mL, while galantamine was used as a standard. The AChE inhibitory activity of this carbazole alkaloid has not been reported so far, and this study is the first to reveal this activity in carbazole alkaloid mahanimbine, isolated from Murraya koenigii.
ESTHER : Kumar_2010_Phytother.Res_24_629
PubMedSearch : Kumar_2010_Phytother.Res_24_629
PubMedID: 19943242