A potent acetylcholinesterase inhibitor from Pancratium illyricum L

Fitoterapia. 2014 Jan:92:163-7. doi: 10.1016/j.fitote.2013.11.005. Epub 2013 Nov 18.

Abstract

Plants belonging to the Amaryllidaceae contain an exclusive group of alkaloids, known as sources of important biological activities. In the present work, Pancratium illyricum L., a species belonging to this family and endemic of Sardinia (Italy), was investigated for its alkaloid content. Fresh bulbs and leaves were processed separately. Standard extraction and purification procedures were applied to obtain fractions and compounds for GC-MS and NMR analysis. In addition to eight already known alkaloids (1-8), 11α-hydroxy-O-methylleucotamine (9) was isolated for the first time and its structure completely determined by one and two-dimensional (1)H and (13)C NMR spectroscopy. This new galanthamine-type compound exhibited a pronounced in vitro acetylcholinesterase (AChE) inhibitory activity (IC50=3.5±1.1 μM) in comparison to the reference standard galanthamine hydrobromide (IC50=1.5±0.2 μM).

Keywords: 11α-hydroxy-O-methylleucotamine; Acetylcholinesterase inhibitory activity; Alkaloids; Pancratium illyricum L.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetylcholinesterase / metabolism*
  • Alkaloids / chemistry
  • Alkaloids / isolation & purification
  • Alkaloids / pharmacology*
  • Cholinesterase Inhibitors / chemistry
  • Cholinesterase Inhibitors / isolation & purification
  • Cholinesterase Inhibitors / pharmacology*
  • Inhibitory Concentration 50
  • Liliaceae / chemistry*
  • Molecular Structure
  • Plant Extracts / chemistry
  • Plant Extracts / pharmacology*
  • Plant Leaves
  • Plant Roots

Substances

  • 11-hydroxy-O-methylleucotamine
  • Alkaloids
  • Cholinesterase Inhibitors
  • Plant Extracts
  • Acetylcholinesterase