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© Fabrice Chrétien with Ultrapole, colorized by Jean-Marc Panaud
Cellule souche (en jaune) de muscle squelettique partiellement recouverte par la membrane basale, migrant sur une fibre musculaire (en bleu).
Publication : Journal of natural products

Kinetic study of the rearrangement of deuterium-labeled 4′-O-methylnorbelladine in Leucojum aestivum shoot cultures by mass spectrometry. Influence of precursor feeding on amaryllidaceae alkaloid accumulation

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of natural products - 20 Oct 2011

El Tahchy A, Ptak A, Boisbrun M, Barre E, Guillou C, Dupire F, Chrétien F, Henry M, Chapleur Y, Laurain-Mattar D

Link to Pubmed [PMID] – 22014155

J. Nat. Prod. 2011 Nov;74(11):2356-61

Alkaloids from plants of the family Amaryllidaceae have important pharmacological properties and can be regarded as derivatives of the common precursor 4′-O-methylnorbelladine (6) via intramolecular oxidative phenol coupling. Their biosynthetic pathway, particularly in Leucojum aestivum, has not yet been totally elucidated. Therefore, shoot cultures of this plant were subcultured in medium containing the labeled precursor 4′-O-methyl-d(3)-norbelladine (3) at various concentrations (0.05, 0.10, and 0.20 g/L) and were incubated for various periods of time (15, 30, and 40 days). The aim of this work was to study the influence of this precursor on both labeled and native alkaloid accumulation. Biotransformation into galanthamine (1) and lycorine (2) in shoot cultures was demonstrated using HPLC coupled to mass spectrometry. A maximal amount of 0.16% of 1 referred to the dry weight was obtained at day 15 in shoots fed with 0.10 g/L of precursor. In addition, a 20.5% dry weight of 2 was reached after 40 days of feeding with 0.20 g/L of precursor.

http://www.ncbi.nlm.nih.gov/pubmed/22014155