Pyrrolizidine alkaloids (PAs) are alkaloids which typically contain a necine (7-hydroxy-1-hydroxymethyl-6,7-dihydro-5H-pyrrolizidine) base unit, and they can be found in one third of the higher plants around the world. They are hepatotoxic, mutagenic and carcinogenic and pose a threat to human
Journal of medicinal chemistry, 31(8), 1520-1526 (1988-08-01)
The C-9 and C-7 monoesters and C-7, C-9 diesters of heliotridine with (S)-(+) and (R)-(-)-2-hydroxy-2-phenylbutyric acid were prepared, converted into their N-oxides, and compared with the corresponding C-9 monoesters of retronecine in the in vivo P388 lymphocytic leukemia screen. Relative
A livestock poisoning outbreak near Kingman, Arizona, USA, potentially linked to dehydropyrrolizidine alkaloids, prompted an evaluation of some local plants for the presence of these hepatotoxic alkaloids. To qualitatively and quantitatively examine two species of Cryptantha, a Boraginaceous genus previously
Chemical research in toxicology, 14(1), 91-100 (2001-02-15)
Pyrrolizidine alkaloids are naturally occurring genotoxic chemicals produced by a large number of plants. Metabolism of pyrrolizidine alkaloids in vivo and in vitro generates dehydroretronecine (DHR) as a common reactive metabolite. In this study, we report the development of a
Yao xue xue bao = Acta pharmaceutica Sinica, 39(10), 831-835 (2005-02-11)
To detect the hepatotoxic pyrrolizidine alkaloids (HPA) in the genus Ligularia Cass.. The alkaloid extracts of Ligularia plant materials were detected and analyzed by the method of combination of TLC, and LC/MSn. Among 22 species of Ligularia Cass., HPA were