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Insect biochemistry and molecular biology, 31(11), 1041-1056 (2001-08-25)
Platyphora boucardi leaf-beetles sequester tertiary pyrrolizidine alkaloids of the lycopsamine type acquired from their host-plant Prestonia portobellensis (Apocynaceae) and synthesize their own alkaloids from exogenous retronecine and aliphatic 2-hydroxy acids. Tracer studies with [14C]rinderine and its N-oxide revealed that P.
Archives of insect biochemistry and physiology, 66(4), 183-189 (2007-11-15)
Pyrrolizidine alkaloids (PAs) play a fundamental role in the sexual biology of the salt marsh moth Estigmene acrea. They are precursors for the male courtship pheromone hydroxydanaidal and they stimulate the growth and development of male pheromone-disseminating organs called coremata.
Toxicology and industrial health, 24(3), 181-188 (2008-10-10)
We have previously reported that metabolism of a series of pyrrolizidine alkaloids in vitro and in vivo generated a set of (+/-)6,7-dihydro-7-hydroxy-1-hydroxymethyl-5H-pyrrolizine (DHP)-derived DNA adducts. It has also been shown that the levels of the DHP-derived DNA adduct formation correlated
Toxicology and applied pharmacology, 182(2), 98-104 (2002-07-26)
Riddelliine is a representative pyrrolizidine alkaloid, a class of naturally occurring toxic phytochemicals present in plant species worldwide. Human exposure to pyrrolizidine alkaloids occurs through consumption of herbal dietary supplements, including comfrey, and through contaminated livestock products (e.g., milk). A
We have previously found evidence of intramolecular lactonization in rat liver microsomal metabolism of isoline, a 12-O-acetylated pyrrolizidine alkaloid. In this study, the metabolism of another 12-O-acetylated pyrrolizidine alkaloid, acetylduciformine, by the proposed transformation pathway was investigated under the same
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