ptaquiloside

ptaquiloside

a norsesquiterpene glucoside of the illudane type; a major toxic principle of bracken (Pteridium aquilinum) and rock fern (Cheilanthes sieberi); is retinotoxic, radiomimetic, carcinogenic and responsible for thrombocytopenia leading to generalized hemorrhages in acute poisoning of cattle, bovine enzootic hematuria and bright blindness.
References in periodicals archive ?
Agnew MP, Lauren DR (1991) Determination of ptaquiloside in bracken fern (Pteridium esculentum).
Niwa H, Ojika M, Wakamatsu K, Yamada K, Hirono I, Matsushita K (1983) Ptaquiloside, a novel norsesquiterpene glucoside from bracken, Pteridium aquilinum var.
Key words: Bovine enzootic hematuria, Pteridium, upper alimentary syndrome, ptaquiloside, papillomavirus bovine type 2 and 4.
Factors which may affect ptaquiloside levels in milk: effects of altitude, bracken fern growth stage, and milk processing.
Kuhn) pterosins A and B and ptaquiloside in a bracken population of the tropical Andes.
Moreover, scientists believe ptaquiloside can leach from bracken into ground water at levels many thousand times the safe limit.
New research into Bracken, the common green fern which smothers Welsh hillsides, suggests it may be contaminating water supplies with cancer-causing agent ptaquiloside (PTQ).
Bracken fern contains a chemical, ptaquiloside, that is known to be carcinogenic to mammals in high doses.
Stereochemistry of ptaquiloside, a novel norsesquiterpene glucoside from bracken, Pteridium aquilinum var latiusculum.
Alonso-Amelot ME, Castillo U, Smith BL, Lauren DR (1996) Bracken ptaquiloside in milk.
Alonso-Amelot ME, Castillo U, Smith BL, Lauren DR (1998) Excretion through milk of ptaquiloside in bracken-fed cows: a quantitative assessment.
Hoy, aun cuando no se ha comprobado de manera fehaciente cual o cuales son los metabolitos responsables de su accion, se reconoce la estrecha relacion existente entre presencia del helecho y aparicion de la HEB [2, 5, 6, 13, 16, 29, 37, 39, 41, 42, 43, 44]; una fraccion de un glucosido illudano termoinestable, denominada ptaquiloside, ha sido implicada directamente con la etiologia de la HEB [1, 2, 3, 4, 13, 18, 39, 41, 44].