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ptaquiloside/pteridium esculentum
Povezava se shrani v odložišče
Stran 1 iz 59 rezultatov
Variation in ptaquiloside content In bracken (Pteridium esculentum (Forst. f) Cockayne ) in New Zealand.
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Prijava / prijava
OBJECTIVE
To examine stands of bracken fern (Pteridium esculentum) from throughout New Zealand for the presence and concentration of ptaquiloside (Pta), and to compare the presence and/or concentrations of Pta in areas where bovine enzootic haematuria (BEH) and/or acute haemorrhagic syndrome (AHS)
Fast LC-MS quantification of ptesculentoside, caudatoside, ptaquiloside and corresponding pterosins in bracken ferns.
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Prijava / prijava
Ptaquiloside (PTA) is an illudane glycoside partly responsible for the carcinogenicity of bracken ferns (Pteridium sp.). The PTA analogues ptesculentoside (PTE) and caudatoside (CAU) have similar biochemical reactivity. However, both compounds are highly under-investigated due to the lack of
Fate of ptaquiloside-A bracken fern toxin-In cattle.
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Prijava / prijava
Ptaquiloside is a natural toxin present in bracken ferns (Pteridium sp.). Cattle ingesting bracken may develop bladder tumours and excrete genotoxins in meat and milk. However, the fate of ptaquiloside in cattle and the link between ptaquiloside and cattle carcinogenesis is unresolved. Here, we
Ptaquiloside, the major carcinogen of bracken fern, in the pooled raw milk of healthy sheep and goats: an underestimated, global concern of food safety.
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Prijava / prijava
Bracken fern (Pteridium aquilinum) is a worldwide plant containing toxic substances, which represent an important chemical hazard for animals, including humans. Ptaquiloside, 1, a norsesquiterpenoid glucoside, is the major carcinogen of bracken detected in the food chain, particularly in the milk
Ptaquiloside Z, a new toxic unstable sesquiterpene glucoside from the neotropical bracken fern Pteridium aquilinum var. caudatum.
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Prijava / prijava
Reversed-phase HPLC fractionation, monitored by brine shrimp bioassay, led to the isolation of a new illudane-type sesquiterpene glucoside, ptaquiloside Z (2), as well as the known bracken carcinogen ptaquiloside (1), from a bioactive aqueous extract of the neotropical bracken fern Pteridium
Carcinogenic effects of ptaquiloside in bracken fern and related compounds.
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Prijava / prijava
Consumption of the bracken fern Pteridium aquilinum by cattle has been shown to induce bladder and intestinal carcinomas in cattle and to cause a number of diseases in other farm animals. An unstable glucoside named ptaquiloside, containing a reactive cyclopropane ring, has been isolated from the
Concentration of ptaquiloside, a major carcinogen in bracken fern (Pteridium spp.), from eastern Australia and from a cultivated worldwide collection held in Sydney, Australia.
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Prijava / prijava
Two surveys of bracken fern for the concentration of the carcinogen ptaquiloside (PT) have been carried out, one of bracken fern from the eastern side of Australia and the other from a worldwide collection of bracken clones held in Sydney Australia. Bracken from eastern Australia contained
Dissipation of pterosin B in acid soils - Tracking the fate of the bracken fern carcinogen ptaquiloside.
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Prijava / prijava
Bracken ferns (Pteridium spp.) are well-known for their carcinogenic properties, which are ascribed to the content of ptaquiloside and ptaquiloside-like substances. Ptaquiloside leach from the ferns and may cause contamination of drinking water. Pterosin B is formed by hydrolysis of ptaquiloside. In
Mechanism of bracken fern carcinogenesis: evidence for H-ras activation via initial adenine alkylation by ptaquiloside.
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Prijava / prijava
Bracken fern (Pteridium spp.) causes cancer of the oesophagus and the urinary bladder in cattle and sheep. Ptaquiloside (PT) is believed to be the carcinogenic principle which alkylates DNA when activated to its unstable dienone form (APT) under alkaline conditions. In this report we present
Ptaquiloside in Irish Bracken Ferns and Receiving Waters, with Implications for Land Managers.
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Prijava / prijava
Ptaquiloside, along with other natural phytotoxins, is receiving increased attention from scientists and land use managers. There is an urgent need to increase empirical evidence to understand the scale of phytotoxin mobilisation and potential to enter into the environment. In this study the risk of
Genotoxic activity and inhibition of soil respiration by ptaquiloside, a bracken fern carcinogen.
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Prijava / prijava
Ptaquiloside (PTA) is a natural toxin produced by bracken (Pteridium aquilinum [L.] Kuhn). Assessment of PTA toxicity is needed because PTA deposited from bracken to soil may leach to surface and groundwater. Inhibition of soil respiration and genotoxic activity of PTA was determined by a soil
Bracken fern carcinogenesis: multiple intravenous doses of activated ptaquiloside induce DNA adducts, monocytosis, increased TNF alpha levels, and mammary gland carcinoma in rats.
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OBJECTIVE
(1) establish a rat model for investigating ptaquiloside (PT) carcinogenesis via intravenous dosing; (2) determine the role of activated PT (APT) in this model; and (3) monitor changes at molecular (DNA adducts, TNF alpha levels) and cellular (histopathology) levels.
METHODS
Sprague-Dawley
Mass spectrometric analysis of ptaquiloside, the toxic sesquiterpene from bracken fern.
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Norsesquiterpene glycosides in bracken ferns (Pteridium esculentum and Pteridium aquilinum subsp. wightianum) from Eastern Australia: reassessed poisoning risk to animals.
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Prijava / prijava
Austral bracken Pteridium esculentum contains three unstable norsesquiterpene glycosides: ptaquiloside, ptesculentoside, and caudatoside, in variable proportions. The concentration of each of the glycosides was determined in this study as their respective degradation products, pterosin B, pterosin G
Ptaquiloside in bracken spores from Britain.
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Prijava / prijava
Secondary metabolites from bracken fern (Pteridium aquilinum (L.) Kuhn) are suspected of causing cancer in humans. The main carcinogen is the highly water-soluble norsesquiterpene glucoside ptaquiloside, which may be ingested by humans through food, e.g. via contaminated water, meat or milk. It has
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