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Stran 1 iz 64 rezultatov
Tumor induction in germ-free rats fed bracken (Pteridium aquilinum).
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Prijava / prijava
This study indicated that there was no significant difference in the incidence of intestinal tumors between germ-free and conventional rats fed a diet containing bracken, suggesting that gut microflora did not play a definite role in bracken tumorigenesis. However, bracken induced exclusively
Bracken fern (Pteridium aquilinum) ingestion and oesophageal and stomach cancer.
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Prijava / prijava
Carcinogenicity of bracken fern (Pteridium esculentum) in New Zealand.
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Prijava / prijava
Bracken fern (Pteridium esculentum) was harvested from two sites LB and TB one of which (TB) was on a central North Island New Zealand farm where bovine enzootic haematuria (BEH) was known to occur. The fern was dried, ground and incorporated (25% w/w) into a pelleted diet and fed to female rats for
Carcinogenicity of boiling water extract of bracken, Pteridium aquilinum.
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Prijava / prijava
Carcinogenicity of an aqueous extract of bracken was studied in inbred strain ACI rats. In Experiment 1, Group 1 rats received a diet containing unprocessed dry bracken powder for 3 months, Group 2 received the boiling water extract of dry bracken as drinking water for 16 months, Group 3 received
Bracken fern (Pteridium aquilinum) poisoning in cattle in southern Brazil.
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Prijava / prijava
Epidemiological data on Pteridium aquilinum intoxication in cattle the state of Santa Catarina were obtained by review of diagnostic records from 1987 to 2001. Of 3,407 necropsied cattle, 244 (7.16%) were diagnosed as intoxicated by Paquilinum; 122 of those were of the hemorrhagic form, 103 had
Identification of carcinogenic tannin isolated from Bracken fern (Pteridium aquilinum).
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Prijava / prijava
We attempted to isolate a carcinogenic substance from bracken fern (Pteridium aquilinum), a naturally occurring toxicant responsible for the production of chronic enzootic hematuria and urinary bladder cancer of cattle and carcinogenic for various target organs of several species. Hot methanol
Ovine copper poisoning and pteridium aquilium-associated bovine urinary bladder tumor in Korea.
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Bracken fern (Pteridium spp.) carcinogenicity and human health--a brief review.
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Prijava / prijava
Bracken fern (Pteridium spp.), one of the most abundant plants on the planet, is well known to cause cancer naturally in sheep and cattle. It contains, in some locations, extremely high concentrations of ptaquiloside which almost certainly is its major carcinogen. Ptaquiloside is transferred through
Effects of selenium on Pteridium aquilinum and urethane-induced lung carcinogenesis.
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Prijava / prijava
The results of our previous study demonstrated that ptaquiloside, the main toxic agent found in Pteridium aquilinum, suppresses natural killer (NK) cell-mediated cytotoxicity. However, the ability of ptaquiloside to suppress the cytotoxicity of NK cells was prevented by selenium supplementation. NK
Immunosuppressive effects of Pteridium aquilinum enhance susceptibility to urethane-induced lung carcinogenesis.
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Prijava / prijava
Pteridium aquilinum (bracken fern), one of the most important toxic plants in the world, contains the toxic norsequiterpene ptaquiloside that induces cancers in humans and farm animals. Previous studies in the laboratory demonstrated immunotoxic effects produced by ptaquiloside, which are
Histopathogenesis of intestinal tumors induced by oral administration of bracken fern, Pteridium aquilinum in rats.
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Inhibition of carcinogenic effect of bracken fern (Pteridium aquilinum) by various chemicals.
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Prijava / prijava
The inhibitory effect of butylated hydroxyanosole (BHA), disulfiram, calcium chloride, and polyvinylpyrrolidone (PVP) on the intestinal and urothelial carcinogenicity of bracken fern (BF) was determined in albino rats. Of 10 groups of rats, one group received a normal diet, one received a
Induction of tumors in rats by bracken fern (Pteridium aquilinum) from Ouro Preto (Minas Gerais, Brazil).
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Prijava / prijava
1. The possible carcinogenicity of bracken fern (Pteridium aquilinum, common name: "Broto de Samambaia") which is used as food by the population of Ouro Preto (Minas Gerais, Brazil) and neighboring areas, was studied in rats. 2. Fifteen (6 female and 9 male) 45-day old Wistar rats were fed a diet
Ptaquiloside from bracken (Pteridium spp.) inhibits tumour-infiltrating CD8+ T cells in HPV-16 transgenic mice.
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Prijava / prijava
Bracken is a fern with worldwide distribution. Exposure to bracken toxins such as ptaquiloside is hypothesized to increase the risk of papillomavirus-related cancers of the upper digestive tract. Ptaquiloside is thought to be an immunosupressor, thus allowing for the development of viral lesions. We
Quercetin, a rat intestinal and bladder carcinogen present in bracken fern (Pteridium aquilinum).
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Albino noninbred weanling male and female rats were fed a basic grain diet (Group 1) or a basic diet supplemented with 33% bracken fern [BF (Group 2)] or 0.1% quercetin [purity, > 99% (Group 3)] for 58 weeks. The quantities of quercetin and kaempferol (a close structural analog) in BF as glycosides
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