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Stimulatory effects of selenium on mitogen responses in lambs 总被引:2,自引:0,他引:2
Separated lymphocytes from untreated and selenium-supplemented lambs were tested in culture against phytolectins (phytohaemagglutinin and pokeweed mitogen). Levels of response varied considerably among individuals, and this tended to mask the effects of selenium. However, cells from both groups were more active in the presence of serum from supplemented animals, and a similar stimulatory effect was achieved by adding sodium selenite in vitro. Thus selenium could exert a direct influence on the performance of immunocompetent cells. 相似文献
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Studies on serum tocopherol and selenium levels and blood glutathione peroxidase activities in lambs with white muscle disease 总被引:2,自引:0,他引:2
S Osame T Ohtani S Ichijo 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1990,52(4):705-710
For the investigation of the cause of white muscle disease (WMD), tocopherol (Toc) and selenium (Se) levels and blood glutathione peroxidase (GSH-Px) activities were examined using lambs with WMD and their ewes. Serum Se levels of 4 lambs with WMD were low under 30 ppb, lambs showing very low levels below 15 ppb. The serum Se level was correlated with blood GSH-Px activity showing remarkably low activities in the lambs with WMD. Se contents in the organs of lambs with WMD were lower than those of control lambs, and particularly liver Se contents were deficient levels below 50 ppb. Serum Toc levels were normal, but alpha-Toc contents in organs showed very low levels, especially in the liver. The serum Toc and Se levels and blood GSH-Px activities of their ewes and other sheep kept in the same farm revealed similar results to those of lambs with WMD. Feedstuffs supplied on the farm showed the deficient level of the Se content below 50 ppb and a very low level of alpha-Toc. It was concluded that WMD of lambs in Hokkaido was nutritional muscular dystrophy resulted from deficiencies of Toc and Se to their ewes. 相似文献
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Congenital white muscle disease in a calf 总被引:1,自引:0,他引:1
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The relationship between the optimum concentration of mitogen which induces lymphocyte blastogenic response and the receptor occupancy by mitogen was investigated. The receptor occupancies which induced maximal blastogenic activity in equine, bovine and canine peripheral blood lymphocytes (PBL) were 31.1 per cent, 26.5 per cent and 38.4 per cent with phytohaemagglutinin-P, and 48.2 per cent, 17.9 per cent and 24.5 per cent with concanavalin A, respectively. The data clearly show that each animal species had its own optimum concentration of mitogen for stimulation of PBL. Optimum concentration for blastogenesis and number of binding sites of each mitogen had a good correlation with each other for all three species. 相似文献
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In this case report about white muscle disease (WMD) in a Belgian Blue herd, the disease is described both as an individual and as a herd problem. Aetiology, diagnosis, and therapy of WMD are discussed. WMD is a disease of animals with muscle damage due to the presence of free radicals. Unsaturated fatty acids in the cell membrane are transformed into a radical form in a chain reaction: a fatty acid next to the fatty acid radical can be transformed into another free radical. In healthy animal the chain reaction is stopped by anti-oxidants such as vitamin E and glutathione peroxidase. WMD can occur when more free radicals are produced than the available anti-oxidants can deal with. The disease occurs in calves, lambs, and foals. 相似文献
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R.G. Clark I.S. Cornforth B.A.H. Jones L.J. McKnight J. Oliver 《New Zealand veterinary journal》2013,61(12)
Abstract Extract Sir,— Ovine white liver disease (WLD) is a recognized entity in Northland and other parts of the North Island. In Northland, the disease occurs sporadically as a flock problem, mainly in lambs, during the warmer time of the year. Affected animals may show a failure to thrive, sometimes with anaemia, photosensitivity and a pale, swollen, fatty liver with characteristic h'stological changes. The disease is often associated with low liver vitamin B12 levels and intestinal nematode parasitism. It has been suspected that a fungal toxin may be involved5. 相似文献