Gene/Protein Disease Symptom Drug Enzyme Compound
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A study was made of the effects of exogenous adrenocorticotropin (ACTH) on the levels of blood components in 109 dairy replacement calves and the statistical correlations between these effects and the growth rates of the calves from birth to six months. Blood samples were taken from a jugular vein before ACTH was injected and then at two, four, six and eight hours afterwards, and analysed for plasma cortisol concentration, total white cell counts, packed cell volume, haemoglobin, plasma glucose, sodium, potassium, magnesium and inorganic phosphorus, erythrocyte sodium, potassium and magnesium, serum ionised calcium and total protein and total plasma calcium concentration. The injection of 1.1 +/- 0.02 iu/kg of ACTH intramuscularly resulted in a peak plasma cortisol concentration after two hours which had not returned to normal after eight hours. It also resulted in leucocytosis, lymphopenia, neutrophilia, eosinopenia and hypophosphataemia; the mean changes were repeatable (P < 0.05) in 49 of the calves tested two months later. The weight gains to six months of age could be predicted from the degree of the changes in several blood constituents. Significant partial regression coefficients were found for the change in glucose concentration (0 to four hours), absolute neutrophil count (0 to two hours), absolute lymphocyte count (0 to four hours) and loge absolute eosinophil count (0 to two hours). The multiple regression sum of squares was highly significant (P < 0.0001), and the multiple coefficient of determination was 0.305. It was concluded that the changes in these blood components after an injection of ACTH might be used to predict the weight gains of dairy replacement calves.
Vet Rec 1995 Jul 08
PMID:Responses of calves to injections of ACTH and their relationship with growth rate. 852 81

Following an outbreak of wobbly possum disease in a colony of brush tail possums (Trichosurus vulpecula), the disease was established experimentally in captive possums by inoculating the animals intraperitoneally with tissue homogenates. Crude tissue homogenates of liver remained infectious after freezing at -75 degrees C or filtration through a 0.22 micron filter. The disease was characterised by docility, incoordination, loss of balance and wasting. Fifteen of 16 infected animals had to be euthanased owing to the severity of clinical signs. Cachexia was the only change observed postmortem. Histology revealed widespread perivascular infiltrations with plasma cells and lymphocytes which were severe in the liver and kidney and moderate to mild in a variety of other tissues, including skeletal and cardiac muscle. Changes in the brain consisted of a mild to moderate mononuclear perivascular cuffing. Most of the animals had small to large numbers of circulating nucleated red blood cells and eosinopenia when they were euthanased. There was a consistent decrease in serum albumin concentration and an increase in serum globulins, which resulted in a decreased albumin:globulin ratio. Virus-like particles were observed in preparations of liver from two animals; they appeared to be spherical or icosahedral and were 45 nm in diameter.
Vet Rec 1997 Aug 30
PMID:Pathological studies of wobbly possum disease in New Zealand brushtail possums (Trichosurus vulpecula). 930 Oct 11

Bovine lactoferrin was administered orally, in feed, to six bottlenosed dolphins (Tursiops truncatus) before they were transported for approximately six hours; their stress responses were compared with those of five untreated dolphins. During the journey the dolphins had an increased plasma concentration of cortisol, and lymphopenia, eosinopenia and mild neutrophilia, indicating a stress response. The administration of lactoferrin did not affect the function of the dolphins' polymorphonuclear leucocytes, but affected their leucogram by maintaining the number of circulating eosinophils.
Vet Rec
PMID:Effect of bovine lactoferrin on the immune responses of captive bottlenosed dolphins (Tursiops truncatus) being transported over long distances. 1718