среда, 19 ноября 2008 г.

Prednisolonum

Prednisolonum quickly (but more slowly, than a hydrocortisone) is metabolized in a liver and in a kind is deduced with urine. The period of semipurification of plasma makes about an hour, and through 2 3 the preparation practically disappears from blood. However metabolic effects order ultram cheap in tissues remain within many hours. Some preparations are capable to influence concentration of Prednisolonum and other corticosteroids. In particular, phenobarbital and rifampicin intensify a metabolism of these hormones and by that reduce their medical action. The risk of a hyperglycaemia of potassium loss is enlarged by it at simultaneous appointment of Prednisolonum and Hypothiazidum (and other diuretics of this group). It is especially important, that simultaneous application and Acidum acetylsalicylicum so lowers level of last in blood, that its concentration appears below therapeutic [Hart F., 1978].
Physiological effects are surveyed basically as antiinsulinic and include regulation of an albuminous, carbohydrate, lipide and nucleic exchange. Influence on proteometabolism mainly catabolic, shown in the raised disintegration of fibers and the enlarged allocation of nitric products. At the same time the glycogen maintenance in a liver is enlarged, and its synthesis raises at the expense of use of products of an albuminous and lipide exchange (). As initial products amino acids from bones, skins, muscles and the connecting tissue, mobilised both owing to the raised catabolism of fiber, and in connection with oppression of its synthesis are used. Rising of level of amino acids arising thus stimulates secretion of the glucagon also promoting in blood. are necessary for mobilisation of fat acids as they do possible activation of a cellular lipase by substances - catecholamins and peptides. Synthesis of nucleic acids in the majority of tissues of a body is oppressed, but synthesis (just as synthesis of fiber and of some enzymes) is stimulated in a liver.
Specific influence on a cell sensitive to its effects begins with interaction of a steroid and specific fiber - the steroid receptor which is in a cytoplasma. Then the complex a steroid - a receptor is transported to a kernel where co-operates with a chromatin (apparently, from DNA). The RNK-INTERMEDIARY, inducing in a cytoplasma synthesis of specific fiber which mediates concrete physiological effects is as a result synthesised specific. Influence of surveyed hormones on structural fibers and a fatty tissue variously in different parts of a body. So, even pharmacological doses can essentially reduce the fiber maintenance in an osteal matrix of vertebra, but influence long bones a little; the vpxl cheap combination of the enlarged adiposity on an abdominal wall and between scapulas with reduction of a fatty tissue of extremities is quite often observed.
support enough of extracellular water, interfering with its entering in cells. They suppress secretion by a pituitary body of an antidiuretic hormone and raise rate of a glomerular filtration, that in a combination to direct influence on canaliculuses enlarges a clearance of free water. They also oppress secretion , development of a somatotropic hormone by a pituitary body and with a liver.
Glucocorticoids make certain impact on mentality of the person. Appreciable emotional disorders are observed both at their excess in an organism, and at insufficiency.
Antiinflammatory action of glucocorticoids depends substantially on their normalising influence on a hyperpermeability of capillaries. Steroids support normal reaction of vessels of a microcirculatory bed to vasoconstrictive stimulus, interfering with that to influence of mediators of the inflammation dilating these vessels and raising their permeability. They oppress also migration of neutrophils in the inflammation centre that contacts inhibition of endothelial attachment of leucocytes in the inflamed area and their subsequent emigration. This effect explain, in particular, antagonism with the factor limiting migration of leucocytes which is developed by lymphocytes and macrophages. Braking influence on a chemotaxis of neutrophils and their ability to a phagocytosis though the total of neutrophils in peripheric blood at corticosteroid therapy is enlarged at the expense of stimulation of their exit from an osteal brain Is supposed also. Corticosteroids interfere with accumulation in the centres of an inflammation of monocytes as in connection with retardation of remission of mature monocytes from an osteal brain, and owing to reduction of their mobility, and bactericidal activity. Activity of fibroblasts that can lead to restriction of sclerotic processes chokes also.

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