In generalized BCG granulomatosis, fibrosis starts early (on day 3) and not only around the granulomas, but also in the organs. The severity of organ fibrosis is apparently determined by the concentration of granulomas, in particular their macrophages inducing proliferation of fibroblasts in organs and granulomas as well as activation of fibrogenesis. On day 30 after infection, the degree of fibrosis in the lungs was by 6 times higher than in the liver. The increase in hydroxyproline concentration in organs in early period of infection was determined by acute stress, while on day 30 it resulted from its enhanced synthesis by granuloma fibroblasts and resident fibroblasts in organs.
The content of ceruloplasmin was studied in W/SSM rats with hereditary galactosemia. Carbohydrate component constitutes about 40% of the molecule of this antioxidant. The content of ceruloplasmin in 2- and 11-month-old W/SSM rats was elevated compared to the corresponding parameters in Wistar rats.
Experiments on the model of mouse BCG-induced granulomatous showed that the content of glycosaminoglycans and proteoglycans in the extracellular matrix of the liver and lungs are changed at the early stages of inflammation (days 3 and 30 postinfection) before cell destruction in the organs begins. This is related to degradation of extracellular matrix structures. Their high content in the blood and interstitium probably contributes to the formation of granulomas, fibroblast proliferation and organ fibrosis. These processes depend on the infection route that determines different conditions for generalization of the inflammation process. Intravenous method of vaccine injection is preferable to use when designing the experiments simulating tuberculosis granulomatosis, especially for the analysis of its early stages.
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