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[Changes in the histostructure of functional activity of the immunocompetent organs in damaged portal blood supply of the liver].

In CBA mice calibrated stenosis of the portal vein was produced. Liver and immunocompetent organs were morphologically analyzed. The total number of hemopoietic stem cells in the bone marrow was estimated by the colony-forming cells and in the spleen after immunization with sheep red cells by the plaque forming method. It is established that stenosis of the portal vein (on the average by 45% and 58%) produced the histostructural changes in the liver and in the immunocompetent organs. Expression of morphological changes depended on the time elapsed after operation and the degree of the portal vein stenosis. These changes were the most pronounced on the 16-17th day when stenosis of the portal vein was 58%. The character of the changes in the number of the hemopoietic stem cells in the bone marrow and in that of antibody-forming cells in the spleen depended on the degree of the liver damage. These changes increased with the degree of the liver histostructure damage. The maximal liver damage was accompanied by a decrease of these indices.