[Immune reactions in vascular diseases].
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Biomedical subjects
Publications and source records attributed to S Gerö.
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The presence of circulating immune complexes was studied in 347 samples of serum from 212 patients with various vascular diseases. Two quantitative methods (complement-consumption assay and C1q-solubility test) were used for the measurement of the concentration of the complexes. Immune complexes were detected in each group of patients tested (coronary arteriosclerosis, myocardial infarction, cerebral artery sclerosis, arteriosclerosis obliterans, phlebothrombosis, pulmonary infarction). A high proportion of positivity was recorded in myocardial infarction (in 43 patients out of the 94 tested) and in arteriosclerosis obliterans (7 out of 11 cases). The possible pathogenic role of the circulating immune complexes is discussed.
Cholesterol-fed rabbits were treated with clofibrate, pyridinol carbamate and with both drugs simultaneously. The quantity of circulating immune complexes in the sera of the animals was measured weekly and the migration inhibition test was carried out in the 12th week of the experiment. The trend of the changes in the concentration of the immune complexes was rather similar to that of the cellular immune response. Compared with the values obtained in the control animals, in the cholesterol-fed group a markedly higher level of immune complexes and a significant migration inhibition could be detected. The administration of clofibrate or pyridinol carbamate alone had no effect on the concentration of immune complexes. Pyridinol carbamate did not influence the migration inhibition; however, it became similar to the healthy controls in the clofibrate-treated group. Simultaneous treatment with both drugs resulted in a decrease in the quantity of immune complexes and a diminution of the migration inhibition.
The effects have been studied of human vessel wall on the cell-mediated and humoral immune response, as well as the morphological changes produced in the aorta in guinea-pigs. In animals immunized with calcium chloride-tris-citrate extracts of the aortic and vessel wall a definite cell-mediated and humoral immune response was observed. A cross-reaction was found between the 2 vessel wall extracts in the skin test and in the migration inhibition test. The induction of desoxyribonucleic acid synthesis was found to be specific. Antibody production as well as the concentration of IgG in the serum was increased. Simultaneously with increased production of the antibodies the cellular immune response did not diminish util the 9th week. A definite alteration was found in the aortic intima by histological, histochemical, immunofluorescence and electron microscopic methods. In addition some slight changes could be observed in the media and in the aventitia of the aorta.
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The results of our preliminary investigations support the opinion that a modification of the macromolecular components of the arterial or venous tissue conditioned by a certain aggression may stimulate the formation of auto-antigens and lead to a humoral as well as cellular immune reaction.
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