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Biomedical subjects

A V Novikova

Publications and source records attributed to A V Novikova.

At least 37 records · Page 2Linked to original sources
PubMed1982

[Features of inflammation of the mucosa of the large intestine in nonspecific ulcerative colitis and Crohn's disease].

Histological, morphometric, and immunohistochemical studies (with detection of the local production of IgA, IgM, IgG, IgE, and IgD, secretory component of IgA, and deposition of the third complement component, C3) were carried out on biopsies of the colon mucosa from 66 patients with recurrent and continuous forms of nonspecific ulcerative colitis and 16 patients with Crohn's disease. Inflammation in the colon mucosa in the diseases under study was found to be accompanied by marked activation of the local immune system, increased local production of IgA and IgM as well as IgG, particularly in those parts of the mucosa which had no glands. Local synthesis of IgE and IgD also increases indicating allergic reaction in the mucosa alongside with tissue eosinophilia. The basal membrane of the surface epithelium was found to have C3 depositions. A typical feature was the lack of correlation between infiltration of the layer proper of the mucosa and epithelium which is regarded to be a manifestation of deficiency of T-lymphocytes (subpopulation of suppressors or lymphocytes taking part in regulation of epithelium regeneration).

Biopsy↗
PubMed1982

[Systemic and local immunity problems in protracted and chronic dysentery in children].

The results of the study of systemic and local immunity in cases of prolonged and chronic dysentery in children are presented. These results indicate that a decrease in the levels of immunoglobulins and specific IgM and IgA antibodies in the blood serum and coprofiltrates was observed as the process became chronic. The titer of specific IgG antibodies in the serum remained on a relatively high level, thus indicating the presence of the active infectious process. The low level of specific IgA antibodies correlated with a decrease in IgA-producing cells in the mucosa of the large intestine, which suggested that this form of the disease was accompanied by disturbances in the mechanisms of local immunity.

Antibody Specificity↗
PubMed1979

[Comparative study of modifications in the immunoperoxidase and immunofluorescent methods of detecting human tissue immunoglobulins].

The comparison of the data obtained by using different modifications of the immunoperoxidase and immunofluorescent methods for detecting immunoglobulins in intestinal tissues was made. The direct immunoperoxidase method was shown to allow the quantitative study of immunoglobulin-containing cells. The direct immunoperidase method was found to be technically simpler, but the indirect and complex peroxidase-antiperoxidase methods proved to be more sensitive.

Animals↗
PubMed1978

[Determinaton of intracellular immunoglobulins by means of immunofluorescence. 1. The standardization of monospecific luminescent antisera against human G-, A- and M-class immunoglobulins in bone marrow preparations from patients with paraproteinemic hemoblastosis].

To assess the specificity and the activity of fluorescent antisera against human G-, A-, M-classes the authors used in the capacity of a substrate, containing specific antigen preparations, bone marrow cells of patients with paraproteinemic hemoblastosis. The method of making the preparations used permitted sufficiently objective assessment of the activity and specificity of the mentioned monospecific fluorescent conjugates. As revealed, the bone marrow preparations could be stored at -70 degrees C for over one year.

Antibodies, Anti-Idiotypic↗
PubMed1978

[Jejunal mucosa in infants with the syndrome of disorders of intestinal absorption (ultrastructure and morphometry)].

Ultrastructural studies and counts of interepithelial lymphocytes and the density of cellular infiltration of the lamina propria were carried out on 10 biopsies of the small intestine from infants of 4 months to 2 years with the syndrome of disturbed intestinal absorption. The greatest disorders were found to occur in celiac disease and intolerance to cow milk protein and to be manifested in subtotal atrophy of villi and destructive lesions of enterocytes. The authors believe that the marked infiltration of the epithelial layer with lymphocytes and the lamina propria of the mucous membrane with plasma cells represent manifestations of the local immunological response.

Animals↗
PubMed1977

[Quantitative characteristics of the immunocompetent cells of the large-intestinal mucosa in acute dysentery].

Histological and immuno-morphological examinations of the large intestine mucosa obtained by aspirational biopsy from 38 adult patients with acute dysentery in the mild, moderately severe and severe forms and from 4 normal subjects were carried out. In each case, a per cent ratio of immunocompetent cells in deep and superficial parts of the mucous membrane proper, the content of interepithelial lymphocytes, the cell density of infiltrate per 1 mm2 of the mucous membrane, the number of cells producing IgA, IgM, and IgG per 1 mm2 of the mucous membrane were determined. As the severity of clinical and morphological manifestations of dysentery increased, the number of cells actively producing immunoglobulins was found to increase and epithelium infiltration with lymphocyte to be enhanced. The main role in the development of local immune response in dysentery is played by IgA-producing cells, and in the moderately severe and severe forms of dysentery the number of IgM-producing cells increases.

Adult↗
PubMedDate not supplied

[Morphologic features of the gastric mucosa in systemic lupus erythematosus and antiphospholipid syndrome].

Morphology of gastric mucosa is characterized in the presence of Helicobacter pylori (HP) and Herpes viruses (HSV-1 and CMV). A total of 85 patients were examined (20 patients with primary APS and 65 with SLE). Chronic active gastritis was revealed in 85% patients with APS and 96% with SLE. 60% patients with APS and 45% with SLE had mucosal erosions. HP was detected in 70-87% of cases. Mixed infection of the gastric mucosa was observed in all the groups which was significantly associated with increased fibroblast and plasma cell number in the tunica propria. Tissue eosinophilia of the antral part of the stomach was observed in 39% of SLE patients. Glucocorticoid therapy was not associated with erosions and was combined with vascular thrombosis of gastric mucosa.

Adult↗
PubMedDate not supplied

[Clinico-endoscopic and morphometric characteristics of gastric and duodenal mucosa in children with dermatomyositis].

A total of 53 patients with dermatomyositis aged 4-14 with the disease duration of three months to eight years were under observation. Twenty seven patients complained of stomach-ache, II felt pain during palpation, 30 lost appetite. Electrogastrography revealed disorders in bioelectric activity of the stomach muscles in 99.9% of the patients. Endoscopic studies revealed lesions in the stomach and duodenum in all the patients, in 39 of them gastroduodenitis in the stage of exacerbation was diagnosed, in 7 erosion, in 3 peptic and duodenal ulcer. In 81.3% of the children during clinico-laboratory remission of dermatomyositis gastroduodenitis persisted at the stage of exacerbation. The vessels lying in the mucosa of the antral area of the stomach and duodenum underwent peculiar changes: arterial walls looked thickened, nuclei of the endothelial cells were enlarged, rounded up. One could observe infiltrates around the vessels consisting mainly of lymphocytes. Morphometric indices of the mucosa were also different in the antral area of the stomach and duodenum. Apparently, changes revealed in the gastric and duodenal mucosa of children with dermatomyositis occur due to vascular processes developing as a result of the main disease. This should be taken into consideration in the treatment of such children.

Adolescent↗