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Biomedical subjects

V A Trufakin

Publications and source records attributed to V A Trufakin.

At least 55 records · Page 3Linked to original sources
PubMed1985

[Changes in the lactate dehydrogenase isoenzyme spectrum during T-lymphocyte differentiation].

The pattern of lactate dehydrogenase isoenzyme spectrum changes on different stages of T-lymphocyte differentiation was studied An enriched population of stem cells has LDH-5, 4 and 3 isoenzymes, and much less LDH-2 activity. The isoenzyme pattern of thymic cell precursors consists of LDH-5, 4, 3 and 2. All the five LDH isoenzymes were found in cortical thymocytes. Medullary thymocytes reveal LDH-5, 4 and 3 isoenzymes. T-lymphocytes of peripheral lymphoid organs contain mainly LDH-5 and in a lesser degree LDH-4 activity.

Animals↗
PubMed1985

[Regional features of the cellular composition of different zones of lymph nodes in the adult human].

The amount of plasma cells is connected with intensity of humoral immunological reactions. In people died an accidental death, the amount of immature plasma cells is the least in the axillary and the greatest--in the mesenteric nodes, especially in the thymus-independent zone. The amount of lymphoblasts and large lymphocytes, reflecting intensity of the humoral and cellular immune reactions, is also the greatest in the mesenteric lymph nodes, both in the thymus-dependent and in the thymus-independent zone. In all probability, the intensity of the immunological processes is minimal in the axillary, it is middle in the iliac and cervical and it is maximal in the mesenteric lymph nodes. In each case it is probably connected with peculiarities of antigenic composition of the lymph inflow. The mesenteric lymph nodes are on the way of the foreign protein getting into the intestine. This is evidently reflected by the highest content of immature plasma cells, lymphoblasts and large lymphocytes in them.

Adolescent↗
PubMed1984

[Histophysiology of the intestinal epithelium as affected by the lymphoid system].

The possibilities of inducing immunocompetent tissue-dependent changes were studied with the help of the intestinal epithelium model. It was found that thymectomy of adult mice or transplantation of syngeneic thymocytes to recipients with normal intestine function did not lead to changes in the intestinal epithelium whereas the injection of antilymphocyte serum or thymocytes to fasting mice resulted in the diminution of the size of the stem department, inhibition of the mitotic activity, and appearance of dystrophic changes in the intestinal epithelium. It is suggested that population changes in the lymphoid tissue may lead to alterations in the intestinal epithelial cells with different degree of maturity.

Animals↗
PubMed1982

[Adenylate cyclase content of T- and B-lymphocytes of mice of different genotypes in an experimental autoimmune state].

The activity of adenylcyclase in T and B cells of lymph nodes and spleen has been investigated in intact and autoimmune mice Balb/c and C57B1. Strain differences in the enzyme activity of intact and autoimmune mice were observed. It is concluded that the determination of adenylcyclase activity in lymphoid cells makes it possible to reveal the peculiarities of cell maturation in normal and pathological mice of different strains.

Adenylyl Cyclases↗
PubMed1980

[Identification of Feulgen-stained mouse T- and B-lymphocytes].

Digitized images of Feulgen-stained normal murine T and B lymphocytes were analyzed by the computer and microphotometry. Differences between these cells were revealed. The entropy of optical density was found to show highly significant differences between T and B cells. The application of the automatic classification of T and B lymphocytes is discussed.

Animals↗
PubMed1980

[Analysis of lactate dehydrogenase isoenzymes in murine lymphocyte populations].

The pattern of lactate dehydrogenase isoenzyme has been examined for different murine lymphoid cell populations and for T and B lymphocyte populations. LDH-1, LDH-2, LDH-3, LDH-4 and LDH-5 were found in the thymus, LDH-3, LDH-4 and LDH-5 in the spleen, and LDH-4 and LDH-5 in lymph nodes. Enrichment of lymphocytes with T and B cells resulted in the appearance of LDH-4 and LDH-5 in T cell population, and of LDH-5 in B cell population. With the appearance of the autoimmune reaction, activity of LDH-5 in the thymus was seen to decrease. After the thymosin injection (4 fraction), activities of LDH-1, LDH-2 and LDH-3 diminished. A possible application of the LDH isoenzyme distribution pattern as a marker of T cell differentiation is discussed.

Animals↗
PubMed1978

[Diurnal variations in the cellular composition of peripheral blood in mice of different genotypes].

Changes of the circadian rhythm of the general numbers of nucleus-containing cells and leucograms of peripheral blood in NZB mice with autoimmune spontaneous hemolytic anemia and in C57BL mice without visible disturbances in the system of immunostructural homeostasis were the most obvious in the white blood in NZB mice: a) disappearance of the circadian rhythm of the general number of nucleus-containing cells in peripheral blood owing to the inversion of circadian rhythm of the absolute number of neutrophiles; b) changes of circadian fluctuations of lymphocytes-neutrophiles ratio. The observed differences in circadian rhythms of hematological indices in NZB and C57BL mice seem to stem from insufficiency of adrenal cortex function and/or changes in functional state of hemopoietic tissue which can occur during the development of autoimmune processes.

Anemia, Hemolytic, Autoimmune↗
PubMed1977

[Effect of somatotropic hormone on autoimmune responses induced in mice of different genotypes by syngenous heated erythrocytes].

A single administration of 1 X 10(9) heated erythrocytes to C57BL and BALB/c mice caused on the 13th day the appearance of antierythrocytic autoantibodies, an increase in the weight of the lymphoid organs, and lymphoreticular hyperplasia. These changes were more pronounced in BALB/c mice. During the development of autoimmune reactions the changes in the number of E- and EAC-rosette-forming cells in the thymus and spleen and in the immune response to the sheep erythrocyte immunization and E. coli endotoxin were revealed; distinct strain differences were observed. Daily somatotropic hormone administration (5 mg/kg of body weight) for 10 days decreased the degree of the autoimmune reactions development in mice of both strains. Its action was more expressed in BALB/c mice.

Animals↗
PubMed1977

[Cytological identification of the lymphocytes in highly leukemic AKR/J mice in ontogenesis. Effect of somatotropin on the cellular composition of the lymphoid organs].

In AKR/J mice lymphocytes of thymus, spleen and lymph nodes can be classified according to their morphology as revealed by the Stockinger and Kellner staining: I--basophilic cytoplasm, 1--3 large basophilic nucleoli (blast cells), II--basophilic cytoplasm, 1--4 small clearly visible nucleoli (T-lymphocytes), III-weakly basophilic cytoplasm, 1-4 small fairly visible nucleoli (B-lymphocytes). The number of cells of types I and II increases with the progressing of leucaemia. After the administration of somatotrophic hormone the number of cells of types I and II increases only in the lymphoid organs of 5 months old AKR/J mice.

Animals↗
PubMed1976

Quantitative characteristics of antibody forming cells in partial tolerance.

Direct PFC to SRBC were enumerated simultaneously by the LHL and LHG in the spleens of partially tolerant and control rats. The sensitivity of LHL was higher than that of LHG, but the factor by which the number of PFC was higher in LHL than in LHG was in the two groups similar (1.44 in tolerant and 1.47 in control group). When the plaque size distribution was studied in the LHL, a significant increase in small size plaques was observed in tolerant rats. The findings are discussed and the conclusion is reached that the decrease in AFC number and not in antibody production by individual PFC is the main factor responsible for partial tolerance.

Animals↗
PubMed1975

[Effect of thymocytes on the quantity of polypotent hematopoietic mast cells in the spleen of sublethally irradiated mice].

With the aid of Till and McCulloch's method, 5 times 10(-6) thymic cells were found to cause an increase in the number of hemopoietic endogenous spleen colonies in syngeneic donor-recipient combination. Thymic cells of C57BL mice had no effect on the number of endogenous colonies in the spleen. 40 times 10(-6) thymic cells administered 24 hr after sublethal irradiation caused an increase in the number of colony forming units in the spleen within 14 days. Possible ways of the thymus effect on hemopoiesis are discussed.

Animals↗