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Biomedical subjects

I S Freĭdlin

Publications and source records attributed to I S Freĭdlin.

54 records · Page 3Linked to original sources
PubMed1975

[Restitution of the immune response by macrophages following administration of immunodepressants to mice].

A study was made of the restitution by peritoneal macrophages of the primary immune response in the organism of C3H mice immunized with bacteriophage T2 after the depressive effects of actinomycin D, olivomycin, rifamycin, chloroquin, chloramphenicol, of the histone F2a fraction and LPS. The cell transfer technique was used for studying the capacity of macrophages from normal mice to restitute the antibody synthesis in mice given immunosuppressive drugs. In cell transfer experiments the recipients immunosuppressed by drugs were capable of initiating a normal primary response to bacteriophage T2 when given macrophages from normal donors. The data obtained with the drug-treated recipients supported the concept that the antigen processing by the macrophage was necessary for initiating a primary type immune respones; they also demonstrated the selective susceptibility of macrophages to the immunosuppressive drugs.

Animals↗
PubMedDate not supplied

[Autoimmune disorders in liqvidators 11 years after the Chernobyl accident].

We studied long-lasting consequences of the low-doses irradiation on the immune system of 71 clean-up workers who participated in the emergency work after the Chernobyl Plant accident in 1986 and 25 healthy donors from Belarus. In sera of the workers the level of autoantibodies to thyroid gland antigens (thyroglobulin and microsomal fraction of thyroid gland) was increased in 48% of cases, the level of autoantibodies to lens oculis antigen was increased in 44% of cases; the level of circulating immune complexes was elevated in 55%, and the serum level of thyroglobulin in 60% of people. Immunological disorders were found without any definite clinical evidences of diseases and this allows us to consider the examined contingent as a group of risk for the development of autoimmune pathology in the future.

Adult↗
PubMedDate not supplied

[Effect of anesthesia with xenon and nitrous oxide with fentanyl on dynamics of cellular immunity and cytokines].

Immunological parameters were studied at randomization in 60 surgical patients during the similar operation--cholecystectomy made under combined endotracheal low-flow general anesthesia using N2O:O2+fentanyl in 32 patients and Xe:O2 in 28 patients. The time course of changes in cellular immunity and cytokines was closely related to the type of an anesthetic. Unlike N2O:O2+fentanyl, Xe did not show such a marked proinflammatory activity, exerted a mild normalizing effect on leuko- and lymphopoiesis, had an immunostimulating activity, and reduced the frequency of postoperative inflammatory complications and the length of stay at hospital. The differences in the action of the anesthetics were due to the fact that Xe had a greater narcotic potential, a protective action on neuroendocrine function, and no toxicity. Xe is indicated to patients with baseline immunodeficiency.

Adjuvants, Anesthesia↗
PubMedDate not supplied

[The role of hyperinsulinemia in the immunopathogenesis of atherosclerosis in diabetics].

In chronic insulin overdosage patients with insulin-dependent diabetes mellitus have marked shifts in the values of blood serum lipid spectrum, increased number of circulating immune complexes correlating with the increased amount of immunoreactive insulin, and considerable shifts of the functional and metabolic characteristics of blood monocytes. Chronic overdosage of insulin leads in these patients to stable shifts of biochemical and immunological values similar to those encountered in patients with ischemic heart disease but without diabetes. These shifts persist in stable normoglycemia and predispose to the development of atherosclerosis.

Adult↗
PubMedDate not supplied

[Origin and evolution of peptide-protein bioregulators].

Possible evolutionary pathways of cellular regulatory systems are discussed. Analysis of animal evolution suggests that peptide and protein bioregulators emerged at an early stage during formation of biochemical systems in prokaryotic cells involving protein synthesis on ribosomes, the processes of exo- and endocytosis and limited proteolysis reactions. Primary autocrine bioregulators are compared with growth factors. Models for cellular bioregulation are discussed in which both cell receptors and peptide/protein ligands, primarily immunoglobins, act as prehormones. Their internalization and limited proteolysis can lead to formation of low-molecular peptides (tetines) acting as autocrine or paracrine bioregulators. Basing on the concept of biochemical universality, it is suggested that the effects of many growth factors, hormones, immunoglobulins, mono- and lymphokins are mediated by identical or similar (carrying the same signatures) fragments which are produced in cells due to limited proteolysis reactions and which are directly involved in activation of biochemical systems in these cells.

Animals↗