O. G. Khaziakhmatova

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The alternative splicing of the Ptprc gene is a key event in memory T-cell differentiation. This gene encodes a transmembrane tyrosine phosphatase CD45. One of the potential mechanisms of alternative splicing regulation is based on the antagonistic effects of a U2AF26 auxiliary splicing factor and Gfi1 transcription factor. These two proteins regulate(More)
Glucocorticoids are anti-inflammatory and immunosuppressive agents with pleiotropic effects on the growth, differentiation, and functional activity of T lymphocytes. The comprehensive assessment of the influence of dexamethasone on the functional activity of T cells with different grades of differentiation was performed under experimental in vitro(More)
Opposite effects of common γ-chain cytokines (IL-2, IL-7, and IL-15) on the expression of Gfi1 and U2af1l4 genes regulating alternative splicing of Ptprc gene in T cells at different stages of differentiation were demonstrated in vitro. Generally, produced a dose-dependent activating effect on T cells, while to the effects of rIL-7 and rIL-15 on T cells at(More)
The effect of human pregnancy-specific glycoprotein (PSG) on the cytokine and chemokine production in vitro by intact mononuclear cells was studied by the method of flow fluorimetry. PSG inhibited production of the proinflammatory cytokines IL-6, IL-8, IL-17, IFN-γ, and TNF-α and chemokines CCL3/MIP-1α, CCL4/MIP-1β, CCL2/MCP-1; at the same time, PSG(More)
Morphofunctional response of Jurkat T cells that were cultured for 24 h on substrates prepared from commercially pure titanium with relief microarc bilateral calcium phosphate coating containing copper or zinc was studied. Changes in the concentration of essential trace elements contained in this coating can cause significant imbalance of molecular(More)
Human leukemic T lymphoblastoid cells (hereinafter, Jurkat T cells) have been used to model the morphofunctional reaction of T lymphocytes to 24-h in vitro contact with relief (roughness index Ra = 2.2–2.7 μm) pure titanium substrates (12 × 12 × 1 mm3) covered by a calcium phosphate (CP) bilateral coating prepared by the microarc method. Jurkat T cells(More)
The effect of different concentrations of the glucocorticoid (GC) methylprednisolone (MP) on CD4+CD95+HLA-DR+ T-cells and their ability to produce proinflammatory mediators in cultures of TCR-stimulated CD3+CD45RO+ T-lymphocytes in the in vitro system was investigated. T cells were obtained from healthy donors and patients with rheumatoid arthritis(More)
The dose-dependent effects of cytokines (IL-2, IL-7, and IL-15), which have a common g-chain, on mRNA expression of U2afll4 and GFi1 genes involved in regulation of alternative splicing of the Ptprc gene, have been investigated in vitro using T-lymphocyte cultures with different degrees of differentiation. IL-2, IL-7, and IL-15 caused a similar(More)
The role of human pregnancy-specific β1-glycoprotein (PSG) in the regulation of expression of the transcription factor FOXP3 was studied. It is found that, under conditions of directed induction of phenotypic changes in CD4+ lymphocytes to regulatory T cells (Treg), PSG at high concentrations (10 and 100 μg/mL) increased FOXP3 expression. The evaluation of(More)
The effect of cytokines (IL-2, IL-7, and IL-15) having a common γ-chain of receptors on the maturation and differentiation of CD3+CD45RA+CD4+/CD8+ lymphocytes in homeostatic cultivation model in vitro was analyzed. It was found that the maximum IL-2 concentration in the helper CD45RA+-T-cell population mediates an increase in the number of CD45RA+CD4+ T(More)