title: [Cytokine-mediated regulation of expression of Gfi1 and U2afll4 genes activated by T-cells with different differentiation status in vitro].
abstract: 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 unidirectional inhibitory effect of various severity on restimulated CD45RO+ T-cells exposed to an antigen-independent activation; they caused a dose-dependent decrease of the U2af1l4 gene expression, and an increase of Gfi1 gene expression. This may suggest formation of active forms of the CD45 receptor, and also limitation of the formation of low-molecular short splice variants of the CD45RO receptor. Under conditions of antigen-independent stimulation of naive CD45RA+-cells rIL-7 and IL-15 exhibited opposite effects on U2af1l4 and Gfi1 gene expression. The increase of IL-7 concentrations in the incubation medium of naive cells was accompanied by a decrease in expression of both genes. IL-15 IL-7 exhibited opposite effects. Cytokines possessing a common g-chain (IL-2, IL-7, and IL-15) prevented antigen-independent differentiation of naive T-cells, by preventing the formation of polyclonal "surrogate" cells. In general, the study of the molecular mechanisms of genetic control determining homeostatic processes of T-cells in response to exposure to antigenic or non-antigenic treatments may be important for construction of a general model of self-maintenance and differentiation of immune cells.
authors.affiliation: Kant Baltic Federal University, Kaliningrad, Russia.
authors.forename: K A
authors.initials: KA
authors.lastname: Yurova
authors.affiliation: Kant Baltic Federal University, Kaliningrad, Russia.
authors.forename: N A
authors.initials: NA
authors.lastname: Sokhonevich
authors.affiliation: Kant Baltic Federal University, Kaliningrad, Russia.
authors.forename: O G
authors.initials: OG
authors.lastname: Khaziakhmatova
authors.affiliation: Kant Baltic Federal University, Kaliningrad, Russia.
authors.forename: L S
authors.initials: LS
authors.lastname: Litvinova
mesh_terms: D000328:Adult; D002454:Cell Differentiation / Q000235:genetics; D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D005786:Gene Expression Regulation; D006801:Humans; D007378:Interleukins / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D017493:Leukocyte Common Antigens / Q000378:metabolism; D008213:Lymphocyte Activation; D008297:Male; D009687:Nuclear Proteins / Q000235:genetics*; D011994:Recombinant Proteins / Q000235:genetics / Q000494:pharmacology; D012261:Ribonucleoproteins / Q000235:genetics*; D000072668:Splicing Factor U2AF; D013601:T-Lymphocytes / Q000166:cytology* / Q000187:drug effects / Q000502:physiology; D014157:Transcription Factors / Q000235:genetics*; D055815:Young Adult
chemical_list: D004268:DNA-Binding Proteins; C498275:GFI1 protein, human; D007378:Interleukins; D009687:Nuclear Proteins; D011994:Recombinant Proteins; D012261:Ribonucleoproteins; D000072668:Splicing Factor U2AF; D014157:Transcription Factors; C486290:U2AF1L4 protein, human; D017493:Leukocyte Common Antigens
keywords: T-cells; activation; alternative splicing; cytokines; gene expression