Complex regulation of Ly-6E gene transcription in T cells by IFNs.
The complexity of IFN-mediated regulation of the murine Ly-6E gene in T cell lines is highlighted by the following observations: 1) multiple regulatory regions are present within different parts of the Ly-6E promoter and are necessary for IFN inducibility of the Ly-6E gene, 2) multiple transcription factors including Oct-1 and Oct-2 and the high mobility group (HMG) protein HMGI(Y) bind to regulatory elements present within the G region required for both IFN-alphabeta and IFN-gamma responses, 3) mutational analysis of the G region reveals that a complex interaction exists between the factors binding to this region as shown by their mutual interdependence for detection in DMSA, and 4) inhibition of expression of HMG proteins by antisense HMGI-C RNA in EL4 cells causes the loss of IFN-alphabeta and IFN-gamma inducibility of the endogenous Ly-6 gene. These findings taken together suggest that, in response to IFN treatment, an HMG protein-dependent complex involving multiple regulatory factors is assembled and is required for IFN inducibility of the Ly-6E gene.
Section of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.
M M
MM
Khodadoust
K D
KD
Khan
A L
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Bothwell
D000818:Animals; D000950:Antigens, Ly / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects / Q000276:immunology; D006609:High Mobility Group Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D007369:Interferon Inducers / Q000494:pharmacology; D007370:Interferon Type I / Q000494:pharmacology; D007371:Interferon-gamma / Q000494:pharmacology; D007372:Interferons / Q000494:pharmacology*; D008565:Membrane Proteins / Q000235:genetics*; D051379:Mice; D020218:Response Elements / Q000187:drug effects / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D014158:Transcription, Genetic / Q000187:drug effects / Q000276:immunology*; D014162:Transfection; D014407:Tumor Cells, Cultured
D000950:Antigens, Ly; D004268:DNA-Binding Proteins; D006609:High Mobility Group Proteins; D007369:Interferon Inducers; D007370:Interferon Type I; C074650:Ly6a protein, mouse; D008565:Membrane Proteins; D014157:Transcription Factors; D007371:Interferon-gamma; D007372:Interferons