Abstract
The high affinity IgE receptor, FcepsilonRI, is a key regulatory molecule in the allergic reaction. By screening for cis-acting elements over the entire region of the human FcepsilonRI beta-chain gene, a sequence located in the fourth intron was revealed to serve as a repressor element. This element was recognized by a transcription factor, myeloid zinc finger protein 1 (MZF-1). Introduction of MZF-1 antisense inhibited the suppressive effect of the element on the beta-chain promoter and increased the mRNA for the beta-chain in KU812 cells, indicating that MZF-1 repressed human FcepsilonRI beta-chain gene expression via the element in the fourth intron. Furthermore, it was suggested that a cofactor binding with MZF-1, whose expression level was different among the cell types, was required for transcriptional repression by MZF-1.
MeSH terms
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Cell Line, Tumor
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Chromosome Mapping
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DNA-Binding Proteins / genetics
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DNA-Binding Proteins / metabolism
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DNA-Binding Proteins / physiology
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Gene Expression Regulation / immunology*
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Humans
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Introns / immunology*
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Jurkat Cells
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K562 Cells
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Kruppel-Like Transcription Factors
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Lymphokines / genetics
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Oligonucleotides, Antisense / pharmacology
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Prostatic Secretory Proteins*
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Protein Binding / immunology
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Protein Subunits / biosynthesis*
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Protein Subunits / genetics*
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Protein Subunits / metabolism
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Receptors, IgE / biosynthesis*
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Receptors, IgE / genetics*
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Receptors, IgE / metabolism
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Regulatory Sequences, Nucleic Acid / immunology*
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Repressor Proteins / genetics
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Repressor Proteins / metabolism
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Repressor Proteins / physiology
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Transcription Factors / genetics
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Transcription Factors / metabolism
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Transcription Factors / physiology
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Up-Regulation / immunology
Substances
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DNA-Binding Proteins
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Kruppel-Like Transcription Factors
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Lymphokines
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MZF1 protein, human
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Oligonucleotides, Antisense
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Prostatic Secretory Proteins
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Protein Subunits
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Receptors, IgE
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Repressor Proteins
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Transcription Factors
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beta-microseminoprotein
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immunoglobulin-binding factors