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• W2937351235 abstract "The chemokine CCL22 is predominantly produced by dendritic cells (DCs) and macrophages. CCL22 acts on CCR4-expressing cells including Th2 and Treg. Although a correlation between the CCL22-CCR4 axis and allergic diseases has been established, the mechanism of monocyte lineage-specific Ccl22 gene expression is largely unknown. In the current study, we investigated transcriptional regulation of the Ccl22 gene in DCs and macrophages. Using reporter assays, we identified the critical cis-enhancing elements at 21/-18 and -10/-4 in the Ccl22 promoter. Electrophoretic mobility shift assays proved that transcription factor PU.1 directly binds to the cis-elements. Knockdown of PU.1 markedly decreased Ccl22 expression in bone marrow-derived DCs (BMDCs) and BM macrophages (BMDMs). Chromatin immunoprecipitation assays revealed that PU.1 bound to the Ccl22 promoter in not only BMDCs and BMDMs, but also splenic DCs and peritoneal macrophages. LPS stimulation increased the amount of PU.1 recruited to the promoter, accompanied by upregulation of the Ccl22 mRNA level, which was diminished by Spi1 knockdown. We identified similar cis-elements on the human CCL22 promoter, which were bound with PU.1 in human monocytes. Taken together, these findings indicate that PU.1 transactivates the Ccl22 gene in DCs and macrophages by directly binding to the two elements in the promoter." @default.
• W2937351235 created "2019-04-25" @default.
• W2937351235 creator A5002089459 @default.
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• W2937351235 date "2019-02-04" @default.
• W2937351235 modified "2023-09-27" @default.
• W2937351235 title "A transcription factor PU.1 is critical for Ccl22 gene expression in dendritic cells and macrophages" @default.
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• W2937351235 doi "https://doi.org/10.1038/s41598-018-37894-9" @default.
• W2937351235 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6361964" @default.
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