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- W2168590981 abstract "Abstract Micro-RNAs (miRNAs) are small noncoding RNAs that regulate various biological pathways. As their role in phagocytosis remains poorly understood, we investigated their impact on phagocytosis in myeloid inflammatory cells. Seven miRNAs (miR-24, -30b, -101, 142-3p, -652-3p, -652-5p, and -1275) that were differentially expressed during monocyte to macrophage (Mφ) and monocyte to dendritic cell (DC) differentiation were screened for their potential role in phagocytosis. Among these, overexpression of miR-24, miR-30b, and miR-142-3p in human monocyte-derived Mφ, DC, monocytes, and PBMCs significantly attenuate phagocytosis of Escherichia coli and Staphylococcus aureus, as well as the secretion of inflammatory mediators, including TNF-α, IL-6, and IL-12p40. miRNA-mediated changes in cytokine profiles were observed at transcriptional and/or posttranscriptional levels and importantly exhibit miRNA-specific impact. To examine the underlying mechanism, we monitored the expression of phagocytosis pathway-associated genes and identified several genes that were altered in Mφ and DC transfected with miR-24, miR-30b, and miR-142-3p mimics. Some of these genes with altered expression also harbor putative miRNA binding sites. We show that miR-142-3p directly regulates protein kinase Cα (PKCα), a key gene involved in phagocytosis. Interestingly, miR-142-3p and PKCα exhibit antagonistic expression during Mφ and DC differentiation. Short interfering RNA-mediated knockdown of PKCα in Mφ leads to reduced bacterial uptake, further highlighting the role of the gene in phagocytosis. Overall, these results demonstrate that miR-24, miR-30b, and miR-142-3p regulate phagocytosis and associated cytokine production in myeloid inflammatory cells through modulation of various genes involved in the pathway." @default.
- W2168590981 created "2016-06-24" @default.
- W2168590981 creator A5014412096 @default.
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- W2168590981 date "2015-02-15" @default.
- W2168590981 modified "2023-10-14" @default.
- W2168590981 title "miR-24, miR-30b, and miR-142-3p Regulate Phagocytosis in Myeloid Inflammatory Cells" @default.
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- W2168590981 doi "https://doi.org/10.4049/jimmunol.1401893" @default.
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