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- W2979028045 abstract "Abstract Kawasaki disease (KD) is an acute systemic vasculitis and activation of monocytes plays a central role in the pathogenesis of it. B10 cells, a B cell subset with negative regulatory properties, are functionally identified by their ability to express cytoplasmic IL-10 after ex vivo stimulation. Here, we aimed to explore the functional role of B10 cells during monocyte-mediated inflammatory responses in KD, as well as elucidate the underlying microRNA (miRNA)-mediated regulatory mechanisms. Expression of IL-10 by each group of B cells (total B cells, transitional B cells, naïve B cells, and memory B cells) and inhibition of monocyte-derived TNF-α by activated B cells were measured by flow cytometry. Expression of miRNAs (miR-21-3p, miR-98-5p/3p, miR-27a-3p, let7b-5p, and miR-1423p/5p) that affect IL-10 levels in B cells was quantitated by real-time PCR. The relationship between IL-10 and these miRNAs was examined by multivariate analysis. MiR-mediated RNA interference in B cells was performed to investigate the role of miR-27a on expression of IL-10. The results showed expression of cytoplasmic IL-10 in B cell subsets from patients with KD was down-regulated. The inhibitory effect of B10 cells on production of TNF-α by monocytes from patients with KD was also compromised. The miR-27a-3p expression was markedly up-regulated during the acute phrase of KD, and it promoted monocyte-mediated TNF-α release by negatively regulating expression of cytoplasmic IL-10 within B cells in vitro. The data suggest up-regulated miR-27a in B cells from patients with KD may promote monocyte-mediated inflammatory responses by inhibiting the regulatory function of B10 cells." @default.
- W2979028045 created "2019-10-10" @default.
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- W2979028045 date "2019-10-03" @default.
- W2979028045 modified "2023-10-16" @default.
- W2979028045 title "Up-regulation of miR-27a promotes monocyte-mediated inflammatory responses in Kawasaki disease by inhibiting function of B10 cells" @default.
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- W2979028045 doi "https://doi.org/10.1002/jlb.5a0919-075rr" @default.
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