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Journal ArticleDOI

MicroRNAs: the fine-tuners of Toll-like receptor signalling

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TLDR
MicroRNAs have emerged as important controllers of TLR signalling and are proving to be an important link between the innate and adaptive immune systems, and their dysregulation might have a role in the pathogenesis of inflammation.
Abstract
Toll-like receptors (TLRs) are central to the induction of pro-inflammatory responses, but their signalling pathways must be tightly regulated. As discussed in this article, an emerging level of fine-tuning is mediated by microRNAs, several of which are induced by TLR signalling. Toll-like receptor (TLR) signalling must be tightly regulated to avoid excessive inflammation and to allow for tissue repair and the return to homeostasis after infection and tissue injury. MicroRNAs (miRNAs) have emerged as important controllers of TLR signalling. Several miRNAs are induced by TLR activation in innate immune cells and these and other miRNAs target the 3′ untranslated regions of mRNAs encoding components of the TLR signalling system. miRNAs are also proving to be an important link between the innate and adaptive immune systems, and their dysregulation might have a role in the pathogenesis of inflammatory diseases.

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Citations
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Journal ArticleDOI

The STAT3-binding long noncoding RNA lnc-DC controls human dendritic cell differentiation.

TL;DR: A lncRNA expressed exclusively in human dendritic cells (DC), called lnc-DC, is identified that is required for optimal DC differentiation from human monocytes and that regulates DC activation of T cells.
Journal ArticleDOI

Toll-like Receptors and the Control of Immunity.

TL;DR: The mechanisms and consequences of TLR-mediated signal transduction are described with a focus on themes identified in the TLR pathways that also explain the operation of other immune signaling pathways.
Journal ArticleDOI

microRNA Regulation of Inflammatory Responses

TL;DR: Recent advances in the understanding of miRNAs and their connection to inflammatory responses are discussed, and the link between perturbations in miRNA levels and the onset of human inflammatory diseases is considered.
Journal ArticleDOI

Mechanisms of age-related macular degeneration

TL;DR: Insight is provided into the critical effector pathways mediating each form of the disease and a recurring theme that spans most aspects of AMD pathogenesis is defective immune modulation in the classically immune-privileged ocular haven.
Journal ArticleDOI

Diversity, Mechanisms, and Significance of Macrophage Plasticity

TL;DR: Macrophage plasticity, an essential component of chronic inflammation, and its involvement in diverse human diseases, most notably cancer, is discussed here as a paradigm.
References
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Journal ArticleDOI

Exosome-mediated transfer of mRNAs and microRNAs is a novel mechanism of genetic exchange between cells

TL;DR: It is shown that exosomes contain both mRNA and microRNA, which can be delivered to another cell, and can be functional in this new location, and it is proposed that this RNA is called “exosomal shuttle RNA” (esRNA).
Journal Article

MicroRNA signatures in human cancers

TL;DR: The causes of the widespread differential expression of miRNA genes in malignant compared with normal cells can be explained by the location of these genes in cancer-associated genomic regions, by epigenetic mechanisms and by alterations in the miRNA processing machinery as discussed by the authors.
Journal ArticleDOI

Identification of novel genes coding for small expressed RNAs.

TL;DR: It is shown that many 21- and 22-nt expressed RNAs, termed microRNAs, exist in invertebrates and vertebrates and that some of these novel RNAs are highly conserved, which suggests that sequence-specific, posttranscriptional regulatory mechanisms mediated by smallRNAs are more general than previously appreciated.
Journal ArticleDOI

MicroRNA genes are transcribed by RNA polymerase II.

TL;DR: The first direct evidence that miRNA genes are transcribed by RNA polymerase II (pol II) is presented and the detailed structure of a miRNA gene is described, for the first time, by determining the promoter and the terminator of mir‐23a∼27a‐24‐2.
Journal ArticleDOI

NF-κB-dependent induction of microRNA miR-146, an inhibitor targeted to signaling proteins of innate immune responses

TL;DR: A role is proposed for miR-146 in control of Toll-like receptor and cytokine signaling through a negative feedback regulation loop involving down-regulation of IL-1 receptor-associated kinase 1 and TNF receptor- associated factor 6 protein levels.
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