| Autor: |
Alice Buonfiglioli, Ibrahim E. Efe, Dilansu Guneykaya, Andranik Ivanov, Yimin Huang, Elisabeth Orlowski, Christina Krüger, Rudolf A. Deisz, Darko Markovic, Charlotte Flüh, Andrew G. Newman, Ulf C. Schneider, Dieter Beule, Susanne A. Wolf, Omar Dzaye, David H. Gutmann, Marcus Semtner, Helmut Kettenmann, Seija Lehnardt |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Cell Reports, Vol 29, Iss 11, Pp 3460-3471.e7 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2211-1247 |
| DOI: |
10.1016/j.celrep.2019.11.029 |
| Popis: |
Summary: Microglia express Toll-like receptors (TLRs) that sense pathogen- and host-derived factors, including single-stranded RNA. In the brain, let-7 microRNA (miRNA) family members are abundantly expressed, and some have recently been shown to serve as TLR7 ligands. We investigated whether let-7 miRNA family members differentially control microglia biology in health and disease. We found that a subset of let-7 miRNA family members function as signaling molecules to induce microglial release of inflammatory cytokines, modulate antigen presentation, and attenuate cell migration in a TLR7-dependent manner. The capability of the let-7 miRNAs to control microglial function is sequence specific, mapping to a let-7 UUGU motif. In human and murine glioblastoma/glioma, let-7 miRNAs are differentially expressed and reduce murine GL261 glioma growth in the same sequence-specific fashion through microglial TLR7. Taken together, these data establish let-7 miRNAs as key TLR7 signaling activators that serve to regulate the diverse functions of microglia in health and glioma. : Buonfiglioli et al. elucidate the role of let-7 miRNAs acting as Toll-like receptor (TLR) ligands in the brain. Select let-7 miRNAs function as signaling molecules to modulate diverse microglial functions and glioma growth through TLR7. These data establish let-7 miRNAs as TLR7 signaling activators of microglia in health and glioma. Keywords: glioblastoma, lethal-7, microglia, microRNA, Toll-like receptor 7 |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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