MicroRNA-9 Fine-Tunes Dendritic Cell Function by Suppressing Negative Regulators in a Cell-Type-Specific Manner.

Brendan Cordeiro, Peter Jeon, Giselle M Boukhaled, Mario Corrado, Orsolya Lapohos, Dominic G Roy, Kelsey Williams, Russell G Jones, Samantha Gruenheid, Selena M Sagan, Connie M Krawczyk

Cell reports 2020 May 05

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Dendritic cells, cells of the innate immune system, are found in a steady state poised to respond to activating stimuli. Once stimulated, they rapidly undergo dynamic changes in gene expression to adopt an activated phenotype capable of stimulating immune responses. We find that the microRNA miR-9 is upregulated in both bone marrow-derived DCs and conventional DC1s but not in conventional DC2s following stimulation. miR-9 expression in BMDCs and conventional DC1s promotes enhanced DC activation and function, including the ability to stimulate T cell activation and control tumor growth. We find that miR-9 regulated the expression of several negative regulators of transcription, including the transcriptional repressor Polycomb group factor 6 (Pcgf6). These findings demonstrate that miR-9 facilitates the transition of DCs from steady state to mature state by regulating the expression of several negative regulators of DC function in a cell-type-specific manner. Copyright © 2020 The Author(s). Published by Elsevier Inc. All rights reserved.

Citation

Brendan Cordeiro, Peter Jeon, Giselle M Boukhaled, Mario Corrado, Orsolya Lapohos, Dominic G Roy, Kelsey Williams, Russell G Jones, Samantha Gruenheid, Selena M Sagan, Connie M Krawczyk. MicroRNA-9 Fine-Tunes Dendritic Cell Function by Suppressing Negative Regulators in a Cell-Type-Specific Manner. Cell reports. 2020 May 05;31(5):107585