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Differential impact of Dicer deficiency on microglia of the developing and adult brain

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus

PROVIDER: GSE98144 | GEO | 2017/06/20

SECONDARY ACCESSION(S): PRJNA384119

REPOSITORIES: GEO

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Differential impact of Dicer deficiency on microglia of the developing and adult brain (Agilent miRNA microarrays)

Project description:Microglia seed the embryonic neuro-epithelium, expand and actively sculpt neuronal circuits in the developing CNS, but eventually adopt relative quiescence and ramified morphology in the adult. Here we probed the impact of post-transcriptional control by microRNAs (miRNAs) on microglial performance during development and adulthood by generating mice lacking microglial dicer expression at these distinct stages. RNA seq of conditional dicer ablation in adult microglia revealed that miRNAs were required to limit microglial responses to challenge but had only minor changes on non-challenged microglia. Specifically, following peripheral endotoxin exposure of the animals (LPS), Dicer-deficient microglia either from total brain or hippocampus overexpressed pro-inflammatory cytokines and as a result compromised hippocampal neuronal functions. In contrast, prenatal ablation resulted in spontaneous microglia activation and revealed Dicer involvement in DNA repair and preservation of genome integrity. Overall, our study shows miRNA and Dicer regulation of inflammatory response either following challenge in the adult or spontaneously in the newborn microglia. Moreover, Dicer is required for preservation of microglia DNA integrity required for their proliferation, longevity and radioresistance.

2017-06-20 | GSE98143 | GEO

Differential impact of Dicer deficiency on microglia of the developing and adult brain (Bulk RNA-Seq)

2017-06-20 | GSE98142 | GEO

Differential impact of Dicer deficiency on microglia of the developing and adult brain

Project description:Differential impact of Dicer deficiency on microglia of the developing and adult brain

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Dicer deficiency reveals microRNAs predicted to control gene expression in developing adrenal cortex

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2013-05-01 | E-GEOD-45812 | biostudies-arrayexpress

Dicer deficiency reveals microRNAs predicted to control gene expression in developing adrenal cortex