Scientific article
OA Policy
English

MicroRNA-92a-CPEB3 axis protects neurons against inflammatory neurodegeneration

Published inScience advances, vol. 9, no. 47, eadi6855
Publication date2023-11-24
First online date2023-11-24
Abstract

Neuroinflammation causes neuronal injury in multiple sclerosis (MS) and other neurological diseases. MicroRNAs (miRNAs) are important modulators of neuronal stress responses, but knowledge about their contribution to neuronal protection or damage during inflammation is limited. Here, we constructed a regulatory miRNA-mRNA network of inflamed motor neurons by leveraging cell type-specific miRNA and mRNA sequencing of mice undergoing experimental autoimmune encephalomyelitis (EAE). We found robust induction of miR-92a in inflamed spinal cord neurons and identified cytoplasmic polyadenylation element-binding protein 3 (Cpeb3) as a key target of miR-92a-mediated posttranscriptional silencing. We detected CPEB3 repression in inflamed neurons in murine EAE and human MS. Moreover, both miR-92a delivery andCpeb3deletion protected neuronal cultures against excitotoxicity. Supporting a detrimental effect ofCpeb3in vivo, neuron-specific deletion in conditionalCpeb3knockout animals led to reduced inflammation-induced clinical disability in EAE. Together, we identified a neuroprotective miR-92a-Cpeb3axis in neuroinflammation that might serve as potential treatment target to limit inflammation-induced neuronal damage.

Keywords
  • Humans
  • Mice
  • Animals
  • MicroRNAs / genetics
  • MicroRNAs / metabolism
  • Neuroinflammatory Diseases
  • Encephalomyelitis, Autoimmune, Experimental / genetics
  • Encephalomyelitis, Autoimmune, Experimental / metabolism
  • Multiple Sclerosis
  • Inflammation / genetics
  • Inflammation / metabolism
  • Neurons / metabolism
  • RNA, Messenger / metabolism
  • Mice, Inbred C57BL
  • RNA-Binding Proteins / genetics
  • RNA-Binding Proteins / metabolism
Citation (ISO format)
WINKLER, Iris et al. MicroRNA-92a-CPEB3 axis protects neurons against inflammatory neurodegeneration. In: Science advances, 2023, vol. 9, n° 47, p. eadi6855. doi: 10.1126/sciadv.adi6855
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Identifiers
ISSN of the journal2375-2548
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Creation12/04/2023 2:43:44 PM
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