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Characterizing RNA Modifications in Single Neurons Using Mass Spectrometry
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Rbm24 modulates neuronal RNA splicing to restrict cognitive dysfunction.

Dongbo Yao1, Xiaoxia Wang1, Jing Liu1

  • 1Institute of Stem Cell and Regenerative Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, Fujian 361000, China.

International Journal of Biological Macromolecules
|July 14, 2024
PubMed
Summary
This summary is machine-generated.

Reduced RNA-binding motif protein 24 (RBM24) impairs learning and memory by disrupting alternative splicing in neurons, offering new insights into Alzheimer's disease pathogenesis.

Keywords:
Alternative splicingCognitive impairmentRBM24

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Synaptic dysfunction is an early indicator of neurodegeneration and cognitive decline.
  • Neuronal alternative splicing (AS) generates unique proteins crucial for neuronal and synaptic function.
  • The role of splicing disruptions in neuronal pathogenesis of cognitive impairment remains largely unknown.

Purpose of the Study:

  • To investigate the role of RNA-binding motif protein 24 (RBM24) in cognitive function and Alzheimer's disease (AD).
  • To determine if RBM24 regulates alternative splicing of synapse-associated genes.
  • To elucidate the mechanisms by which RBM24 deficiency leads to cognitive impairment.

Main Methods:

  • Analysis of RBM24 expression in Alzheimer's disease patients.
  • Generation and analysis of conditional RBM24 knockout mice.
  • Electrophysiological recordings in hippocampal slices.
  • RNA sequencing and splicing analysis.

Main Results:

  • RBM24 expression is decreased in Alzheimer's disease patients.
  • Conditional brain-specific deletion of RBM24 in mice caused significant learning and memory deficits.
  • RBM24 deficiency led to impaired excitatory synaptic function and plasticity in hippocampal slices.
  • RBM24 regulates a network of cognition-related genes, including synapse-associated genes like GluR2 and Prrt1, through alternative splicing.

Conclusions:

  • RBM24 plays a critical role in maintaining normal synaptic function through the regulation of mRNA alternative splicing.
  • Disruption of RBM24-mediated splicing contributes to cognitive dysfunction and provides novel mechanistic insights into Alzheimer's disease pathogenesis.