MicroRNA Regulation in Neurodegenerative Disease Mechanisms

MicroRNAs are small non-coding RNA molecules that regulate gene expression post-transcriptionally by guiding the RNA-induced silencing complex to target messenger RNAs. In neurodegenerative disorders such as Alzheimer’s and Parkinson’s diseases, perturbations in microRNA networks contribute to aberrant protein aggregation, neuroinflammation and synaptic dysfunction. Specific microRNAs modulate key pathogenic pathways, including amyloid precursor processing, Tau phosphorylation and microglial activation, thereby influencing neuronal survival and cognitive decline. Dysregulated microRNA signatures have been detected in brain tissue, cerebrospinal fluid and peripheral biofluids, highlighting their value as both mechanistic probes and potential biomarkers. Advances in high-throughput profiling and functional screening have begun to unveil networks of microRNAs that orchestrate cellular senescence, mitochondrial homeostasis and axonal integrity. Together, these insights underscore the global significance of microRNA regulation for understanding disease heterogeneity and for developing both diagnostic assays and precision therapies aimed at restoring RNA-mediated control in the degenerating nervous system.

Research from Nature Portfolio

Recent studies have employed high-throughput small-molecule screening in human induced pluripotent stem cell-derived neurons to map compound-mediated modulation of hundreds of microRNAs. This approach identified cardiac glycosides as potent inducers of a neuroprotective microRNA that downregulates pathological Tau and shields neurons from diverse toxic insults. The resulting dataset of drug-like compounds and their effects on the neuronal microRNome provides a valuable resource for miRNA-based drug discovery and paves the way for novel therapeutic strategies targeting regulatory RNAs.

MicroRNA Regulation in Neurodegenerative Disease Mechanisms publication trend

The graph below shows the total number of articles in microrna regulation in neurodegenerative disease mechanisms across all publications each year (not limited to Nature Index journals).

Technical terms

microRNA: A ∼22-nucleotide non-coding RNA that regulates gene expression by guiding silencing complexes to target mRNAs.

Induced pluripotent stem cell (iPSC): A reprogrammed somatic cell capable of differentiating into various cell types, used here to generate human neurons for screening.

Amyloid-β: A peptide fragment that aggregates into plaques in Alzheimer’s disease, contributing to neuronal toxicity.

Synaptic pruning: The process by which microglia remove excess or weakened synapses, crucial for neural circuit refinement but potentially deleterious if dysregulated.

References

1. Small molecule regulators of microRNAs identified by high-throughput screen coupled with high-throughput sequencing. Nature Communications (2023).
2. Decreased miR-451a in cerebrospinal fluid, a marker for both cognitive impairment and depressive symptoms in Alzheimer's disease. Theranostics (2023).
3. Effects of brain microRNAs in cognitive trajectory and Alzheimer’s disease. Acta Neuropathologica (2024).
4. Microglia specific deletion of miR-155 in Alzheimer’s disease mouse models reduces amyloid-β pathology but causes hyperexcitability and seizures. Journal of Neuroinflammation (2023).