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Updated: Jan 23, 2026

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Genetic tools to study complexity of striatal function.

Chiara Ciriachi1, David Svane-Petersen1, Mattias Rickhag1

  • 1Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.

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Summary

Researchers explore the complex striatal circuit within the basal ganglia. New tools and techniques are crucial for understanding its function and developing treatments for basal ganglia diseases.

Keywords:
basal gangliagenetic approachesspiny projection neuronsstriatal heterogeneitystriatum

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Area of Science:

  • Neuroscience
  • Cellular Biology
  • Systems Neuroscience

Background:

  • The striatum is the primary input structure of the basal ganglia (BG), integrating information from various brain regions.
  • Medium-sized spiny neurons (MSNs) in the striatum form two distinct subpopulations: direct and indirect pathways.
  • These pathways interconnect BG nuclei, influencing motor control and other functions.

Purpose of the Study:

  • To review current understanding of the striatal circuit.
  • To present advanced techniques for deciphering its complexity.
  • To highlight the potential of new tools for understanding and treating BG diseases.

Main Methods:

  • Cell ablation
  • Optogenetics and chemogenetics
  • Tetanus toxin-induced neuronal silencing
  • Calcium imaging
  • Genetically encoded biosensors for neurotransmitter and signaling dynamics

Main Results:

  • Recent findings reveal transcriptional and functional diversity in spiny projection neurons (SPNs).
  • Regionally distinct signaling properties of SPNs are being uncovered.
  • Genetically encoded biosensors allow high-resolution monitoring of glutamate and dopamine signaling.

Conclusions:

  • Refined interrogation of SPN diversity is essential for a deeper understanding of the striatal circuit.
  • Mapping the G-protein-coupled receptor repertoire in SPNs could enable pathway-specific modulation.
  • Advanced tools are critical for developing next-generation treatments for basal ganglia diseases.