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Related Experiment Video

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Transcriptomically-Guided Pharmacological Experiments in Neocortical and Hippocampal NPY-Positive GABAergic

Sanne Beerens1, Jochen Winterer2, David Lukacsovich2

  • 1Strathclyde Institute for Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, G4 0RE, United Kingdom.

Eneuro
|April 19, 2022
PubMed
Summary

Neuropeptide Y (NPY)-positive neurons differ between mouse auditory cortex and CA3 regions. Single-cell RNA sequencing revealed distinct gene expression, guiding targeted pharmacology for 5HT2a receptors in auditory NPY neurons.

Keywords:
5HT2aGABAergic interneuronNPYPatchSeqShisa9neurogliaform cells

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Cortical GABAergic interneurons are crucial for regulating neuronal activity.
  • Transcriptomic studies confirm diverse GABAergic interneuron classes.
  • Inter-regional differences in GABAergic interneuron subtypes are not well understood.

Purpose of the Study:

  • To investigate regional differences in neuropeptide Y (NPY)-positive GABAergic interneurons.
  • To characterize NPY-positive neurons in the auditory cortex (AC) and area CA3 using single-cell Patch-RNAseq.
  • To explore the functional implications of identified molecular differences.

Main Methods:

  • Single-cell Patch-RNA sequencing of NPY-positive GABAergic interneurons.
  • Comparative transcriptomic analysis between AC and CA3 regions.
  • Pharmacological experiments targeting 5HT2a receptors (5HT2aRs).

Main Results:

  • Over 300 genes showed differential expression in NPY-positive neurons between AC and CA3.
  • Shisa9/CKAMP44 and 5HT2aR were significantly upregulated in auditory NPY-positive neurons.
  • 5HT2aR antagonist ketanserin selectively reversed 5-hydroxytryptamine (5HT)-induced depolarization in auditory NPY-positive neurons.

Conclusions:

  • Single-cell transcriptomics can identify region-specific molecular profiles of neuronal subtypes.
  • Identified molecular differences, like 5HT2aR expression, can guide targeted pharmacological investigations.
  • NPY-positive neurons exhibit distinct regional characteristics and functional properties, particularly in the auditory cortex.