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Related Experiment Video

Updated: Jun 30, 2025

Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains
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Developmental trajectory of cortical somatostatin interneuron function.

Alex Wang1, Katie A Ferguson1, Jyoti Gupta1

  • 1Department of Neuroscience, Kavli Institute for Neuroscience, Wu Tsai Institute, Yale University School of Medicine, New Haven, CT 06510 USA.

Biorxiv : the Preprint Server for Biology
|March 18, 2024
PubMed
Summary
This summary is machine-generated.

Early in development, somatostatin-expressing interneurons (SST-INs) in the visual cortex gain feature selectivity. Their inhibitory impact on pyramidal neurons (PNs) strengthens, establishing a crucial circuit normalization mechanism.

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Area of Science:

  • Neuroscience
  • Developmental Biology

Background:

  • GABAergic inhibition is vital for neocortical circuit development, yet the roles of specific inhibitory interneuron subtypes are not fully understood.
  • Somatostatin-expressing interneurons (SST-INs) target dendrites of pyramidal neurons (PNs) in mature cortex, influencing synaptic integration and plasticity.

Approach:

  • This study investigated the early postnatal development of SST-INs and PNs in the mouse primary visual cortex.
  • Researchers analyzed the emergence of visual responses and feature selectivity in both neuron types.
  • The impact of SST-INs on PN visual responses was assessed across different developmental stages.

Key Points:

  • Pyramidal neurons (PNs) showed stable visual responses and feature selectivity from eye opening.
  • Somatostatin-expressing interneurons (SST-INs) developed visual responses and feature selectivity during the third postnatal week.
  • SST-INs increasingly exerted a multiplicative inhibitory effect on PN visual responses over time.

Conclusions:

  • A developmental window exists for the emergence of inhibitory circuit mechanisms for normalization.
  • Early visual cortex development involves the maturation of SST-INs and their integration into local circuits.
  • This study clarifies the developmental trajectory of SST-INs and their contribution to cortical circuit function.