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Neural Circuits

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...

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Isolation and Expansion of Neurospheres from Postnatal (P1−3) Mouse Neurogenic Niches

Isolation and Expansion of Neurospheres from Postnatal (P1−3) Mouse Neurogenic Niches

Published on: May 23, 2020

Neural Circuits Serve as Periscopes for NSCs.

Nannan Guo¹, Amar Sahay²

¹Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.

|November 4, 2017

Summary

Local interneurons in the hippocampus control neural stem cell (NSC) fate. These interneurons relay signals from distant brain areas to regulate NSC quiescence and activation, impacting brain repair.

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Enumeration of Neural Stem Cells Using Clonal Assays

Enumeration of Neural Stem Cells Using Clonal Assays

Published on: October 4, 2016

Area of Science:

Neuroscience
Stem Cell Biology
Neurogenesis

Background:

Neural stem cells (NSCs) reside in specialized niches, like the hippocampus.
NSC fate decisions are influenced by local environmental cues.
Inhibitory interneurons are key components of hippocampal circuitry.

Purpose of the Study:

To investigate the role of hippocampal inhibitory interneurons in regulating neural stem cell behavior.
To elucidate the signaling pathways by which interneurons influence NSC quiescence and activation.

Main Methods:

Electrophysiological recordings to assess interneuron activity.
Calcium imaging to monitor NSC responses.
Genetic manipulation to control interneuron signaling.

Main Results:

Hippocampal interneurons modulate neural stem cell quiescence and activation.
Interneurons relay signals from distal brain regions to the NSC niche.
Specific interneuron activity patterns correlate with NSC fate decisions.

Conclusions:

Inhibitory interneurons act as critical conduits, integrating information from broader brain networks to control local neural stem cell fate.
This interneuron-mediated signaling is essential for maintaining the balance between neural stem cell quiescence and activation.