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Novel Object Recognition Test for the Investigation of Learning and Memory in Mice
Published on: August 30, 2017
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Mouse hippocampal CA1 VIP interneurons detect novelty in the environment and support recognition memory
Suhel Tamboli1, Sanjay Singh1, Dimitry Topolnik1
1Neuroscience Axis, CRCHUQ-CHUL, Quebec City, PQ, Canada; Department of Biochemistry, Microbiology, and Bioinformatics, Université Laval, Quebec City, PQ, Canada.
Cell Reports
|April 12, 2024
Summary
Vasoactive intestinal polypeptide-expressing interneurons (VIP-INs) in the hippocampus become active during spatial exploration of new environments. This VIP-IN activity facilitates rapid learning and memory formation by disinhibiting neural circuits.
Area of Science:
- Neuroscience
- Cellular Neuroscience
- Systems Neuroscience
Background:
- Vasoactive intestinal polypeptide-expressing interneurons (VIP-INs) are key components of disinhibitory circuits in the CA1 hippocampus.
- The precise behavioral triggers for VIP-IN-mediated circuit disinhibition are not fully understood.
Purpose of the Study:
- To investigate the role of VIP-INs in hippocampal function during specific behavioral conditions.
- To determine the behavioral relevance of VIP-IN activity and circuit disinhibition in freely behaving mice.
Main Methods:
- Utilized wireless technologies for real-time monitoring and manipulation of VIP-IN activity in freely behaving mice.
- Recorded neuronal activity in the CA1 hippocampus during spatial exploration and novel environmental changes.
Main Results:
- VIP-INs in the CA1 hippocampus show heightened activity during exploration of novel environments.
- Increased activity of VIP-INs and pyramidal neurons (PNs) was observed upon encountering contextual and object novelty.
- Somatostatin- and parvalbumin-expressing inhibitory neurons exhibited decreased activity, indicating circuit disinhibition on a second timescale.
Conclusions:
- VIP-IN-mediated disinhibition is crucial for the rapid encoding of novel spatial information.
- This mechanism plays a significant role in recognition memory acquisition and adapting to environmental changes.
Keywords:
CP: Neuroscience
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