Sequential transcriptional gates in the thalamo-cortical circuit coordinate memory stabilization
Biorxiv : the Preprint Server for Biology
|June 12, 2025
Summary
Scientists uncovered a molecular cascade in the brain that stabilizes memories over time. Specific genes act sequentially to maintain memories, explaining how we remember events for weeks and months.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Long-term memory persistence mechanisms remain unclear.
- Understanding memory consolidation and forgetting is crucial.
Purpose of the Study:
- Investigate molecular programs underlying memory persistence.
- Identify genetic regulators of memory stabilization over time.
Main Methods:
- Developed a behavioral task in mice to induce memory formation and forgetting.
- Monitored circuit-specific gene transcription in the thalamo-cortical circuit.
- Utilized CRISPR-knockout studies to assess gene function in memory stabilization.
Main Results:
- Identified distinct waves of gene transcription (cellular macrostates) in the thalamo-cortical circuit correlating with memory persistence.
- Discovered that specific transcriptional regulators orchestrate these molecular programs.
- Camta1, Tcf4, and Ash1l play causal, time-dependent roles in stabilizing memories over days to weeks.
Conclusions:
- A sequential transcriptional cascade involving Camta1, Tcf4, and Ash1l is critical for memory stabilization.
- Proposes a model where progressive recruitment of transcriptional programs enables long-term memory maintenance.
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