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Memory phase-specific genes in the Mushroom Bodies identified using CrebB-target DamID
Noemi Sgammeglia1, Yves F Widmer1, Jenifer C Kaldun1
1Department of Biology, University of Fribourg, Fribourg, Switzerland.
Plos Genetics
|June 12, 2023
Summary
Researchers identified genes downstream of CREB that regulate long-term memory (LTM) phases in fruit flies. This study used a targeted DamID approach to uncover novel genetic mechanisms essential for memory persistence.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Long-term memory (LTM) formation requires transcriptional changes and protein synthesis.
- The transcription factor CREB is a key regulator of LTM, but downstream genetic mechanisms remain poorly understood.
- Understanding these downstream pathways is crucial for defining different LTM phases.
Purpose of the Study:
- To investigate the downstream genetic mechanisms regulated by CREB in memory circuits.
- To identify genes involved in the formation and maintenance of long-term memory.
- To explore how these genes contribute to distinct phases of LTM.
Main Methods:
- Utilized a targeted DamID (TaDa) approach in Drosophila melanogaster.
- Generated a CREB-Dam fusion protein expressed in mushroom bodies (MBs).
- Performed RNA interference (RNAi) screening on differentially expressed genes identified by TaDa.
Main Results:
- Identified genes differentially expressed between paired and unpaired appetitive training paradigms.
- Discovered candidate genes that, upon RNAi, altered long-term memory.
- Uncovered novel genetic players acting downstream of CREB in olfactory memory.
Conclusions:
- The study elucidates downstream genetic pathways regulated by CREB in LTM.
- Identified specific genes that modulate LTM duration and stability.
- Provides new insights into the molecular basis of memory consolidation and persistence.
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