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TRAP-seq Profiling and RNAi-Based Genetic Screens Identify Conserved Glial Genes Required for Adult Drosophila
Fanny S Ng1, Sukanya Sengupta1, Yanmei Huang1
1Department of Neuroscience, Sackler Program in Biomedical Sciences, Tufts University School of Medicine Boston, MA, USA.
Frontiers in Molecular Neuroscience
|January 10, 2017
Summary
Glial cells, particularly astrocytes, significantly influence brain functions like sleep and memory. This study identified key glial genes regulating fly behavior, highlighting glia-neuron communication
Area of Science:
- Neuroscience
- Cell Biology
- Genetics
Background:
- Glial cells, especially astrocytes, play crucial roles in brain development and function.
- Recent research highlights glial involvement in behavior, plasticity, sleep, circadian rhythms, and memory.
- Glia-neuron signaling is increasingly recognized as vital for modulating neural activity and behavior.
Purpose of the Study:
- To investigate the molecular mechanisms of glia-neuron signaling in regulating adult behavior.
- To identify specific glial genes and factors that influence behavior using Drosophila models.
- To compare molecular signatures of fly astrocyte-like cells with mammalian astrocytes and other glial types.
Main Methods:
- Conducted cell-specific, genome-wide expression profiling of adult Drosophila astrocyte-like brain cells.
- Performed RNA interference (RNAi)-based genetic screens targeting 318 genes for behavioral effects.
- Analyzed molecular signatures of fly astrocytes, mouse astrocytes, and fly surface glia.
Main Results:
- Identified 653 RNAi constructs in glial cells affecting locomotor activity, circadian rhythm, and mechanical stress response (bang sensitivity).
- Discovered that adult fly astrocyte-like cells share similar molecular signatures with mouse astrocytes.
- Found distinct expression profiles between fly astrocytes and surface glia, indicating cell-type specificity.
Conclusions:
- Glia-neuron communication is essential for regulating adult behaviors.
- Specific glial genes, including those encoding vesicle recycling factors, secreted proteins, and membrane transporters, are critical for behavior.
- Drosophila serves as a valuable model for studying conserved glial functions in behavior.
