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Morphological Analysis of Drosophila Larval Peripheral Sensory Neuron Dendrites and Axons Using Genetic Mosaics
Published on: November 7, 2011
Turtle functions downstream of Cut in differentially regulating class specific dendrite morphogenesis in Drosophila
Mikolaj J Sulkowski1, Srividya Chandramouli Iyer, Mathieu S Kurosawa
1School of Systems Biology, George Mason University, Manassas, Virginia, United States of America.
Plos One
|August 4, 2011
Summary
The Drosophila gene Turtle differentially regulates dendritic branching in specific neuron subclasses. Turtle acts downstream of the Cut transcription factor, revealing a new pathway for class-specific dendrite development.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- Dendritic morphology is crucial for neuronal function and classification.
- Molecular mechanisms of dendrite development are complex, involving transcriptional, cytoskeletal, and cell surface interactions.
- Class-specific dendritic arbor specification remains poorly understood.
Purpose of the Study:
- Investigate the role of the Drosophila gene Turtle in neuronal development.
- Elucidate the molecular pathways regulating class-specific dendritic morphology.
- Define the relationship between Turtle and the Cut homeodomain transcription factor.
Main Methods:
- Differential gene expression analysis in Drosophila da neurons.
- Mosaic analysis with Repressible Cell Marker (MARCM) to study cell-autonomous effects.
- Transgenic overexpression of Turtle isoforms.
- Chromatin immunoprecipitation, qPCR, and immunohistochemistry.
- Genetic interaction studies.
Main Results:
- Turtle is differentially expressed in Drosophila da neurons and acts cell-autonomously.
- Turtle isoforms exhibit context-dependent, isoform-specific effects on dendritic branching in different da neuron subclasses.
- Turtle expression is positively regulated by the Cut homeodomain transcription factor.
- Turtle functions as a downstream effector of Cut-mediated regulation of dendritic morphology.
Conclusions:
- Turtle proteins play a differential role in establishing class-specific dendritic morphologies.
- A novel transcriptional regulatory pathway involving Cut and Turtle mediates class-specific dendrite development.
