Flybow to Dissect Circuit Assembly in the Drosophila Brain: An Update

Area of Science:

• Neuroscience
• Developmental Biology
• Genetics

Background:

• Understanding neural circuit development requires visualizing individual cells and their lineages within complex environments.
• Stochastic labeling techniques are crucial for distinguishing and tracking cells in developmental studies.

Purpose of the Study:

• To provide a detailed protocol for using the Flybow system in Drosophila for multicolor cell labeling.
• To demonstrate the combination of Flybow with MARCM for generating multicolored wild-type or mutant clones.
• To outline sample preparation and imaging acquisition for confocal microscopy.

Main Methods:

• Utilizing Drosophila variants of the mouse Brainbow-2 system (Flybow) for stochastic labeling.
• Employing genetic strategies and heat shock for recombination induction.
• Combining Flybow with Mosaic Analysis with a Repressible Cell Marker (MARCM) for clonal analysis.
• Detailed protocols for sample preparation and multichannel confocal microscopy acquisition.

Main Results:

• Flybow enables stochastic labeling of individual cells or lineages with multiple fluorescent proteins.
• The combined Flybow-MARCM approach generates positively labeled wild-type or homozygous mutant clones in multiple colors.
• Protocols facilitate sample preparation and multichannel image acquisition for detailed visualization.

Conclusions:

• Flybow is a powerful tool for visualizing neural cell populations and lineages in Drosophila.
• The integration of Flybow with MARCM enhances clonal analysis capabilities.
• This chapter provides a comprehensive guide for researchers studying neural development using advanced imaging techniques.