Brain-wide cellular resolution imaging of Cre transgenic zebrafish lines for functional circuit-mapping

Area of Science:

• Neuroscience
• Genetics
• Zebrafish Models

Background:

• Transgenic methods are crucial for studying nervous system connectivity but often lack specificity.
• Intersectional genetic strategies, like using Gal4 and Cre drivers, improve reporter expression targeting.

Purpose of the Study:

• To generate novel Cre lines for enhanced intersectional genetic targeting in zebrafish.
• To create a comprehensive, co-registered image database of transgenic zebrafish brain expression patterns.

Main Methods:

• Generation of over 50 new Cre transgenic zebrafish lines.
• Co-registration of brain expression images with the Zebrafish Brain Browser (zbbrowser.com).
• Development of a 3D spatial search tool for identifying specific neuronal populations.

Main Results:

• A collection of new Cre lines enabling precise intersectional targeting.
• An expanded cellular-resolution atlas of 264 transgenic lines with co-registered images.
• A functional web-browser for 3D spatial searching of neuronal expression patterns.

Conclusions:

• The new Cre lines and integrated database significantly advance intersectional genetic experiments in zebrafish.
• This resource facilitates precision circuit-mapping studies and understanding neural connectivity.
• The Zebrafish Brain Browser serves as a valuable tool for neuroscientists designing targeted genetic experiments.