Multibow: digital spectral barcodes for cell tracing.

Area of Science:

• Developmental Biology
• Regenerative Medicine
• Molecular Biology

Background:

• Traditional cell tracing methods like Brainbow rely on differential fluorescent protein expression.
• Existing techniques may lack sufficient diversity for complex lineage tracing.

Purpose of the Study:

• To introduce Multibow, an advanced multicolor labeling strategy for enhanced cell tracing.
• To increase label diversity and enable robust tracking of cell lineages.

Main Methods:

• Developed a library of constructs with seven colors and three subcellular localizations.
• Utilized Cre recombination to probabilistically activate reporters, creating unique binary codes.
• Combined constructs to generate cells with multiple, independently expressed colors.

Main Results:

• Multibow generates unique "barcodes" for individual cells and their clonal progenies.
• The system allows tracking beyond expression level differences, incorporating combinatorial labeling.
• Validated the Multibow strategy in zebrafish, demonstrating its feasibility.

Conclusions:

• Multibow offers a powerful new tool for cell tracing in developmental and regenerative studies.
• The binary coding approach significantly enhances label diversity and tracking capabilities.
• This strategy holds promise for advancing our understanding of complex biological processes.