Control of Lineage-Specific Gene Expression by Functionalized gRNA Barcodes

Area of Science:

• Cell Biology
• Genetics
• Molecular Biology

Background:

• Lineage tracking is crucial for understanding dynamic cellular processes like tumor evolution and differentiation.
• Current high-diversity lineage quantitation methods use DNA barcode sequencing but lack individual lineage manipulation capabilities.

Purpose of the Study:

• To develop a functionalized lineage tracing tool enabling both high-diversity lineage tracking and lineage-specific gene expression manipulation.
• To introduce Control of Lineages by Barcode Enabled Recombinant Transcription (COLBERT) as a modular platform for advanced cellular studies.

Main Methods:

• Development of COLBERT, a system utilizing expressed barcode guide RNAs (gRNAs).
• The gRNAs serve a dual function: tracking cell lineages and directing lineage-specific gene expression.
• The platform is designed for modularity and high diversity applications.

Main Results:

• COLBERT enables simultaneous high-diversity lineage tracing and targeted gene expression control.
• The system effectively uses barcode gRNAs for both tracking and manipulation functions.
• Demonstrated the capability for precise, lineage-specific genetic interventions.

Conclusions:

• COLBERT provides a powerful new approach for studying complex cellular dynamics.
• This tool overcomes limitations of previous lineage tracing methods by enabling manipulation.
• COLBERT is expected to advance research in developmental biology, cancer evolution, and synthetic biology.