A rapid and scalable system for studying gene function in mice using conditional RNA interference.

Area of Science:

• Genetics
• Molecular Biology
• Biotechnology

Background:

• Reproducible generation of RNAi transgenic mice is crucial for gene function studies but remains a significant limitation.
• RNA interference (RNAi) offers a powerful approach for gene silencing.
• Existing methods for creating RNAi transgenic mice are often slow and not easily scalable.

Purpose of the Study:

• To develop a fast, scalable, and cost-effective pipeline for producing shRNA transgenic mice.
• To demonstrate the efficacy of the developed system for gene silencing in vivo.
• To identify potential therapeutic targets in cancer using RNAi technology.

Main Methods:

• Combined optimized fluorescence-coupled miR30-based shRNAs with high-efficiency ES cell targeting.
• Generated eight tet-regulated shRNA transgenic mouse lines targeting key genes (luciferases, Oct4, p53, p16INK4a, p19ARF, APC).
• Utilized GFP tracking for visualizing and quantifying gene knockdown in various tissues.

Main Results:

• Achieved potent gene silencing and GFP-tracked knockdown across a broad range of tissues in vivo.
• Demonstrated the system's ability to identify known and novel functions for genes, using APC as an example.
• Validated APC/Wnt and p19ARF as potential therapeutic targets in T-cell acute lymphoblastic leukemia/lymphoma and lung adenocarcinoma, respectively.

Conclusions:

• The developed pipeline provides a cost-effective and scalable platform for producing RNAi transgenic mice targeting any mammalian gene.
• This system significantly advances the study of gene function and facilitates the discovery of therapeutic targets.
• The technology holds promise for accelerating research in various fields, including cancer biology and drug development.