Inducing RNAi in C. elegans by feeding with dsRNA-expressing E. coli

Area of Science:

• Genetics and Molecular Biology
• Developmental Biology
• Biotechnology

Background:

• RNA interference (RNAi) is a powerful tool for studying gene function.
• Ingestion-mediated RNAi in Caenorhabditis elegans offers a high-throughput and accessible method.
• Engineered Escherichia coli strains are commonly used to deliver double-stranded RNA (dsRNA) for RNAi.

Purpose of the Study:

• To describe a widely adopted protocol for RNA interference (RNAi) in Caenorhabditis elegans using feeding.
• To present two variations of the RNAi-by-feeding method suitable for different life stages.
• To highlight the utility of this technique for probing C. elegans gene functions.

Main Methods:

• Utilizing engineered Escherichia coli expressing dsRNA to feed Caenorhabditis elegans.
• Implementing a liquid culture method for feeding L1 larvae to assess postembryonic development.
• Employing standard solid medium plates for feeding late larval or adult C. elegans.

Main Results:

• The described RNAi-by-feeding protocol is a productive and common approach in C. elegans research.
• Two distinct feeding variations allow for flexibility in targeting different developmental stages.
• This method facilitates the investigation of gene functions through RNA interference.

Conclusions:

• RNAi by feeding engineered E. coli is an effective and versatile strategy for C. elegans gene function studies.
• The protocol's adaptability to different life stages enhances its utility in genetic research.
• This technique remains a cornerstone for high-throughput functional genomics in C. elegans.