Tissue-specific genome editing in Ciona embryos by CRISPR/Cas9

Area of Science:

• * Molecular Biology
• * Developmental Biology
• * Genomics

Background:

• * The CRISPR/Cas9 system enables precise genetic modifications.
• * Understanding gene function in model organisms like Ciona intestinalis is crucial for biological research.

Purpose of the Study:

• * To utilize CRISPR/Cas9 for targeted gene disruption in Ciona intestinalis.
• * To investigate the function of the Ebf gene in embryonic development.

Main Methods:

• * Employed CRISPR/Cas9 technology to induce double-stranded breaks in the Ciona intestinalis genome.
• * Utilized electroporation for efficient delivery of CRISPR/Cas9 components.
• * Focused on tissue-specific disruption of the Ebf gene in synchronized embryos.

Main Results:

• * Successfully generated mutations in the Ebf gene in the F0 generation of Ciona embryos.
• * Demonstrated that Ebf is essential for the development of Islet-expressing motor ganglion neurons.
• * Showed Ebf's requirement for the formation of atrial siphon muscles.

Conclusions:

• * CRISPR/Cas9 is a highly effective and specific tool for rapid gene function screening in Ciona.
• * Endogenous Ebf is critical for specific neuronal and muscle cell fate during Ciona development.