Agouti C57BL/6N embryonic stem cells for mouse genetic resources

Area of Science:

• Genetics
• Developmental Biology
• Stem Cell Biology

Background:

• Mouse embryonic stem cells (ESCs) are crucial for genetic engineering.
• The C57BL/6N strain is a standard genetic background for mouse models.
• Existing ESC lines may have limitations in breeding schemes.

Purpose of the Study:

• To characterize the germline competence of the JM8 mouse ESC line.
• To modify JM8 cells for simplified breeding by restoring the agouti coat color gene.
• To establish a resource for large-scale mouse knockout programs.

Main Methods:

• Characterization of germline transmission in JM8 ESCs.
• Targeted gene repair to restore the agouti locus in JM8 cells.
• Assessment of breeding efficiency with modified JM8 cells.

Main Results:

• JM8 ESCs demonstrated high germline competence.
• Targeted repair successfully restored the dominant agouti gene in JM8 cells.
• The modified JM8 line facilitates simplified breeding strategies.

Conclusions:

• The characterized JM8 ESC line is suitable for germline transmission.
• Agouti gene restoration in JM8 cells enhances their utility for mouse genetics.
• These modified ESCs provide a valuable resource for C57BL/6N knockout mouse generation.