Copy and paste: Humanizing IgH 155 kb at a time

Area of Science:

• Immunology
• Genetics
• Biotechnology

Background:

• Generating mice that express human antibodies is crucial for antibody research and drug development.
• Current methods for creating humanized antibody mice are time-consuming and labor-intensive.
• The feasibility of inserting large human gene segments into mouse zygotes remains a challenge.

Purpose of the Study:

• To investigate the feasibility of inserting large human gene segments into mouse zygotes.
• To develop a faster method for generating functional humanized antibody mice.
• To overcome the limitations of existing techniques for antibody research models.

Main Methods:

• Utilized CRISPR-mediated homology-directed repair to insert a 155-kb human V_H locus into mouse zygotes.
• Employed advanced gene editing techniques for precise genetic modification.
• Generated genetically modified mouse embryos for subsequent development.

Main Results:

• Successfully inserted the large 155-kb human V_H locus into mouse zygotes.
• Generated functional humanized antibody mice.
• Significantly reduced the generation time from years to weeks.

Conclusions:

• CRISPR-mediated insertion of large human gene segments is feasible and efficient.
• This method provides a rapid and effective way to generate humanized antibody mice.
• The study accelerates the development of novel antibody therapeutics and research tools.