Hyperactive self-inactivating piggyBac for transposase-enhanced pronuclear microinjection transgenesis

Area of Science:

• Molecular Biology
• Genetics
• Developmental Biology

Background:

• Mouse transgenesis is crucial for studying gene function and disease modeling.
• Conventional methods like pronuclear microinjection (PNI) and intracytoplasmic sperm injection (ICSI) have limitations in efficiency and embryo usage.
• Improving transgenesis techniques is essential for accelerating genetic research.

Purpose of the Study:

• To develop and validate a novel, highly efficient method for mouse transgenesis.
• To enhance transgene integration efficiency using a transposase-mediated approach.
• To reduce the number of embryos required for generating transgenic mice.

Main Methods:

• Development of a transposase-enhanced pronuclear microinjection (PNI) technique.
• Utilizing the hyperactive piggyBac transposase for large transgene insertion into the mouse genome.
• Comparison of the new method with conventional PNI and ICSI-mediated transgenesis.

Main Results:

• The transposase-enhanced PNI technique demonstrated a fivefold increase in transgene integration efficiency compared to conventional methods.
• Fewer embryos required microinjection using the enhanced PNI technique to achieve transgenic animals.
• The method proved efficient for single-cell embryo cytoplasmic injections.

Conclusions:

• The transposase-enhanced PNI technique offers a significantly more efficient and embryo-sparing approach to mouse transgenesis.
• This method provides an easily implementable and powerful tool for the scientific community.
• The use of piggyBac transposase represents a substantial advancement in generating genetically modified mice.