Highly efficient manipulation of nervous system gene expression with NEPTUNE

Area of Science:

• Neuroscience
• Developmental Biology
• Genetics

Background:

• Traditional methods for studying gene function in mice (knockout/knockin) are time-consuming.
• Rapid and flexible genetic manipulation is crucial for understanding nervous system development.

Purpose of the Study:

• To develop a novel technique for rapid genetic manipulation of the developing nervous system in mice.
• To assess the efficacy and applications of this new method for studying gene function.

Main Methods:

• NEPTUNE (NEural Plate Targeting by in Utero NanoinjEction) was developed to transduce the neural plate with virus before neurulation.
• Stable integration and conditional expression were achieved using cell-type-specific MiniPromoters.
• Gene knockdown (Olig2, Sptbn2) was performed to validate the technique.

Main Results:

• NEPTUNE demonstrated stable integration in >95% of brain cells, allowing long-term overexpression.
• Olig2 knockdown using NEPTUNE successfully recapitulated known Olig2 knockout phenotypes.
• Sptbn2 knockdown revealed previously unreported dose-dependent defects in neural tube development, embryonic turning, and abdominal wall closure.

Conclusions:

• NEPTUNE provides a rapid, cost-effective method for testing gene function in the developing mouse nervous system.
• The technique can uncover essential gene functions and reveal phenotypes incompatible with life.
• NEPTUNE facilitates the study of genetic disorders affecting the nervous system.