The methods to generate transgenic animals and to control transgene expression

Area of Science:

• Biotechnology
• Genetics
• Animal Science

Background:

• Transgenic animals are established tools for gene function studies and disease modeling.
• Genome sequencing advancements have further validated the use of transgenic models.
• The potential for transgenic animals as bioreactors for pharmaceuticals is emerging.

Purpose of the Study:

• To review recent advancements in animal transgenesis techniques.
• To highlight improvements in generating transgenic models for research and production.
• To discuss emerging tools for gene manipulation and expression control.

Main Methods:

• Utilizing transposons, retroviruses, and sperm-mediated gene transfer for transgenic generation.
• Employing somatic cell nuclear transfer with gene-edited cells.
• Applying the Cre-LoxP system for targeted genomic modification.
• Leveraging improved tetracycline systems for controlled transgene expression.
• Developing RNA-based tools (siRNA, shRNA, ribozymes) and dominant-negative proteins for gene inhibition.

Main Results:

• Easier and more accessible generation of transgenic animals across various species.
• Enhanced precision in gene targeting and modification using systems like Cre-LoxP.
• Improved control over transgene expression through refined inducible systems.
• Development of novel tools for specific gene silencing in host or viral contexts.
• Increased feasibility of precise allele replacement in livestock for breeding improvement.

Conclusions:

• Recent technical innovations have significantly advanced animal transgenesis.
• These advancements provide more precise models for gene function and disease research.
• Transgenesis holds promise for revolutionizing pharmaceutical production and animal agriculture.