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Targeted gene knockout in chickens mediated by TALENs
Tae Sub Park1, Hong Jo Lee2, Ki Hyun Kim2
1Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea; Institute of Green-Bio Science and Technology, Seoul National University, Pyeongchang-gun, Gangwon-do 232-916, Korea; and.
Researchers created gene knockout chickens using TALEN technology to disable the ovalbumin (OV) gene in primordial germ cells. This efficient method enables the safe development of genome-edited chickens for practical applications and research.
Area of Science:
- Genetics and Genomics
- Animal Biotechnology
- Molecular Biology
Background:
- Genetically modified animals are crucial for industrial applications and scientific research, aiding in understanding biological mechanisms.
- Conventional homologous recombination for gene targeting in animals is inefficient and technically challenging.
Purpose of the Study:
- To develop an efficient and safe method for creating specific gene knockout chickens.
- To utilize transcription activator-like effector nuclease (TALEN) technology for precise genome editing in chickens.
Main Methods:
- Targeted knockout of the ovalbumin (OV) gene was performed in chicken primordial germ cells using TALEN-mediated gene targeting.
- OV gene mutant offspring were generated and identified through test-cross analysis.
- TALENs were employed to induce nucleotide deletion mutations, causing frameshifts and loss of gene function.
Main Results:
- Successful targeted knockout of the ovalbumin (OV) gene in chicken primordial germ cells.
- Generation of OV gene mutant chickens confirmed via test-cross analysis.
- TALENs effectively induced mutations leading to the loss of OV gene function.
Conclusions:
- TALEN-mediated gene targeting in chicken primordial germ cells is a powerful and safe strategy for genome editing.
- This technique facilitates the creation of specifically genome-edited chickens for practical applications and scientific research.
- The study demonstrates the potential of TALENs for advancing chicken biotechnology.
