Send to

Choose Destination
J Vet Sci. 2018 May 31;19(3):434-445. doi: 10.4142/jvs.2018.19.3.434.

Production of transgenic pigs using a pGFAP-CreERT2/EGFP LoxP inducible system for central nervous system disease models.

Author information

Laboratory of Veterinary Embryology and Biotechnology, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, Cheongju 28644, Korea.
Department of Biotechnology, School of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea.


Transgenic (TG) pigs are important in biomedical research and are used in disease modeling, pharmaceutical toxicity testing, and regenerative medicine. In this study, we constructed two vector systems by using the promoter of the pig glial fibrillary acidic protein (pGFAP) gene, which is an astrocyte cell marker. We established donor TG fibroblasts with pGFAP-CreERT2/LCMV-EGFPLoxP and evaluated the effect of the transgenes on TG-somatic cell nuclear transfer (SCNT) embryo development. Cleavage rates were not significantly different between control and transgene-donor groups. Embryo transfer was performed thrice just before ovulation of the surrogate sows. One sow delivered 5 TG piglets at 115 days after pregnancy. Polymerase chain reaction (PCR) analysis with genomic DNA isolated from skin tissues of TG pigs revealed that all 5 TG pigs had the transgenes. EGFP expression in all organs tested was confirmed by immunofluorescence staining and PCR. Real-time PCR analysis showed that pGFAP promoter-driven Cre fused to the mutated human ligand-binding domain of the estrogen receptor (CreERT2) mRNA was highly expressed in the cerebrum. Semi-nested PCR analysis revealed that CreERT2-mediated recombination was induced in cerebrum and cerebellum but not in skin. Thus, we successfully generated a TG pig with a 4-hydroxytamoxifen (TM)-inducible pGFAP-CreERT2/EGFPLoxP recombination system via SCNT.


genetically modified animals; glial fibrillary acidic protein; nuclear transfer techniques; swine

[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for The Korean Society of Veterinary Science Icon for PubMed Central
Loading ...
Support Center