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Efficient Editing of the ZBED6-Binding Site in Intron 3 of IGF2 in a Bovine Model Using the CRISPR/Cas9 System. | LitMetric

AI Article Synopsis

Article Abstract

Background: Insulin-like growth factor 2 is a growth-promoting factor that plays an important role in the growth and development of mammals. A nucleotide substitution in intron 3 of -which disrupts the ZBED6-binding site-affects muscle mass, organ size, and fat deposition in pigs. The ZBED6-binding site is also conserved in cattle.

Methods: In the present study, we introduced mutations in the ZBED6-binding site in intron3 of in bovine fetal fibroblasts using the CRISPR/Cas9 system, and investigated the effect of disruption of ZBED6 binding on expression.

Results: Eleven biallelic-mutant single-cell clones were established, three of which contained no foreign DNA residues. Single-cell clones 93 and 135 were used to produce cloned embryos. Dual-luciferase reporter assay in C2C12 cells demonstrated that the mutation in the ZBED6-binding site increases the promoter 3 activity of bovine . A total of 49 mutant cloned embryos were transplanted into surrogate cows. Unfortunately, all cloned embryos died before birth. IGF2 was found to be hypomethylated in the only fetus born (stillborn), which may have been due to the incomplete reprogramming.

Conclusions: We efficiently constructed IGF2-edited cell lines and cloned embryos, which provided a theoretical basis and experimental materials for beef cattle breeding.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9325003PMC
http://dx.doi.org/10.3390/genes13071132DOI Listing

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