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Journal Article
Research Support, Non-U.S. Gov't
Site-directed mutagenesis of the myostatin gene in ovine fetal myoblast cells in vitro.
Research in Veterinary Science 2012 October
Myostatin is an important negative regulator of muscle growth and development. Natural mutations of the myostatin gene cause a double muscling phenotype in beef cattle, pigs and sheep. Therefore, it is feasible to produce a high growth domestic breed by generating a transgenic animal with a mutation, deletion or knockout of the myostatin gene. Our objective was to introduce a subtle mutation of G to A 281-bp upstream of the 3' untranslated region (3'UTR) end of the myostatin gene in Poll Dorset fetal myoblast cells in vitro. Fetal myoblast cells were isolated from fetuses at day 50 of gestation from Poll Dorset sheep and transfected with linear gene-targeting vector pMSTN-A using electroporation. We obtained seven gene-targeted cell colonies with homologous recombination, which were positive as confirmed by PCR, Southern blot. The Western blot analysis result demonstrated that the myostatin protein expression in positive colonies is lower than that of negative ones. These results strongly suggest that we successfully mutated the myostatin gene of Poll Dorset ovine fetal myoblast cells and the mutation can effectively downregulate the myostatin protein expression.
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