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Establishment of a canine model of human type 2 diabetes mellitus by overexpressing phosphoenolypyruvate carboxykinase. | LitMetric

AI Article Synopsis

Article Abstract

Dogs are useful models for studying human metabolic diseases such as type 2 diabetes mellitus due to similarities in physiology, anatomy and life styles with humans. Somatic cell nuclear transfer (SCNT) facilitates the production of transgenic dogs. In this study, we generated transgenic dogs expressing the phosphoenolpyruvate carboxykinase (PEPCK) gene, which is closely involved in the pathogenesis of type 2 diabetes mellitus. In addition, we assessed the cloning efficiency associated with adult or fetal (cloned or natural mating) fibroblasts as a nuclear source. Cloning efficiency was determined by the fusion, pregnancy and cloning rates. The fusion rates were significantly high for fibroblasts from cloned fetuses, but the pregnancy and cloning rates were relatively high for cells from normal fetuses. Based on these data, fetal fibroblasts were selected as the nuclear donor for SCNT and genetically engineered to overexpress the PEPCK gene and dual selection marker genes controlled by the PEPCK promoter. The transgenic cells were introduced into oocytes and transferred into five recipient dogs, resulting in two pregnancies. Finally, three puppies were born and confirmed by microsatellite analysis to be genetically identical to the donor. One puppy successfully overexpressed PEPCK mRNA and protein in the liver. This canine disease model may be useful for studying the pathogenesis and/or therapeutic targets of type 2 diabetes mellitus.

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Source
http://dx.doi.org/10.3892/ijmm.2012.993DOI Listing

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