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Production of recombinant human proinsulin in the milk of transgenic mice

机译:转基因小鼠乳汁中重组人胰岛素原的产生

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摘要

There is a steady increasing demand for insulin worldwide. Current insulin manufacturing capacities can barely meet this increasing demand. The purpose of this study was to test the feasibility of producing human proinsulin in the milk of transgenic animals. Four lines of transgenic mice harboring a human insulin cDNA with expression driven by the goat β-casein gene promoter were generated. The expression level of human proinsulin in milk was as high as 8.1 g/L. The expression of the transgene was only detected in the mammary gland during lactation, with higher levels at mid-lactation and lower levels at early and late lactation. The blood glucose and insulin levels and the major milk compositions were unchanged, and the transgenic animals had no apparent health defects. The mature insulin derived from the milk proinsulin retained its biological activity. In conclusion, our study provides supporting evidence to explore the production of high levels of human proinsulin in the milk of dairy animals.
机译:全世界对胰岛素的需求稳定增长。当前的胰岛素生产能力几乎不能满足这种不断增长的需求。这项研究的目的是测试在转基因动物的牛奶中生产人胰岛素原的可行性。产生了四只含有人类胰岛素cDNA的转基因小鼠系,该表达具有由山羊β-酪蛋白基因启动子驱动的表达。牛奶中人胰岛素原的表达水平高达8.1μg/ L。仅在哺乳期间在乳腺中检测到转基因的表达,在哺乳中期具有较高的水平,在哺乳的早期和晚期具有较低的水平。血糖和胰岛素水平以及主要乳成分没有变化,转基因动物没有明显的健康缺陷。源自牛奶胰岛素原的成熟胰岛素保留了其生物学活性。总之,我们的研究提供了支持性证据,以探索奶牛动物乳汁中高水平的人胰岛素原的产生。

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