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Establishment and characterisation of human carcinoembryonic antigen transgenic mice.

机译:人癌胚抗原转基因小鼠的建立和鉴定。

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摘要

We have produced human CEA transgenic mice which were found to express CEA mRNA in all tissues. By immunoblot analysis using anti-CEA polyclonal antibody, we also detected CEA protein in all tissues. However, the molecular size of CEA in the brain was different from that in other tissues, although the mRNA size was same and no deletion nor rearrangement was detected at the DNA level. Immunohistochemical analysis of the lung and the colon showed that the expression sites were the bronchial epithelial cells of the lung and the columnar epithelial cells of the colon. Interestingly, the expression of CEA protein in the transgenic mice was polarised to the luminal side of epithelial cells similar to the normal CEA expression in human tissues. We also detected cell surface expression of human CEA on thymocytes and spleen cells and CEA expression was greatly reduced by the phosphatidylinositol-specific phospholipase C (PI-PLC) treatment.
机译:我们已经生产了人类CEA转基因小鼠,发现在所有组织中均表达CEA mRNA。通过使用抗CEA多克隆抗体的免疫印迹分析,我们还在所有组织中检测到CEA蛋白。然而,尽管mRNA的大小相同,并且在DNA水平上未检测到缺失或重排,但大脑中CEA的分子大小却与其他组织不同。肺和结肠的免疫组织化学分析表明,表达部位是肺的支气管上皮细胞和结肠的柱状上皮细胞。有趣的是,转基因小鼠中CEA蛋白的表达被极化到上皮细胞的腔侧,类似于人组织中的正常CEA表达。我们还检测了人CEA在胸腺细胞和脾细胞上的细胞表面表达,并且通过磷脂酰肌醇特异性磷脂酶C(PI-PLC)处理大大降低了CEA表达。

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