Sanders D S, Wilson C A, Bryant F J, Hopkins J, Johnson G D, Milne D M, Kerr M A
Department of Pathology, Medical School, University of Birmingham.
Gut. 1994 Aug;35(8):1022-5. doi: 10.1136/gut.35.8.1022.
Using a panel of carcinoembryonic antigen (CEA) related antibodies in normal oesophageal squamous mucosa CEA expression is present on suprabasal squames localised to the cell membrane. Immunoblotting shows that this positivity is predominantly due to a glycoprotein of around 180 kDa representing CEA itself. Positivity in squamous carcinomas is confined to cells in foci of squamous differentiation. A shift from membranous localisation to predominant cytoplasmic overexpression is shown between normal and malignant squames using confocal microscopy. The recognition of an adhesive role for CEA and a role in enhancing distant metastases in those tumours expressing CEA highlights the importance of recording CEA expression and changes in subcellular distribution between normal and malignant tissues; CEA expression in oesophageal squamous mucosa has not been well recognised previously and changes in expression may prove of great significance in the spread and dissemination of squamous carcinoma.
在正常食管鳞状黏膜中使用一组癌胚抗原(CEA)相关抗体,CEA表达存在于位于细胞膜的基底上层鳞状细胞中。免疫印迹显示,这种阳性主要归因于一种约180 kDa的糖蛋白,即CEA本身。鳞状细胞癌中的阳性仅限于鳞状分化灶中的细胞。使用共聚焦显微镜观察发现,正常和恶性鳞状细胞之间存在从膜定位到主要细胞质过表达的转变。认识到CEA的黏附作用以及在那些表达CEA的肿瘤中增强远处转移的作用,突出了记录CEA表达以及正常和恶性组织之间亚细胞分布变化的重要性;食管鳞状黏膜中的CEA表达以前未得到充分认识,表达变化可能在鳞状细胞癌的扩散和播散中具有重要意义。