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- W2407030510 abstract "Genes coding for CD66a (biliary glycoprotein), carcinoembryonic antigen (CEA) group member 2 (CGM2), and nonspecific cross-reacting antigen (NCA) are members of the human CEA gene subgroup. We investigated a series of 11 colorectal carcinomas by Northern blot and isotopic in situ hybridization (ISH), demonstrating underexpression of CD66a and CGM2 in the majority of the carcinomas as compared with the normal mucosa, whereas NCA was overexpressed. ISH for CD66a and CGM2 mRNA revealed that large areas of the carcinomas remained without or with only faint hybridization signals. However, in every carcinoma, at least some positive foci were observed, indicating remaining cell populations that actively transcribe CD66a and CGM2. In contrast, ISH for NCA displayed strong and extensive autoradiographic signals. By analysis of step sections, foci of CD66a and CGM2 expression were shown to co-localize. Furthermore, these foci contained relatively few nuclei immunohistochemically positive for the proliferation-associated nuclear antigen Ki-67. Our data indicate a dysregulation of the three genes possibly with a common transcriptional control for CD66a and CGM2 and a different control for NCA. The focal expression of CD66a and CGM2 could be interpreted as due to a focal, incomplete, and abortive differentiation or, alternatively, as a consequence of genetic heterogeneity with foci of slow-proliferating subclones." @default.
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- W2407030510 date "1997-08-01" @default.
- W2407030510 modified "2023-09-23" @default.
- W2407030510 title "Dysregulation of carcinoembryonic antigen group members CGM2, CD66a (biliary glycoprotein), and nonspecific cross-reacting antigen in colorectal carcinomas. Comparative analysis by northern blot and in situ hybridization." @default.
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