Biliary glycoprotein, a potential human cell adhesion molecule, is down-regulated in colorectal carcinomas.

• M Neumaier

  Abteilung für Klinische Chemie, Universitätskrankenhaus Eppendorf, Hamburg, Germany.

• S Paululat

  Abteilung für Klinische Chemie, Universitätskrankenhaus Eppendorf, Hamburg, Germany.

• A Chan

  Abteilung für Klinische Chemie, Universitätskrankenhaus Eppendorf, Hamburg, Germany.

• P Matthaes

  Abteilung für Klinische Chemie, Universitätskrankenhaus Eppendorf, Hamburg, Germany.

• C Wagener

  Abteilung für Klinische Chemie, Universitätskrankenhaus Eppendorf, Hamburg, Germany.

抄録

Biliary glycoprotein (BGP) is the human homologue of a cell adhesion molecule (CAM) of the rat designated Cell-CAM. The BGP gene is a member of the carcinoembryonic antigen gene family, which belongs to the immunoglobulin superfamily. BGP is expressed in cells of epithelial and myeloid origin. In granulocytes, BGP is a main antigen of the CD66 cluster of differentiation antigens that mediate the binding to endothelial E-selectin. Since BGP is a major human CAM, the expression of BGP was studied in 21 colorectal carcinoma tissue specimens and in the respective adjacent normal mucosae. As an internal control for epithelial mRNA, the expression of cytokeratin 18 was evaluated in parallel. In addition, the expression of carcinoembryonic antigen and nonspecific crossreacting antigen, which are highly homologous to BGP, was investigated. Two BGP mRNAs of 3.9 and 1.5 kilobases were detected in the normal colonic mucosa samples. The median of the tumor-to-normal ratios of mRNA expression was 0.2 for both BGP mRNAs. In contrast, the median was 1.2 for cytokeratin, 1.0 for carcinoembryonic antigen, and 1.4 for nonspecific crossreacting antigen. Relative to cytokeratin 18 expression, the expression of BGP was reduced to < or = 0.1 in half of the tumors and to < or = 0.4 in > 80% of the tumors. These findings indicate that the loss or reduced expression of the adhesion molecule BGP is a major event in colorectal carcinogenesis.

収録刊行物

• Proceedings of the National Academy of Sciences

  Proceedings of the National Academy of Sciences 90 (22), 10744-10748, 1993-11-15

  Proceedings of the National Academy of Sciences

キーワード

• Multidisciplinary

詳細情報

• CRID: 1362825895843959296
• NII論文ID: 30016295351
• DOI: 10.1073/pnas.90.22.10744
• ISSN: 10916490
• ISSN: 00278424
• Web Site: https://pnas.org/doi/pdf/10.1073/pnas.90.22.10744
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