Expression of the C-erbB-3 protein in gastrointestinal tract tumours determined by monoclonal antibody RTJ1
| Autor: | T, Rajkumar, C S, Gooden, N R, Lemoine, W J, Gullick, C S, Goden |
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| Rok vydání: | 1993 |
| Předmět: |
Pathology
medicine.medical_specialty Esophageal Neoplasms Receptor ErbB-3 medicine.drug_class Immunoprecipitation Adenocarcinoma Biology Monoclonal antibody Pathology and Forensic Medicine Mice Antibody Specificity Stomach Neoplasms Proto-Oncogene Proteins medicine Animals Humans Gastrointestinal Neoplasms Mice Inbred BALB C Gastrointestinal tract Antibodies Monoclonal Epithelium Staining ErbB Receptors Blot medicine.anatomical_structure Head and Neck Neoplasms Polyclonal antibodies Colonic Neoplasms Carcinoma Squamous Cell biology.protein Female Antibody |
| Zdroj: | The Journal of Pathology. 170:271-278 |
| ISSN: | 1096-9896 0022-3417 |
| DOI: | 10.1002/path.1711700309 |
| Popis: | We have examined the expression of the c-erbB-3 protein in a wide range of tumours of the gastrointestinal (GI) tract using immunocytochemical staining. Two antibodies were employed, a polyclonal antibody, 49.3, and a new monoclonal antibody, RTJ1, both raised to a synthetic peptide from the cytoplasmic domain of the human c-erbB-3 protein. The antibodies recognize c-erbB-3 by immunoprecipitation and Western blotting of lysate prepared from a cell line engineered to overexpress the protein. Both antibodies also detect expression of the protein in formalin-fixed, paraffin-embedded human tissues. The RTJ1 monoclonal antibody gave superior staining, showing lower background and more pronounced cell surface immunoreactivity. The c-erbB-3 protein was found in normal epithelial cells throughout the GI tract, in squamous epithelium of the oropharanyx and oesophagus, in the parietal cells of the stomach, and in the surface enterocytes of the small and large bowel. Seventy-six tumours arising at these sites were examined for c-erbB-3 protein expression. Widely varying levels of expression were seen, from absent to intense staining with cell membrane accentuation. |
| Databáze: | OpenAIRE |
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