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| c-Src protein expression is increased in human breast cancer. An immunohistochemical and biochemical analysis |
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| Author(s): Verbeek BS, Vroom TM, AdriaansenSlot SS, OttenhoffKalff AE, Geertzema JGN, Hennipman A, Rijksen G |
| Source: JOURNAL OF PATHOLOGY Volume: 180 Issue: 4 Pages: 383-388 Published: DEC 1996 |
| Times Cited: 129 References: 31 |
| Abstract: In human breast cancer, c-Src activity is elevated compared to normal breast tissue. It is not yet known whether this increase in c-Src activity is accompanied by an increase in c-Src protein expression. In this study, c-Src activity and protein expression were determined in a series of human breast cancers and in normal breast tissue, using immune complex kinase assays and immunoblotting. As the heterogeneity of breast cancer is not taken into account in these biochemical experiments, immunohistochemistry was also used to distinguish between normal and malignant cells. In human breast cancers, the c-Src activity is increased 4- to 30-fold, compared with normal breast tissue. This enhanced activity is accompanied by an increase in c-Src protein expression, as shown by both immunoblotting and immunohistochemistry. Immunohistochemistry indicates that the majority of c-Src appears to be concentrated around the nucleus in malignant cells, whereas in normal cells, it is distributed more evenly in the cytoplasm. These data confirm that c-Src activity is increased in human breast cancer. In addition, this study provides strong immunohistochemical evidence that the c-Src protein is also overexpressed, enabling a distinction to be made between normal and malignant cells. |
| Document Type: Article |
| Language: English |
Addresses:
1. UNIV UTRECHT HOSP, DEPT HEMATOL, LAB MED ENZYMOL, NL-3508 GA UTRECHT, NETHERLANDS
2. UNIV UTRECHT HOSP, DEPT PATHOL, NL-3508 GA UTRECHT, NETHERLANDS
3. UNIV UTRECHT HOSP, DEPT SURG, NL-3508 GA UTRECHT, NETHERLANDS |
| Publisher: JOHN WILEY & SONS LTD, BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD |
| Subject Category: Oncology; Pathology |
| IDS Number: WB695 |
| ISSN: 0022-3417 |
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