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Expression pattern of S100 calcium-binding proteins in human tumors
E C Ilg1, B W Schäfer, C W Heizmann
1Division of Clinical Chemistry, Department of Pediatrics, University of Zurich, Switzerland.
International Journal of Cancer
|November 4, 1996
Summary
Researchers developed specific antibodies for S100 proteins, crucial in cancer. These tools help differentiate tumor types and may aid in future cancer diagnosis and therapy.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- S100 Ca(2+)-binding proteins are of significant interest due to their differential expression in neoplastic tissues.
- Their involvement in metastatic processes and gene organization on chromosome 1q21, a region altered in tumors, highlights their relevance.
- The need for specific diagnostic tools for human tumors is critical.
Purpose of the Study:
- To produce and characterize human recombinant S100 proteins.
- To generate specific polyclonal antibodies against these S100 proteins.
- To investigate the cellular and intracellular localization of S100 proteins in normal and cancerous human tissues.
Main Methods:
- Production and purification of human recombinant S100 proteins.
- Generation of specific polyclonal antibodies.
- Immunohistochemical analysis of S100 protein localization in human tissues and cell lines.
Main Results:
- S100A1 and S100A2 were detected in limited normal tissues.
- S100A4, S100A6, and S100B showed higher expression levels in cancer tissues.
- Distinct cellular and intracellular localization patterns were observed for different S100 proteins.
Conclusions:
- The generated S100 antibodies are specific and useful for immunohistochemical analysis.
- Differential expression patterns of S100 proteins in normal versus cancer tissues were established.
- These S100 antibodies hold potential for future applications in cancer diagnosis and therapy.