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S100A2, a Putative Tumor Suppressor Gene, Regulates In Vitro Squamous Cell Carcinoma Migration
- Source :
- Laboratory Investigation. 81:599-612
- Publication Year :
- 2001
- Publisher :
- Elsevier BV, 2001.
-
Abstract
- It has been previously shown that S100A2 is down-regulated in tumor cells and can be considered a tumor suppressor. We have recently shown that this down-regulation can be observed particularly in epithelial tissue, where S100A2 expression decreases remarkably in tumors as compared with normal specimens. In the present paper we investigate whether S100A2 could play a tumor-suppressor role in certain epithelial tissues by acting at the cell migration level. To this end, we made use of five in vitro human head and neck squamous cell carcinoma lines in which we characterized S100A2 expression at both RNA and protein level. To characterize the influence of S100A2 on cell kinetic and cell motility features, we used two complementary approaches involving specific antisense oligonucleotides and the addition of S100A2 to the culture media. The different expression analyses gave a coherent demonstration of the fact that the FADU and the RPMI-2650 cell lines exhibit high and low levels of S100A2 expression, respectively. Antisense oligonucleotides (in FADU) and extracellular treatments (in RPMI) showed that, for these two models, S100A2 had a clear inhibitory influence on cell motility while modifying the cell kinetic parameters only slightly. These effects seem to be related, at least in part, to a modification in the polymerization/depolymerization dynamics of the actin microfilamentary cytoskeleton. Furthermore, we found evidence of the presence of the receptor for advanced glycation end-products (RAGE) in RPMI cells, which may act as a receptor for extracellular S100A2. The present study therefore presents experimentally based evidence showing that S100A2 could play a tumor-suppressor role in certain epithelial tissues by restraining cell migration features, at least in the case of head and neck squamous cell carcinomas.
- Subjects :
- Pathology
medicine.medical_specialty
Tumor suppressor gene
Polymers
Receptor for Advanced Glycation End Products
Cell
Down-Regulation
Biology
Pathology and Forensic Medicine
Cell Movement
Tumor Cells, Cultured
medicine
Extracellular
Humans
Genes, Tumor Suppressor
RNA, Messenger
Receptors, Immunologic
Receptor
Molecular Biology
Actin
Chemotactic Factors
S100 Proteins
Cell migration
Cell Biology
Oligonucleotides, Antisense
Actins
Cell biology
Kinetics
medicine.anatomical_structure
Epidermoid carcinoma
Head and Neck Neoplasms
Cell culture
Carcinoma, Squamous Cell
Subjects
Details
- ISSN :
- 00236837
- Volume :
- 81
- Database :
- OpenAIRE
- Journal :
- Laboratory Investigation
- Accession number :
- edsair.doi.dedup.....e14efbe2cc10ceb67ba76c0895d07c61
- Full Text :
- https://doi.org/10.1038/labinvest.3780269