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Selectin-independent adhesion during ovarian cancer metastasis.

AbstractPURPOSE:
Ovarian cancer (OvCa) progression mainly takes place by intraperitoneal spread. Adhesion of tumor cells to the mesothelial cells which form the inner surface of the peritoneum is a crucial step in this process. Cancer cells use in principle different molecules of the leukocyte adhesion cascade to facilitate adhesion. This cascade is initiated by selectin-ligand interactions followed by integrin - extracellular matrix protein interactions. Here we address the question whether all tumor cells predominantly employ selectin-dependent leukocyte-like adhesion cascade (SDAC) or whether they use integrin mediated adhesion for OvCa progression as well.
METHODS:
A comparative transcriptomic analysis of the human OvCa cell lines OVCAR8 and SKOV3 was performed. Intraperitoneal xenograft model of OVCAR8 cells was used to determine whether there is a correlation between SDAC gene expression and the metastatic potential of the control cells and the cells overexpressing c-Fos. Transcriptomic analysis of OVCAR8 and SKOV3 samples was performed using microarrays.
RESULTS:
One-third of the protein-coding genes involved in SDAC exhibited lower expression levels in OVCAR8 than in SKOV3 cells. In contrast to SKOV3 cells, c-Fos overexpression in OVCAR8 cells did not significantly influence the expression of SDAC genes. Intraperitoneal xenograft model of OVCAR8 cells unexpectedly demonstrated that the aggressiveness of OVCAR8 tumors was not depended on the c-Fos expression level and was comparable to that of SKOV3 control tumors. Gene expression analysis of tumors suggests that SKOV3-derived tumor progression was mainly depended on SDAC. Progression of OVCAR8 tumors relied on other cell adhesion molecules that do not interact with selectins.
CONCLUSIONS:
High expression of c-Fos in ovarian cancer cells is not always associated with reduced metastatic potential. Low expression level of SDAC genes may not ensure low OvCa metastatic potential hence alternative adhesion mechanisms involving laminin-integrin interactions exist as well.
AuthorsNadezhda A Khaustova, Diana V Maltseva, Leticia Oliveira-Ferrer, Christine Stürken, Karin Milde-Langosch, Julia A Makarova, Sergey Rodin, Udo Schumacher, Alexander G Tonevitsky
JournalBiochimie (Biochimie) Vol. 142 Pg. 197-206 (Nov 2017) ISSN: 1638-6183 [Electronic] France
PMID28919578 (Publication Type: Journal Article)
CopyrightCopyright © 2017 Elsevier B.V. and Société Française de Biochimie et Biologie Moléculaire (SFBBM). All rights reserved.
Chemical References
  • Selectins
Topics
  • Cell Adhesion
  • Cell Line, Tumor
  • Cell Proliferation
  • Cell Transformation, Neoplastic
  • Epithelium (pathology)
  • Female
  • Gene Expression Regulation, Neoplastic
  • Glycosylation
  • Humans
  • Leukocytes (cytology)
  • Neoplasm Metastasis
  • Ovarian Neoplasms (pathology)
  • Peritoneum (pathology)
  • Selectins (metabolism)

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