Document Detail

Oncostatin M induces cell detachment and enhances the metastatic capacity of T-47D human breast carcinoma cells.
MedLine Citation:
PMID:  16713283     Owner:  NLM     Status:  MEDLINE    
Oncostatin M (OSM), an IL-6 family cytokine, has previously been shown to increase migration of several breast cancer cell lines in vitro. Our studies report additional effects of OSM treatment on the human breast carcinoma cell line T-47D. OSM treatment alters T-47D cell morphology from a normal epithelial phenotype to a mesenchymal-like phenotype that is associated with cell detachment from substratum. These effects are also seen with H3922 human breast cancer cells. OSM treatment of T-47D cells for 5-8 days leads to a three-fold increase in cell detachment. OSM-induced detachment of T-47D cells is blocked by the protein kinase inhibitors UO126 and bisindolylmaleimide, indicating a role for MAP kinases and protein kinase C in OSM signaling events that regulate cell detachment. T-47D cells induced to detach by OSM have a reduced capacity to re-adhere to laminin in comparison to other extracellular matrix components. Detached multi-cell aggregates of T-47D cells are viable, whereas detached single cells appear apoptotic. In addition, OSM treatment induces the secretion of the lysosomal proteases cathepsins D and L from T-47D cells, which have been implicated in invasion and metastasis. Importantly, OSM-treated T-47D cells show a 250% increase in invasive capacity as measured by the Matrigel invasion chamber assay. Collectively, these data demonstrate that OSM induces a motile/invasive phenotype in T-47D cells in vitro, and suggest that OSM may enhance metastasis in vivo. Our results suggest that OSM itself may be a valid therapeutic target.
Cheryl L Jorcyk; Ryan G Holzer; Randall E Ryan
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2006-05-19
Journal Detail:
Title:  Cytokine     Volume:  33     ISSN:  1043-4666     ISO Abbreviation:  Cytokine     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-06-07     Completed Date:  2006-08-16     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9005353     Medline TA:  Cytokine     Country:  United States    
Other Details:
Languages:  eng     Pagination:  323-36     Citation Subset:  IM    
Department of Biology, Boise State University, 1910 University Drive, Science-Nursing Building, Room 227, Boise, ID 83725, USA.
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MeSH Terms
Antineoplastic Agents / pharmacology*
Apoptosis / physiology
Breast Neoplasms / enzymology,  pathology*
Cell Adhesion / physiology
Cell Line, Tumor
Cytokines / physiology*
Neoplasm Invasiveness / pathology
Neoplasm Metastasis / pathology
Oncostatin M
Grant Support
Reg. No./Substance:
0/Antineoplastic Agents; 0/Cytokines; 0/OSM protein, human; 106956-32-5/Oncostatin M

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