Transcriptional regulation of adrenomedullin by oncostatin M in human astroglioma cells: Implications for tumor invasion and migration

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Adrenomedullin (ADM), a secretory peptide with multiple functions in physiological to pathological conditions, is upregulated in several human cancers, including brain, breast, colon, prostate, and lung cancer. However, the molecular mechanisms underlying the regulation of ADM expression in cancerous cells are not fully understood. Here, we report that oncostatin M (OSM), a cytokine belonging to the interleukin-6 family, induces ADM expression in astroglioma cells through induction of signal transducer and activator of transcription-3 (STAT-3) phosphorylation, nuclear translocation, and subsequent DNA binding to the ADM promoter. STAT-3 knockdown decreased OSM-mediated expression of ADM, indicating that ADM expression is regulated by STAT-3 in astroglioma cells. Lastly, scratch wound healing assay showed that astroglioma cell migration was significantly enhanced by ADM peptides. These data suggest that aberrant activation of STAT-3, which is observed in malignant brain tumors, may function as one of the key regulators for ADM expression and glioma invasion.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2014-09
Language
English
Article Type
Article
Keywords

SMOOTH-MUSCLE-CELLS; GROWTH-FACTOR; EXPRESSION; STAT3; CANCER; ANGIOGENESIS; ACTIVATION; RECEPTOR; GLIOMAS; LINES

Citation

SCIENTIFIC REPORTS, v.4

ISSN
2045-2322
DOI
10.1038/srep06444
URI
http://hdl.handle.net/10203/192771
Appears in Collection
BiS-Journal Papers(저널논문)
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