Journal Article

The chemokine GRO-α (CXCL1) confers increased tumorigenicity to glioma cells

Yan Zhou, Jing Zhang, Qiang Liu, Robert Bell, Daniel A. Muruve, Peter Forsyth, Mayi Arcellana-Panlilio, Stephen Robbins and V.Wee Yong

in Carcinogenesis

Volume 26, issue 12, pages 2058-2068
Published in print December 2005 | ISSN: 0143-3334
Published online July 2005 | e-ISSN: 1460-2180 | DOI:
The chemokine GRO-α (CXCL1) confers increased tumorigenicity to glioma cells

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The chemokine GRO-α (CXCL1) has been found to mediate the proliferation of glia progenitor cells during neural development. As malignant gliomas are thought to arise from glia progenitors or their differentiated counterparts, astrocytes or oligodendrocytes, we have investigated whether GRO-α regulates the tumor characteristics of glioma cells. We found first that resected glioma specimens were strongly immunoreactive for GRO-α expression in cells with the morphology of tumor cells. In culture, the U251 glioma line transfected to overexpress GRO-α had elevated levels of motility and invasiveness. GRO-α transfectants increased their expression of several proteins associated with migratory behavior, including matrix metalloproteinase-2, β1-integrin and SPARC. The implantation of GRO-α glioma clones into the brain of nude mice caused the early demise of mice and this was associated with the formation of larger intracerebral tumors when compared with mice implanted with vector control lines. These results implicate GRO-α in gliomas and suggest that the dysregulation of a glia proliferative factor contributes to tumorigenesis. Targeting GRO-α may be a useful therapeutic tool to control brain tumor biology.

Keywords: CNS, central nervous system; ELISA, enzyme linked immunosorbent assay; ECM, extracellular matrix; GBM, glioblastoma multiforme; H&E, hematoxylin and eosin; HGF, hepatocyte growth factor; IGF, insulin-like growth factor; MMP, matrix metalloproteinase

Journal Article.  7695 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics

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