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Growth-regulated oncogene-1 expression is associated with angiogenesis and lymph node metastasis in human oral cancer
Satoru Shintani1, Tohru Ishikawa, Tomoko Nonaka
1Department of Oral and Maxillofacial Surgery, Ehime University School of Medicine, Ehime, Japan. satoru@m.ehime-u.ac.jp
Abstract:
Growth-regulated oncogene-1 (GRO-1) is an autocrine growth factor in melanoma and is a member of the CXC family of chemokines which promote chemotaxis of granulocytes and endothelia through binding to CXC receptor 2. A previous article noted that GRO-1 was upregulated in oral cancer using a genome-wide microarray approach. We have examined the expression of GRO-1 in 9 oral squamous cell carcinoma (OSCC) cell lines and 94 OSCC specimens. Using real-time quantitative polymerase chain reaction analyses, GRO-1 expressions were varied in OSCC cell lines. Of the 94 OSCC specimens, 37 (39.4%) showed GRO-1 cytoplasmic immunostaining, and microvessel density revealed a correlation between GRO-1 expression and tumor angiogenesis. GRO-1 expression was also associated with leukocyte infiltration, and lymph node metastasis. These findings suggest a possible relationship between the expression level of GRO-1 and tumor progression.
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