Osteopontin expression correlates with melanoma invasion

Zhou, Youwen, Dai, Derek, Martinka, Magdalena, Su, Mingwan, Zhang, Yi, Campos, Eric, Dorocicz, Irene, Tang, Liren, Huntsman, David, Nelson, Colleen, & Li, Gang (2005) Osteopontin expression correlates with melanoma invasion. Journal of Investigative Dermatology, 124(5), pp. 1044-1052.

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Melanoma is one of the most aggressive cancers affecting humans. Although early melanomas are curable with surgical excision, metastatic melanomas are associated with high mortality. The mechanism of melanoma development, progression, and metastasis is largely unknown. In order to uncover genes unique to melanoma cells, we used high-density DNA microarrays to examine the gene expression profiles of metastatic melanoma nodules using benign nevi as controls. Over 190 genes were significantly overexpressed in metastatic melanomas compared with normal nevi by at least 2-fold. One of the most abundantly expressed genes in metastatic melanoma nodules is osteopontin (OPN). Immunohistochemistry staining on tissue microarrays and individual skin biopsies representing different stages of melanoma progression revealed that OPN expression is first acquired at the step of melanoma tissue invasion. In addition, blocking of OPN expression by RNA interference reduced melanoma cell numbers in vitro. Our observations suggest that OPN may be acquired early in melanoma development and progression, and may enhance tumor cell growth in invasive melanoma.

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ID Code: 37547
Item Type: Journal Article
Refereed: Yes
DOI: 10.1111/j.0022-202X.2005.23680.x
ISSN: 0022-202X
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Deposited On: 30 Sep 2010 01:29
Last Modified: 29 Feb 2012 13:29

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