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Int. J. Mol. Sci. 2011, 12(10), 6781-6795; doi:10.3390/ijms12106781
Article

The Stimulation of IGF-1R Expression by Lewis(y) Antigen Provides a Powerful Development Mechanism of Epithelial Ovarian Carcinoma

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1 Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, China 2 Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China 3 Department of Biochemistry, Faculty of Science and Technology, Kinki University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
* Author to whom correspondence should be addressed.
Received: 9 August 2011 / Revised: 26 September 2011 / Accepted: 30 September 2011 / Published: 14 October 2011
(This article belongs to the Section Molecular Pathology)
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Abstract

Objective: This study aimed to measure and correlate the expression of insulin-like growth factor receptor-1 (IGF-1R) and the Lewis(y) antigen in ovarian cancer cell lines and tissue samples. Methods: Reverse transcriptase PCR (RT-PCR), Western blotting, immunoprecipitation, immunohistochemistry, and immunofluorescence double-labeling techniques were applied to detect and measure the expression of Lewis(y) and IGF-1R. Results: In α1,2-fucosyltransferase (α1,2-FT)-transfected cells, IGF-1R expression was significantly upregulated compared with cells that do not overexpress α1,2-FT (P < 0.05). The amount of Lewis(y) expressed on IGF-1R increased 1.81-fold in α1,2-FT-overexpressing cells (P < 0.05), but the ratio of Lewis(y) expressed on IGF-1R to total IGF-1R was unaltered between two cells (P > 0.05). In malignant epithelial ovarian tumors, the positivity rates of Lewis(y) and IGF-1R detection were 88.3% and 93.33%, respectively, which is higher than the positivity rates in marginal (60.00% and 63.33%, all P < 0.05), benign (33.00% and 53.33%, all P < 0.01), and normal (0% and 40%, all P 0.05). Both IGF-1R and Lewis(y) were highly expressed in ovarian cancer tissues, and their expression levels were positively correlated (P < 0.05). Conclusion: Overexpression of Lewis(y) results in overexpression of IGF-1R. Both IGF-1R and Lewis(y) are associated with the occurrence and development of ovarian cancers.
Keywords: epithelial ovarian tumor; Insulin-like growth factor receptor-1; Lewis(y) antigen; immunohistochemistry; immunofluorescence double labeling method epithelial ovarian tumor; Insulin-like growth factor receptor-1; Lewis(y) antigen; immunohistochemistry; immunofluorescence double labeling method
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Liu, D.; Liu, J.; Wang, C.; Lin, B.; Liu, Q.; Hao, Y.; Zhang, S.; Iwamori, M. The Stimulation of IGF-1R Expression by Lewis(y) Antigen Provides a Powerful Development Mechanism of Epithelial Ovarian Carcinoma. Int. J. Mol. Sci. 2011, 12, 6781-6795.

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