The expression of annexin II and Lewis y antigen in ovarian epithelial tumors and the correlation between them.

Abstract

The main aim of this study was to explore the molecular structural relationship between annexin II (ANXA2) and Lewis y antigen by determining their expression patterns and clinical significance in ovarian epithelial carcinoma. The structural relationship between ANXA2 and Lewis y antigen was examined using immunoprecipitation and confocal laser scanning microscopy in two ovarian caner cell lines ES-2 and CaoV-3. We also constracted the stably transfected cell lines with low ANXA2 gene expression in order to detect the expression level between ANXA2 and Lewis y. ANXA2 and Lewis y were detected in tissues from malignant, borderline, benign, and normal ovarian tissues using immunohistochemical analysis. ANXA2 and Lewis y were present in both two ovarian cancer cells and ANXA2 contained Lewis y antigen. Moreover, expression of Lewis y antigen in ANXA2 from cell after transfection was higher than that before. Our immunohistochemistry data revealed significantly higher positive expression rates of ANXA2 in malignant ovarian tissues, compared to benign tumor and normal tissue, similar to Lewis y antigen levels in ovarian cancer. Notably, tissues displaying marked expression of ANXA2 simultaneously expressed high levels of Lewis y antigen. A linear correlation between the expression patterns of ANXA2 and Lewis y antigen was evident. Consistently, double-labeling immunofluorescence experiments illustrated co-localization of ANXA2 and Lewis y antigen within the same area. In conclusions, ANXA2 contains Lewis y antigen. Our results further demonstrate a close correlation between the expression levels of the two antigens, which are significantly high in ovarian cancer.

• Authors: Huiyu Zhuang, Mingzi Tan, Juanjuan Liu, Xiao Li, Jian Gao, Zhenhua Hu, Lu Deng, Liancheng Zhu, Bei Lin
• Journal: Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine (Tumour Biol) Vol. 36 Issue 4 Pg. 2343-9 (Apr 2015) ISSN: 1423-0380 [Electronic] Netherlands
• PMID: 25416440 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Annexin A2
• Lewis Blood Group Antigens
• Lewis Y antigen

Topics

• Adolescent
• Adult
• Aged
• Aged, 80 and over
• Annexin A2 (biosynthesis, genetics)
• Carcinoma, Ovarian Epithelial
• Cell Proliferation
• Female
• Gene Expression Regulation, Neoplastic
• Humans
• Immunohistochemistry
• Lewis Blood Group Antigens (biosynthesis, genetics)
• Microscopy, Confocal
• Middle Aged
• Neoplasms, Glandular and Epithelial (classification, genetics, pathology)
• Ovarian Neoplasms (classification, genetics, pathology)