Cold-shock domain family member YB-1 expression in endometrium and endometriosis

Cássia Gisele Terrassani Silveira, Silveira CG, C G T Silveira, J Krampe, Krampe J, Jean Krampe, Ruhland B, B Ruhland, Brigitte Ruhland, Diedrich K, K. Diedrich, D Hornung, Daniela Hornung, Hornung D, A. Agic, Agic A
Human Reproduction · 2011 · vol. 27(1) , pp. 173–182 · doi:10.1093/humrep/der368 · PMID:22095791 · W2101934004
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YB-1 expression was higher in endometriosis tissues and macrophages, and its knockdown reduced cell proliferation, invasion, and apoptosis in an endometriosis cell line.

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Abstract

BACKGROUND: The Y-box-binding protein (YB-1) is described as a potential oncogene highly expressed in tumors and associated with increased cell survival, proliferation, migration and anti-apoptotic signaling. The aim of our study was to examine the expression and role of YB-1 in human endometriosis (Eo) and its association with cell survival, proliferation and invasion. METHODS: We analyzed the gene and protein expression levels of YB-1 by quantitative real-time RT-PCR and immunoassays, respectively, in peritoneal macrophages, ovarian endometrioma and eutopic endometrial tissues/cells derived from women with (n= 120) and without (n= 91) Eo. We also evaluated the functional consequences of YB-1 knockdown in the Z12 Eo cell line by measuring cell proliferation [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromid cell proliferation assay], invasion (Matrigel invasion assay) and spontaneous and tumour necrosis factor (TNFα)-induced RANTES (regulated upon activation, normal T-cell expressed and secreted chemokine) expression and apoptosis (ELISA-based assay). RESULTS: YB-1 gene and protein expression was statistically significantly higher in ovarian lesions, eutopic endometrium and peritoneal macrophages of patients with Eo in comparison with the control group. Interestingly, the strongest YB-1 expression was observed in the epithelial compartment of endometrial tissues. In the Z12 cell line, YB-1 knockdown resulted in significant cell growth inhibitory effects including reduced cell proliferation and increased rates of spontaneous and TNFα-induced apoptosis. Significantly, higher RANTES expression and decreased cell invasion in vitro were also associated with YB-1 inactivation. CONCLUSION: High YB-1 expression could have an impact on the development and progression of Eo. This study suggests the role of YB-1 as a potential therapeutic target for Eo patients.

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Condition tags

endometriosisendometrioma

MeSH descriptors

Endometriosis Endometrium Gene Expression Regulation Gene Expression Regulation Y-Box-Binding Protein 1 Adult Adult Apoptosis Apoptosis Cell Proliferation Cell Proliferation Cell Survival Cell Survival Chemokine CCL5 Chemokine CCL5 Chemokine CCL5 Collagen Collagen Collagen Drug Combinations

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