Potential clinical relevance of Eph receptors and ephrin ligands expressed in prostate carcinoma cell lines

Biochemical and Biophysical Research Communications
Brian P FoxRaj P Kandpal

Abstract

The family of Eph and ephrin receptors is involved in a variety of functions in normal cells, and the alterations in their expression profiles have been observed in several cancers. We have compared the transcripts for Eph receptors and ephrin ligands in cell lines established from normal prostate epithelium and several carcinoma cell lines isolated from prostate tumors of varying degree of metastasis. These cell lines included NPTX, CTPX, LNCaP, DU145, PC-3, and PC-3ML. The cell lines displayed characteristic pattern of expression for specific Eph receptors and ephrin ligands, thus allowing identification of Eph receptor signatures for a particular cell line. The sensitivity of these transcripts to genome methylation is also investigated by treating the cells with 5-aza-2'-deoxycytidine. The comparison of expression profiles revealed that normal prostate and primary prostate tumor cell lines differ in the expression of EphA3, EphB3, and ephrin A3 that are over-expressed in normal prostate. Furthermore, the transcript levels for EphA1 decrease progressively from normal prostate to primary prostate tumor cell line and metastatic tumor cells. A converse relationship was observed for ephrin B2. The treatment of cells with 5-aza-2'...Continue Reading

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