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  • Title: Basal release of urokinase plasminogen activator, plasminogen activator inhibitor-1, and soluble plasminogen activator receptor from separated and cultured endometriotic and endometrial stromal and epithelial cells.
    Author: Bruse C, Guan Y, Carlberg M, Carlström K, Bergqvist A.
    Journal: Fertil Steril; 2005 Apr; 83 Suppl 1():1155-60. PubMed ID: 15831288.
    Abstract:
    OBJECTIVE: To investigate whether separated and cultured endometriotic and endometrial stromal and epithelial cells release urokinase plasminogen activator (uPA), plasminogen activator inhibitor-1 (PAI-1), and soluble plasminogen activator receptor (suPAR) antigens in vitro. DESIGN: In vitro study. SETTING: University hospital clinic. PATIENT(S): Regularly menstruating women with and without endometriosis. INTERVENTION(S): Tissue samples were collected at surgery performed for clinical reasons. MAIN OUTCOME MEASURE(S): The antigen concentrations of uPA, PAI-1, and suPAR in culture medium were assayed by enzyme-linked immunosorbent assay. RESULT(S): Both stromal and epithelial cells from endometriotic and endometrial tissue released the three types of antigens, but the release of PAI-1 was significantly higher from stromal cells in the three types of tissue than from epithelial cells. Furthermore, the release of PAI-1 was significantly higher from endometriotic cells than from endometrial stromal cells. CONCLUSION(S): This study has demonstrated the basic capacity of separated epithelial and stromal cells from all three types of tissue to release uPA, PAI-1, and suPAR without any paracrine influence, as in vivo. The higher release of PAI-1 from endometriotic stromal cells might have importance for the invasive growth.
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