IN VITRO
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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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.

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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