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- W1996959663 abstract "The effect of transforming growth factor-β<sub>1</sub> (TGF-β<sub>1</sub>) and interferon-γ (IFN-γ) was studied on urokinase receptor (uPAR) expression of cultured human retinal pigment epithelial (RPE) cells. Human RPE cells were incubated with 1, 5 or 10 ng/ml of TGF-β<sub>1</sub> or with 10, 100 or 1,000 IU/ml of IFN-γ to measure total cellular uPAR protein and released uPAR by enzyme immunoassay. uPAR at cell surface was measured by flow cytometric analysis at 8, 12, 24 and 48 h. uPAR mRNA levels were assayed by Northern blotting at 2, 6, 12 and 24 h. The increase in uPAR gene expression in RPE cells exposed to TGF-β<sub>1</sub> paralleled enhanced uPAR level at the cell surface and in conditioned medium. TGF-β appeared to induce also membrane-bound uPA activity and the release of active plasminogen activator inhibitor-1, indicating that TGF-β has the potential to regulate plasminogen activation at the RPE cell surface. The increase in uPAR gene expression by IFN-γ did not seem to translate into the protein level. We conclude that TGF-β regulates the pericellular proteolysis in RPE cells by increasing uPAR expression." @default.
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- W1996959663 date "1999-01-01" @default.
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- W1996959663 title "Transforming Growth Factor Beta Induces Urokinase Receptor Expression in Cultured Retinal Pigment Epithelial Cells" @default.
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- W1996959663 doi "https://doi.org/10.1159/000055531" @default.
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