Vitti G, Hamilton JA. Modulation of urokinase-type plasminogen activator messenger RNA levels in human synovial fibroblasts by interleukin-1, retinoic acid, and a glucocorticoid.
Arthritis Rheum 1988;
31:1046-51. [PMID:
3136776 DOI:
10.1002/art.1780310817]
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Abstract
Previous studies have shown that mononuclear cell-conditioned medium (MCCM), interleukin-1 (IL-1), and all-trans-retinoic acid rapidly stimulate, while glucocorticoids lower, the urokinase-type plasminogen activator (u-PA) activity of human synovial fibroblast-like cells. It is now reported that MCCM, recombinant human IL-1 alpha (rHuIL-1 alpha), rHuIL-1 beta, and all-trans-retinoic acid elevate the u-PA messenger RNA (mRNA) levels to a steady-state value within 2 hours, while dexamethasone (10(-7)M) inhibits this increase. For both situations, when the u-PA activity is either stimulated or reduced, the changes in the u-PA mRNA levels parallel the changes in the u-PA activity, and it is suggested that modulation of gene transcription plays an important role.
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