Stimulation of plasminogen activator in osteoblast-like cells by bone-resorbing hormones

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Abstract

Hormonal control of plasminogen activator (PA) was studied in clonal rat osteogenic sarcoma cells which are phenotypically osteoblast, and in osteoblast-rich rat bone cell cultures. The bone-resorbing hormones (parathyroid hormone, prostaglandin E2, epidermal growth factor and 1,25-dihydroxyvitamin D3) stimulated PA activity in both cell types. The relative efficacies of vitamin D metabolites and of prostanoids reflect their relative potencies as stimulators of bone resorption.

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