Effects on Growth of Human Osteoblast-Like Cells of Three Nonsteroidal Anti-Inflammatory Drugs: Metamizole, Dexketoprofen, and Ketorolac

Some nonsteroidal anti-inflammatory drugs (NSAIDs) have adverse effects on bone tissue. The objective of this study was to determine the effect of different doses of dexketoprofen, ketorolac, and metamizole on growth of the osteoblast MG63 cell line. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide spectrophotometry results showed that MG63 cell growth was significantly inhibited after 24 hr of culture with doses of 10, 20, 100, or 1,000 mu M of each NSAID and with doses of 0.1, 1, or 5 mu M of dexketoprofen and ketorolac but not metamizole. Cell-cycle studies revealed that dexketoprofen and ketorolac treatments significantly arrested the cell cycle in phase G(0)/G(1), increasing the percentage of cells in this phase. Apoptosis/necrosis studies showed significant changes versus control cells, with an increased percentage of cells in apoptosis after treatment with 10, 100, or 1,000 mu M of metamizole and after treatment with 1, 10, 100, or 1,000 mu M of dexketoprofen or ketorolac. In conclusion, treatment of osteoblast-like cells with high doses of the NSAIDs tested increased not only the percentage of cells in apoptosis but also the percentage of necrotic cells.