Fig. 1.

Effect of remifentanil treatment on cell viability and proliferation. Remifentanil did not affect cell proliferation and did not have cytotoxic effects on osteoclast precursor cells. A BMMs were cultured in a medium containing the indicated concentrations of remifentanil (0–100 ng/ml) for 24 h. Cell viability was evaluated by an MTT assay. B BMMs were cultured in osteoclastogenic medium for 3 days together with remifentanil (0–100 ng/ml). Cell proliferation was measured by MTT assay. BMMs bone marrow-derived macrophages