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Fig. 10. Effects of recombinant Wnt3a on the survival and activity of mature osteoclasts. Osteoclasts were generated from peripheral blood mononuclear cells cultured in the presence of RANKL and M-CSF for 14 days, and treated with recombinant Wnt3a (50 ng/ml) or vehicle alone for the final 48 hours of culture. The number of TRAP-positive osteoclasts and the area of bone resorption were quantified. Wnt3a had no reproducible effect on osteoclast survival or their resorptive activity. Data are mean ± s.e.m., n=5.