Fig. 1.
Cell viability as absorbance at A450–A690 in a WST-1 assay in the unstimulated control and upon administration of 10, 50 and 100 μg/ml glucosamine sulfate in MG-63 (a) and SaOS-2 cells (b); a statistical comparism was carried out for the control and each of the glucosamine sulfate treated groups; * indicates statistical significance with p ≤ 0,05