Figure 2.

GlcN promotes chondrocyte proliferation. (A) Chondrocytes were treated with various concentrations of GlcN for 72 h. (B) Chondrocytes were treated with 100 μg/ml GlcN for 24 and 72 h. (C and D) Chondrocytes were treated with or without GlcN and were stained with propidium iodide followed by fluorescence-activated cell sorting analysis. Percentage of chondrocytes in (E) S phase and (F) G₀/G₁ phase following treatment with or without GlcN. Data are presented as the means ± standard deviation. ^*P<0.05, ^**P<0.01 compared with the untreated cells. GlcN, glucosamine.