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. 2014 Mar 20;9(3):e92168. doi: 10.1371/journal.pone.0092168

Figure 1. Effects of l-arginine on fibroblast proliferation.

Figure 1

(A) This photograph shows human dermal fibroblast at 24 h after treatment with or without 6 mM l-arginine. DMEM with 10%FBS was used as positive control. (B) Fibroblast proliferation was determined by MTS assay after treatment with the indicated concentrations of l-arginine (0–7 mM). Results are expressed as the mean ± SEM of 3 independent experiments. *p<0.05, **p<0.01, as compared with the control group (Student’s t test). (C) The number of trypan blue negative fibroblast at 0, 6, 12 and 24 h after treated with 0 or 6 mM l-arginine. **p<0.01, as compared with the control group (Student’s t test).