Table 2: Effects of low-dose UVA on fibroblast cell cycle ( %, ).

Group/cell cyclesSIGLDG (J/cm2)
7.2a14.4b28.8c57.6d115.2e

G0/G183.4 ± 1.0184.4 ± 0.6584.6 ± 0.3684.4 ± 1.5992.7 ± 0.9793.9 ± 0.63
S9.08 ± 0.2810.7 ± 0.7212.3 ± 0.9113.1 ± 1.096.30 ± 1.074.90 ± 0.65
G2 + M6.63 ± 0.894.18 ± 0.382.60 ± 0.551.68 ± 0.370.73 ± 0.280.63 ± 0.22

, compared with SIG, proportion of G0/G1 phase, S phase, and G2/M phase of fibroblasts of each LDG differences were extremely significant ( were −3.440, 3.280, were −9.662, 7.319, were −4.025, 9.316, were −5.788, 10.78, 23.44, were −7.461, 10.58, 4.869); linear regression analysis, the cell cycle distribution of the low-dose group were closely related to cumulative doses of UVA irradiation, respectively, , , .
One-way ANOVA, the proportions of respective phases of cell cycle showed no difference among the 7.2 J/cm2, 14.4 J/cm2, and 28.8 J/cm2 dosages, ; The -test also showed no difference between the dosages of 57.6 J/cm2 and 115.2 J/cm2, .