Fig. 2

Vibration-induced changes in the expression of vasoactive factors in plasma of workers, plasma of rats, HUVEC and supernatant. (A) Comparison of plasma concentrations of six vasoactive factors among three groups of workers. ^**P < 0.01, compared with the control group (n = 50); ^##P < 0.01, compared between the vibration white finger (VWF) group (n = 50) and the vibration non-white finger (non-VWF) group (n = 50). (B) Comparison of plasma concentrations of six vasoactive factors among five groups of rats. ^*P < 0.05,^**P < 0.01, compared with the control group (n = 5); ^#P < 0.05, ^##P < 0.01, compared between 1 day (n = 5) and 3 days (n = 5), 7 days (n = 5) , 14 days (n = 5); ^NP < 0.05, ^NNP < 0.01, compared between 3 and 7 days, 14 days; ^XP < 0.05, ^XXP < 0.01, compared between 7 and 14 days. (C) Cells and supernatants in one-day group and two-day group were collected after vibration for 2.5 h. N = 3 experimental replicates per group. ^*P < 0.05, ^**P < 0.01, compared with the control group; ^#P < 0.05, ^##P < 0.01, compared with the 20 Hz group.