Figure 3. Mann-Whitney U-Test showing a significant down-regulation of the poly(ADP-ribose) polymerase-1 mRNA expression in peripheral blood mononuclear cells from patients with chronic obstructive pulmonary disease (n = 85) by an antioxidant tetrapeptide UPF17 in comparison with that in non-obstructive individuals (n = 22) (p = 0.040).
