Figure 3From: Downregulation of protein disulfide isomerase in sepsis and its role in tumor necrosis factor-alpha releaseAlterations in the protein disulfide isomerase (PDI) protein expression in RAW 264.7 cells after stimulation of lipopolysaccharide (LPS) (100 ng/mL) for 4 hours. The ratio of PDI and the housekeeping gene β-actin is calculated. Values (n = 4/group) are presented as mean ± standard error and are compared by Student t test: *P < 0.05 versus control.Back to article page