As shown in Figure 3(A), the protein expression of fibronectin (0.51 ± 0.03 vs. 0.26 ± 0.06) and α-SMA (0.70 ± 0.09 vs. 0.48 ± 0.05) was increased in the PF group compared to the control group (p < 0.05). The gene discussed is FN1; the disease is pemphigus foliaceus.