Antioxidant Activity Mediates Pirfenidone Antifibrotic Effects in Human Pulmonary Vascular Smooth Muscle Cells Exposed to Sera of Idiopathic Pulmonary Fibrosis Patients

Figure 4

(a-b) Effects of IPF sera on HPASMC proliferation. Subconfluent HPASMCs were cultured for 48 hours in basal medium containing 10% (v/v) of sera from idiopathic pulmonary fibrosis (IPF), sera from idiopathic pulmonary fibrosis patients treated for 24 weeks with Pirfenidone (IPF + D), and healthy donors (HD). In selected experiments, cells were pretreated for 60 min with the NADPH oxidase inhibitor diphenyleneiodonium (DPI) before exposure to the sera. Data are expressed as ng/ml collagen protein. (a-b) Data are expressed as relative light units/sec (RLU/s). value indicating that the significance is reported in the figure.

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