[Expression of heat shock protein 70 in lung and plasma of rats with pulmonary fibrosis induced by SiO2].

Objective: To investigate the dynamic expression of Heat shock protein 70 (Hsp70) in the lungs and plasma of rats with pulmonary fibrosis induced by silicon dioxide (SiO2).

Methods: Forty-eight Wistar rats were randomly divided into the control group exposed to normal solution and group exposed to SiO2 (50 mg/ml) with intratracheal injection. Each group was divided into four subgroups.