The lung tissues were homogenized and centrifuged to obtain the supernatant. Radioimmunoprecipitation assay lysis buffer (Solarbio, Beijing, China) was used to lyse cells. The lysate was then centrifuged to obtain the supernatant. The protein concentration was measured using Bicinchoninic acid (BCA) protein concentration kit (Beyotime, Shanghai, China) and then diluted to 1 mg/ml with saline. Subsequently, the MDA detection kit (Jiancheng, Nanjing, China) was used to measure the MDA level according to the manufacturer's instructions.
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