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Effects of curcumin on artery blood gas index of rats with pulmonary fibrosis caused by paraquat poisoning and the expression of Mothers against decapentaplegic homolog 4 (Smad4), Smad ubiquitination regulatory factor 2 (Smurf2), interleukin-4 (IL-4) and interferon-γ (IFN-γ) were explored. A total of 54 Wistar rats were randomly selected, of which 36 rats were selected for paraquat poisoning pulmonary fibrosis modeling, and 18 were used in the control group for normal feeding. Then, 18 rats were randomly selected from the modeled groups and injected with curcumin and classified as the curcumin group. The remaining 18 rats were not processed and 17 were successfully modeled as the paraquat group. The expression of SMAD4, Smurf2, IL-4 and INF-γ was detected by enzyme-linked immunosorbent assay. Abdominal aortic blood was taken for determination of pH, arterial partial pressure of oxygen (PaO 2 ) and arterial partial pressure of carbon dioxide (PaCO 2 ). The artery blood PaO 2 and serum INF-γ of the curcumin and paraquat groups were significantly higher on day 1 than those on day 5 (P&lt;0.05). The artery blood PaO 2 and serum INF-γ in the curcumin group were higher than those in the paraquat group (P&lt;0.05). The artery blood PaCO 2 , serum Smad4, Smurf2 and IL-4 in the curcumin group were significantly lower on day 1 than those on day 5 (P&lt;0.05). The artery blood PaCO 2 , serum Smad4, Smurf2 and IL-4 in the paraquat group were significantly lower on day 1 than those on day 5 (P&lt;0.05). The PaCO 2 , serum Smad4, Smurf2 and IL-4 in the curcumin group were lower than those in the paraquat group (P&lt;0.05). In conclusion, curcumin can effectively improve pulmonary fibrosis in rats after treatment with paraquat poisoning. The results show that it is expected to be an effective drug for the treatment of paraquat, and provide effective reference and guidance for clinical treatment.

experimental and therapeutic medicine

Effects of curcumin on artery blood gas index of rats with pulmonary fibrosis caused by paraquat poisoning and the expression of Smad 4, Smurf 2, interleukin‑4 and interferon‑γ