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[N-acetylcysteine (NAC) inhibited pulmonary fibrosis in acute respiratory distress syndrome (ARDS)].

[Article in Chinese]

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Department of Cardiovascular Surgery of Intensive Care Unit, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.



To investigate the effect of NAC treatment on lipopolysaccharide (LPS) treated human embryonic lung fibroblasts (HELF), in regard to oxidant injury and changes in indexes related to pulmonary fibrosis in ARDS.


Four groups of cultured HELF were treated with: vehicle, LPS(1 pg/ml), NAC (1 mmol/L)+LPS (1 pg/ml) and dexamethasone (DEX, 1 pmol/L)+LPS (1 pg/ml) for 24 hours. The content of collagen and the γ-glutamylcysteinylglycine (GSH) in the cells were determined.


As compared to the control group, the collagen content (pg/mg: 78.97+1.79 vs. 72.90+1.70)and GSH content (pg/mg: 23. 27 0. 92 vs. 26. 34+ 0. 83) in LPS group were significantly (P<0. 05) higher and lower, respectively; NAC and DEX both suppressed the effect of LPS on collagen content (72. 23 ± 1.35, 73.64 1.89 vs. 78.97 + 1.79); and GSH content (26.52 0.62, 25.85 ± 0.60 vs. 23.27+ 0.92)significantly (P < 0. 05 or P < 0. 01) in the treated cells. No significant difference was found between NAC+LPS and DEX+LPS group, either in the content of collagen or GSH.


NAC can inhibit oxidant injury and pulmonary fibrosis in ARDS.

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