Abstract
Objective To study the protective effect of Radix Salviae Milliorrhizae Extract (764-3) on hyperoxia-induced acute lung injury of neonatal rats and to compare the effect of it with that of superoxide dismutase (SOD).Methods Hyperoxia lung injury model was established by putting Sprague Dawley neonatal rats into self-made oxygen box within high-concentration oxygen(≥90 % O2)for 7 days. Interfered with SOD and 764-3 respectively, the lung index, contents of malondialdehyde (MDA), activity of SOD, radical alveolar counts (RAC) and pathological changes have been compared. Meanwhile, terminal deoxynucleotidyl transferase biotin-dUTP nick end labeling (TUNEL) was utilized to detect the number of apoptosis of lung cells. Results On the seventh day, the contents of MDA and the number of apoptosis of lung cells of SOD prevention group and 764-3 prevention group were lower than those of the hyperoxia-exposed group( P 0.05).However, compared with those of hyperoxia-exposed group, the lung index of 764-3 prevention group showed insignificant difference(P >0.05). Conclusion Radix Salviae Milliorrhizae Extract (764-3) may have certain protective effect on hyperoxia-in-duced acute lung injury. Key words: Hyperoxia; Acute lung injury; Radix Salviae Milliorrhizae Extract; Rat
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