弹性蛋白在高氧致新生鼠慢性肺疾病中的表达及其作用

目的研究弹性蛋白在高氧致新生鼠慢性肺疾病中的表达及其作用。方法将足月新生大鼠144只随机分为高氧组和空气组，分别于实验1d，3d，7d，10d，14d和21d应用弹力纤维染色、原位杂交技术分别检测secondary crest定量、tropoelastinmRNA表达。结果高氧组在3～14dsecondary crest与空气组相比较明显降低（P〈0．05）；高氧组在3～10d tropoelastin mRNA表达与空气组相比较明显降低（P〈0．05），14d和21d tropoelastin mRNA表达与空气组相比较明显增加（P〈0．05），弹性蛋白原合成的高峰滞后。结论弹性蛋白参与CLD肺泡发育受阻和肺纤维化的发生。

The expression and effect of elastin in full-term rats with hyperoxia induced by chronic lung diseases

Objective To investigate the expression and effect of elastin in full-term rats with hyperoxia induced by chronic lung diseases. Methods One hundred and forty-four full-term rats are randomly exposed to hyperoxia (hyperoxia group)and room air(room air group).Chronic lung disease(CLD)is induced by hyperoxia exposure. Gomori's stain for elastic fibers and in situ hybridization methods were used to detect the expressions of secondary crest and tropoelastin mRNA on the 1st,3 rd, 7th, 10th,14th and 21st days after exposure. Results The expressions of secondary crest decreased significantly in hyperoxia group, compared with room air group on the 3rd to 14th days(P＜0.05).The expressions of tropoelastin mRNA decreased significantly in hypemxia group, compared with room air group on the 3rd to 10th days (P＜0.05),otherwise increased significantly from the 14th to 21 st days(P＜0.05). Hyperoxia exposure can delay the peak of tropoelastin mRNA. Conclusion Elastin is involved in the inhibition of alveolarization and lung fibrosis in the development of CLD.