维甲酸对高氧暴露下新生大鼠肺组织中Ⅰ型胶原含量的影响

被引:6
作者
容志惠
常立文
钱莉玲
张谦慎
机构
[1] 华中科技大学同济医学院儿科
[2] 华中科技大学同济医学院儿科 湖北武汉
[3] 湖北武汉
关键词
维甲酸; 高浓度氧; 肺发育; 胶原; 转化生长因子受体;
D O I
暂无
中图分类号
R722.1 [新生儿疾病];
学科分类号
100202 ;
摘要
为探讨维甲酸对高氧暴露下新生大鼠肺组织中Ⅰ型胶原含量的影响 ,将生后2d的SD大鼠随机分为4组 :①空气+生理盐水组 ;②高氧 +生理盐水组 ;③高氧 +地塞米松组 ;④高氧 +维甲酸组。②、③和④组持续暴露于85 %O2 中 ,于生后14d采用免疫组化和原位杂交方法对肺组织中Ⅰ型胶原蛋白、转化生长因子βⅠ、Ⅱ型受体、肺组织中Ⅰ型胶原mRNA行定位、半定量检测 ,作HE染色行辐射状肺泡计数。结果显示 ,与高氧 +生理盐水组相比 ,高氧 +维甲酸组辐射状肺泡计数显著增加 ,肺组织中Ⅰ型胶原蛋白表达明显增强 ,而Ⅰ型胶原基因表达和转化生长因子βⅠ、Ⅱ型受体表达显著减弱 ,阳性表达明显改变的分布主要在支气管上皮细胞、肺泡上皮细胞和肺内间质细胞。提示维甲酸通过对Ⅰ型胶原mRNA转录后调控和调节Ⅰ型胶原蛋白的降解而增加肺内胶原含量 ,从而起到逆转高氧对肺发育抑制作用
引用
收藏
页码:43 / 45
页数:3
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