产前地塞米松对孕鼠和早产胎鼠IGF–I的影响.docVIP

产前地塞米松对孕鼠和早产胎鼠IGF-Ⅰ的影响 陈贵岭1 成要平2* (1山西医科大学第二医院医院妇产科 030001； 2*山西医科大学第一临床医学院妇产科 030009，通讯作者) 【摘要】 目的：地塞米松在促进早产胎鼠肺脏成熟的同时对孕鼠和早产胎鼠IGF-I的影响。方法：18只孕鼠随机分为对照组（CT组SD-DEX），地塞米松多剂量（MD-DEX），在孕鼠怀孕14、15天给予不同剂量的地塞米松,在孕鼠怀孕16.5天行剖宫产终止妊娠，电镜下观察胎鼠肺脏成熟度，放射免疫法测定孕鼠血清、胎鼠羊水中IGF-I的含量，进行同组间的相关性分析；免疫组化法进行胎鼠肝脏和胎盘中IGF-I的表达，进行同组间胎鼠肝脏与胎盘中IGF-Ⅰ的相关性分析。结果：产前地塞米松应用在促进早产胎鼠肺脏成熟的同时可以导致孕鼠血清中IGF-Ⅰ含量明显下降，这与用药后孕鼠体重下降有相关性。孕鼠血清中IGF-I和胎鼠羊水中IGF-I没有相关性。结论：地塞米松在促进早产胎鼠肺成熟的同时影响了孕鼠血清和胎鼠羊水中IGF-Ⅰ含量，影响孕鼠体重变化和胎鼠的生长发育。 关键词：地塞米松，生长和胚胎发育，胰岛素样生长因子－I，大鼠，早产 Effect of dexamethasone on pregnant and preterm birth of fetal rat with IGF-I CHEN Guiling1 CHENG YaoPing2 (1Second Clinical Medical college,Shanxi Medical University 030001；2Frist Clinical Medical College,Shanxi Medical University,030009；*CorresPonding author,Tel E-mail:cglsummer@) [Abstract] Objective To explore the of dose of dexamethasone administered antenatally on lung morphogenesis of rat embroy and correlation with insulin-like growth factor-I(IGF-I) of pregnant rat and fetal amniotic.Methods Eighteen pregnant rats were randomly assigned to three group with 6 in each,control,single dose detamethasone (SD-DEM),multilate dose dexamethasone (MD-DEM).It injected dexamethasone of different dose on the 14th,15th.All fetuses were delivered by cesarean delivery on the 16.5th.The lung mature and growth of fetal mice were compared at morphometric.The IGF-I of serum pregnant rat and fetal amniotic were measured by radioimmunoassay and analysised the correlation between the same group.The IGF-I of fetal rat liver and placental were measured by immunohistochemistry and analysised the correlation between the same group.Results It is leaded to lower of serum pregnant with IGF-I that injected dexamethasone before cesarean,there was correlation between weight of pregnant rat and IGF-I of serum pregnant.there was no correlation between IGF-I of serum pregnant and the amniotic fluid IGF-I of fetal rat. Conclusions Antenatal treatment with dexamethasone may