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关键词: 胰岛素样生长因子,胎儿生长迟缓,胎儿器官成熟
引言
胎儿宫内发育迟缓(IUGR)是指出生体质量小于其孕龄平均体质量的第10百分位者,或者小于其平均体质量的两个标准差者.发病率约为3%~4%.IUGR是围产儿死亡的重要原因之一,新生儿期及远期发病率明显增高.在儿童期比正常儿体格和智力发育均落后.还有研究提示IUGR和成年期发生糖尿病及心血管病有因果联系[1].鉴于以上原因,IUGR的病因探讨越来越受到人们的重视,尤其是对IUGR内分泌方面的研究也越来越深入.本文着重综述近年来胰岛素样生长因子(insulin-like growth factors,IGFs)与IUGR关系的研究进展情况.
1 IGFs
1957年Salmon发现生长激素(growth hormone,GH)是通过硫酸盐因子介导而间接发挥其硫酸盐活性的.该硫酸盐因子就是后来的IGFs,并从那时起开始了对IGFs的研究.随着对这种生长激素依赖因子的多种代谢作用和不被抗胰岛素抗体阻断的活性的认识,统称为促生长因子(somatomedins).在研究其化学结构的同时,提纯了两种相同的物质,促生长因子A和促生长因子C.由于它们与胰岛素的结构相似被称为胰岛素样生长因子,包括IGF-Ⅰ和IGF-Ⅱ.IGF-Ⅰ与以前的促生长因子A和C是完全相同的[2].
目录:
1 IGFs
2 IGFs与胎儿生长的关系
3 IGFs与IUGR
4 IGFs对IUGR的诊断和治疗作用
参考文献:
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