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1、先天性心脏病与环境因素关系的研究进展广四医学2006年6月第28卷第6期学说认为GH对靶细胞有直接作用,同时刺激IGF-I在局部的合成和分泌,后者通过分泌和旁分泌的方式促进软骨细胞的增殖;(§)IGFBP调控学说认为GH刺激肝脏产牛IGF.I和IGFB/B,循环中IG]3调节IGF-I在靶细胞的生物利用度.综上所述,GH-IGF.I轴对新生儿的生长和代谢的调节具有重要意又.GH刺激外周组织尤是肝脏分泌IGF-I,后者介导了GH促生长的主要功能,GH亦直接作用于靶细胞发挥促牛长及调节代谢的作用.GHJGFBP和营养状态对IGF-I的调节起重要作用.在胎儿期GH及IGF-IJGF-II和瘦素
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