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胰岛素样生长因子与胎儿宫内发育迟缓 2

来源:医学杂志 2006-08-14 20:13:34 

质量和IGFBP-1的水平存在负相关关系[14~16].限制胎鼠生长的研究[17]也显示高水平的IGFBP-1.也有IGFBP-1与胎儿大小无关的报道[18],但同时肯定了IGF-Ⅰ水平在SGA胎儿中明显低于AGA.然而,Holmes等[19]不支持胎儿IGF-Ⅰ缺乏是IUGR的原因,指出升高的结合蛋白可以使相应的游离IGF缺乏,而结合蛋白是受代谢环境的变化而改变的.Rutanen等[20]则认为蜕膜上的IGFBP-1可以抑制IGF-Ⅰ与IGF受体结合,从而抑制IGF的作用.在IUGR母体中,降低的IGF-Ⅰ和伴随升高的IGFBP-1可能在调节胎盘的转运中起重要作用.

  4 IGFs对IUGR的诊断和治疗作用

  孕晚期IUGR血浆中IGFBP-1水平与新生儿体质量呈负相关,但这时IUGR的临床表现也较明显,故对IGFBP-1检测只具有学术上的意义.Unterman等[17]对15~16wk孕妇羊水的IGFBP-1水平进行了测定,发现IGFBP-1对SGA诊断的敏感度为40%,特异度为84%.尽管单独检测IGFBP-1不足以作为诊断IUGR的方法,但如果联合其它的结合蛋白检测可能会有更好的结果.目前IGFs应用于IUGR的治疗还处于初步探索阶段,主要集中于动物器官促成熟的研究.临床上还未见报道.从实验学角度讲,母亲应用IGF-Ⅰ能够增强胎盘的功能,促进胎儿的生长,这给IUGR的宫内治疗提供了依据.

  作者简介:张惠琴,女,35岁,主治医师,产科副主任.现为第四军医大学陕西省卫生厅研究生课程班学员.导师辛晓燕.电话:(029)8704650

  作者单位:第四军医大学西京医院妇产科 陕西 西安 710033

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