目的探讨孕妇血清胰岛素样生长因子1(insulin like growth factor 1,IGF-1)、IGF-2、IGF结合蛋白3(IGF binding protein 3,IGFBP-3)与正常胎儿生长的关系。方法选择2010年1月至2011年5月于上海市浦东新区人民医院产前检查并分娩正常体...目的探讨孕妇血清胰岛素样生长因子1(insulin like growth factor 1,IGF-1)、IGF-2、IGF结合蛋白3(IGF binding protein 3,IGFBP-3)与正常胎儿生长的关系。方法选择2010年1月至2011年5月于上海市浦东新区人民医院产前检查并分娩正常体重儿的初产妇66例,分为妊娠16～18周、妊娠26～28周、妊娠37～40周3个阶段进行纵向观察,放射免疫法测定孕妇各阶段血清中IGF-1、IGF-2、IGFBP-3水平并进行对比分析。结果孕期母血IGF-1水平随着孕周增加明显上升,其中IGF-1水平在妊娠37～40周高于妊娠26～28周,妊娠26～28周高于妊娠16～18周,差异均有显著统计学意义(P均<0.01)。孕期母血IGF-2水平随孕周增加无明显改变,妊娠3阶段差异无统计学意义(P>0.05)。母血IGFBP-3水平妊娠37～40周高于妊娠26～28周及妊娠16～18周期,差异有统计学意义(P<0.05),而妊娠26～28周与妊娠16～18周无显著差异。妊娠16～18周、26～28周和37～40周3阶段母血IGF-1、IGF-2、IGFBP-3水平与正常新生儿出生体重无显著相关性。结论孕妇血清IGF-1、IGFBP-3水平与正常胎儿生长密切相关,IGF-1可作为临床评价不同阶段正常胎儿生长的指标,而IGFBP-3更多地反映了妊娠中晚期正常胎儿的生长。展开更多
Mechano-growth factor (MGF) is a stretch sensitive factor in myocytes, and it might also be produced by other mechanocytes under mechanical stimulation. In this study, both the mRNA and protein expression of MGF were ...Mechano-growth factor (MGF) is a stretch sensitive factor in myocytes, and it might also be produced by other mechanocytes under mechanical stimulation. In this study, both the mRNA and protein expression of MGF were detected in stretched osteoblasts. Quantitative analysis showed that a cyclic stretching stimulation caused a quick and sharp increase of MGF mRNA and protein expression from a low basal level under no stretch; the mRNA and protein levels respectively peaked in 6 and 12 h to 5 and 5.2 fold over the basal level and returned to normal by 24 h. The subcellular distribution of MGF protein was revealed by immunofluorescence analysis to be restricted to the nucleus. We concluded that cyclic stretching stimulation could induce MGF expression in osteoblasts in a pulsing fashion; and the nuclear distribution of MGF suggested that MGF might act in mechanocytes as an autocrine growth factor.展开更多
文摘目的检测特发性矮小症患儿血清25羟维生素D [25(OH)D]、胰岛素样生长因子-1 (IGF-1)水平,并探讨其与体质量的相关性,为患者的临床诊断提供指导。方法选取2017年1月至2019年6月期间广州市花都区妇幼保健院接诊的85例特发性矮小症患儿作为观察组,另选择同期在我院体检的50例儿童作为对照组。受检者入组后,空腹采集静脉血液标本,检测并比较两组患儿的25(OH)D、IGF-1水平、体质量和身高状况,并采用Spearman相关分析法分析25(OH)D、IGF-1、身高与体质量的相关性。结果观察组和对照组患儿的血清25(OH)D [(24.59±9.31) ng/mL vs (33.28±11.21) ng/mL]、IGF-1 [(237.16±37.33) ng/mL vs (309.35±71.52) ng/mL]、体质量[(15.67±2.01) kg/m2vs (18.42±1.65) kg/m2]、身高[(115.49±10.61) cm vs (138.35±10.09) cm]比较,观察组明显低于对照组,差异均具有统计学意义(P<0.05);观察组患儿的体质量与血清25(OH)D、IGF-1水平呈正相关(r=0.229、0.258,P<0.05),身高与血清25(OH)D、IGF-1水平也呈正相关(r=676、0.404,P<0.05)。结论特发性矮小症患儿血清25(OH)D、IGF-1水平均较低,且其与体质量和身高呈正相关,血清25(OH)D、IGF-1水平检测对特发性矮小症患儿的病情预测及防治都具有重要意义。
文摘目的探讨孕妇血清胰岛素样生长因子1(insulin like growth factor 1,IGF-1)、IGF-2、IGF结合蛋白3(IGF binding protein 3,IGFBP-3)与正常胎儿生长的关系。方法选择2010年1月至2011年5月于上海市浦东新区人民医院产前检查并分娩正常体重儿的初产妇66例,分为妊娠16～18周、妊娠26～28周、妊娠37～40周3个阶段进行纵向观察,放射免疫法测定孕妇各阶段血清中IGF-1、IGF-2、IGFBP-3水平并进行对比分析。结果孕期母血IGF-1水平随着孕周增加明显上升,其中IGF-1水平在妊娠37～40周高于妊娠26～28周,妊娠26～28周高于妊娠16～18周,差异均有显著统计学意义(P均<0.01)。孕期母血IGF-2水平随孕周增加无明显改变,妊娠3阶段差异无统计学意义(P>0.05)。母血IGFBP-3水平妊娠37～40周高于妊娠26～28周及妊娠16～18周期,差异有统计学意义(P<0.05),而妊娠26～28周与妊娠16～18周无显著差异。妊娠16～18周、26～28周和37～40周3阶段母血IGF-1、IGF-2、IGFBP-3水平与正常新生儿出生体重无显著相关性。结论孕妇血清IGF-1、IGFBP-3水平与正常胎儿生长密切相关,IGF-1可作为临床评价不同阶段正常胎儿生长的指标,而IGFBP-3更多地反映了妊娠中晚期正常胎儿的生长。
基金Supported by the National Natural Science Foundation of China (Grant Nos. 30870609 and 30600130)
文摘Mechano-growth factor (MGF) is a stretch sensitive factor in myocytes, and it might also be produced by other mechanocytes under mechanical stimulation. In this study, both the mRNA and protein expression of MGF were detected in stretched osteoblasts. Quantitative analysis showed that a cyclic stretching stimulation caused a quick and sharp increase of MGF mRNA and protein expression from a low basal level under no stretch; the mRNA and protein levels respectively peaked in 6 and 12 h to 5 and 5.2 fold over the basal level and returned to normal by 24 h. The subcellular distribution of MGF protein was revealed by immunofluorescence analysis to be restricted to the nucleus. We concluded that cyclic stretching stimulation could induce MGF expression in osteoblasts in a pulsing fashion; and the nuclear distribution of MGF suggested that MGF might act in mechanocytes as an autocrine growth factor.
