宫内发育迟缓与胰岛素样生长因子及其结合蛋白关系研究

为了解脐血中胰岛素样生长因子_I(IGF -I)、胰岛素样生长因子结合蛋白_3(IGFBP_3)的水平变化与胎儿期生长的关系 ,将86例新生儿脐血标本分为宫内发育迟缓 (IUGR ,即小于胎龄儿 )组 (22例 )及适于胎龄儿 (AGA)组 (64例 )两组 ,采用竞争性放射免疫分析法 (RIA)测定IGF_1水平、非竞争性免疫放射分析法 (IRMA)测定IGF BP_3水平。结果显示 ,与AGA组相比 ,IUGR组脐血中IGF_1和IGFBP_3水平显著降低 (P均<0.01) ;IGF_1、IGFBP_3水平均随胎龄及出生体重增加而增加 (P均<0.01) ;IGFBP_3与IGF_1呈正相关 (P<0.01)。提示IUGR与IGF_1及其结合蛋白降低密切相关 ;脐血中IGF_1、IGFBP_3水平与胎龄及出生体重呈正相关     

脐血IGF-1及IGFBP-3与胎儿生长发育的关系研究

目的探讨胰岛素样生长因子-1（IGF—1）及胰岛素样生长因子结合蛋白-2（IGFBP-3）与胎儿宫内生长发育的关系。方法将新生儿根据出生体重与胎龄的关系分为大于胎龄儿（IAG）、适于胎龄儿（AGA）、小于胎龄儿（SGA）三组，分别测定三组新生儿出生时身长、体重及胎盘重量，同时取脐血采用EUSA法测定IGF-1及IGFBP-3水平。结果①三组新生儿出生时身长、体重及胎盘重量3个指标比较差异均有统计学意义（P均〈0．05）。②脐血IGF-1及IGFBP-3水平在SGA、AGA、LGA三组间比较，LGA组〉AGA组〉SGA组，各组间比较差异均有统计学意义（P均〈0.05）。③胎儿发育的重要指标出生体重、身长及胎盘重量与IGF-1及IGFBP-3水平均呈正相关。结论IGF-1及IGFBP-3与胎儿生长发育密切相关，对胎儿的生长发育起重要的调节作用。     

IGF-1、IGFBP-3与极低出生体质量儿生后早期生长发育的关系

目的探讨胰岛素样生长因子1(IGF-1)、胰岛素样生长因子结合蛋白3(IGFBP-3)与早产极低出生体质量儿(VLBW)生后早期生长的关系。方法根据胎龄和出生体质量,将32例VLBW新生儿分为小于胎龄儿(SGA)组和适于胎龄儿(AGA)组,给予相同的营养摄入量,监测两组出生时和生后第7、14、28天时的体质量、身长、头围和体质指数(BMI),并用放射免疫分析法检测相应日龄的血清IGF-1、IGFBP-3水平,计算IGF-1/IGFBP-3摩尔比率。结果两组VLBW新生儿在出生时及生后第7、14天的体质量、身长、头围、BMI差异均无统计学意义;至生后第28天时,SGA组的体质量、BMI均低于AGA组,差异有统计学意义(P0.05)。SGA组IGF-1、IGFBP-3、IGF-1/IGFBP-3以及AGA组IGF-1/IGFBP-3出生后随日龄变化的差异无统计学意义(P均0.05);但AGA组的IGF-1、IGFBP-3水平随日龄增长而升高,IGF-1于生后第14、28天时高于出生时水平,而IGFBP-3于生后第28天时高于出生时水平,差异有统计学意义(P均0.05)。生后第28天,SGA组IGF-1、IGFBP-3均低于AGA组,差异有统计学意义(P0.05)。结论 SGA新生儿的IGF-1、IGFBP-3水平低于AGA,低水平的IGF-1、IGFBP-3可能会导致生长迟缓。     

母血及脐血IGF-1、C肽和IGFBP-1质量浓度与新生儿出生体重的关系

目的探讨母体和脐血血清胰岛素样生长因子-1(IGF-1)、C肽(CP)及胰岛素样生长因子结合蛋白-1(IGFBP-1)质量浓度对新生儿出生体重的影响.方法选择12例大于胎龄儿(LGA)、15例适于胎龄儿(AGA)和20例小于胎龄儿(SGA),分为3组,分别抽取脐血和其母外周静脉血,分离血清.采用ELISA法测定IGF-1、CP和IGFBP-1.结果 (1)LGA组脐血IGF-1、CP、IGFBP-1质量浓度(ng·mL-1)分别为59.76±14.50,1.36±0.58,53.78±19.67;AGA组为33.65±12.74,0.90±0.45,104.79±27.60;SGA组为17.05±8.10,0.52±0.22,169.21±55.30;3组间差异有显著性意义(P<0.01).(2)LGA组新生儿母亲血清IGF-1、CP、IGFBP-1质量浓度(ng·mL-1)分别为267.15±99.43,2.84±0.93,158.50±51.25;AGA组母亲分别为237.34±105.56,2.71±0.72,170.78±63.69;SGA组分别为229.53±94.17,2.59±0.83,188.90±74.04;3组间比较差异均无显著性.但同组患儿母血IGF-1、CP及IGFBP-1均显著高于脐血水平(除SGA组母血与脐血IGFBP-1差异无显著性外).(3)新生儿出生体重与脐血IGF-1、CP呈正相关(r分别为0.814、0.654,P<0.01);与IGFBP-1呈负相关(r=-0.759,P<0.01);而与母血IGF-1、CP及IGFBP-1无明显相关性.结论脐血IGF-1、CP及IGFBP-1与胎儿生长关系密切.营养物质-胰岛素-胰岛素样生长因子轴是调节胎儿宫内生长发育的重要因素.     

新生儿血清瘦素、生长激素、胰岛素样生长因子-1、胰岛素样生长因子结合蛋白-3水平与宫内发育的关系

目的 探讨瘦素(leptin)、生长激素(GH)、胰岛素样生长因子-1(IGF-1)、胰岛素样生长因子结合蛋白-3(IGFBP-3)在不同宫内发育状况胎儿中的变化,及对胎儿生长发育调控的作用.方法 2004年1月-2006年6月出生早产小于胎龄儿(A组)30例,早产适于胎龄儿(B组)36例,足月小于胎龄儿(C组)32例,足月适于胎龄儿(D组)37例.生后24 h内抽取患儿静脉血,用放射免疫法(RIA)检测其血清leptin、GH、IGF-1、IGFBP-3水平,组间比较采用及多元回归相关分析.结果 各组新生儿血清leptin、GH、IGF-1、IGFBP-3水平均存在明显差异(Pa<0.05,0.01),各指标基本呈C、A、B、D组次序由低到高,但A组IGF-1与C组差异无统计学意义(P>0.05);在A、B和C组,出生体质量与leptin、IGF-1、IGFBP-3呈正相关(Pa<0.01),而D组出生体质量与IGF-1呈正相关(P<0.01),与其他激素无相关性.结论 leptin、IGF-1、IGFBP-3参与宫内发育迟缓儿和早产儿宫内生长发育的调控.IGF-1在早产适于胎龄儿的宫内生长发育中也起调控作用,而leptin、GH、IGFBP-3均不是足月适于胎龄儿生长发育的主要调节因素.     

脂联素、瘦素及胰岛素样生长因子-Ⅰ在胎儿生长发育中的作用

目的探讨脂联素、瘦素及胰岛素样生长因子-Ⅰ(IGF-Ⅰ)在胎儿生长发育中的作用。方法选择2006年10月-2007年10月在本院产科出生的新生儿86例。胎龄31~42周;男57例,女29例。根据不同出生体质量分为小于胎龄儿(SGA)组(16例),适于胎龄儿(AGA)组(41例)及大于胎龄儿(LGA)组(29例)。胎儿娩出后立即断脐留脐血20 mL,采用放射免疫分析法测定血清脂联素、瘦素及IGF-Ⅰ水平,同时检测其血脂水平,测量新生儿生长参数,计算体质量指数(BMI)。结果1.新生儿脐血瘦素、脂联素及IGF-Ⅰ水平无显著性别差异。2.脐血瘦素水平在SGA、AGA、LGA3组间有显著差异(P<0.001),LGA组显著高于AGA及SAG组(P<0.01,0.001);脐血瘦素水平与体质量、胎龄、头围、身长、足长及胎盘质量均呈显著正相关(Pa<0.01)。3.脐血脂联素水平与出生体质量、头围、足长、BMI水平均呈显著正相关(Pa<0.05)。脐血脂联素水平在SGA、AGA、LGA3组间有显著差异(P<0.001),LGA组高于AGA及SAG组(Pa<0.01)。4.LGA组脐血IGF-Ⅰ水平显著高于AGA及SAG组,3组间有明显差异(P<0.001);脐血IGF-Ⅰ水平与体质量、头围、身长、足长及胎盘质量均呈显著正相关(Pa<0.01)。5.脐血瘦素与脂联素、IGF-Ⅰ水平呈显著正相关(Pa<0.01),脐血脂联素与IGF-Ⅰ水平无明显相关关系(P>0.05)。6.SGA、AGA、LGA3组血脂水平比较无显著差异(Pa>0.05)。脐血IGF-Ⅰ水平与三酰甘油水平呈明显负相关(P<0.05),脐血脂联素、瘦素水平与血脂各指标间均无明显相关性(Pa>0.05)。结论瘦素与脂联素、IGF-Ⅰ在胎儿宫内生长和发育过程中起重要的调节作用,可作为评价胎儿生长发育及营养状态的临床指标之一。     

非糖尿病母亲母血及其大于胎龄儿脐血中IGF-Ⅰ、IGF-Ⅱ和IGFBP-3水平探讨

胎儿生长发育机制目前尚不完全清楚,营养物质(葡萄糖)-胰岛素-胰岛素样生长因子代谢轴可能是调节胎儿和生后早期生长的中心环节[1]。本研究选择健康孕产妇分娩的大于胎龄儿(newborns large for gestational age,LGA)为研究对象,通过与正常适于胎龄儿(newborns appropri-ate for gestational age,AGA)比较,分析新生儿脐血和母血胰岛素样生长因子Ⅰ(IGF-Ⅰ)、胰岛素样生长因子Ⅱ(IGF-Ⅱ)和胰岛素样生长因子结合蛋白3(IGFBP-3)水平与胎儿生长过度的关系。对象和方法一、对象随机选取2002年6~12月在我院分娩的单胎足月(胎龄为37~41周)新…     

脐血瘦素、胰岛素样生长因子-Ⅰ与胎儿生长发育

目的 揭示脐血瘦素及胰岛素样生长因子-Ⅰ(IGF-Ⅰ)与胎儿生长发育的关系,探讨其在胎儿生长发育方面的相互作用及临床意义.方法 采用放射免疫法测定86例新生儿脐血瘦素、IGF-Ⅰ水平,根据胎龄及出生体重百分位数的关系分为:小于胎龄儿(SGA)组16例、适于胎龄儿(AGA)组41例及大于胎龄儿(LGA)组29例.同时测量新生儿的出生体重、身长、头围、足长、胎盘重量并计算体质指数(BMI).结果 ①脐血瘦素水平SGA组与AGA组间差异有统计学意义(P<0.05);脐血IGF-Ⅰ水平AGA与LGA组间差异有统计学意义(P<0.05).②脐血瘦素及IGF-Ⅰ水平分别与新生儿出生体重、身长、头围、足长、BMI及胎盘重量呈显著正相关(P<0.01),脐血瘦素与IGF-Ⅰ水平亦呈显著正相关(P<0.01).③脐血瘦素水平与新生儿性别及分娩方式间差异均无统计学意义(P>0.05);脐血IGF-Ⅰ水平与新生儿性别差异无统计学意义(P>0.05),与新生儿分娩方式差异有统计学意义(P<0.05).结论 脐血瘦素、IGF-Ⅰ在调节胎儿生长发育方面起着重要作用,参与胎儿的生长发育过程,可作为评价胎儿生长发育及营养状态的临床指标之一.脐血瘦素、IGF-Ⅰ水平异常可能是引起胎儿宫内生长迟缓和巨大儿发生的原因之一.     

新生儿及新生儿疾病

042790 宫内发育迟缓与胰岛素样生长因子及其结合蛋白关系研究／欧阳士香…∥临床儿科杂志.-2003,21(10).-650~652 86例新生儿脐血标本分为宫内发育迟缓组(IUGR)22例及适于胎龄儿(AGA)组64例,测定胰岛素样生长因子-I(IGF-I)及胰岛素样生长     

生长激素缺乏症患儿血清胰岛素样生长因子-1及其结合蛋白的变化

目的 研究血清胰岛素样生长因子1(IGF-1)、胰岛素样生长因子结合蛋白-3(IGFBP-3)浓度与生长激素缺乏症(GHD)患儿生长激素(GH)激发试验中血清GH峰值关系,为其代替GH激发试验提供依据。方法选择GHD患儿62例(男39例,女23例),为GHD组;60例健康儿童(男38例,女22例)为对照组。分别用放射免疫分析法(RIA)、免疫放射分析法(IRMA)检测两组血清IGF-1、IGFBP-3浓度,同时做GH激发试验,测定血清GH峰值,并比较其与IGF-1、IGFBP-3的关系。结果 GHD血清IGF-1、IGFBP-3均显著低于对照组(t=3.116、11.579 P均<0.01);GHD组血清IGF-1、IGFBP-3浓度与GH激发试验中GH峰值呈显著正相关(r=0.331、0.347 P均<0.01);GHD组血清IGF-1、IGFBP-3降低阳性率分别为97.58％、98.38％,与激发试验的阳性率(100％)比较无统计学意义(x~2=3.074、2.033 P均>0.05)。结论 血清IGF-1、IGFBP-3浓度的检测对诊断GHD有重要意义;检测血清IGF-1、IGFBP-3浓度可替代GH激发试验。     

Maternal and fetal serum insulin-like growth factor-I (IGF-I) IGF binding protein-3 (IGFBP-3), leptin levels and early postnatal growth in infants born asymmetrically small for gestational age

This study was planned to investigate the relationship between birth weight and insulin-like growth factor-I (IGF-I), IGF binding protein-3 (IGFBP-3), and leptin levels in neonates with normal growth (appropriate for gestational age: AGA) and retarded growth (small for gestational age: SGA); and to evaluate these growth factors' effects in early postnatal growth. All newborns were full-term: gestational age 3,841 weeks. Of 50 neonates, 25 were SGA. IGF-I, IGFBP-3 and leptin levels were measured in maternal serum and venous cord blood at birth and at 15 days of life of neonates using specific RIAs. Maternal serum leptin concentrations were significantly higher than cord blood leptin concentrations (p < 0.001). Maternal serum IGF-I, IGFBP-3 and leptin levels did not show correlations with birth weight. In contrast, there were significantly positive correlations between birth weight and venous cord blood IGF-I, IGFBP-3 and leptin levels (p < 0.001). In the SGA group, the newborns with a slow postnatal growth pattern had lower umbilical cord serum IGF-I levels compared with newborns with a normal growth pattern. A similar result was also found in the AGA group. Similar results were not found for serum leptin and IGFBP-3. In conclusion, cord blood IGF-I, IGFBP-3 and leptin levels play an important role in the regulation of fetal and neonatal growth. It is likely that IGF-I has a more important role than the other factors in early postnatal growth.     

左向右分流型先天性心脏病合并心力衰竭患儿血清IGF-1和IGFBP-3的变化及意义

目的：探讨左向右分流型先天性心脏病（先心病）合并心力衰竭（心衰）患儿血清胰岛素样生长因子-1（IGF-1）和胰岛素样生长因子结合蛋白-3(IGFBP-3)的变化及意义。方法：20例健康儿童（对照组）,20例无心脏基础疾病的心衰患儿（心衰组）,20例无心衰的左向右分流型先心病患儿（先心组）,30例伴心衰的左向右分流型先心病患儿（先心+心衰组）作为研究对象。对不同组别的血清IGF-1及IGFBP-3进行比较;并对先心+心衰组患儿按心功能Ⅱ、Ⅲ、Ⅳ级分为3个亚组,对其血清IGF-1、IGFBP-3及cTnI水平进行比较及相关性分析。结果：先心组血清IGF-1及IGFBP-3水平下降,与对照组比较差异有统计学意义(P<0.01)。先心+心衰组血清IGF-1水平明显下降,与对照组及先心组比较差异有统计学意义(分别P<0.01,P<0.05)。心衰组血清IGF-1及IGFBP-3水平明显增高,与其他各组比较差异有统计学意义(P<0.01)。先心+心衰组患儿按心功能分级比较的各亚组间随心功能下降血清IGF-1水平依次降低(P<0.01),且该组患儿血清IGF-1、IGFBP-3水平与血清cTnI水平呈负相关（分别r=-0.692、-0.530,P<0.05）。结论：血清IGF-1水平可作为左向右分流型先心病病情评估的客观指标及合并心衰的危险因素,这也为该类患儿使用外源性IGF-1治疗心衰提供了临床依据。     

Relationship of insulin-like growth factor-I, insulin-like growth factor binding protein-3, insulin, growth hormone in cord blood and maternal factors with birth height and birthweight

BACKGROUND: To determine whether the following factors are related to birthweight or birth height, we measured insulin-like growth factor (IGF)-I, insulin-like growth factor binding protein (IGFBP)-3, insulin and growth hormone (GH) levels in cord blood and also observed the relationship between birthweight, birth height and maternal factors. METHODS: One hundred and ninety-four cord bloods were collected, 106 from males and 88 from females. Three newborns were small for gestational age (SGA), 168 were appropriate (AGA) and 23 were large (LGA); 21 newborns were preterm and 172 were term. RESULTS: Levels of IGF-I and IGFBP-3, measured by enzyme-linked immunosorbent assay, were significantly lower in preterm babies (35.3 +/- 15.1 and 1025.6 +/- 562.8 ng/mL, respectively) than in term babies (61.6 +/- 39.5 and 1252.6 +/- 403.2 ng/mL, respectively; P < 0.01), but neither insulin nor GH levels, measured by radioimmunoassay, showed any significant difference between the two groups (P > 0.05). Among term babies, IGF-I and IGFBP-3 levels were significantly higher in the LGA group (96.1 +/- 34.1 and 1544.7 +/- 418.1 ng/mL, respectively) than in the AGA group (56.4 +/- 37.6 and 1212.8 +/- 383.4 ng/mL, respectively; P < 0.01). Levels of IGF-I and IGFBP-3 showed significant correlation with birthweight and length, respectively (P < 0.01), although GH and insulin levels did not (P > 0.05). There was a significant correlation between IGF-I and IGFBP-3 levels (P < 0.01, r = 0.64), but IGF-I and IGFBP-3 levels showed no relationship with GH or insulin levels. Birthweight correlated significantly with prepartum maternal weight, maternal weight gain and maternal height (P < 0.05), but birth length correlated significantly only with maternal height (P < 0.05). CONCLUSIONS: Our results suggest that fetal growth depends on fetal levels of IGF-I and IGFBP-3 and maternal factors, not on insulin or GH. Levels of IGF-I and IGFBP-3 may not be regulated by insulin alone, but by the complex interactions between several factors, such as insulin, GH and maternal factors.     

孤独症谱系障碍儿童的血清胰岛素样生长因子-1和胰岛素样生长因子结合蛋白-3水平研究北大核心CSCD

目的探讨孤独症谱系障碍(autism spectrum disorder,ASD)儿童的血清胰岛素样生长因子-1(insulin-like growth factor-1,IGF-1)和胰岛素样生长因子结合蛋白-3(insulin-like growth factor binding protein-3,IGFBP-3)水平及与孤独症核心症状之间的关系。方法前瞻性选取重庆市妇幼保健院门诊招募的150名2~7岁ASD儿童和165名年龄、性别相匹配的正常健康儿童为研究对象,采用孤独症行为量表和孤独症评定量表评估ASD儿童核心症状,采用化学发光法检测两组儿童血清IGF-1和IGFBP-3水平。结果ASD组儿童血清IGF-1水平低于对照组儿童(P<0.05)。重度ASD儿童血清IGF-1和IGFBP-3水平低于轻-中度ASD儿童(P<0.001),2~3岁ASD儿童血清IGF-1水平低于对照组儿童(P<0.05)。两组男童IGF-1水平均低于女童(P<0.05)。血清IGF-1、IGFBP-3水平与儿童孤独症评定量表总分呈负相关(分别r=-0.32、-0.40,均P<0.001)。结论儿童早期血清IGF-1降低可能与ASD疾病发展相关,血清IGF-1和IGFBP-3水平与ASD儿童核心症状具有一定关联。     

骨钙素、Ⅰ型前胶原羧基端前肽、胰岛素样生长因子-1及其相关激素与胎儿骨发育的关系

目的 探讨骨钙素(OC)、Ⅰ型前胶原羧基端前肽(PICP) 及胰岛素样生长因子.1(IGF.1)等激素水平与胎儿骨生长发育的关系.方法 选择本院2008年10月-2009年10月收治的新生儿80例.男41例,女39例;胎龄28～42周.根据不同出生体质量分为小于胎龄(SGA)儿组22例,适于胎龄(AGA)儿组36例及大于胎龄(LGA)儿组(22例).胎儿娩出后,胎盘娩出前抽取其脐静脉血6 mL,采用放射免疫分析法测定其血清OC、IGF.1及甲状旁腺激素水平,酶联免疫吸附法检测其脐血PICP水平;同时检测其血钙、磷、ALP水平,测量新生儿生长参数,计算体质量指数(BMI).结果 1.脐血OC水平在SGA儿组、AGA儿组、LGA儿组间比较差异有统计学意义(P=0.000),LGA儿组显著高于AGA儿及SAG儿组(P＜0.01,0.001);脐血OC水平与出生体质量、头围、BMI呈正相关(Pa＜0.05),与身长无明显相关性(P＞0.05).2.LGA儿组脐血IGF.1水平显著高于AGA儿及SAG儿组,3组间比较有统计学差异(P=0.002);脐血IGF.1水平与出生体质量、头围、BMI水平均呈正相关(Pa＜0.05),与身长无明显相关性(P＞0.05).3.AGA儿组、LGA儿组脐血PICP水平明显高于SGA儿组,但3组间无统计学差异(P=0.070).脐血PICP、PTH水平与生长参数各指标水平均无直线相关关系(Pa＞0.05),偏相关分析脐血PICP与出生体质量、头围、BMI均呈正相关(r=0.239、0.250、0.306,Pa<0.05).4.脐血OC水平与PICP、IGF.1水平均呈正相关(Pa＜0.05),OC、PICP与PTH、ALP水平之间均无明显相关(Pa＞0.05).5.3组脐血钙、血磷、ALP水平均无统计学差异(Pa＞0.05).结论 SGA儿低血清OC、PICP水平与骨形成活动下降相关,脐血OC、PICP及IGF.1可作为评价胎儿骨骼生长发育的临床指标之一.     

生长追赶宫内发育迟缓大鼠早期糖脂代谢及脂肪细胞功能的改变

目的：探讨生长追赶宫内发育迟缓(IUGR)大鼠早期糖脂代谢及脂肪细胞功能的改变。方法：母孕期饥饿法建立IUGR大鼠模型。禁食组仔鼠作为生长追赶IUGR模型组（IUGR组）,正常喂养仔鼠作为对照组（AGA组）。12周龄时检测血浆甘油三酯（TG）、胆固醇（TC）、低密度脂蛋白-C（LDL-C）、高密度脂蛋白-C（HDL-C）以及脂联素、促酰化刺激蛋白（ASP）的水平。隔日行糖耐量试验（OGTT）,检测血浆葡萄糖和胰岛素水平,计算胰岛素抵抗指数（IRI）。随后仔鼠断头处死,共聚焦显微镜下观察免疫荧光染色的成熟脂肪细胞中葡萄糖转运体-4（GLUT-4)的表达。结果：12周末时IUGR组大鼠体重、BMI显著高于AGA组（均P<0.01）,血TG、TC、LDL-C水平显著高于AGA组,HDL-C水平明显低于AGA组（P<0.05）。OGTT中IUGR组注射葡萄糖后各时间点血糖水平均高于AGA组（P<0.05）,IRI值亦显著增高（P<0.05）。与AGA组比较,IUGR组ASP水平明显升高(P<0.05）,而脂联素水平显著降低（P<0.05）。IUGR大鼠成熟脂肪组织中GLUT-4在基础状态和不同浓度胰岛素刺激下的表达水平与AGA组相比均明显降低（P<0.05）。结论：IUGR大鼠生后发生明显的生长追赶,12周时即存在高血脂、高血糖及胰岛素抵抗。脂肪细胞分泌功能的异常和脂肪组织GLUT-4表达水平的降低可能参与了生长追赶IUGR大鼠胰岛素抵抗的形成。     

Associations of IGF-I, IGFBP-1 and IGFBP-3 on intrauterine growth and early catch-up growth.

Fetal cord blood IGF-I, IGFBP-1 and IGFBP- 3 levels of appropriate-for-gestational-age (AGA) and intrauterine growth retardation (IUGR) babies are studied and followed up for 6-9 months, reevaluated for anthropometric measures and the effects of IGF-I, IGFBP-1 and IGFBP-3 on fetal growth and early catch-up growth is investigated. 23 AGA and 21 IUGR babies, totally 44 newborns, were included in the study protocol. IGF-I and IGFBP-3 levels were found to be high in AGAs with respect to IUGR babies and IGFBP-1 is found to be high in IUGR with respect to AGAs. IGF-I was significantly lower in IUGR babies without catch-up growth (group 2b) with respect to AGAs (group 1) and neonates with IUGR and catch-up growth (group 2a) and group 2a infants had higher IGF-I values than group 2b infants (p < 0.05). IGFBP-3 levels in group 1 were significantly higher than in the other two groups (p < 0.05), but not significantly different in group 2a with respect to group 2b (p > 0. 05). IGFBP-1 values showed no statistically significant difference with respect to the three different groups (p > 0.05). A good correlation was found between birth weight, postnatal weight and postnatal height and IGF-I and IGFBP-3 levels (p < 0.05) but not with IGFBP-1 levels. Aside from the height of the 3 groups of infants which were similar to each other after the follow-up period, IGF-I was significantly high in IUGR infants with catch-up growth with respect to IUGR infants without catch-up growth, indicating its importance in early catch-up growth of IUGR babies.     

Serum insulin-like growth factor-I (IGF-I), IGF-binding protein-3, and growth hormone levels in collodion babies: a case-control study

AIM: Because growth failure occurs in many collodion babies, we investigated serum growth hormone (GH), insulin-like growth factor-I (IGF-I) and IGF binding protein-3 (IGFBP-3) levels in collodion babies admitted to Gevher Nesibe Hospital, Kayseri, Turkey between 1999 and 2006. PATIENTS AND METHOD: The newborns diagnosed clinically as 'collodion baby' were included in the study group (group 1). Because collodion babies are usually born small for gestational age (SGA) and/or premature, a control group (group 2) was formed by selecting the first infant admitted immediately after each study infant who matched for gestational age (+/- 7 days) and birth weight (+/- 100 g). All infants' blood samples were collected within the first 2 h of life for measurements of serum GH, IGFBP-3 and IGF-I levels. RESULTS: Group 1 consisted of 23 collodion babies (13 males and 10 females) with gestational ages ranging from 32 to 42 weeks, and birth weights ranging from 1,300 to 3,600 g. Ten were born premature and 16 were SGA. Serum IGF-I and IGFBP-3 levels were lower but serum GH levels were higher in collodion babies than in controls. Birth weight was positively correlated with serum IGF-I (r = 0.310, p = 0.046) and IGFBP-3 (r = 0.389, p = 0.011) levels. Serum GH level was negatively correlated with birth weight (r = -0.376, p = 0.014), serum IGF-I (r = -0.567, p <0.001) and IGFBP-3 (r = -0.444, p = 0.003). CONCLUSION: Collodion babies had lower serum IGF-I and IGFBP-3 levels but higher serum GH levels than controls in the present case-control study. The underlying mechanism needs to be explored.