新生儿脐血脂联素水平的变化及其与生长激素、胰岛素的关系

目的探讨新生儿脐血脂联素(APN)水平与生长激素、胰岛素之间的关系。方法采用放射免疫法检测我院正常足月新生儿78例脐血APN、生长激素和胰岛素水平,其中小于胎龄儿(SGA)13例,适于胎龄儿(AGA)53例,大于胎龄儿(LGA) 12例,并按体质量指数(BMI)=体质量(kg)/身长2(m2)评估新生儿营养状态。结果新生儿脐血APN水平与BMI呈明显正相关(r=0.367 P<0.05);SGA(19.95±4.71)mg/L,AGA(24.81±4.15)mg/L,LGA(26.57±4.29)mg/L,三者之间有显著差异(F=16.65 P<0.05);与胰岛素水平呈显著正相关(r=0.453 P<0.05);与生长激素无明显相关性(r=0.072 P >0.05)。结论新生儿体内APN可能来源于自身脂肪组织,在一定程度上反映了新生儿的营养状态,它可能和胰岛素共同调节新生儿的生长发育。     

妊娠期高血压对脐血脂联素水平影响及其与胰岛素的关系

目的 探讨妊娠期高血压(妊高征,PIH)对胎儿脐血脂联素水平的影响及脂联素与胰岛素之间的关系.方法 妊高征母亲所生新生儿60例,分为3组:妊娠期高血压组(PIH 1)23例、子(癎)前期轻度组(PIH 2)22例、子(癎)前期重度组(PIH 3)15例,正常对照组40例,采用放射免疫分析法(RIA)测定脐血脂联素、胰岛素水平,并分析两者相关性.结果 ①PIH组脐血脂联素水平低于正常对照组,且随母亲PIH程度的加重呈进行性的下降,组间比较差异有统计学意义(P＜0.05);②PIH组脐血胰岛素水平低于正常对照组,且随母亲PIH程度的加重呈进行性的下降,组间比较差异无统计学意义(P＞0.05);③PIH组脐血脂联素水平与胰岛素水平呈正相关(r=0.293,P＜0.05).结论 妊高征时宫内不利环境影响胎儿内分泌代谢的调节,且随母亲妊高征程度的加重而加重.     

脐血脂联素、瘦素水平与胎儿发育的相关性

目的 探讨脐血脂联素、瘦素水平与胎儿生长发育的关系.方法 选择2006年10月至2007年10月在我院产科出生的新生儿86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,大于胎龄儿(LGA)组29例.胎儿娩出后立即断脐留脐血20ml,采用放射免疫分析法测定血清脂联素、瘦素水平,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)3组脐血瘦素和脂联素水平差异有统计学意义(P<0.001),LGA组明显高于AGA及SAG组(P<0.01);(2)脐血瘦素水平与体质量、胎龄、头围、身长、足长及胎盘重量呈正相关(P<0.01),脐血脂联素水平与出生体质量、头围、足长、BMI水平呈正相关(P<0.05).(3)脐血瘦素与脂联素水平呈显著正相关(P<0.01).(4)3组血脂水平比较差异无统计学意义;脐血脂联素、瘦素水平与血脂各指标间无明显相关性(P>0.05).结论 瘦素与脂联素在胎儿宫内生长和发育过程中起重要的调节作用.     

脐血脂联素、瘦素水平与胎儿发育的相关性

目的 探讨脐血脂联素、瘦素水平与胎儿生长发育的关系.方法 选择2006年10月至2007年10月在我院产科出生的新生儿86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,大于胎龄儿(LGA)组29例.胎儿娩出后立即断脐留脐血20ml,采用放射免疫分析法测定血清脂联素、瘦素水平,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)3组脐血瘦素和脂联素水平差异有统计学意义(P<0.001),LGA组明显高于AGA及SAG组(P<0.01);(2)脐血瘦素水平与体质量、胎龄、头围、身长、足长及胎盘重量呈正相关(P<0.01),脐血脂联素水平与出生体质量、头围、足长、BMI水平呈正相关(P<0.05).(3)脐血瘦素与脂联素水平呈显著正相关(P<0.01).(4)3组血脂水平比较差异无统计学意义;脐血脂联素、瘦素水平与血脂各指标间无明显相关性(P>0.05).结论 瘦素与脂联素在胎儿宫内生长和发育过程中起重要的调节作用.     

脐血脂联素、瘦素水平与胎儿发育的相关性

目的 探讨脐血脂联素、瘦素水平与胎儿生长发育的关系.方法 选择2006年10月至2007年10月在我院产科出生的新生儿86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,大于胎龄儿(LGA)组29例.胎儿娩出后立即断脐留脐血20ml,采用放射免疫分析法测定血清脂联素、瘦素水平,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)3组脐血瘦素和脂联素水平差异有统计学意义(P<0.001),LGA组明显高于AGA及SAG组(P<0.01);(2)脐血瘦素水平与体质量、胎龄、头围、身长、足长及胎盘重量呈正相关(P<0.01),脐血脂联素水平与出生体质量、头围、足长、BMI水平呈正相关(P<0.05).(3)脐血瘦素与脂联素水平呈显著正相关(P<0.01).(4)3组血脂水平比较差异无统计学意义;脐血脂联素、瘦素水平与血脂各指标间无明显相关性(P>0.05).结论 瘦素与脂联素在胎儿宫内生长和发育过程中起重要的调节作用.     

妊娠期高血压综合征对其新生儿脐血脂联素水平的影响及其与血脂的关系

目的 探讨妊娠高血压综合征(PIH)对PIH新生儿脐血脂联素水平的影响及其与血脂之间的关系.方法 将PIH孕妇所生新生儿60例分为妊娠期高血压组(23例)、子痫前期轻度组(22例)、子痫前期重度组(15例);取本院健康母亲所生新生儿40例为健康对照组.均采用放射免疫分析法(RIA)测定各组新生儿脐血脂联素水平,全自动生化分析仪测定其脐血血脂6项,并分析脂联素与血脂6项的相关性.结果 1.PIH孕妇所生新生儿脐血脂联素水平低于健康对照组,且随PIH程度的加重呈进行性下降,组间比较有显著性差异(Pa＜0.05).2.PIH孕妇所生新生儿脐血三酰甘油(TG)、总胆固醇(TC)、低密度脂蛋白(LDL)水平均高于健康对照组,且随母亲PIH程度的加重呈进行性升高,但组间比较无显著性差异(F=0.270,0.687,0.474 Pa＞0.05);高密度脂蛋白(HDL)、载脂蛋白A(apoA)水平均低于健康对照组,随母亲PIH程度的加重呈进行性的下降,但组间比较无显著性差异(F＝1.773、1.831 Pa＞0.05);脂蛋白(LPA)组间比较无显著性差异(F＝1.490 P＞0.05).3.PIH孕妇所生新生儿脐血脂联素水平与TG、TC、HDL、 LDL、apoA、LPA水平均无相关性(r＝-0.072,-0.089,0.053,-0.043,0.051,0.081 Pa＞0.05).结论 PIH时宫内的不良环境使胎儿内分泌代谢、脂代谢发生改变,且随母亲PIH程度的加重而加重,推测PIH母亲所生新生儿以后可能发生冠心病、动脉粥样硬化的危险性较健康儿童增加.     

足月新生儿脐血ghrelin水平与瘦素、生长激素水平关系研究

目的 探讨ghrelin调节胎儿生长发育的可能的作用机制.方法 采用放射免疫法测定78例足月新生儿脐血ghrelin、瘦素、生长激素水平,分析脐血ghrelin、瘦素、生长激素水平与出生体重的关系及脐血ghrelin水平与瘦素、生长激素水平间的关系.结果 小于胎龄儿(SGA)、适于胎龄儿(AGA)、大于胎龄儿(LGA)三组间新生儿脐血ghrelin、瘦素水平差异均有统计学意义(P均<0.01).脐血ghrelin水平与出生体重呈负相关性(r=-0.339,P=0.002),脐血瘦素水平与出生体重呈正相关性(r=0.373,P=0.001),脐血ghrelin水平与瘦素无相关性(P=0.175).脐血生长激素水平与出生体重、脐血ghrelin水平均无相关性(P=0.267,0.059).结论 Ghrelin及瘦素共同调节胎儿生长发育的机制可能与出生后两者的调节机制有所区别,Ghrelin可能并非通过刺激生长激素分泌而发挥调节胎儿生长发育作用.     

妊娠期高血压对新生儿脐血脂联素水平的影响

目的 探讨妊娠期高血压综合征(妊高征)对新生儿脐血脂联素水平的影响及脂联素与出生体质量、体质量指数(BMI)的关系.方法 选择妊高征母亲所生新生儿60例,分为3组:妊娠期高血压组23例、子癎前期轻度组22例、子癎前期重度组15例,健康对照组(孕母体健.除外高血压病、糖尿病、甲状腺功能亢进、心血管疾病等)40例.抽取其脐动脉血5 mL,常温3 000 r/min离心10 min,提取血清1 mL,置-80℃冰箱待测.严格测量新生儿出生净体质量,精确至1 g,身长精确至0.1 cm,计算BMI,BMI=体质量/身长2(kg/m2).放射免疫法测定各组脐血脂联素水平,并分析脂联素与出生体质量、BMI的相关性.采用SPSS 11.5软件进行统计学分析.结果 妊娠期高血压组、子痫前期轻度组、子癎前期重度组新生儿脐血脂联素水平、出生体质量、BMI均低于健康对照组,且随母亲妊高征程度的加重呈进行性下降,组间比较有显著性差异(F=3.984,6.262,2.772 Pa<0.05).妊高征组新生儿脐血脂联素水平与出生体质量、BMI呈显著正相关(r=0.320,0.338 Pa<0.01).结论 妊高征时宫内不利环境影响胎儿内分泌代谢的凋节,且随母亲妊高征程度的加重而加重;脂联素可以作为衡量胎儿生长发育状态的重要指标之一.     

大于胎龄儿脐血脂联素水平测定及其临床意义

目的探讨大于胎龄儿(LGA)血脂联素水平变化及其对新生儿的影响。方法研究对象为LGA和适于胎龄儿(AGA)各30例。应用酶联免疫吸附法(ELISA)测定脐血和产妇血脂联素水平,用免疫比浊法测定三酰甘油(TG)、总胆固醇(TCH)、低密度脂蛋白胆固醇(LDL-c)、高密度脂蛋白胆固醇(HDL-c)水平,并分析脐血脂联素水平与母血脂联素、新生儿性别、出生体质量、体质量指数(BMI)、胎盘重量和血脂水平的相关性。结果1.LGA脐血浆脂联素水平低于AGA,差异有非常显著性(P<0.01);LGA血TG、TCH、LDL-c、HDL-c水平与AGA比较差异均无显著性(Pa>0.05)。2.LGA血浆脂联素水平与新生儿出生体质量、BMI、胎盘重量、脐血TG水平均呈显著负相关(r=-0.848,-0.785,-0.835 Pa<0.001),与母血脂联素水平、新生儿身长、孕前和分娩时产妇体质量及其BMI、其他脐血脂成分无相关性(Pa>0.05)。3.LGA男婴和女婴脐血浆脂联素、血脂各成分水平比较差异均无显著性(Pa>0.05)。结论血脂联素水平变化与LGA的发生有关,测定脐血脂联素水平有助于判断LGA的发展趋势。     

新生儿血清脂联素水平变化及其临床意义

脂联素(adiponectin)是近年来发现的由脂肪细胞分泌的一种蛋白质类激素,是机体脂质代谢和血糖稳态调控网络中重要的调节因子,它通过内分泌、旁分泌和自分泌方式参与调节能量代谢。本研究采用放射免疫法测定新生儿血脂联素水平及其动态变化,探讨脂联素在胎儿、新生儿生长发育过程中     

足月新生儿脐血血清游离卡尼汀浓度及相关因素研究

目的了解足月新生儿脐血血清游离卡尼汀浓度及其相关影响因素。方法收集2004年11月至2005年2月出生的足月新生儿89例,男46例,女43例。平均胎龄(39.4±0.9)周,出生体重(3427.2±414.4)g,身长(49.8±2.5)cm,头围(34.8±1.4)cm,Apgar评分为8~10分。平产50例,剖宫产39例。于出生后即采集脐血2ml,用高效液相(HPLC)法测定脐血血清中卡尼汀浓度。结果89例正常新生儿平均脐血血清卡尼汀浓度为(52.2±22.9)μmol/L。其中男性组为(49.3±18.7)μmol/L,女性组为(55.3±26.5)μmol/L,两者之间差异无显著性(P=0.216);平产组为(52.4±24.5)μmol/L,剖宫产组为(51.9±20.9)μmol/L,两者之间差异无显著性(P=0.924)。根据新生儿出生体重分为<3000g(11例)、3000~3999g(68例)和≥4000g(10例)3组,其血清卡尼汀平均值分别为(61.5±26.2)μmol/L、(52.0±23.1)μmol/L和(42.8±12.3)μmol/L。脐血卡尼汀浓度与出生体重呈负相关(r=-0.239,P=0.026);与孕母年龄、新生儿胎龄、身长和头围无相关性。结论本组足月新生儿脐血血清卡尼汀浓度为(52.2±22.9)μmol/L,与新生儿出生体重呈负相关,与孕母年龄、新生儿胎龄、身长、头围、性别和分娩方式无相关性。     

Association between serum adipocytokine and cholesterol levels in cord blood

Background: Serum leptin and adiponectin levels are strongly associated with lipid metabolism in adults. These adipocytokines play a role in intrauterine and postnatal growth but the association between cord blood levels of these adipocytokines and cholesterol at birth remains unclear. Methods: The study involved 52 appropriate‐for‐gestational‐age (AGA) infants (25 male, 27 female, 37–41 weeks of gestational age) born at Keiai Hospital without any maternal complications. Cord blood concentrations of leptin, total adiponectin, total cholesterol (TC), low‐density lipoprotein cholesterol (LDL‐C), other neonatal characteristics, and maternal factors were assessed to investigate the association between cord blood leptin or adiponectin levels and cholesterol levels. Results: Cord blood leptin levels were significantly higher in girls. Simple regression analysis indicated that cord blood leptin levels were significantly associated with birthweight, gestational age, birthweight SD score, body mass index (BMI), ponderal index, LDL‐C, and TC; but total adiponectin levels were not significantly associated with any neonatal characteristics or maternal factors. A multiple regression analysis indicated that cord leptin levels were significantly associated with BMI (β= 0.407, P= 0.001), LDL‐C (β=?0.345, P= 0.004), and infant's gender (β=?0.332, P= 0.006); adiponectin levels were significantly associated with only gestational age (β= 0.279, P= 0.047). Conclusion: Cord leptin level is significantly associated with cord cholesterol level at birth, anthropometry, and infant gender. The present study suggests that cord blood leptin may be a key hormone for controlling fetal lipid metabolism.     

Cord serum adiponectin is positively related to postnatal body mass index gain

Background: The roles of adiponectin and leptin in the early stages of life are poorly understood. We previously studied longitudinal changes in these adipocytokines from birth to 12 months of age. The aim of this investigation was to evaluate the correlation between cord serum adipocytokine levels and postnatal growth by 3 years of age. Methods: A questionnaire was sent to obtain the general physical measurements of 3‐year‐olds from 56 healthy newborn infants born at a gestational age of 35 weeks or more; 45 valid responses were obtained. The correlations between variables, including cord serum adipocytokine levels at birth and general physical measurements at 3 years, were investigated. Results: Body mass index (BMI) Z‐score gain from birth to 3 years was negatively correlated with birthweight SD scores (β=?0.395, P= 0.019) and gestational age (β=?0.557, P= 0.016), and positively correlated with cord serum adiponectin levels (β= 0.253, P= 0.043). BMI Z‐score gain from birth to 6 months was negatively correlated with only birthweight SD score (β=?0.442, P= 0.017). Cord serum leptin levels were not a significant predictor of BMI Z‐scores gain in our subjects. BMI Z‐scores at 6 months, 12 months, and 3 years of age were not related to cord serum adiponectin or leptin levels. Conclusions: Birthweight SD score, gestational age, and cord serum adiponectin levels are significant predictors of BMI Z‐score gain from birth to 3 years of age in Japanese infants.     

缺氧缺血性脑病新生儿脂联素、胰岛素样生长因子-1的变化

目的探讨缺氧缺血性脑病(HIE)新生儿血清胰岛素样生长因子-1(IGF-1)、脂联素(APN)水平的变化。方法选择足月HIE新生儿52例(重度HIE组15例,中度HIE组20例,轻度HIE组17例),测定脐血及生后3~5 d(HIE急性期)、10~14 d(HIE恢复期)的血清IGF-1、APN水平;另选同期出生的20例足月健康新生儿作为对照组。结果轻、中、重度HIE组及对照组四组间脐血及生后3~5 d时APN、IGF-1水平的差异有统计学意义(P均0.01),均随HIE程度加重而下降,两两比较差异有统计学意义(P均0.05);HIE恢复期新生儿APN、IGF-1水平显著增加,但APN水平中度HIE组和重度HIE组仍低于对照组,差异有统计学意义(P均0.05);重度HIE组IGF-1仍低于对照组,差异有统计学意义(P0.05);HIE患儿脐血、急性期血清IGF-1、APN水平呈显著正相关(r=0.53、0.61,P均0.01)。结论 HIE患儿血清IGF-1、APN水平降低与HIE的病理生理过程密切相关,可作为病情程度的判断指标之一,对临床诊断及预后的判断具有指导意义。     

宫内发育迟缓儿脐血内脂素及胎盘内脂素mRNA的表达

目的探讨内脂素与胎儿生长发育的关系。方法选择2008年12月—2010年6月足月出生的宫内发育迟缓(IUGR)儿、巨大儿及正常足月儿各35例,采用ELISA法测定脐血内脂素水平,Real-time PCR法检测胎盘内脂素mRNA相对含量,放射免疫法测定脐血胰岛素水平;分析脐血内脂素、胰岛素水平、胎盘内脂素mRNA相对含量与出生体质量的关系及脐血内脂素、胰岛素水平与胎盘内脂素mRNA相对含量间的关系。结果 IUGR儿脐血内脂素水平高于巨大儿及正常足月儿,差异有统计学意义(P<0.05);巨大儿与正常足月儿之间脐血内脂素水平差异无统计学意义(P>0.05)。三组间新生儿脐血胰岛素水平差异有统计学意义(P<0.05)。脐血内脂素水平与出生体质量呈负相关性(r=-0.341,P<0.05),与胰岛素水平无相关性(P>0.05)。三组间胎盘内脂素mRNA表达差异无统计学意义(P>0.05),胎盘内脂素mRNA水平与出生体质量、脐血内脂素、胰岛素水平均无相关性(P>0.05)。结论新生儿期内脂素与IUGR有关,可通过调节代谢而影响胎儿宫内的生长发育。     

新生儿脐血瘦素水平测定及相关因素分析

目的测定脐血瘦素(leptin)水平并分析其相关因素,以探讨瘦素在胎儿生长发育中的作用.方法采用放射免疫法测定80例新生儿脐血瘦素水平,其中早产儿16例,足月儿64例.足月儿又分为小于胎龄儿11例,适于胎龄儿31例,大于胎龄儿22例.结果早产儿瘦素水平明显低于足月儿(4.25±3.19ng/mlvs9.86±5.50ng/ml,P＜0.001),足月儿中适于胎龄儿瘦素水平(8.91±5.20ng/ml)显著高于小于胎龄儿(5.17±2.46ng/ml)而低于大于胎龄儿(13.56±4.67ng/ml);脐血瘦素与胎龄、出生体重、身长、Kaup指数、头围、胎盘重量、脐血胰岛素、血脂等呈正相关关系;多元逐步回归分析表明体重、性别、胎龄是脐血瘦素的主要相关因素.结论各组新生儿瘦素水平有显著差异,体重、性别、胎龄是其主要相关因素,故瘦素对胎儿生长发育起着重要作用,是胎儿宫内生长发育的重要调控因子.     

Relationship between serum leptin and thyroid hormones in children

BACKGROUND: Because leptin decreases food intake and increases energy expenditure, the possible influence of thyroid status on the leptin system has been investigated mainly in adults and animals. However, the data available at present are very confusing. The aim of the present study was to assess the possible interaction of thyroid hormones with the leptin system. METHODS: Serum free thyroxine (FT4), a biologically active thyroid hormone, and thyroid stimulating hormone (TSH), a sensitive and reliable index of thyroid status, were examined in 51 children (19 males, 32 females) with mass screening-detected congenital hypothyroidism on continuous L-thyroxine (L-T4) substitution therapy. The subjects were divided into younger (n = 35, aged 1 month-5 years) and older (n = 16, 6 years-11 years) children groups. Serum levels of leptin and thyroid hormones were measured in the subjects. Body mass index (BMI) was estimated by the formula bodyweight (kg)/height x height (m2), which is known as the Kaup index in younger children and BMI in older children and adults. RESULTS: In the younger children group, serum leptin levels showed no correlation with serum TSH, FT4 or T4. In the older children group, serum leptin concentrations significantly correlated with T4 (r = 0.510, P < 0.05) and BMI (n = 16, r = 0.647, P < 0.01), but not with TSH or FT4. CONCLUSION: The role of thyroid hormones in modulating leptin synthesis and secretion seems to have little, if any, clinical or biological relevance.