新生适于胎龄儿血清瘦素与骨声波传导速度的关系

目的探讨新生适于胎龄儿血清瘦素、骨声波传导速度(SOS)随胎龄的变化,以及瘦素与新生儿骨SOS的关系。方法共收集65例新生适于胎龄儿,根据胎龄分为早期早产儿组(胎龄31~34周,14例),晚期早产儿组(胎龄34~37周,13例),足月儿组(胎龄≥37周,38例)。所有研究对象均测量出生体质量、身长、小腿长度,采用Ponderal指数(PI)估测新生儿营养状态,采用weststrate公式(F%)估测新生儿体脂含量。生后7 d内采集静脉血测定血清瘦素水平,同时采用超声定量技术测量左侧胫骨SOS。结果三组新生儿胎龄、出生体质量、身长、小腿长度、F%、PI、血清瘦素与骨SOS的差异均有统计学意义(F=11.90~140.20,P均0.01);各变量均随胎龄增大而增大(P均0.05)。Pearson相关分析提示,除足月儿身长、PI外,三组新生儿的血清瘦素与其胎龄、出生体质量、身长、PI、F%呈显著正相关(r=0.36~0.78,P均0.05)。三组新生儿骨SOS分别与其瘦素、胎龄、出生体质量及小腿长度呈显著正相关(r=0.33~0.76,P均0.05)。进一步多元线性逐步回归分析发现,仅新生儿的胎龄(β=0.39,P=0.014)和出生体质量(β=0.44,P=0.006)对其骨SOS的影响具显著性。结论新生适于胎龄儿血清瘦素及骨SOS均与胎龄、出生体质量呈正相关,瘦素对骨SOS有影响,但不是其直接影响因素。     

骨定量超声技术在早产儿骨发育评价中应用和影响早产儿骨发育因素的研究

目的探讨定量超声(QUS)技术评价早产儿骨发育的作用及早产儿骨发育的影响因素。方法选取2009年2～7月本院NICU住院的早产儿为观察组,按2∶1比例随机选择同期出生的足月儿为对照组,用定量超声仪测量生后2d之内胫骨声波速度(SOS),同时检测出生24h内血钙、镁、磷和碱性磷酸酶,分析不同胎龄、体重、性别、母妊娠期高血压疾病及生化指标等因素对SOS值的影响,对有意义的因素进行多元回归分析。结果(1)胫骨SOS值早产儿低于足月儿;胎龄≤30周早产儿低于胎龄34～36周早产儿和足月儿,胎龄31～33周早产儿低于胎龄34～36周早产儿和足月儿;出生体重<1500g新生儿低于1500～2500g和>2500g的新生儿,P均<0.05;不同性别之间SOS值差异无统计学意义(P>0.05);早产适于胎龄儿低于早产小于胎龄儿,P<0.001;母妊娠期高血压疾病组早产儿高于非妊娠期高血压疾病组,P<0.05。(2)SOS值与胎龄(r=0.347,P<0.001)、母妊娠期高血压疾病(r=0.215,P=0.016)、宫内发育迟缓(r=0.367,P<0.001)、血钙(r=0.259,P=0.004)和血镁(r=0.234,...     

骨定量超声技术在早产儿骨发育评价中应用和影响早产儿骨发育因素的研究

目的 探讨定量超声(QUS)技术评价早产儿骨发育的作用及早产儿骨发育的影响因素.方法 选取2009年2～7月本院NICU住院的早产儿为观察组,按2:1比例随机选择同期出生的足月儿为对照组,用定量超声仪测量生后2 d之内胫骨声波速度(SOS),同时检测出生24 h内血钙、镁、磷和碱性磷酸酶,分析不同胎龄、体重、性别、母妊娠期高血压疾病及生化指标等因素对SOS值的影响,对有意义的因素进行多元回归分析.结果 (1)胫骨SOS值早产儿低于足月儿;胎龄≤30周早产儿低于胎龄34～36周早产儿和足月儿,胎龄31～33周早产儿低于胎龄34～36周早产儿和足月儿;出生体重<1500 g新生儿低于1500～2500 g和>2500 g的新生儿,P均<0.05;不同性别之间SOS值差异无统计学意义(P>0.05);早产适于胎龄儿低于早产小于胎龄儿,P<0.001:母妊娠期高血压疾病组早产儿高于非妊娠期高血压疾病组,P<0.05.(2)SOS值与胎龄(r=0.347,P<0.001)、母妊娠期高血压疾病(r=0.215,P=0.016)、宫内发育迟缓(r=0.367,P<0.001)、血钙(r=0.259,P=0.004)和血镁(r=0.234,P=0.008)正相关,与血磷(r=-0.201,P=0.025)负相关:多元回归分析发现胎龄、宫内发育迟缓和镁是影响SOS的重要因素(P<0.001).结论 QUS可以准确的评价胎儿骨营养状态,胎龄、宫内生长迟缓和镁是胎儿骨发育的重要影响因素.     

早产儿血清脂联素与骨密度的关系

目的 检测早产儿血清脂联素水平,探讨早产儿血清脂联素与骨密度的关系.方法 共选取72 例新生适于胎龄儿为研究对象,根据胎龄分为早期早产儿组(31~33+6 周,13 例)、晚期早产儿组(34~~36+6周,16 例)、足月儿组(37~42 周,43 例).生后1 周内采集静脉血测定血清脂联素水平;同时行超声定量技术测量左侧胫骨声波的传导速度(SOS)来评估骨密度.结果 早期早产儿组胫骨SOS 值低于晚期早产儿组和足月儿组,晚期早产儿组胫骨SOS 值低于足月儿组,差异均具有统计学意义(P<0.05).早期早产儿组血清脂联素水平低于晚期早产儿组和足月儿组,晚期早产儿组血清脂联素水平低于足月儿组,差异均具有统计学意义/(P<0.05).早产儿血清脂联素水平与胫骨SOS 值呈正相关(r=0.664,P<0.05).多元线性回归分析显示血清脂联素和出生体重是早产儿胫骨SOS 值的独立影响因素.结论 早产儿血清脂联素水平低于足月儿,与早产儿骨密度呈正相关.     

早产小于胎龄儿校正0～24月龄追赶生长的纵向研究

目的 了解早产小于胎龄儿（small for gestational age, SGA）和适于胎龄儿（appropriate for gestational age, AGA）校正0～24月龄期间生长发育状况和差异,为早产儿早期健康干预提供依据。方法 回顾性选取2019年7月—2022年7月在广州市妇女儿童医疗中心定期保健的824例早产儿作为研究对象,其中SGA 144例,AGA680例。分析和比较SGA组和AGA组出生及校正0～24月龄的体格发育数据。结果 SGA组在校正0～18月龄期间的体重和身长均落后于同月龄AGA组（P<0.05）,而校正24月龄时,两组的体重和身长比较差异无统计学意义（P>0.05）。校正24月龄时,85%(34/40) SGA早产儿和79%(74/94) AGA早产儿完成追赶生长。按胎龄分层分析的结果显示：胎龄<34周SGA亚组体重、身长在校正0～9月龄与胎龄<34周和≥34周AGA亚组比较差异有统计学意义（P<0.05）;胎龄≥34周SGA亚组体重、身长分别在校正0～18月龄和校正0～12月龄与胎龄<34周和≥34周AG...     

早产儿早期血脂代谢特点及与新生儿呼吸窘迫综合征关系探讨

目的：了解早产儿早期血脂代谢特点及其与新生儿呼吸窘迫综合征（RDS）的关系。方法：将100例适于胎龄早产儿按胎龄或出生体重分组,并以40例足月适于胎龄儿作为对照组,于出生后12 h内静脉采血,测定血浆总胆固醇（TC）、甘油三脂（TG）,低密度脂蛋白胆固醇（LDL-C）及高密度脂蛋白胆固醇（HDL-C）水平;另外,分别根据胎龄及出生体重进一步比较发生RDS与未发生RDS早产儿的血脂水平。结果：随胎龄及体重增加,TG水平呈递增趋势,28~30周组及31~33周组早产儿血浆TG水平均明显低于34~36周早产儿及足月儿（P<0.01）;出生体重≤1499 g组及1500~2499 g组早产儿血浆TG水平均明显低于出生体重≥2500 g早产儿及足月儿（P<0.05）,且出生体重≤1499 g组与1500~2499 g组早产儿之间TG水平差异亦有统计学意义（P<0.01）;而各组新生儿HDL-C、LDL-C及TC水平差异无统计学意义。RDS与非RDS早产儿血浆TC、LDL-C及HDL-C水平差异亦无统计学意义;但在胎龄28~30周组,RDS早产儿的TG水平比非RDS早产儿明显降低（P<0.05）;体重≤1499 g RDS早产儿TG水平低于非RDS早产儿（P<0.05）。结论：早产儿血脂水平与胎龄及体重相关,低TG水平可能是胎龄28~30周及体重≤1499 g早产儿出现RDS的原因之一。     

早产婴儿骨密度及其影响因素分析

目的：了解早产儿骨矿发育的情况及影响因素。方法：随机选取儿保门诊随访的早产儿与足月儿各90例,采用定量超声技术测量6月龄时（早产儿为纠正胎龄6月龄）的胫骨骨密度,结果以超声波声速度（SOS）值和Z值表示;同时采用回顾性问卷调查影响骨矿发育的相关因素。结果：足月儿6月龄的SOS值和Z值明显高于纠正胎龄6月龄的早产儿。在早产儿组中,不同出生体重、胎龄婴儿的SOS值和Z值,不同断母乳时间婴儿的SOS值差异有统计学意义（P<0.05）;早产儿女婴的Z值明显高于男性婴儿,差异有统计学意义(P<0.05)。多元线性回归分析显示,断母乳时间及每天户外活动时间是早产婴儿SOS值的影响因素。结论：适时断母乳或延长每天户外活动时间可能有利于促进早产婴儿骨矿发育。     

定量超声技术对婴儿出生时骨状况的研究

目的　评价定量超声(QUS)技术在新生儿中的应用,取得新生儿出生时骨QUS的基础资料。方法　采用以色列Sunlight公司生产的Omnisense定量超声仪,对 157例新生儿进行出生时胫骨声波速度(SOS)测量。结果　 ①男女婴儿之间SOS值差异无统计学意义 (男 88例,SOS值为2968±115m/s;女 69例,SOS值为 2956±105m/s;P=0. 524)。早产儿 (68例,平均胎龄 33 0±2. 5周)SOS值平均为 2935±96m/s,足月儿(89例, 平均胎龄 39. 4±1 3周)SOS值平均为 2984±116m/s,早产儿SOS值显著低于足月儿 (t=2 837,P=0. 005)。②不同季节出生的新生儿其SOS值差异有统计学意义(F=4.377,P=0 005);新生儿SOS值在春夏季出生者显著低于秋冬季出生者,夏季出生者比冬季出生者低 2 3%。③出生体重<1500g新生儿SOS值 (11例,SOS值为 2908±99m/s)显著低于出生体重>2500g新生儿(86例,SOS值为 2980±113m/s) (P=0 .042)。④在 109例适于胎龄儿中,SOS值与胎龄显著相关(r=0.270,P=0 .005),与出生体重也显著相关 (r=0. 232,P=0 015),多元回归分析发现胎龄和出生季节是影响SOS值的重要因素 (F=8 515.P<0. 001,校正决定系数R2 =0. 141)。结论　QUS适用于新生儿骨状况的研究;本研究取得了新生儿出生时骨SOS值的资料。     

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.     

早产儿校正24月龄内生长轨迹研究（英文翻译）

目的分析早产儿校正24 月龄内生长轨迹,以了解早产儿的生长趋势和规律。方法基于互联网+ 随访系统建立早产儿随访数据库,纳入2018 年4 月至2021 年4 月3 188 例早产儿,收集其出生及校正1、3、6、 12、18、24 月龄时的身长、体重、头围数据。按不同的围生期因素分组,绘制生长曲线,并与21 世纪国际胎儿和新生儿生长联合会（International Fetal and Newborn Growth Consortium for the 21st Century,INTERGROWTH-21st）标准和世界卫生组织（World Health Organization,WHO） 标准进行比较。结果按不同的围生期因素分组的各组早产儿体重、身长、头围曲线均在校正6 月龄内快速上升,校正6 月龄后增长速度减缓。按实际月龄比较,各出生胎龄组早产儿（<28 周、28~31⁺⁶周、32~33⁺⁶周、34~36⁺⁶周） 身长曲线在实际9 月龄后逐渐与WHO 曲线重合（P=0.082）,<32 周早产儿的体重和头围则一直落后于WHO 曲线（P<0.001）。校正月龄后,不同出生胎龄组早产儿（<28 周、28~31⁺⁶周、32~33⁺⁶周、34~36⁺⁶周） 的体格生长曲线基本重合（P>0.05）。超低出生体重儿和小于胎龄儿的身长、体重、头围曲线均低于INTERGROWTH-21st 标准和WHO 标准（P<0.05）。结论早产儿在校正6 月龄内体格增长速度较快,校正6 月龄后增长速度减缓。胎龄越小,体重和头围追赶的时间越长。应重点关注超早产儿、超低出生体重儿和小于胎龄儿的体格生长。     

Longitudinal measurements of bone status in preterm infants

BACKGROUND: Quantitative ultrasound measurement of the speed of sound (SOS) through bone has been investigated as a means of assessing bone status in preterm infants. Few studies report longitudinal measurements. OBJECTIVE: To assess longitudinal changes in bone SOS in preterm infants. METHODS: Sixty preterm infants with gestational ages of < 33 weeks and with birth weight appropriate for gestational age (AGA), and 48 healthy, term AGA infants were enrolled. SOS measurements of the tibia were made within the first week of life in the preterm infants, and within the first 72 hours of life in the term infants. During their hospital stay, weekly measurements of tibial SOS were made in 29 of the preterm infants, who were divided into three gestational age groups: Group 1: 24-26 weeks (n = 8), Group 2: 27-29 weeks (n = 9), and Group 3: 30-32 weeks (n = 12). RESULTS: The median SOS value for the 60 newborn preterm infants was significantly lower than that for the 48 newborn term infants (2,924 versus 3,036 m/sec, p < 0.001). At each time point, SOS values for each of the preterm infant gestational age groups were significantly lower than the term newborn infant SOS values. SOS values decreased significantly over time for the entire cohort of 29 preterm infants (p < 0.001), and for Groups 1 (p = 0.015) and 2 (p = 0.003). At several time points, there was a significant negative correlation between serum alkaline phosphatase levels and SOS values, and a significant positive correlation between serum phosphorus levels and SOS values. CONCLUSION: SOS measurements of the tibia decline during hospitalization in preterm infants, suggesting a progressive loss of bone strength. Longitudinal measurements of bone SOS in combination with serum alkaline phosphatase and serum phosphorus levels may identify infants at risk of developing osteopenia of prematurity.     

儿童急性淋巴细胞白血病化疗前后骨代谢研究

目的 　研究急性淋巴细胞白血病 (ALL)患儿化疗前后骨代谢状况。方法 　对 32例ALL患儿化疗前及化疗缓解后 3个月、1 2个月分别测定血清Ⅰ型胶原羧基端前肽 (PICP)、尿脱氧吡啶啉 (deoxypyridinoline ,DPD)排泄率并行骨骼X线检查 ,同期健康体检儿童 30例设为对照组。结果 　治疗前PICP及尿DPD排泄率较对照组增高 ,治疗后 3个月、1 2个月PICP较治疗前及对照组降低 ,尿DPD排泄率较治疗前下降 ,但仍高于对照组 ,经t检验 ,差异具有显著性 (P <0 0 1 )。结论 　ALL患儿治疗前存在骨质溶解 ,骨质吸收 ;化疗缓解后出现骨形成障碍 ,仍存在骨质吸收 ,可能与化疗药物应用有关。     

Quantitative bone US measurements in neonates and their mothers

Background  Factors that affect quantitative ultrasound (QUS) bone measurements have not been clearly defined for all clinical populations. Objective  To determine some technical and clinical aspects that may affect QUS bone measurement in the neonate–maternal dyad. Materials and methods  Speed of sound (SOS) was measured at the radius and tibia using a commercial multisite axial transmission QUS instrument and three manufacturer-provided probes (CS, CR and CM). Results  The study included 183 singleton neonates and 159 mothers. The type of probe, weight and edema significantly affected SOS measurements. In infants, the CS and CR probes measured SOS consistently at the tibia but not the radius. Gestational age was predictive of SOS from the CS probe and remained significant when race, gender, and birth weight were included. None of these parameters predicted SOS when using the CR probe. Maternal SOS at the radius and tibia was correlated with the CM probe. Maternal SOS was predicted by age but not by gravid status, number of living children, or race. There was no consistent correlation between maternal–infant dyad SOS measurements. Conclusions  Axial transmission SOS of bone varies with probe and site and is affected by technical and clinical factors. Valid data depend on documentation of the probes used and the clinical population studied.     

Bone ultrasound velocity of infants born small for gestational age

BACKGROUND: Quantitative ultrasound is increasingly used to assess bone status. Bone speed of sound (SOS), a biophysical property of bone, has been used to predict bone breakability. While decreased bone mineral content and delayed epiphyseal growth have been reported in small for gestational age (SGA) infants, there are no data on bone SOS in this group of infants. OBJECTIVE: To test the hypothesis that SGA infants have lower bone SOS than appropriate for gestational age (AGA) infants. METHODS: Bone SOS was measured within the first 96 hours of life at the right tibial midshaft in 22 singleton SGA infants. We compared these data with data obtained in 73 AGA controls. We used the Omnisense instrument which measures axially transmitted SOS. Infants ranged in gestational age (GA) from 25 to 42 weeks and in birth weight (BW) from 500 to 2,585 g. Statistical analyses included paired t-tests between the actual value obtained in every child and the theoretical, computed average normal value for GA, BW, or knee-sole length (KSL) based on our curves for AGA singletons. A p value < 0.05 was considered significant. RESULTS: Bone SOS measured in SGA infants was higher than the predicted computed average SOS of AGA singletons with significant differences in all of the parameters studied. CONCLUSIONS: Contrary to our hypothesis, SGA infants have higher bone SOS than AGA controls. Since bone mineral density is reported to be low in these infants, we speculate that intrauterine growth restriction may affect bone mineral density and bone protein matrix in opposite directions.     

Perinatal bone turnover in term human neonates and the influence of maternal smoking

Bone turnover in neonates appears independently of the comparably low maternal bone turnover, but there is only sparse information on the effect of the in utero environment on fetal bone turnover. Postnatally, the resuming growth velocity and alterations in mineral homeostasis affect neonatal bone turnover. This study evaluated the relationship of bone marker concentrations to maternal and fetal auxological variables as well as maternal smoking and assessed the short-term change in bone markers during the first days of life. Serum markers of bone formation [osteocalcin and bone-specific alkaline phosphatase (BALP)] and bone resorption (C-terminal telopeptide of type I collagen) were measured in cord blood and at discharge (median d 3) in 69 healthy term neonates. Concentrations of BALP were significantly lower in neonates of smokers (n = 16) compared with nonsmokers (n = 53), both at birth (p = 0.013) and at discharge (p = 0.036). Both cord osteocalcin and BALP were negatively related to maternal weight and maternal body mass index. Maternal smoking and pregnancy weight gain were the predictors of cord BALP (r2 = 0.24; p < 0.001), whereas the mode of delivery best predicted cord C-terminal telopeptide of type I collagen levels (r2 = 0.19; p < 0.001). C-terminal telopeptide of type I collagen and osteocalcin increased significantly (p < 0.001) from birth to discharge, whereas BALP levels did not change significantly during the same period. Our results suggest that maternal smoking during pregnancy and maternal obesity may have a negative impact on fetal bone formation. The significant increase of osteocalcin and C-terminal telopeptide of type I collagen may result either from an increase in bone turnover or altered renal clearance.     

Bone status and associated factors measured by quantitative ultrasound in preterm and full-term newborn infants

Background

A clear understanding of the factors associated with bone status in newborn infants is essential for devising strategies for preventing osteoporotic fracture in future generations.

Objective

The aims of this study were to perform bone speed of sound (SOS) to assess the status of the tibia in preterm and full-term newborns, and to evaluate factors associated with bone status at birth.

Study designs

Bone SOS was measured by quantitative ultrasonography on the left tibia in full-term and preterm newborn infants immediately after birth. A birth chart and maternal history were recorded. Univariate and multivariate analyses were performed to identify factors affecting bone SOS at birth.

Subjects

The study analyzed 667 infants, including 370 males and 297 females, during study period.

Results

Univariate analysis revealed that gender, gestational age (GA) and birth anthropometrics significantly affected tibial bone SOS at birth whereas maternal factors did not. Multivariate multiple regression analysis revealed that gender (male-to-female coefficient of 45.71 and 32.52 in premature and full-term infants, respectively), GA (coefficient of 32.55 and 31.27 in premature and full-term infants, respectively, for every 1-week increase), and birth weight (coefficient of − 0.11 and − 0.103 in premature and full-term infants, respectively, for every 1-gram increase) were important factors affecting tibial bone SOS in both preterm and full-term newborn infants at birth.

Conclusions

Male gender and advanced GA have a positive effect on increasing tibial bone SOS at birth, while birth weight had a negative effect on increasing tibial bone SOS. Tibial bone SOS is higher in small-for-gestational-age infants than in those of appropriate-for-gestational-age infants.     

Bone measurements of infants in the first 3 months of life by quantitative ultrasound: the influence of gestational age, season, and postnatal age

Background: There are a few quantitative ultrasound (QUS) studies of bone status for Chinese children. Objective: To evaluate the clinical application and to investigate the bone status of neonates and young infants with QUS. Materials and methods: An ultrasound bone sonometer was used to measure the bone speed of sound (SOS) of the tibia in 542 neonates within 3 months of birth. Results: At birth, no significant difference of SOS was found between boys and girls, but there was a significant difference of SOS between premature infants and full-term infants. The SOS in neonates born during spring and summer was significantly lower than those born during autumn and winter. There were significant correlations between SOS and gestational age, and between bone SOS and birth weight in appropriate for gestational age (AGA) infants. Multiple regression analysis found that gestational age and infant birth season were two important factors influencing SOS. During the first 3 months, there was no significant difference in SOS between sexes. The SOS of infants showed an inverse correlation with postnatal age, and the decrease of bone SOS with age in premature infants was more marked than in full-term infants. Conclusions: QUS is suitable for evaluating bone status in infants with high precision. The study offers some basic data for neonates and young infants.     

血管紧张素转化酶基因插入/缺失多态性及β3肾上腺素能受体基因Trp64Arg多态性对胎儿宫内发育及新生儿胰岛素敏感性的影响

目的 探讨血管紧张素转化酶(angiotensin converting enzyme,ACE)基因插入/缺失(insertion/deletion,I/D)多态性及B3-肾上腺素能受体(β3-adrenalgic receptor,β3-AR)基因Trp64Arg多态性对胎儿宫内发育和新牛儿胰岛素敏感性的影响.方法 将入选296例新生儿分为2组,适于胎龄儿组222例,小于胎龄儿组74例,于生后3d哺乳前检测血糖、胰岛素,计算HOMA-IR值评估胰岛素敏感性,应用PCR-RFLP方法分析β3-AR基因Trp64Arg多态性及ACE基因I/D多态性(202例),比较不同基因型组的孕周、出生体重、出生体重百分位及胰岛素敏感性,应用SPSS 10.0软件进行统计学处理.结果 小于胎龄儿组HOMA-IR值(Ln对数转换后)为0.217±0.367,高于适于胎龄儿组0.001±0.378,差异有统计学意义(P相似文献