Fetal Response to Maternal Ascariasis as Evidenced by Anti Ascaris Lumbricoides IgM Antibodies in the Cord Blood

ABSTRACT. The immune response of the fetus to maternal infection with Ascaris lumbricoides was studied by estimating IgG and IgM antibodies, using ELISA, in 28 paired samples of mother and cord blood. A. lumbricoides adult male, cuticle and unembryonated egg antigen was used. Toxocara canis larva antigen was used as a specificity control. Presence of IgG in the cord blood does not signify fetal response, but the presence of IgM antibodies does. IgM antibodies to Ascaris adult male antigen were present in 27 out of 28 maternal sera and 1 out of 28 cord sera. All maternal sera and only 6 cord sera showed IgM antibodies against Ascaris cuticle and 20 out of 22 maternal sera and 8 out of 22 cord sera tested, showed IgM antibodies to Ascaris unembryonated egg antigen. Sixteen out of 22 maternal sera and none out of 22 cord sera showed IgM antibody against Toxocara canis antigen, ruling out cross reaction and transplacental leak. The results of our study suggest that the Ascaris infection can spread to the fetus and elicit immune response.     

新生儿缺氧缺血性脑病末梢血有核红细胞的变化

目的观察末梢血有核红细胞(MRBC)在新生儿缺氧缺血性脑病(HIE)时的变化及其意义。方法生后起进行末梢血涂片,计数HIE患儿末梢血NRBC情况及其消失时间,并与28例正常新生儿比较。结果HIE患儿末梢血NRBC数、NR- BC绝对计数明显高于正常组,且中、重度HIE患儿更为显著,NRBC消失时间延长。结论缺氧可导致新生儿末梢血NRBC增加,增加数量及消失时间均与缺氧程度有关。     

新生儿缺氧缺血性脑病血清镁变化的意义

目的探讨新生儿缺氧缺血性脑病(HIF)血清镁(Mg2 )水平及其与临床的关系。方法选择120例窒息并HIE 足月儿为观察组,按病情分为轻度、中度、重度HIE组;正常足月新生儿50例为对照组。用生化法测定生后48 h内血清镁。结果HIE组血清镁显著低于正常对照组(P<0.01),中度HIE组显著低于轻度HIE组(P<0.01),重度HIE组显著低于中度HIE组(P<0.01)。结论HIE患儿常并低镁血症,而血清镁与HIE程度呈正相关,HIE越重血清镁越低。     

胎儿宫内窘迫孕妇静脉血及脐血孤啡肽的变化

目的探讨宫内窘迫脐血孤啡肽(OFQ)的变化及其临床意义。方法采用放射免疫法测定30例正常妊娠妇女(对照组)及23例胎儿宫内窘迫孕妇(缺氧缺血组)静脉血及脐血OFQ的含量,同时行脐动脉血血气分析。结果1.缺氧缺血组脐血OFQ(23.46±6.72)ng/L,对照组为(13.29±4.14)ng/L,两组相比有显著差异(P<0.05)。2.脐动脉血血气分析,pH 为(7.00±0.15),p(O2)为(1.70±0.42)kPa,p(CO2)为(8.80±0.69)kPa;OFQ与脐血pH、p(O2)呈显著负相关(r= -0.418,-0.437 P均<0.05),与p(CO2)呈显著正相关(r=0.442 P<0.05)。3.缺氧缺血组及对照组母血浆OFQ含量分别为(9.23±3.01)ng/L及(8.57±2.83)ng/L,两组相比无显著差异(P>0.05).4.脐血OFQ含量与母血OFQ含量无显著相关(r=0.287 P>0.05)。结论OFQ与缺氧缺血导致的胎儿窘迫及新生儿窒息的发生发展密切相关。     

Pre-B Cells and B Lymphocytes in Human Cord Blood and Adult Peripheral Blood

The frequencies of pre-B cells and B lymphocytes subpopulations were studied in 43 cord blood and 21 adult peripheral blood samples using a direct immunofluorescence double staining method. We found pre-B cells in 40 out of 43 cord blood samples studied, a rate of 93%, and in 16 of 21 adult blood samples, a rate of 76%. The mean frequency of pre-B cells in cord blood lymphocytes was 0.7%, while that in adult blood lymphocytes was 0.2%. The pre-B cells in both groups were all small pre-B cells. The mean frequency of B lymphocytes in cord blood was 11.4%, higher than that in adult blood (5.4%). The difference in B lymphocyte frequency between cord blood and adult blood was exclusively due to high frequency of surface IgM-positive and IgD-positive B lymphocytes in the cord blood.     

脐血可溶性瘦素受体与胎儿生长发育关系探讨

目的：瘦素是肥胖基因的蛋白产物,除参与调节机体能量代谢外,与胎儿的生长发育密切相关,但其作用机制尚不清楚。本研究旨在探讨脐血可溶性瘦素受体与胎儿生长发育的关系及其可能机制。方法：67例足月新生儿根据出生体重分为小于胎龄儿(SGA)组23例,适于胎龄儿(AGA)组44例。采用ELISA法测定脐血和母血中瘦素及可溶性瘦素受体水平,并采用体脂含量估测新生儿营养状态。结果：①脐血可溶性瘦素受体水平与脐血瘦素水平及新生儿出生体重、体脂含量呈负相关(r分别为-0.405,-0.366,-0.356,P均0.05)。③SGA组脐血可溶性瘦素受体明显高于AGA组［(18.24±6.02) ng/ml vs (13.80±4.37) ng/ml］,P<0.01;而SGA组的瘦素含量低于AGA组［(6.79±4.59) ng/ml vs (16.30±11.62) ng/ml］,P<0.01。④脐血可溶性瘦素受体水平男性高于女性［(16.89±4.37) ng/ml vs (13.95±5.29) ng/ml］,P<0.05;而脐血瘦素水平则是男性低于女性［(10.28±8.28) ng/ml vs (15.70±12.11) ng/ml］,P<0.05。结论：可溶性瘦素受体可能通过对血清中游离瘦素水平的调节实现对胎儿生长发育的调控作用。同时测定瘦素和可溶性瘦素受体可能更有利于进一步了解瘦素的病理生理作用机制。     

The Effect of Glucocorticosteroids on the Neonatal Blood Count

ABSTRACT. To investigate the influence of glucocorticosteroid therapy on the neonatal blood count, the haematologic data of 68 preterm and term infants, who had received single dose of 1 mg dexamethasone i.v., were reviewed. White blood cell (WBC) count and platelet count increased after steroid therapy. The increase in WBCs was associated with an increase in the number of neutrophilic granulocytes, whereas the number of eosinophils decreased. We conclude that glucocorticosteroids alter the neonatal blood count and influence its value as diagnostic marker for bacterial infections.     

诱导脐血内皮祖细胞分化成内皮细胞的研究

目的探讨诱导脐血来源内皮祖细胞分化为内皮细胞,分析其用作组织工程心血管修复物种子细胞来源的可行性。方法采用6%羟乙基淀粉沉降法和密度梯度离心法联合应用分离脐血单个核细胞,在含有血管内皮生长因子(VEGF)等多种生长因子的培养液中培养扩增,通过形态学(光镜、电镜)、免疫荧光和流式细胞仪等技术对脐血来源内皮祖细胞分化的内皮细胞进行鉴定。结果从新鲜脐血中得到的单个核细胞数(3.4±2.1)×107/mL。贴壁细胞培养分化过程中形态发生改变,从小圆形变成梭形,最后分化成典型成熟内皮细胞的鹅卵石样形态,细胞数量可扩增达107。7 d后免疫荧光检测发现细胞表达内皮细胞特异性标志vWF和VEGFR-2。流式细胞仪分析单个核细胞经诱导分化后细胞表面表达CD133下降,从3.11%±1.05%下降至0.09%±0.02%。透射电镜观察到培养14 d的细胞胞浆中已出现典型的Weibel-Palade小体。结论脐血单个核细胞存在内皮祖细胞,并在体外可诱导分化为内皮细胞,初步具有用作构建组织工程心血管修复物种子细胞的可行性。     

黄芪注射液对多柔比星诱导的脐血间充质干细胞凋亡的影响

目的 探讨黄芪注射液对多柔比星(ADR)诱导的脐血间充质干细胞(UCB-MSCs)凋亡的影响.方法 收集2006年10月南华大学附属第一医院产科健康分娩的胎儿脐血,采用密度梯度与贴壁法相结合的方法 采集并分离和培养UCB-MSCs,连续5次传代纯化后,经流式细胞术检测其表面标志以鉴定纯度,加入ADR(10μg/L)诱导UCB-MSCs凋亡,同时分别加入低、中、高剂量黄芪注射液(4、40、400μg/L)与UCB-MSCs共培养24 h.实验共分6组,即空白对照组,ADR组,ADR加低、中、高剂量黄芪组(4、40、400 μg/L),黄芪对照组(400μg/L).采用TUNEL法和流式细胞仪检测细胞凋亡情况.结果 TUNEL法检测凋亡率黄芪对照组[(6.75±1.49)%]与空白对照组[(5.61±0.53)%]比较,无最著性差异(P>0.05);ADR组凋亡率[(39.42±2.21)%]显著高于空白对照组(P<0.01),经不同剂量黄芪注射液干预后,中、高剂量黄芪组凋亡率[(24.07±1.52)%,(22.85±2.21)%]比较无显著性差异(P>0.05),但较ADR组明显降低(P<0.05);低剂量黄芪组[(30.22±1.19)%]与ADR组比较变化不明显(P>0.05).流式细胞仪检测凋亡率黄芪对照组[(5.65±0.49)%]与空白对照组[(3.71±0.17)%]比较,无显著性差异(P>0.05);ADR组凋亡率[(40.42±2.28)%]明显高于空白对照组(P<0.01);中、高剂量黄芪组凋亡率[(23.07±1.12)%,(21.85±1.21)%]均显著低于ADR组(Pa <0.05).结论 黄芪具有明显抑制ADR诱导UCB-MSCs凋亡的作用,且无剂量依赖性.     

胎盘早剥早产儿脐血与产妇静脉血血管性血友病因子及其裂解酶水平的变化

目的观察胎盘早剥新生儿脐血与产妇静脉血血管性血友病因子(VWF)及血管性血友病因子裂解酶(ADAMTS13)水平变化,探讨胎盘早剥新生儿凝血功能异常的病理机制。方法北京军区总医院、北京妇产医院、北京市海淀医院产科2010年11月-2011年11月产科住院病人中,纳入发生胎盘早剥的产妇及新生儿作为胎盘早剥观察组(早剥组);非胎盘早剥观察组(非早剥组)为上述单位早剥组每例患者后2名产科入院患者,以办理入院登记时间为准。采集产妇的静脉血及新生儿脐静脉血、脐动脉血,并收集胎盘组织,用ELISA法检测其VWF、ADAMTS13水平。结果早剥组共纳入58例,非早剥组共纳入116例。根据非早剥组检测值计算出单侧95%参考值。产妇静脉血:VWF<857.80 U.L-1,ADAMTS13>119.63 U.L-1;脐静脉血:VWF<852.71 U.L-1,ADAMTS13>28.12 U.L-1;脐动脉血:VWF<1 416.96 U.L-1,ADAMTS13>147.90 U.L-1;胎盘组织VWF<760.66 U.L-1,ADAMTS13>27.53 U.L-1。早剥组各项VWF高于非早剥组(Pa<0.05);早剥组产妇血及脐血ADAMTS13水平均低于非早剥组(Pa<0.05)。结论胎盘早剥孕妇/产妇及胎儿/新生儿体内ADAMTS13水平随VWF水平的升高而下降,VWF是胎盘早剥发生时母儿高凝状态的因素之一,ADAMTS13具有保护作用。     

The Effect of Mode of Delivery on T Regulatory (Treg) Cells of Cord Blood

Objective  

To evaluate whether the mode of delivery (vaginal versus C-section) influences the levels of CD4+CD25+FOXP3+ Treg cells in cord blood and maternal peripheral blood and also to examine its relationship with plasma cortisol levels.