Influence of Pregnancy Spacing on Outcome of Pregnancy

To assess the significance of the length of time between two pregnancies on the outcome of the second we used information collected by the British Perinatal Mortality Survey of 1958. From questionnaires on the 16,994 singleton births in the first week of March 1958 and the 7,117 singleton stillbirths and neonatal deaths in March, April, and May 1958 we abstracted information on the date and outcome of any preceding pregnancy. The interpregnancy interval was taken as the length of time between this preceding pregnancy and the last menstrual period before the index pregnancy. The most important factors influencing pregnancy spacing were outcome of the preceding delivery, social class, and maternal age. When these variables had been taken into account we found that the length of interpregnancy interval had little effect on stillbirth rates. High neonatal death rates, however, occurred when interpregnancy intervals were less than six months (P <0·005), though longer intervals had no significant effects.     

Identification of Two Legionella pneumophila Effectors that Manipulate Host Phospholipids Biosynthesis

The intracellular pathogen Legionella pneumophila translocates a large number of effector proteins into host cells via the Icm/Dot type-IVB secretion system. Some of these effectors were shown to cause lethal effect on yeast growth. Here we characterized one such effector (LecE) and identified yeast suppressors that reduced its lethal effect. The LecE lethal effect was found to be suppressed by the over expression of the yeast protein Dgk1 a diacylglycerol (DAG) kinase enzyme and by a deletion of the gene encoding for Pah1 a phosphatidic acid (PA) phosphatase that counteracts the activity of Dgk1. Genetic analysis using yeast deletion mutants, strains expressing relevant yeast genes and point mutations constructed in the Dgk1 and Pah1 conserved domains indicated that LecE functions similarly to the Nem1-Spo7 phosphatase complex that activates Pah1 in yeast. In addition, by using relevant yeast genetic backgrounds we examined several L. pneumophila effectors expected to be involved in phospholipids biosynthesis and identified an effector (LpdA) that contains a phospholipase-D (PLD) domain which caused lethal effect only in a dgk1 deletion mutant of yeast. Additionally, LpdA was found to enhance the lethal effect of LecE in yeast cells, a phenomenon which was found to be dependent on its PLD activity. Furthermore, to determine whether LecE and LpdA affect the levels or distribution of DAG and PA in-vivo in mammalian cells, we utilized fluorescent DAG and PA biosensors and validated the notion that LecE and LpdA affect the in-vivo levels and distribution of DAG and PA, respectively. Finally, we examined the intracellular localization of both LecE and LpdA in human macrophages during L. pneumophila infection and found that both effectors are localized to the bacterial phagosome. Our results suggest that L. pneumophila utilize at least two effectors to manipulate important steps in phospholipids biosynthesis.     

妊娠期糖尿病与妊娠结局的临床分析

目的：探讨妊娠期糖尿病（GDM）对孕妇妊娠结局和胎儿健康的影响。方法：回顾性分析2009 年8 月～2012 年12 月在我院分娩的184 例GDM 患者及200 例健康孕妇的临床资料,并对两组孕妇的妊娠结局进行比较。结果：GDM 组妊高症35 例（19.0%）、羊水过多17 例（9.2%）、早产21 例（11.4%）、产后出血14 例（7.6%）、产褥感染12 例（6.5%）,发生率均显著高于对照组（P〈0.05）;GDM组中发生巨大儿48 例（26.1%）、新生儿低血糖31 例（16.8%）,与对照组比较均显著增高（P＜0.05）,而胎儿宫内窘迫的发生率（3.3%）也较对照组升高,但差异无统计学意义（P＞0.05）;GDM组剖宫产141 例（76.6%）,阴道产43 例（23.4%）,剖宫产比例较对照组显著升高（P〈0.05）。结论：GDM对孕妇的妊娠结局有不利影响,孕妇应加强孕期保健,规范治疗妊娠期糖尿病,减少各种并发症的发生。     

妊娠期糖尿病与妊娠结局的临床分析

目的:探讨妊娠期糖尿病(GDM)对孕妇妊娠结局和胎儿健康的影响。方法:回顾性分析2009年8月~2012年12月在我院分娩的184例GDM患者及200例健康孕妇的临床资料,并对两组孕妇的妊娠结局进行比较。结果:GDM组妊高症35例(19.0%)、羊水过多17例(9.2%)、早产21例(11.4%)、产后出血14例(7.6%)、产褥感染12例(6.5%),发生率均显著高于对照组(P0.05);GDM组中发生巨大儿48例(26.1%)、新生儿低血糖31例(16.8%),与对照组比较均显著增高(P0.05),而胎儿宫内窘迫的发生率(3.3%)也较对照组升高,但差异无统计学意义(P0.05);GDM组剖宫产141例(76.6%),阴道产43例(23.4%),剖宫产比例较对照组显著升高(P0.05)。结论:GDM对孕妇的妊娠结局有不利影响,孕妇应加强孕期保健,规范治疗妊娠期糖尿病,减少各种并发症的发生。     

不同类型妊娠高血压疾病对产妇妊娠结局的影响

目的:探讨不同类型妊娠高血压疾病(PIH)对产妇妊娠结局的影响。方法:选取2011年1月~2013年12月我妇产科院收治的妊娠期出现高血压症状的产妇106例为观察组,并选取同期正常孕产妇100例为对照组,根据诊断标准将观察组患者再分为PIH组(75例)、子痫前期组(21例)以及子痫组(10例),对比4组产妇的胎儿窘迫、胎盘早剥、早产、剖宫产、产后出血以及新生儿窒息的发生率。结果:观察组产妇的胎儿窘迫、胎盘早剥、早产、剖宫产、产后出血以及新生儿窒息的发生率明显高于对照组,差异有统计学意义(P0.05);妊娠期高血压组、子痫前期组、子痫组的胎儿窘迫、胎盘早剥、早产、剖宫产、产后出血以及新生儿窒息的发生率,依次升高,差别有统计学意义(P0.05)。结论:应正确认识到不同类型PIH对妊娠结局的影响以及其并发症的规律,做好预防措施,以减少不良妊娠结局的发生。     

孕妇孕期营养指导及体质量控制对妊娠结局的影响

目的:对孕妇进行孕期营养指导及体质量控制,探究其对妊娠结局的影响。方法:将2011年2月-2014年2月期间我院收治的孕产妇150例纳入本次研究,所有研究对象随机均衡分为研究组和对照组,每组各75例。对照组孕产妇仅行常规妇科检查,研究组孕产妇在医护人员指导下行孕期营养指导和体质量控制,比较两组分娩方式,妊娠过程状况及围产儿情况。结果:研究组剖宫产率为17.33%低于对照组的57.33%,组间差异存在统计学意义(P0.05)。研究组贫血、羊水过少、产后出血率均低于对照组,差异有统计学意义(P0.05)。研究组胎龄及巨大儿及胎儿窘迫率均低于对照组,差异有统计学意义(P0.05)。结论:孕产妇在孕期进行营养膳食指导,控制体质量在合理范围内,可以改善孕妇妊娠结局,降低妊娠过程中并发症发病率,提高围产儿状况,保证孕妇和婴儿健康。     

妊娠期高血压疾病发病危险因素及对妊娠结局的影响

目的:探讨妊娠期高血压疾病(HDCP)发病的危险因素及其对妊娠结局的影响,以期为HDCP的诊断和早期预防提供一定的临床依据。方法:选择2011年11月到2014年11月在我院接受治疗的120例HDCP患者,设为实验组,同期选择120例正常孕产妇作为对照组。自制调查问卷调查受试者的临床资料以及妊娠结局,分析HDCP的危险因素,对比观察两组妊娠结局的差异。结果:(1)单因素分析显示,HDCP发病的危险因素可能有:年龄、体质指数(BMI)、月收入、高血压家族史、孕期并发症、负面情绪、文化程度(均P0.05)。(2)进一步行多因素非条件Logistic回归分析显示,HDCP发病的危险因素有:BMI、高血压家族史、负面情绪及文化程度。(3)实验组患者胎儿窘迫、低体重儿、新生儿窒息、围产儿死亡及胎儿畸形的发生率均明显高于对照组,具有显著性差异(P0.05)。结论:导致HDCP发病的危险因素较多,主要有BMI、高血压家族史、负面情绪及文化程度等,这些因素极易导致不良妊娠结局。     

妊娠合并尖锐湿疣临床诊治分析及对妊娠结局的影响

目的:探讨妊娠合并尖锐湿疣的临床特点、治疗效果、复发情况及对妊娠结局的影响.方法:对71例妊娠合并尖锐湿疣(观察组)及86例非妊娠合并尖锐湿疣患者(对照组)采用二氧化碳激光进行治疗并对临床资料进行回顾性分析.结果:观察组疣体直径≥0.5 cm、疣体≥10个、合并念珠菌感染及合并2种及以上病原体感染的比例明显高于对照组,差异有统计学意义(P＜0.05,P＜0.01).观察组复发率明显高于对照组,差异有统计学意义(P＜0.01).观察组无不良妊娠结局发生,新生儿预后情况好.结论:二氧化碳激光治疗妊娠期尖锐湿疣安全有效,尖锐湿疣对妊娠结局及新生儿无明显影响.     

Pregnancy and Preeclampsia Affect Monocyte Subsets in Humans and Rats

Introduction

Both nonclassical and intermediate monocytes have been implicated in different inflammatory conditions. We hypothesized that these monocytes would increase during pregnancy, a condition associated with generalized activation of inflammatory responses and that they would increase even more during preeclampsia, in which inflammatory responses are further stimulated. In the present study we investigated changes in monocyte subsets during healthy pregnancy and preeclampsia in humans and rats.

Methods

Blood monocyte subsets of nonpregnant, preeclamptic and healthy pregnant women were identified with CD14 and CD16. In nonpregnant and pregnant rats, blood monocytes were identified with CD172a and CD43, as well as in rats infused with adenosine triphosphate (ATP), a pro-inflammatory stimulus known to induce preeclampsia-like symptoms. Total and CD206-positive macrophages were quantified in placentas of these animals.

Results

Lower percentages of classical monocytes were found in pregnant women (91%–[83–98%]) compared to nonpregnant women (94%–[90–98%]) and even less in preeclamptic patients (90%–[61–92%]). In contrast, the percentage of combined nonclassical/intermediate monocytes was higher in pregnant women (8.5%–[2.3–16.6%] vs. 5.6%–[1.9–9.5%]) and even higher in preeclamptic patients (9.9%–[7.8–38.7%]), which was caused by a selective increase of intermediate monocytes. In rats, we also found lower percentages of classical monocytes and higher percentages of nonclassical monocytes in pregnant versus nonpregnant rats. ATP infusion increased the percentage of nonclassical monocytes in pregnant rats even further but not in nonpregnant rats. These nonclassical monocytes showed a more activated phenotype in pregnant ATP-infused rats only. Mesometrial triangles of ATP-infused rats had less CD206-positive macrophages as compared to those of saline-infused rats.

Conclusion

The higher percentage of nonclassical/intermediate monocytes found in pregnancy and preeclampsia confirms their association with inflammatory responses. The observation that ATP stimulated numbers/activation of nonclassical monocytes in pregnant rats only, suggests that nonclassical monocytes are specifically altered in pregnancy and may play a role in the pathophysiology of preeclampsia.     

妊娠高血压疾病对妊娠结局的影响及防治对策探讨

目的：研究妊娠高血压疾病对妊娠结局的影响及防治对策讨论。方法：选择回顾性研究方法,选择2010年9月到2012年8月到我院的妊娠高血压患者60名作为观察组,并且同期选择60名正常妊娠妇女作为对照组,比较妊娠高血压患者的母体并发症（早产、胎盘早剥、产后出血）等及胎儿妊娠结局等情况与对照组的比较。结果：妊娠高血压患者不同程度对妊娠结局的影响不同P〈0．05,并且妊娠高血压患者的母体并发症与对新生儿的影响与对照组比较有差异P〈0．05,异常情况均较正常妊娠妇女要高。结论：妊娠高血压患者对妊娠结局的影响较为严重,对母婴危害严重,需积极预防。     

Parameters that Affect Macromolecular Self-Assembly of Prion Protein

Amyloidogenesis of prion protein (PrP) is closely associated with the pathobiology of prion diseases. To understand details on formation of PrP amyloids, we investigated various conditions that influence the process in vitro, using full length and truncated recombinant PrP. Disrupted agitation and fluctuated temperature resulted in prolongation of lag phase during PrP amyloid formation. With the same conditions and material for the assay, fluorescence microplate readers of different manufacturers, which are assumed to have incongruent level of mechanical performance, demonstrated variations for the length of lag phase and the level of fluorescence detection. Presence of preformed amyloid seeds accelerated PrP amyloid formation. Similarly, recombinant proteins of different species affected effectual generation of amyloids. This process was also influenced by the concentrations and truncation of recombinant PrP. By investigating several conditions to perform PrP amyloid formation assay, our study addresses the factors that determine how much and how rapidly PrP amyloids are formed.     

Gender and Age Interact to Affect Early Outcome after Intracerebral Hemorrhage

Background

Intracerebral hemorrhage (ICH) is a common and devastating form of cerebrovascular disease. In ICH, gender differences in outcomes remain relatively understudied but have been examined in other neurological emergencies. Further, a potential effect of age and gender on outcomes after ICH has not been explored. This study was designed to test the hypothesis that age and gender interact to modify neurological outcomes after ICH.

Methods

Adult patients admitted with spontaneous primary supratentorial ICH from July 2007 through April 2010 were assessed via retrospective analysis of an existing stroke database at Duke University. Univariate analysis of collected variables was used to compare gender and outcome. Unfavorable outcome was defined as discharge to hospice or death. Using multivariate regression, the combined effect of age and gender on outcome after ICH was analyzed.

Results

In this study population, women were younger (61.1+14.5 versus 65.8+17.3 years, p=0.03) and more likely to have a history of substance abuse (35% versus 8.9%, p<0.0001) compared to men. Multivariable models demonstrated that advancing age had a greater effect on predicting discharge outcome in women compared to men (p=0.02). For younger patients, female sex was protective; however, at ages greater than 60 years, female sex was a risk factor for discharge to hospice or death.

Conclusion

While independently associated with discharge to hospice or death after ICH, the interaction effect between gender and age demonstrated significantly stronger correlation with early outcome after ICH in a single center cohort. Prospective study is required to verify these findings.     

IVF-ET时影响胚胎着床率的因素分析

胚胎移植成功的标志性事件是胚胎着床。着床是一个高度协调的事件,影响胚胎着床的因素主要有胚胎质量和子宫内膜容受性两方面。     

347例妊娠期肝内胆汁淤积症羊水性状与妊娠结局的分析

目的:探讨妊娠期肝内胆汁淤积症(intrahepatic cholestasis of pregnancy ICP)羊水性状与妊娠结局的关系.方法:对我院2005年1月～2009年12月住院分娩的患者资料进行回顾分析,统计羊水污染率、新生儿窒息发生率、围产儿死亡率及剖宫产率等.结果:347例ICP中轻度278例,重度69例.羊水污染89例(Ⅰ级19例,Ⅱ级14例,Ⅲ级56例),羊水污染率为25.6％.重度ICP中羊水污染46例,发生率为66.7％.89例ICP羊水Ⅱ级及Ⅲ级病例中出现3例新生儿窒息.结论:ICP的羊水性状与病情程度基本一致,羊水污染预示着不良的妊娠结局,适时终止妊娠可降低围生儿病率.     

347例妊娠期肝内胆汁淤积症羊水性状与妊娠结局的分析

目的:探讨妊娠期肝内胆汁淤积症(intrahepatic cholestasis of pregnancy ICP)羊水性状与妊娠结局的关系。方法:对我院2005年1月～2009年12月住院分娩的患者资料进行回顾分析,统计羊水污染率、新生儿窒息发生率、围产儿死亡率及剖宫产率等。结果:347例ICP中轻度278例,重度69例。羊水污染89例(Ⅰ级19例,Ⅱ级14例,Ⅲ级56例),羊水污染率为25.6%。重度ICP中羊水污染46例,发生率为66.7%。89例ICP羊水Ⅱ级及Ⅲ级病例中出现3例新生儿窒息。结论:ICP的羊水性状与病情程度基本一致,羊水污染预示着不良的妊娠结局,适时终止妊娠可降低围生儿病率。     

Toxoplasma gondii: characterization of monoclonal antibodies that recognize rhoptries

We have previously reported on a series of monoclonal antibodies that recognize the rhoptries of Toxoplasma gondii and that interfere with the action of penetration enhancing factor. The antibodies immunoprecipitate several related antigens from [35S]methionine-labeled parasites that range in size from 60 to 43 kDa. By immunoblot, one of the antibodies reacts with the 60 kDa protein in the presence of protease inhibitors. Trypsin digestion of the antigen destroyed antigenic reactivity indicating that the 60 kDa antigen is a protein. The antigen was stable to periodate oxidation and failed to react with Schiff's reagent, indicating that the antigen contains little or no carbohydrate. Two-dimensional gel electrophoresis followed by immunoblot showed that the antigen recognized by Tg 49 was an acidic protein with an approximate pI of 5.8.     

96例妊娠期肝内胆汁淤积症患者的妊娠结局分析及护理对策

目的:探讨妊娠合并肝内胆汁淤积症(ICP)对妊娠结局的影响,并探索相对应的护理策略.方法:选取在我院治疗的ICP患者96例,根据ICP分度标准分为轻度与重度型,分别观察其妊娠.结果:重型组患者新生儿窒息、羊水污染、剖宫产的发生率都明显高于轻型组患者(P＜0.05);而两组围产儿死亡率和产后出血率相比,差异无显著性意义(P＞0.05).结论:ICP对孕妇妊娠结局具有重要的不良影响作用,针对其可能导致的不良妊娠结局采取针对性的护理策略具有重要的临床意义.     

Excessive Intrauterine Fluid Cause Aberrant Implantation and Pregnancy Outcome in Mice

The normal intrauterine fluid environment is essential for embryo implantation. In hydrosalpinx patients, the implantation and pregnancy rates are markedly decreased after IVF–embryo transfer, while salpingectomy could significantly improve the pregnancy rates. The leakage of hydrosalpinx fluid into the endometrial cavity was supposed to be the major cause for impaired fertility. However, the underlying mechanisms of hydrosalpinx fluids on implantation and ongoing pregnancy were not fully understood and remain controversial regarding its toxicity. In present study, by infusing different volume of non-toxic fluid (0.9% saline) into uterine lumen before embryo implantation in mice (Day4 08:30), we found that while the embryos were not “flushed out” from the uteri, the timing of implantation was deferred and normal intrauterine distribution (embryo spacing) was disrupted. The abnormal implantation at early pregnancy further lead to embryo growth retardation, miscarriage and increased pregnancy loss, which is similar to the adverse effects observed in hydrosalpinx patients undergoing IVF-ET. We further examined uterine receptivity related gene expression reported to be involved in human hydrosalpinx (Lif, Hoxa10, Integrin α(v) and β(3)). The results showed that expression of integrin α(v) and β(3) were increased in the fluid infused mouse uteri, implicating a compensatory effect to cope with the excessive fluid environment. Our data suggested that the adverse effects of excessive non-toxic luminal fluid on pregnancy are primarily due to the mechanical interference for normal timing and location of embryo apposition, which might be the major cause of decreased implantation rate in IVF-ET patients with hydrosalpinx.