孕前、孕期医学量表测定综合分析对降低自然流产率及出生缺陷的效果评价

目的:评价孕前、孕期医学量表测定综合分析在降低自然流产率和出生缺陷中的效果。方法:选择怀孕的200对夫妇,将其随机分成两组,A组(100对)参加"孕前、孕期医学量表测定综合分析",B组(100对)未参加,随访1年,若怀孕继续随访至胎儿出生,观察2组的妊娠率、自然流产率和出生缺陷发生率。结果:A组妊娠率89.0%,自然流产率9.0%,B组妊娠率80.0%,自然流产率21.3%,组间妊娠率比较(P0.05),组间自然流产率比较差异具有统计学意义(P0.05)。A组出生缺陷发生率1.2%,B组出生缺陷发生率3.2%,组间比较差异无统计学意义(P0.05)。结论:孕前、孕期医学量表测定综合分析可降低自然流产率,值得进步应用。     

应用变性高效液相色谱筛查颅内静脉系统血栓形成AT-Ⅲ基因突变及多态性

目的 应用变性高效液相色谱(DHPLC)方法筛查生育期女性颅内静脉系统血栓形成(CVT)AT-Ⅲ基因的突变及多态性.方法 标本来自于2006年6月～2007年12月南方医院生育期女性CVT患者,及52例严格配伍的健康女性外周静脉血.提取所有受试者全血DNA.PCR扩增后应用变性高效液相色谱(DHPLC)技术分析抗凝血酶-Ⅲ(AT-Ⅲ)基因的启动子区,第1～6外显子及其侧翼序列的基因变异情况.结果 DHPLC技术分析发现病例组出现6种异常峰形,经测序证实1例致病突变为Exon6 G13328A的杂合突变,1例新发现的同义突变Exon4+243 G>A;SNP位点6个,其中4个SNP库已报道的SNP位点.2个新发现的SNP位点,对照组发现一种异常峰型(三峰).结论 DHPLC是一种自动、快速、高通量的基因突变及SNP位点的筛查方法,AT-Ⅲ基因突变可能是导致生育期非妊娠女性CVT的遗传因素之一,功能性SNP位点也可能参与了该人群VTE的发生.

Abstract：

Objective To identify antithrombin Ⅲ(AT- Ⅲ) gene mutation and polymorphisms in pregnant women and parturients with cerebral venous thrombosis (CVT) using denaturing high-performance liquid chromatography (DHPLC). Methods The genomic DNA was extracted from the blood samples of 50 pregnant women and parturients with CVT and 52 matched healthy women for molecular analysis using a PCR/DHPLC assay followed by DNA sequence analysis. Ten primer pairs were designed for amplifying the AT-Ⅲ promoter region and exons 1-6 including the exon/intron boundaries. A rapid screening assay based on DHPLC was established to screen the mutation and polymorphisms of AT- Ⅲ gene. Results Six abnormal peaks were detected in 40 of the patients by DHPLC. Direct DNA sequencing was performed on representative samples detected by DHPLC profiling. One pathogenic heterozygous G13328A missense mutation in exon 6, and a novel silent mutation in exon 4+243 G>A were identified. Six single nucleotide polymorphism (SNP) sites were found, including 4 previously reported ones in the SNP library and two were novel SNP sites. An abnormal peak was detected in the control group by DHPLC. Conclusion DHPLC allows automated and rapid high-throughput detection of AT-Ⅲ gene mutation and polymorphisms in the clinical setting and prenatal diagnosis. Our findings suggested that AT-Ⅲ gene mutation, as well as its polymorphisms, contributes to the occurrence of CVT in pregnant women and parturients.     

AT-Ⅲ基因突变及多态性与颅内静脉系统血栓形成的相关性

目的探讨AT-Ⅲ基因突变及多态性与女性颅内静脉系统血栓形成(cerebral venous thrombosis,CVST)的相关性。方法采集南方医院生育期女性CVST住院患者50例及严格配伍的健康女性52例外周静脉血。采用ELISA法及发色底物法分别检测AT-Ⅲ抗原水平(AT-Ⅲ:Ag)、AT-Ⅲ血浆活性水平(AT-Ⅲ:A)。提取所有受试者全血DNA,PCR扩增后应用变性高效液相色谱(denaturing high performance liquid chromatography,DHPLC)技术分析抗凝血酶-Ⅲ(antithrombin,AT-Ⅲ)基因的启动子区,第1～6外显子及其侧翼序列的基因变异情况。结果病例组与对照组比较,AT-Ⅲ抗原含量水平相当(F=0.754,P=0.472),AT-Ⅲ活性明显降低(P<0.001)。DHPLC筛查发现突变位点1个已报道的致病突变Intron1 5+5 G>A突变,SNP位点5个,其中4个为SNP库已报道的SNP位点,1个为新发现的SNP位点。对照组亦发现4个为SNP库已报道的SNP位点。结论AT-Ⅲ基因突变可能是导致生育期女性CVST的遗传因素之一,功能性SN...