为确定神经管畸形发生是否与某些基因突变有关,利用扩增阻碍突变系统(am plificationrefractory m utation system ,ARMS)法对40例神经管畸形(NTDs)儿母亲和36例正常儿母亲的胱硫脒β合酶(cystathionine beta-synthase,CBS)的2个常见突...为确定神经管畸形发生是否与某些基因突变有关,利用扩增阻碍突变系统(am plificationrefractory m utation system ,ARMS)法对40例神经管畸形(NTDs)儿母亲和36例正常儿母亲的胱硫脒β合酶(cystathionine beta-synthase,CBS)的2个常见突变位点(第919位及第833位)核苷酸进行基因多态性分析。结果显示NTDs组和对照组G919A的纯合突变率分别为35% 和33% ,二者差异无显著性(P> 0.05);T833C的纯合突变率分别为20% 和8% ,二者差异亦无显著性(P> 0.05)。展开更多
This study is to assess the prevalence rates spatial pattern of neural tube defects with geographic information system and spatial filtering technique. A total of 80 infants who diagnosed from neural tube defects in t...This study is to assess the prevalence rates spatial pattern of neural tube defects with geographic information system and spatial filtering technique. A total of 80 infants who diagnosed from neural tube defects in the area being studied between 1998 and 2001 were analyzed. Firstly, the geographic information system （GIS） software ArcGIS was used to map the crude prevalence rates. Secondly, the data were smoothed by the method of spatial filtering. We evaluated that the effect of changes in spatial filtering radius size was assessed by creating maps based on various filtering radius sizes. The 3 miles or larger filtering radius gives better section variability than the 2 and 2.5 miles or smaller ones. The maps produced by the spatial filtering technique indicate that prevalence rates in the villages in the southeastern region are to produce higher prevalence than that in the other regions. The smoothed maps based on Heshun County display a more adequate data representation than the raw prevalence rate map.展开更多
基金Supported by the National Basic Reserch Program of China (973 Program) (2001CB5103)the National Natural Science Foundation of China (40471111 and 70571076).
文摘This study is to assess the prevalence rates spatial pattern of neural tube defects with geographic information system and spatial filtering technique. A total of 80 infants who diagnosed from neural tube defects in the area being studied between 1998 and 2001 were analyzed. Firstly, the geographic information system （GIS） software ArcGIS was used to map the crude prevalence rates. Secondly, the data were smoothed by the method of spatial filtering. We evaluated that the effect of changes in spatial filtering radius size was assessed by creating maps based on various filtering radius sizes. The 3 miles or larger filtering radius gives better section variability than the 2 and 2.5 miles or smaller ones. The maps produced by the spatial filtering technique indicate that prevalence rates in the villages in the southeastern region are to produce higher prevalence than that in the other regions. The smoothed maps based on Heshun County display a more adequate data representation than the raw prevalence rate map.
