摘要
目的:分析广州市花都地区育龄人群常见和罕见地中海贫血(简称地贫)基因型分布情况,完善该地区的地贫基因库.方法:收集2016年1月至2022年10月在广州市花都区妇幼保健院进行地贫基因检测的全血标本,采用跨越断裂点PCR+导流杂交法检测23种常见地贫基因型,对于怀疑为罕见地贫的样本采用琼脂糖凝胶电泳、珠蛋白测序等方法进行罕见地贫基因型检测.结果:在36 412例受检者中,地贫基因阳性者共16 171例(44.41％),常见型16 057例(44.10％),罕见地贫基因型为114例(0.31％).检出常见α-地贫10 845例(29.78％),以--SEA/αα最多,-α3.7/αα次之,-α4.2/αα占第三位;检出常见β-地贫4 531例(12.44％),以β41-42/βN最多,β654/βN次之,β-28/βN占第三位;共检出α β复合型地贫基因型681种(1.87％),以--SEA/αα复合βCD41-42/βN为最多.检测出罕见α-地贫48例,14种突变型,以融合基因(Fusion gene/αα)最多见;罕见β-地贫52例,共11种突变类型,以βSEA-HPFH/βN最多见.结论:花都地区常见和罕见地贫基因型复杂多样,应该重视罕见地贫基因型的检测.
Abstract
Objective:To analyze the genotypes distribution of common and rare thalassemia in people of reproductive age in Huadu district of Guangzhou,enhance the database of thalassemia.Methods:Peripheral blood samples were collected for genotype analysis in Maternity and Child Health Hospital of Huadu District from January 2016 to October 2022.Gap-PCR and Reverse dot blot hybridization were used to detect common thalassemia genotypes.DNA sequencing was performed in samples suspected of rare genotypes.Results:A total of 16 171 subjects were identified as thalassemia carriers,and the positive rate was 44.41％(16 171/36 412).The genotypes of 114 cases(0.31％)were rare.A total of 10 845 cases were identified as α-thalassemia carriers(29.78％),and--SEA/αα was the most common genotype in those people,followed by-α3.7/αα and-α4.2/αα.A total of 4 531 subjects were identified as common β-thalassemia carriers(12.44％).The most common β-thalassemia mutation in the population was β41-42/βN,followed by β654/βN and β-28/β N.A total of 681 subjects were identified as αβ thalassemia carriers(1.87％),among them--SEA/αα compounded withβ CD41-42/β N was the most common genotype.A total of 48 cases were identified as rare α-thalassemia carriers,14 types of mutations,in which Fusion gene/αα was the most common.A total of 52 cases were identified as rare β-thalassemia carriers,11 types of mutation,in which βSEA-HPFH/βN was the most common.Conclusion:The thalassemia genotypes in Huadu district are complex and diverse.We should attach great importance to the detection of rare thalassemia genotypes.
维普
万方数据