检验医学 ›› 2019, Vol. 34 ›› Issue (1): 8-10.DOI: 10.3969/j.issn.1673-8640.2019.01.002

• 临床应用研究?论著 • 上一篇    下一篇

6 545例α- 地中海贫血基因检测结果分析

石明芳, 杨兰, 余夏, 梁秀云()   

  1. 南宁市第二人民医院医学检验科,广西 南宁 530031
  • 收稿日期:2017-11-25 出版日期:2019-01-30 发布日期:2019-01-29
  • 作者简介:null

    作者简介:石明芳,女,1985年生,硕士,主管技师,主要从事分子生物学检验工作。

Analysis of the gene detection results of 6 545 cases of alpha-thalassemia

SHI Mingfang, YANG Lan, YU Xia, LIANG Xiuyun()   

  1. Department of Clinical Laboratory,Nanning Municipal Second People's Hospital,Nanning 530031,Guangxi,China
  • Received:2017-11-25 Online:2019-01-30 Published:2019-01-29

摘要:

目的 了解广西南宁江南区α-地中海贫血(简称地贫)人群的基因型特点。方法 选取疑似α-地贫患者及α-地贫基因携带者配偶6 545例,对其进行基因检测。提取患者DNA,并进行体外扩增。采用跨越断裂点聚合酶链反应对4种常见缺失型α-地贫基因(-α3.7、-α4.2、--SEA、--THAI)进行检测。采用聚合酶链反应结合反向斑点杂交法对3种常见非缺失型α-地贫基因(HbCS、HbQS、HbWS)进行检测。结果 共检出α-地贫基因2 573例(39.31%,2 573/6 545),其中静止型α-地贫1 083例(42.09%,1 083/2 573),轻型α-地贫1 370例(53.25%,1 370/2 573),中间型α-地贫(血红蛋白H病)120例(4.66%,120/2 573)。检出缺失型α-地贫2 070例,以--SEA/αα、-α3.7/αα、-α4.2/αα为主。检出缺失复合突变型α-地贫77例,以--SEA/αWSα、--SEA/αCSα、-α3.7WSα为主。检出非缺失型α-地贫426例,以αCSα/αα、αWSα/αα、αQSα/αα为主。结论 广西南宁江南区人群α-地贫基因携带者较多,缺失型以--SEA/αα为主,非缺失型以αCSα/αα为主,中间型α-地贫(血红蛋白H病)也并非罕见,应对该地区人群开展地贫筛查和基因检测。

关键词: α-地中海贫血;, 基因检测, 基因型

Abstract:

Objective To study the genotype characteristics of alpha-thalassemia in the population of Guangxi Nanning Jiangnan. Methods A total of 6 545 cases of suspected alpha-thalassemia and alpha-thalassemia carriers' spouses received gene detection,and the DNA was extracted and amplified in vitro. By gap polymerase chain reaction,4 common kinds of deficiency alpha-thalassemia genotypes (-α3.7,-α4.2,--SEA and --THAI)were detected. By reverse dot blot polymerase chain reaction,3 common kinds of non-deficiency alpha-thalassemia genotypes (HbCS,HbQS and HbWS) were detected. Results In the 6 545 cases,2 573 cases (39.31%) were identified with alpha-thalassemia gene. Among them,there were 1 083 cases (42.09%) of stationary type,1 370 cases (53.25%)of light type and 120 cases (4.66%) of intermediate type (hemoglobin H disease). There were 2 070 cases of deficiency alpha-thalassemia,and the main genotypes were --SEA /αα,-α3.7/αα and -α4.2/αα. There were 77 cases of deficiency alpha-thalassemia with mutations,and the main genotypes were --SEA/αWSα,--SEA/αCSα and -α3.7WSα. There were 426 cases of non-deficiency alpha-thalassemia,and the main genotypes were αCSα/αα,αWSα/αα and αQSα/αα. Conclusions There are many carriers of alpha-thalassemia gene in Guangxi Nanning Jiangnan. The main genotypes of deficiency and non-deficiency alpha-thalassemia are --SEA/αα and αCSα/αα,respectively. There are many cases of intermediate type alpha-thalassemia(hemoglobin H disease) as well. It should perform gene screening and detection at local area.

Key words: Alpha-thalassemia, Gene detection, Genotype

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