广东地区汉族产前人群δ地贫基因的突变谱与血液学分析  被引量:6

Analysis of haematological phenotype and mutation spectrum of 6-globin gene from Guangdong area in Chinese HaM prenatal population Zhong Liangying

在线阅读下载全文

作  者:钟良英[1] 谢英俊[2] 陈培松[1] 冯一苇 刘敏[1] 黄彬[1] 何小洪[1] 淦鑫[4] 

机构地区:[1]中山大学附属第一医院检验医学部,广州510080 [2]广州医科大学附属第三医院妇产科 [3]中山大学中山医学院 [4]南昌大学附属第一医院呼吸内科

出  处:《中华医学杂志》2017年第20期1580-1583,共4页National Medical Journal of China

摘  要:目的研究中国广东地区汉族产前人群中δ地贫球蛋白基因(HBD)的突变类型以及各类型突变频率,并统计分析各类型突变的血液学变化,以丰富人群8.地贫基因突变图谱。方法收集2012年1月至2015年5月在我院进行产前地中海贫血筛查的样本7580例,筛选出符合条件的33例患者,男10例,女23例,年龄22—48岁。用XE4000i血细胞分析仪进行血细胞分析,高效液相色谱法(HPLC)进行血红蛋白(Hb)、血红蛋白A2(HbA2)和血红蛋白F(HbF)定量检测。提取基因组DNA后进行PCR扩增、基因测序方法检测目标样本基因突变。结果33例患者中检出21例存在8-地贫突变,突变率约为0.277%(21/7580)。检测出7种不同的突变类型。其中4种为已知的突变类型,包括12例基因型为-77(T〉C)[HBDc.-127(T〉C)](57.14%),4例为-30(T〉C)[HBDc.-80(T〉C)](19.05%),1例为eodon10(-G)(HBDc.31delG)(4.76%),1例为HBDc.244C〉T;另外新发现3种突变,1例为HBDc.22—24delGAG(4.76%),1例为HBDc.347C〉T(4.76%),1例为HBDc.349C〉G(4.76%)。结论8地贫基因突变类型多样,-77(T〉C)是广东地区汉族产前人群最常见的8球蛋白基因突变。本研究报道的3例新突变丰富了8球蛋白基因的突变谱,应重视产前人群的8球蛋白基因检测,对产前咨询和诊断有重要意义。Objective To analyze the genotype-phenotype correlations among southern Chinese HaM prenatal population in Guangdong area with 8-globin gene mutation, so as to enrich the deha-thalassemia gene mutations data. Methods A total of 33 cases were selected in 7 580 patients during prenatal thalassemia trait screening, from January 2012 to May 2015 (including 10 males and 23 females, aged 22 - 48 years old). Complete blood cell count was performed on a XE 4000i automatic hemocyte analyzer. Hb, HbF and HbA2 were tested by high performance liquid chromatography (HPLC). Genomic DNA was extracted from whole blood samples using a whole blood genomic DNA extraction kit. Polymerase chain reaction (PCR) was used to amplify three different fragments corresponding to the exons and the regulatory sequences using three different couples of primers for the 8-globin gene. Results Twenty one of the 33 samples were positive for the 8-globin gene defects. Four previously known mutations were detected: including 12 cases for -77 (T 〉 C) [ HBD c. -127 ( T 〉 C) ] (57.14%) ,4 cases for -30 ( T 〉 C) [ HBD c. -80 (T 〉 C) ] ( 19.05% ) ,1 case for codon 10 (-G) ( HBD c. 31delG) (4. 76% ) ,and 1 case for HBD c. 244 C 〉 T(4. 76% ). Three new 8-globin gene defects which had not yet been reported in database were detected, including 1 case for HBD c. 22_24delGAG(4.76% ) ,1 case for HBD c. 347 C 〉 T(4.76% ) ,and one case for HBD c. 349 C 〉 G ( 4. 76% ). Conclusions -77 ( T 〉 C ) is the most common mutation in Chinese southern prenatal population. Three new HBD gene mutations are referred in this report, which provide the valuable information for genetic counseling and prenatal diagnosis in Guangdong area.

关 键 词:δ-地中海贫血 球蛋白类 基因 突变 产前诊断 

分 类 号:R440[医药卫生—诊断学] R714.5[医药卫生—临床医学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象