摘要
目的探讨变性高效液相色谱技术(DHPLC)在快速诊断β地中海贫血及分型中的应用价值。方法采用外周血红细胞平均体积(MCV)、红细胞分布宽度(RDW)、红细胞脆性和Hb电泳4项指标相结合的方法筛选地中海贫血可疑标本226份。运用PCR反向斑点杂交技术(PCR-RDB)和DHPLC对226份可疑标本进行基因分型确诊。结果226份可疑静脉血标本中,经PCR-RDB和DHPLC确诊的β地中海贫血为69份,两种方法检测缺失和突变的基因型别完全一致,占地中海贫血筛查总人数的30.5%。其中CD41/CD42(-TCTT)移码突变37例(54%);IVS-Ⅱ-654(C→T)插入序列突变12例(17%);TATA-28(A-G)转录突变10例(15%);CD17(A→T)无义突变5例(7%);CD71/CD72(+A)移码突变5例(7%)。结论DHPLC可快速、高效和准确地对β地中海贫血进行基因分型诊断。
Objective To evaluate the application value of denaturing high-performance liquid chromatography (DHPLC) as a rapid gene typing tool for β thalassemia. Methods 226 suspicious samples were screened with MCV, RDW, erythrocyte fragility and hemoglobin electrophoresis. The final diagnosis of β thalassemia genotype was made by DHPLC and PCR-reverse dot blot (PCR-RDB). Results Sixty-nine samples (30. 5% ) were eventually diagnosed as β-thalassemia by PCR-RDB. The genotyping results for β thalassemia identified by DHPLC were complete agreement with genotyping results by PCR-RDB. We found 37 cases of CD41/CD42 (-TCTF) frame shift mutation(54% ); 12 cases of IVS-Ⅱ-654 (C→T) insertion mutation(17%);10 cases of TATA-28 (A→G) transcription mutation (15%);5 cases of CD17 (A→T) nonsense mutation(7%) ;5 cases of CD71/CD72 (+A) frame shift mutation(7%) . Conclusion The DHPLC is a rapid, sensitive , efficient and highly accurate assay in the diagnosis of β-thalassemia.
出处
《中华检验医学杂志》
CAS
CSCD
北大核心
2008年第8期887-889,共3页
Chinese Journal of Laboratory Medicine
关键词
Β地中海贫血
基因型
色谱法
高压液相
beta-Thalassemia
Genotype
Chromatography,high pressure liquid