Human leukocyte antigen (HLA) system is the most polymorphic region known in the human genome. In the present study, we analyzed for the first time the HLA-A gene polymorphisms defined by the high-resolution typing me...Human leukocyte antigen (HLA) system is the most polymorphic region known in the human genome. In the present study, we analyzed for the first time the HLA-A gene polymorphisms defined by the high-resolution typing methods-sequence-based typing (SBT) in 161 Northern Chinese Han people. A total of 74 different HLA-A gene types and 36 alleles were detected. The most frequent alleles were A*110101 (GP=0.2360), A*24020101 (GF=0.1646), and A*020101 (GF=0.1553); followed by A*3303 (GF=0.1180), A*3001 (GF=0.0590), and A*310102 (GF=0.0404). The frequencies of following alleles, A*0203, A*0205, A*0206, A*0207, A*030101, A*2423, A*2601, A*3201, and A*3301, are all higher than 0.0093. The homozygous alleles include A*020101, A*110101, A*24020101 and A*310102. Heterozygosity (H), polymorphism information content (PIC), discrimination power (DP) and probability of paternity exclusion (PPE) of HLA-A in the samples were calculated and their values were 0.8705, 0.8491, 0.6014, and 0.9475, respectively. These results by SBT analysis of HLA-A polymorphism in Northern Chinese Han population, especially the allele subtypes character, will be of great interest for clinical transplantation, disease-associated study and forensic identification. Implementation of high-resolution typing methods allows a significantly wider spectrum of HLA variation including rare alleles. This spectrum will further be extensively utilized in many fields.展开更多
目的研究PCR-SBT法HLA基因分型结果判读中出现的模棱两可问题并提出解决策略。方法对306名随机抽取的组织配型患者的DNA采用PCR-序列特异性引物(Sequence Specific Primer,SSP)低分辨方法检测,同时采用PCR-SBT法进行HLA-A,B,DRB1高分辨...目的研究PCR-SBT法HLA基因分型结果判读中出现的模棱两可问题并提出解决策略。方法对306名随机抽取的组织配型患者的DNA采用PCR-序列特异性引物(Sequence Specific Primer,SSP)低分辨方法检测,同时采用PCR-SBT法进行HLA-A,B,DRB1高分辨基因分型。PCR-SBT法模棱两可结果用PCR-SSP高分辨方法复核确认。结果所有306例检测标本的高低分辨血清学抗原一致,经PCR-SBT基因测序方法检测有111份模棱两可结果,占36.3%(111/306)。其中HLA-A座位有30对等位基因存在模棱两可结果,占所有检测标本等位基因总数的3.3%;HLA-B座位有66对,占7.2%;HLA-DRB1座位有36对,占3.9%。所有模棱两可标本经PCR-SSP HLA基因高分辨分型试剂PCR-SSP等方法复核确认。结论针对PCR-SBT法进行HLA-A,B,DRB1高分辨基因分型模棱两可结果所建立的解决策略,对于提高HLA数据分型的速度和分型准确性有重要意义。展开更多
目的:直接测序法及外显子3 DNA片段克隆测序定确认MICA新的等位基因MICA*002:04。方法:用组特异性引物分别扩增MICA基因,采用Sequence Base Typing(SBT)法分型技术及PCR片段克隆测序法对MICA多态性基因的外显子2、3、4、5进行双向测序...目的:直接测序法及外显子3 DNA片段克隆测序定确认MICA新的等位基因MICA*002:04。方法:用组特异性引物分别扩增MICA基因,采用Sequence Base Typing(SBT)法分型技术及PCR片段克隆测序法对MICA多态性基因的外显子2、3、4、5进行双向测序。结果:发现1个与MICA*002:01序列相近的新等位基因,在外显子3上有1个碱基位置与国际通用MICA数据库不相符。该基因与MICA*002:01相比在外显子3的碱基位置486出现突变(C→A),密码子位置20由GCC→GCA,相应编码氨基酸是同义突变。结论:DNA测序结果表明该基因序列为新的MICA等位基因,已提交GenBank,于2010年9月被世界卫生组织HLA因子命名委员会正式命名为MICA*002:04。展开更多
文摘Human leukocyte antigen (HLA) system is the most polymorphic region known in the human genome. In the present study, we analyzed for the first time the HLA-A gene polymorphisms defined by the high-resolution typing methods-sequence-based typing (SBT) in 161 Northern Chinese Han people. A total of 74 different HLA-A gene types and 36 alleles were detected. The most frequent alleles were A*110101 (GP=0.2360), A*24020101 (GF=0.1646), and A*020101 (GF=0.1553); followed by A*3303 (GF=0.1180), A*3001 (GF=0.0590), and A*310102 (GF=0.0404). The frequencies of following alleles, A*0203, A*0205, A*0206, A*0207, A*030101, A*2423, A*2601, A*3201, and A*3301, are all higher than 0.0093. The homozygous alleles include A*020101, A*110101, A*24020101 and A*310102. Heterozygosity (H), polymorphism information content (PIC), discrimination power (DP) and probability of paternity exclusion (PPE) of HLA-A in the samples were calculated and their values were 0.8705, 0.8491, 0.6014, and 0.9475, respectively. These results by SBT analysis of HLA-A polymorphism in Northern Chinese Han population, especially the allele subtypes character, will be of great interest for clinical transplantation, disease-associated study and forensic identification. Implementation of high-resolution typing methods allows a significantly wider spectrum of HLA variation including rare alleles. This spectrum will further be extensively utilized in many fields.
文摘目的研究PCR-SBT法HLA基因分型结果判读中出现的模棱两可问题并提出解决策略。方法对306名随机抽取的组织配型患者的DNA采用PCR-序列特异性引物(Sequence Specific Primer,SSP)低分辨方法检测,同时采用PCR-SBT法进行HLA-A,B,DRB1高分辨基因分型。PCR-SBT法模棱两可结果用PCR-SSP高分辨方法复核确认。结果所有306例检测标本的高低分辨血清学抗原一致,经PCR-SBT基因测序方法检测有111份模棱两可结果,占36.3%(111/306)。其中HLA-A座位有30对等位基因存在模棱两可结果,占所有检测标本等位基因总数的3.3%;HLA-B座位有66对,占7.2%;HLA-DRB1座位有36对,占3.9%。所有模棱两可标本经PCR-SSP HLA基因高分辨分型试剂PCR-SSP等方法复核确认。结论针对PCR-SBT法进行HLA-A,B,DRB1高分辨基因分型模棱两可结果所建立的解决策略,对于提高HLA数据分型的速度和分型准确性有重要意义。
文摘目的:直接测序法及外显子3 DNA片段克隆测序定确认MICA新的等位基因MICA*002:04。方法:用组特异性引物分别扩增MICA基因,采用Sequence Base Typing(SBT)法分型技术及PCR片段克隆测序法对MICA多态性基因的外显子2、3、4、5进行双向测序。结果:发现1个与MICA*002:01序列相近的新等位基因,在外显子3上有1个碱基位置与国际通用MICA数据库不相符。该基因与MICA*002:01相比在外显子3的碱基位置486出现突变(C→A),密码子位置20由GCC→GCA,相应编码氨基酸是同义突变。结论:DNA测序结果表明该基因序列为新的MICA等位基因,已提交GenBank,于2010年9月被世界卫生组织HLA因子命名委员会正式命名为MICA*002:04。
