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作 者:王大明[1] 邹红岩[1] 徐筠娉[1] 甄建新[2] 何柳媚[1] 高素青[1]
机构地区:[1]广东省深圳市血液中心免疫遗传研究室,518020 [2]南方医科大学
出 处:《中华医学遗传学杂志》2014年第4期511-514,共4页Chinese Journal of Medical Genetics
摘 要:目的对1例人类白细胞抗原(human leukocyte antigen,HLA)新等位基因进行序列鉴定。方法采用QIAGEN快速DNA抽提试剂盒从外周血样本中提取基因组DNA,PCR方法扩增先证者HLA_C基因的第1外显子至第3内含子和第3内含子-3’非翻译区,PCR产物克隆转染到质粒载体中获得等位基因的单链,对所得克隆子进行第2、3和4外显子双向测序分析。结果先证者样本克隆测序得到两个等位基因,其中一个等位基因为C*03:04;另一个经BLAST验证为新的等位基因,序列已递交GenBank(KF049216)。与最接近的C*01:03等位基因序列相比,新等位基因在第2外显子上有1个核苷酸不同,第316位C〉A,导致第82位氨基酸由精氨酸变为丝氨酸(R82S)。结论该等位基因为HLA-C新等位基因,被世界卫生组织HLA因子命名委员会正式命名为HLA-C*01:78。先证者的HLA分型结果为A*02:07,24:02;B*40:01,46:01;C*01:78,03:04;DQB1*05:02,05:02;DRB1*16:02,16:02。Objective To investigate the genetic basis for a novel allele HLA-C * 01..78. Methods Genomic DNA was extracted from peripheral blood using a QIAGEN quick DNA extraction kit. The regions encompassing HLA-C from exon 1 to intron 3 and intron 3 to 3'UTR were amplified and cloned using a cloning sequencing kit in order to split the two alleles apart. Selected clones were sequenced to include exons 2 to 4. Results Sequencing results have indicated the HLA-C alleles of the proband to be a novel C * 03:04 allele. The sequence has been submitted to GenBank (KF049216). BLAST analysis has confirmed the novel allele to have one nucleotide difference as C * 01:03 at genomic nt316C〉A (codon 82CGC〉AGC) in exon 2, which has resulted in replacement of one amino acid (82R〉S). Conclusion The novel allele has been officially named as C * 01:78 by the WHO Nomenclature Committee. The HLA allele type of the proband was therefore A* 02:07, 24:02; B* 40:01, 46:01; C* 01:78, 03:04; DQB1 * 05:02, 05:02; DRB1 * 16: 02, 16:02.
分 类 号:R394[医药卫生—医学遗传学]
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