• 中国科学论文统计源期刊
  • 中国科技核心期刊
  • 美国化学文摘(CA)来源期刊
  • 日本科学技术振兴机构数据库(JST)

临床输血与检验 ›› 2025, Vol. 27 ›› Issue (6): 854-858.DOI: 10.3969/j.issn.1671-2587.2025.06.018

• 个例报告 • 上一篇    下一篇

一例罕见ABO血型镶嵌体的血清学特征与基因测序分析

戚曦, 朱晓丽, 秦奕, 韩俊岭, 高灵宝   

  1. 南京医科大学附属泰州人民医院,江苏泰州 225300
  • 收稿日期:2025-04-15 出版日期:2025-12-20 发布日期:2025-12-24
  • 通讯作者: 高灵宝,主要从事临床输血医学研究,E-mail:gxq1818@163.com。
  • 作者简介:戚曦,主要从事输血与免疫学检验相关研究,E-mail:05040110@163.com。

Serological Characteristics and Genetic Sequencing Analysis of A Rare ABO Blood Type Mosaicism Case

QI Xi, ZHU Xiaoli, QIN Yi, HAN Junling, GAO Lingbao   

  1. Department of Transfusion, Nanjing Medical University Affiliated Taizhou People's Hospital, Taizhou 225300
  • Received:2025-04-15 Online:2025-12-20 Published:2025-12-24

摘要: 目的 分析1例临床罕见ABO血型镶嵌体的血清学特征,探讨此类疑难血型基因测序方案的选择。方法 分别利用血清学试验、Sanger及PacBio基因测序对1例住院患者ABO血型正定型双群、正反定型不符的疑难结果进行鉴定分析。结果 微柱凝胶卡式法复检正定型仍为“抗-A双群、抗-B阴性”,反定型仍为“A型”,Rh血型D/C/c/E/e抗原未显示双群;试管法患者红细胞与抗-H试剂反应结果为“2+w”,分离与抗-A试剂无凝集的细胞群与抗-H反应结果为“4+”,与卡式法反应的结果有明显差异;前后两次Sanger测序结果不一致,患者等位基因型分别显示为ABO*O.01.01/ABO*O.01.01ABO*A1.02/ABO*O.01.01,PacBio测序结果显示患者等位基因型主要为ABO*O.01.01/ABO*O.01.01,ABO*O.01.01单倍型读数约为400 reads,另有ABO*A1.02单倍型读数约为40 reads。结论 血清学试验出现混合凝集反应时,需进一步辨别是否存在血型嵌合现象,仅用一代测序及基因分型可能漏检血型镶嵌体,PacBio三代测序不仅能明确血型嵌合的类型,且能定量嵌合体或镶嵌体单倍型的比例。

关键词: ABO血型, 嵌合体, 镶嵌体, Sanger测序, PacBio测序

Abstract: Objective To examine the serological features of a rare case of ABO blood type mosaicism and investigate the appropriate gene sequencing methodologies. Methods Serological tests, Sanger sequencing, and PacBio gene sequencing were used to identify the ABO blood type in a hospitalized patient exhibiting discrepancies in forward and reverse typing. Results Micro-column gel card retesting for forward typing showed double cell populations (DCP) with anti-A reagent and a negative result with anti-B reagent, while reverse typing confirmed type "A". Rh blood group antigens D, C, c, E, and e were not detected as DCP. Using the tube method, the patient's red blood cells (RBCs) showed "2+w" agglutination with anti-H reagent, whereas no agglutination was observed with anti-A reagent, but a "4+" reaction was seen with anti-H, indicative of a notable difference compared to the gel method. Sanger sequencing yielded inconsistent results acroos the two tests, revealing two different haplotypes: ABO*O.01.01/ABO*O.01.01 and ABO*A1.02/ABO*O.01.01. PacBio sequencing identified a primary haplotype of ABO*O.01.01/ABO*O.01.01 with approximately 400 reads, along with a haplotype of ABO*A1.02, amounting to about 40 reads. Conclusion Serological tests may fail to identity ABO blood type chimerism, and Sanger sequencing and genotyping may not detect mosaicism. However, PacBio third-generation sequencing offers a more accurate method for identifying ABO blood type and quantifying the proportions of haplotypes in chimeric or mosaic blood types.

Key words: ABO blood type, Chimera, Mosaicism, Sanger sequencing, PacBio sequencing

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