输血造血干细胞移植后红细胞合免疫:临床挑战和对捐赠者和接受者的影响-一个案例报告
Gabriela de Toledo Passos Candelaria1, Letícia Dalla Vecchia Grassi1, Andrea Tiemi Kondo1
1Departamento de Hemoterapia e Terapia Celular, Hospital Israelita Albert Einstein, São Paulo, Brazil.
血液造血干细胞移植 (HSCT) 后对红细胞 (RBC) 抗原的合免疫是罕见的. 这种病例表明,由于来自供体的红细胞抗原不匹配,导致抗U类抗体的发展,突出显示了查的局限性.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 移植 移植 移植 移植
背景情况:
- 对红细胞 (RBC) 抗原的合免疫是异构造血源干细胞移植 (HSCT) 后罕见但显著的并发症.
- 目前的供体选择协议很少评估RBC抗原,除了ABO和Rh不相容.
研究的目的:
- 在无关的HSCT后报告一种独特的抗U抗体发展病例.
- 突出显示 HSCT 中来自供体的红细胞抗原不匹配的含义.
主要方法:
- 一个50岁的男性患有急性髓性白血病,经历了无关的HSCT病例报告.
- 免疫血液学研究包括表型,基因型 (GYPB基因) 和嵌合体分析.
- 识别可兼容的U阴性红细胞单位用于输血支持.
主要成果:
- 患者在HSCT后两年内开发了抗U allo抗体,尽管之前的U-阳性表型.
- 移植后U阴性表型被证实是由于捐赠者衍生的GYPB基因删除和完全的捐赠者混沌.
- 捐赠者分享了罕见的U阴性基因型,这给输血带来了挑战,需要U阴性红细胞单位.
结论:
- 这是HSCT后第一个报告的抗-U配免疫病例,原因是源自供体的红细胞抗原不匹配.
- 这一案例强调了对高频红细胞抗原和相关输血风险的供体查的局限性.
- 需要进行全面的免疫血液学评估,并制定更明确的指导方针,以传达HSCT中的遗传发现.
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