累积的供体特异性抗体值预测了HLA-alloimmunized患者的血小板输血反应
Aaron B Boothby1, Matthew K Tanner2, Abdullah Alswied3
1Department of Hematology, University of Washington, Seattle, WA.
Blood advances
|July 19, 2024
概括
高水平的HLA抗体水平 (DSA-MFI ≥10,000) 和其他因素显著降低了血小板输血在患有血液瘤疾病的患者的有效性. 使用算法优化供体选择可以改善输血后的血小板计数.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 输血医学 输血医学
背景情况:
- 免疫介导的血小板输血折射性影响到三分之一的血液瘤病患者接受多次输血.
- 在HLA-alloimmune患者中影响输血后血小板校正计数增量 (CCI) 的因素尚未完全理解.
- 在HLA抗体表征方面的进步允许评估供体特异性抗体 (DSA) 激发率 (MFI) 和其影响.
研究的目的:
- 评估累积HLA DSA-MFI和其他因素对HLA合免疫患者输血后CCI的影响.
- 开发和测试基于DSA-MFI的计算机算法,以优化基于DSA-MFI的捐赠者-接受者的基因相容性.
- 确定可操作的CCI预测因子,以改善血小板输血结果.
主要方法:
- 追溯分析2012年从73名HLA-alloimmunized患者的血小板输血.
- 在2小时和24小时的CCI上评估累积的HLA DSA-MFI,捐赠者,组件和患者特征.
- 开发和测试用于HLA-血小板选择的计算机算法.
主要成果:
- 累积的HLA DSA-MFI ≥10,000,ABO不匹配,壮病,输血反应和储存在添加剂溶液中对2小时的CCI产生了负面影响.
- 一个DSA-MFI值为10,000与增加的抗体介导补充激活和CCI失败相关.
- 该算法证明了减少DSA-MFI用于HLA血小板选择的可行性.
结论:
- 累积HLA DSA-MFI ≥10,000是影响血小板输血疗效的关键值.
- 一个DSA-MFI值可以告知允许的血小板不匹配策略.
- 优化HLA匹配并考虑ABO兼容性可以增强耐火患者的CCI.
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