在严重急性心脏异构移植拒绝中,来自捐赠者的无细胞DNA分层化死亡和移植功能障碍的风险
Zaid N Safiullah1,2,3, Han Su4, Hyesik Kong2,3
1Critical Care Medicine Department, National Institutes of Health, Bethesda, MD.
medRxiv : the preprint server for health sciences
|September 26, 2025
概括
严重的心脏急性排斥 (AR) 在心脏移植患者中,由高的捐赠者衍生细胞自由DNA (%dd-cfDNA) 表明,显著增加死亡或持续的左心室功能障碍的风险. 这一发现为患者分层提供了新的预后见解.
科学领域:
- 心脏病学 心脏病学
- 移植免疫学 移植免疫学
- 基因组学就是基因组学.
背景情况:
- 心脏急性排斥 (AR) 是心脏移植接受者不良结果的重要危险因素.
- 目前的风险预测模型对死亡风险或持续左心室功能障碍的患者进行分层是有限的.
- 在AR诊断时,来自捐赠者的无细胞DNA (%dd-cfDNA) 百分比的预后效用需要进一步评估.
研究的目的:
- 评估%dd-cfDNA的预后价值,预测心脏移植接受者诊断为AR的不良结果.
- 为了确定%dd-cfDNA水平是否可以帮助分层AR患者的死亡风险或持续的左心室功能障碍.
主要方法:
- 在多中心GRAfT研究中对心脏移植接受者的潜在招生.
- 连续采集血样本以量化%dd-cfDNA.
- 将AR分为轻度至中度和重度,并通过0.25%的%dd-cfDNA值进行进一步分层.
主要成果:
- 严重的AR,与轻度至中度的AR不同,与持续的LVEF下降 (<50%) 和/或死亡 (HR = 5.17,p < 0.001) 的复合结局风险增加显著相关.
- 在严重AR患者中,诊断时%dd-cfDNA水平>0.25%与初级结局的更高风险有关 (HR = 6.06,p = 0.004).
- 在经历了不良结果的严重AR患者中,%dd-cfDNA水平仍然升高.
结论:
- 严重的AR,特别是伴随着%dd-cfDNA水平升高时,是心脏移植接受者的糟糕结果的强有力的预测因素.
- 将%dd-cfDNA测量集成到AR诊断中,为风险分层提供了新的预后效用.
- 在严重AR患者中,高%dd-cfDNA需要密切监测不良事件.
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