捐赠者来源的无细胞DNA的相对变化优于诊断急性肺异位移植功能障碍的绝对值
Anil J Trindade1,2, Kaitlyn C Chapin2, Jennifer N Gray3
1Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN.
Transplantation direct
|May 30, 2023
概括
在移植后两年内,在肺移植患者中检测急性肺异位功能障碍 (ALAD) 时,来自捐赠者的细胞自由DNA (dd-cfDNA%) 的相对变化比绝对的dd-cfDNA%值更有效. 超过73%的参考变化值 (RCV) 表明ALAD的诊断性能优越.
科学领域:
- 移植免疫学 移植免疫学
- 发现生物标志物的发现.
- 肺部医学 肺部医学
背景情况:
- 来自捐赠者的无细胞DNA (dd-cfDNA%) 是早期急性肺异位功能障碍 (ALAD) 的已知生物标志物.
- 在移植后两年多的患者中,其生物变异性较高的实用性仍然不太了解.
- 之前的工作确定了稳定的长期肺接受者中dd-cfDNA%的中位数为0.45%和73%的参考变化值 (RCV).
研究的目的:
- 为了确定 dd-cfDNA% 的相对变化 (RCV) 或绝对值是否更有效地检测两年以后的肺移植接受者中的 ALAD.
- 在这个患者群体中比较RCV和绝对dd-cfDNA%值的诊断性能.
主要方法:
- 在肺移植后≥2年的患者中,每3-4个月对血dd-cfDNA%进行前性测量.
- 以后判定的ALAD,以感染,排斥或显著的肺功能下降 (>10%的FEV1变化) 定义.
- 分析接收器运行特征 (ROC) 曲线,以比较RCV和绝对dd-cfDNA%值的曲线下的面积 (AUC).
主要成果:
- 在71名患者 (30名患有ALAD),dd-cfDNA%的RCV显示AUC明显高于绝对dd-cfDNA%值 (0.87对0.69,P=0.018).
- 一个RCV>73%实现87%的灵敏度和78%的特异性ALAD诊断.
- 相比之下,绝对dd-cfDNA% ≥1%的敏感性较低 (50%),但特异性相似 (78%).
结论:
- 在dd-cfDNA%中的相对变化,特别是RCV>73%,与绝对dd-cfDNA%的值相比,在长期肺移植接受者中为ALAD提供了更好的诊断性能.
- 监测dd-cfDNA%的变异性是一种更敏感的方法,用于在移植后两年以上的患者中检测ALAD.
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