重新定义心脏抗体中介排斥与捐赠者特异性抗体和移植功能障碍
Jason F Goldberg1,2,3, Xin Tian3,4, Ann Bon5
1Inova Schar Heart and Vascular, Falls Church, VA (J.F.G., P.S.).
Circulation. Heart failure
|November 25, 2024
概括
心脏移植接受者具有捐赠者特异性抗体 (DSAs) 和移植功能障碍,即使没有经过活检确认的排斥,也面临更高的风险. 早期识别这些患者对于更好的结果和生存至关重要.
科学领域:
- 心脏病学 心脏病学
- 移植免疫学 移植免疫学
- 生物标志物研究 生物标志物研究
背景情况:
- 心脏移植接受者具有捐赠者特异性抗体 (DSAs) 具有更高的抗体中介排斥的风险.
- 许多移植功能障碍和DSAs患者在内肌心活检 (EMB) 上缺乏抗体介导排斥的明确证据.
研究的目的:
- 评估捐赠者特异性抗体 (DSAs) 与心脏移植接受者的移植功能障碍相结合的临床意义.
- 评估抗体介导排斥类别与长期临床结果之间的关联,包括死亡和左心室功能障碍.
主要方法:
- 一项前性多中心研究,涉及连续的内肌心活检 (EMB),心声图,DSA监测和来自供体的无细胞DNA (dd-cfDNA) 评估.
- 结果被定义为积极的病理性抗体介导排斥 (pAMR+) 或DSA与左心室 (LV) 功能障碍 (LVEF下降≥10%至≤50%).
- 使用考克斯回归分析来确定排斥类别和不良临床结果之间的关联.
主要成果:
- 捐赠者特异性抗体 (DSA) 在40%的患者中存在.
- 与没有pAMR+或DSA+/LV功能障碍的患者相比,pAMR+或DSA+/LV功能障碍患者的中位数%dd-cfDNA显著高于没有pAMR+或DSA+/LV功能障碍的患者.
- 两种pAMR+和DSA+/LV功能障碍都与死亡或长期LV功能障碍的风险增加有显著关联,其中DSA+/LV功能障碍的危险比率显著更高.
结论:
- 扩大抗体中介排斥的定义,以包括患有DSA和并发异位移植功能障碍的患者至关重要.
- 患有DSA和移植功能障碍的患者,即使没有经过活检证明的排斥,也存在显著的不良结果风险,包括死亡.
- 早期识别这些高风险患者对于改善心脏移植的管理和长期存活至关重要.
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