受体细胞是SCD成年人移植失败和混合化学反应后血液恶性瘤的来源
Mohamed A E Ali1, Emily M Limerick1, Matthew M Hsieh1
1Cellular and Molecular Therapeutics Branch, NHLBI, NIH.
medRxiv : the preprint server for health sciences
|January 27, 2025
概括
对状细胞疾病 (SCD) 的血造细胞移植 (HCT) 可以导致源自受体细胞的血液恶性瘤 (HMs). 在SCD患者中,在HCT后实现完整的捐赠者嵌合可能会降低HM风险.
科学领域:
- 血液学 血液学 血液学
- 在瘤学瘤学.
- 移植医学 移植医学
背景情况:
- 非骨髓剥离性造血细胞移植 (HCT) 提供了治疗状细胞疾病 (SCD) 的方法.
- 之前的协议针对混合的捐赠者/接受者化学反应,但最近的发现表明,在患有SCD后HCT的成年人中,血液恶性瘤 (HMs) 的风险增加,特别是在移植失败或混合化学反应的情况下.
研究的目的:
- 在非骨髓缩性HCT后患有状细胞疾病 (SCD) 的患者中调查血液恶性瘤 (HMs) 的细胞起源.
- 为了确定HM是否来自捐赠者或受体细胞,在混合嵌合的背景下.
主要方法:
- 对从5名SCD患者的被排序的外周血液或骨髓细胞 (成熟血统和白血病爆发) 的DNA进行了化学主义分析,这些患者在HCT后发展了HMs.
- 聚合酶连锁反应 (PCR) 放大多态短串重复被用于模拟分析.
主要成果:
- 在所有5名患者的白血病爆细胞中,发现99-100%来自接受者.
- 相比之下,混合嵌合症患者的成熟细胞系仍然表现出来自捐赠者的细胞部分.
结论:
- 非骨髓衰变条件可能允许接受细胞与白血病前克隆的生存,这些克隆在压力下可以演变为恶性瘤.
- 修改后的HCT协议现在旨在实现完全的捐赠者混沌,以减轻SCD患者HM发展的风险.
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