种族群体中的HLA多样性可能会影响单抗原珠通过单抗原珠检测捐赠者特异性抗体
Justin C Quon1, Kelli Kaneta2, Nicholas Fotiadis3
1Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States.
Frontiers in immunology
|December 11, 2023
概括
人类白细胞抗原 (HLA) 单抗原珠测定可能错过捐赠者特异性抗体 (DSA) 由于未代表的表位,特别是在非欧洲人群中. 基因级HLA类型化可以识别这些可能错过的DSA,改善移植结果.
科学领域:
- 免疫学 免疫学 免疫学
- 移植科学 移植科学
- 遗传学 是一个遗传学.
背景情况:
- 捐赠者特异性抗体 (DSA) 在固体器官移植排斥中至关重要.
- 人类白细胞抗原 (HLA) 单抗原珠 (SAB) 试验是DSA检测的标准.
- SAB测定可能无法检测到对未代表的HLA表位体的抗体,具有潜在的种族变异.
研究的目的:
- 调查SAB测定中未代表的HLA蛋白在不同族裔群体中的流行率.
- 评估由于未表达的HLA表位因错过DSA的可能性.
- 为了比较不同制造商的SAB产品中的HLA蛋白代表性.
主要方法:
- 对比了来自七个族群的HLA等位基因频率与来自两个制造商的SAB产品中的HLA蛋白质.
- 利用下一代测序来对60位已故捐献者的HLA类型进行测序.
- 采用结构建模来评估未代表蛋白质上潜在的HLA表位.
主要成果:
- 少数民族群体中0.5%~11.8%的个体有HLA蛋白,而不是一个供应商的SAB测定.
- 非欧洲人群表现出更高数量的未代表的HLA等位基因.
- 26.7%的已故捐赠者拥有未代表的HLA-A, -B, -C或 -DRB1蛋白质,具有潜在可检测的表位.
结论:
- 在完全排除HLA DSA时,SAB测定具有局限性.
- 不代表的HLA表位因种族而异,需要注意,特别是在非欧洲队列中.
- 在鉴定潜在未被检测到的HLA抗体时,基因级别的HLA类型是必不可少的.
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