由于涉及一种新型FUT1变异的复合异构性而导致的一种巴巴拜现象型
Melina Luján Brajovich1,2, Cecilia González3, Cintia Principi1,2
1Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina.
Vox sanguinis
|October 12, 2025
概括
在一个孕妇中发现了一种新的FUT1等位基因变异,该变异基因具有巴拉 - 孟买表型,其中ABH抗原不在红细胞上,但存在于唾液中. 这一发现揭示了这种罕见血型的遗传基础.
科学领域:
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
背景情况:
- 准孟买表型是一种罕见的血型,红细胞上缺少ABH抗原的特征.
- 通常在具有这种表型的个体的唾液中发现ABH物质.
- 了解罕见血型的遗传基础对于输血医学至关重要.
研究的目的:
- 为了确定一个孕妇在孕妇中的巴姆拜表型的遗传原因.
- 描述与这种表型相关的新型FUT1等位基因.
主要方法:
- 对血液和唾液样本进行血清学检测,以检测ABO,H和Lewis类型的表型,以及分泌者状态.
- 对 ABO,FUT1 和 FUT2 基因进行测序.
- 通过克隆测序来确定哈普洛型.
- 使用ChimeraX和AlphaFold进行了新型FUT1变体的in silico结构分析.
主要成果:
- 血清学测试证实了巴巴巴的表型.
- 测序确定了ABO*A1.01和ABO*O.01.01等位基因.
- 在FUT1*01W.31.31的复合异构性中发现了一种新的FUT1等位基因 (c.521T>C,p.Phe174Ser).
- 在分析表明p.Phe174Ser替代影响FUT1蛋白质的疏水核中的一个关键结构残留物.
结论:
- 在这种情况下,para-Bombay表型归因于FUT1*01W.31等位基因和一种新型FUT1等位基因的复合异构性.
- 新的误解替代c.521T>C (p.Phe174Ser) 可能导致FUT1酶功能减弱.
- 这一发现有助于了解导致罕见血型表型的遗传变异.
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