在SERPINC1基因中p.Lys322stop变异的临床和功能特征,该变异会导致严重的血栓ophilia
Haiyue Zhang1, Xinyang Yue2, Tenglong Dai2
1Thrombosis Research Center, Beijing Jishuitan Hospital, Capital Medical University, Xicheng District, Beijing, 100035, China.
Orphanet journal of rare diseases
|December 20, 2024
概括
一个新的SERPINC1基因突变 (c.964 A>T) 产生了一个截断的抗血素 (AT) 蛋白 (AT-K322*). 这种缺陷会损害AT分泌,导致抗血素缺乏并影响凝血.
科学领域:
- 遗传学和分子生物学
- 血液学 血液学 血液学
- 生物化学 生物化学
背景情况:
- 抗血素 (AT) 缺乏与SERPINC1基因突变有关.
- 一种特定的SERPINC1变体 (c.964 A>T,p.Lys322stop) 被确定并研究其在AT缺乏症中的作用.
研究的目的:
- 阐明SERPINC1 c.964 A>T变种导致抗血素缺乏症的机制.
- 分析所产生的截断的AT蛋白 (AT-K322*) 的结构和功能影响.
主要方法:
- 在基分析预测了突变保护和结构影响.
- 血生成试验评估了凝血.
- 重组AT-K322*和野生型AT (AT-WT) 在HEK293T细胞中表达.
- 通过RT-qPCR,西部涂抹,ELISA和免疫细胞光测试来评估蛋白质表达和分泌.
主要成果:
- 在分析中,AT-K322*中删除的氨基酸的保存率很高.
- AT-K322*和AT-WT的mRNA水平是可以比较的.
- 截断的AT-K322*蛋白被检测到细胞内,但不在细胞外介质中.
结论:
- 该SERPINC1 c.964 A>T突变产生了一个截断的AT蛋白 (AT-K322*).
- 这种切断显著损害了抗凝血素的分泌.
- 在这种情况下,AT-K322*的缺陷分泌是抗血素缺乏的根本原因.
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