纤维素BOE II:带有出血和缺陷血栓结合的纤维素缺血症
Yang Li1,2, Qian Liang1,2, Wenman Wu1,3
1Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
Research and practice in thrombosis and haemostasis
|August 21, 2023
概括
该AαGlu39Lys纤维素原变体 (BOE II) 损害了血栓结合和血栓形成,导致出血,而不是血栓形成. 这挑战了假设受损的血栓结合总是导致血栓性疾病的假设.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 纤维素原变体结合血的催化部位与出血有关,而非基质结合变体通常与血栓形成有关.
- AαGlu39和BβAla68是纤维激素-氨酸非基质结合中的关键残留物.
- 已经观察到BβAla68Thr变体在家族与血栓表型.
研究的目的:
- 调查同卵性AαGlu39Lys变体 (纤维素BOE II) 在患有纤维素缺血和脑出血的患者中发现的功能后果.
- 为了阐明在这种纤维蛋白质生殖不良病例中导致出血的机制.
主要方法:
- 从患者血中净化异常纤维素素 (BOE II).
- 功能性测试包括西部斑,聚合研究 (纤维素,纤维素单体),凝结性,纤维素释放,XIIIa因子交联,纤维解析和扫描电子显微镜.
- 与正常纤维素原相比较,评估血栓素和巴托克索宾的活性.
主要成果:
- 纤维激素BOE II表明血栓结合减弱,并延迟纤维素凝块的形成.
- 对于纤维素原BOE II,观察到纤维素释放的受损,血栓催化聚合,以及XIIIa因子交叉链接.
- 巴特罗克索宾催化聚合和desA/desAB纤维素单体聚合是正常的;然而,由BOE II形成的纤维素凝块具有更厚的纤维和更快的溶解速率.
结论:
- 缺陷的纤维基胺非基质结合并不总是导致血栓性疾病.
- 在血凝缓慢形成和快速溶解导致的血静受损不被高凝血能力所补偿的情况下,血栓结合性缺陷失纤维素生成症主要表现为出血障碍.
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