血小板因子4抗体持久性和长期致病性在疫苗诱导的免疫性血栓性血栓性缺血中
Adam Kanack1, Emily Mauch1, Guillaume Roberge2
1Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.
medRxiv : the preprint server for health sciences
|December 8, 2025
概括
疫苗诱导的免疫血栓性血栓性缺血 (VITT) 抗体可能比最初认为的持续时间更长. 虽然大多数VITT抗体随着时间的推移而减少,但有些可以导致慢性问题,表明潜在的长期影响.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 腺病毒载体疫苗很少会导致疫苗诱导的免疫血栓性血栓性缺血症 (VITT).
- VITT通常是一种短暂的疾病,但抗血小板因子4 (PF4) 抗体可能会持续存在.
- 维特抗PF4抗体的持续性及其长期影响仍然不清楚.
研究的目的:
- 在VITT患者中调查抗PF4抗体的持久性和特征.
- 为了确定VITT是否涉及持久抗体克隆或新抗体开发.
- 评估VITT的长期后果的潜力.
主要方法:
- 从6名Ad26.COV2.S相关的VITT患者收集了急性和随访血清样本 (随访时间中位数为244天).
- 使用亲和性丰富剂检测单一/寡克隆PF4/氨酸反应抗PF4抗体.
- 分析了抗体轻链使用情况 (lambda与kappa) 并评估了血小板激活潜力.
主要成果:
- 在VITT患者中检测到单/寡克隆抗PF4抗体,这与单克隆性甘美病症不同.
- 随着时间的推移,抗PF4抗体水平下降,在急性后期没有新的抗体生产.
- 虽然大多数抗体不会导致长期问题,但在ChAdOx1 nCoV-19 VITT治疗四年后,一名患者表现出持续的血小板激活抗体,导致慢性血小板缩.
结论:
- 维特抗PF4抗体可以持续存在,尽管其数量通常会减少.
- 在VITT抗体生产中存在免疫异质性 (例如,卡帕轻链).
- 罕见的VITT病例可能导致长期的血小板缺血,挑战VITT仅仅是短暂的观点.
相关概念视频
Vaccinations
51.1K
Overview
51.1K
Immunological Memory
14.9K
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
14.9K
Formation of the Platelet Plug
8.6K
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
8.6K


