中性粒细胞胞外陷阱
分子生物学
DNA
抗磷脂综合征
糖蛋白
电泳迁移率测定
生物
细胞外
自身免疫
免疫荧光
抗体
化学
免疫学
细胞生物学
基因
生物化学
转录因子
炎症
作者
Katarína Kmeťová,Elena Lonina,Srilakshmi Yalavarthi,Jerrold S. Levine,Claire K. Hoy,Cyrus Sarosh,Kelsey Gockman,Alexandra E. Morris,Ajay Tambralli,Jacqueline A. Madison,Yu Zuo,Rebecca Subang,Joyce Rauch,Jason S. Knight
标识
DOI:10.1016/j.clim.2023.109714
摘要
Beta-2 glycoprotein I (β2GPI) is a phospholipid-binding plasma protein and prominent autoantigen in antiphospholipid syndrome (APS). Here, we tested the hypothesis that β2GPI might bind to not only phospholipids, but also cell-free DNA and neutrophil extracellular traps (NETs). We report that β2GPI interacts with cell-free DNA from different species, as well as NETs, in a dose-dependent manner, retarding their migration in an agarose-gel electrophoretic mobility shift assay. We confirm the direct binding interaction of β2GPI with DNA and NETs by ELISA. We also demonstrate that β2GPI colocalizes with NET strands by immunofluorescence microscopy. Finally, we provide evidence that β2GPI-DNA complexes can be detected in the plasma of APS patients, where they positively correlate with an established biomarker of NET remnants. Taken together, our findings indicate that β2GPI interacts with DNA and NETs, and suggest that this interaction may play a role as a perpetuator and/or instigator of autoimmunity in APS.
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