ChAdOx1 interacts with CAR and PF4 with implications for thrombosis with thrombocytopenia syndrome.

ChAdOx1 interacts with CAR and PF4 with implications for thrombosis with thrombocytopenia syndrome.
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DOI:
10.1126/sciadv.abl8213
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发表时间:
2021-12-03
期刊:
影响因子:
13.6
通讯作者:
Borad MJ
Borad MJ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Baker AT;Boyd RJ;Sarkar D;Teijeira-Crespo A;Chan CK;Bates E;Waraich K;Vant J;Wilson E;Truong CD;Lipka-Lloyd M;Fromme P;Vermaas J;Williams D;Machiesky L;Heurich M;Nagalo BM;Coughlan L;Umlauf S;Chiu PL;Rizkallah PJ;Cohen TS;Parker AL;Singharoy A;Borad MJ

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我们观察到以前未知的临床重要的腺病毒载体衣壳,血小板因子4和CAR之间的相互作用。从黑猩猩腺病毒Y25(ChAdOx 1)、人腺病毒26型(HAdV-D26)和人腺病毒5型(HAdV-C5)衍生的疫苗在对抗严重急性呼吸道冠状病毒2(SARS-CoV-2)大流行中至关重要。作为历史上最大规模疫苗接种活动的一部分,在3期试验中未观察到超罕见的副作用,包括血栓形成伴血小板减少综合征(TTS),这是一种类似肝素诱导的血小板减少症(HIT)的罕见疾病。这项研究表明,所有三种腺病毒部署作为疫苗接种载体与SARS-CoV-2结合血小板因子4(PF 4),一种蛋白质参与HIT的发病机制。我们已经确定了ChAdOx 1病毒载体的结构,并将其用于最先进的计算模拟,以证明与PF 4的静电相互作用机制,这是通过表面等离子体共振实验证实的。这些数据证实了PF 4能够与临床相关的腺病毒形成稳定的复合物,这是解开TTS潜在机制的重要一步。
We observe previously unknown interactions between clinically important adenovirus vector capsids, platelet factor 4, and CAR. Vaccines derived from chimpanzee adenovirus Y25 (ChAdOx1), human adenovirus type 26 (HAdV-D26), and human adenovirus type 5 (HAdV-C5) are critical in combatting the severe acute respiratory coronavirus 2 (SARS-CoV-2) pandemic. As part of the largest vaccination campaign in history, ultrarare side effects not seen in phase 3 trials, including thrombosis with thrombocytopenia syndrome (TTS), a rare condition resembling heparin-induced thrombocytopenia (HIT), have been observed. This study demonstrates that all three adenoviruses deployed as vaccination vectors versus SARS-CoV-2 bind to platelet factor 4 (PF4), a protein implicated in the pathogenesis of HIT. We have determined the structure of the ChAdOx1 viral vector and used it in state-of-the-art computational simulations to demonstrate an electrostatic interaction mechanism with PF4, which was confirmed experimentally by surface plasmon resonance. These data confirm that PF4 is capable of forming stable complexes with clinically relevant adenoviruses, an important step in unraveling the mechanisms underlying TTS.
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