Interleukin-1? Mediates Arterial Thrombus Formation via NET-Associated Tissue Factor.

ABSTRACT: CANTOS reported reduced secondary atherothrombotic events in patients with residual inflammatory risk treated with the inhibitory anti-IL-1? antibody, Canakinumab. Yet, mechanisms that underlie this benefit remain elusive. Recent work has implicated formation of neutrophil extracellular traps (NETosis) in arterial thrombosis. Hence, the present study explored the potential link between IL-1?, NETs, and tissue factor (TF)-the key trigger of the coagulation cascade-in atherothrombosis. To this end, ST-elevation myocardial infarction (STEMI) patients from the Swiss multicenter trial SPUM-ACS were retrospectively and randomly selected based on their CRP levels. In particular, 33 patients with STEMI and high C-reactive protein (CRP) levels (? 10 mg/L) and, 33 with STEMI and low CRP levels (? 4 mg/L) were investigated. High CRP patients displayed elevated circulating IL-1?, NETosis, and NET-associated TF plasma levels compared with low CRP ones. Additionally, analysis of patients stratified by circulating IL-1? levels yielded similar results. Moreover, NETosis and NET-associated TF plasma levels correlated positively in the whole population. In addition to the above, translational research experiments provided mechanistic confirmation for the clinical data identifying IL-1? as the initial trigger for the release of the pro-coagulant, NET-associated TF. In conclusion, blunted TF presentation by activated neutrophils undergoing NETosis may provide a mechanistic explanation to reduced secondary atherothrombotic events as observed in canakinumab-treated patients in CANTOS.

SUBMITTER: Liberale L 

PROVIDER: S-EPMC6947515 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature