Activation of coagulation and proinflammatory pathways in thrombosis with thrombocytopenia syndrome and following COVID-19 vaccination

Malika Aid, Kathryn E. Stephenson, Ai-ris Y. Collier, Joseph P. Nkolola, James V. Michael, Steven E. McKenzie and Dan H. Barouch ()
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Malika Aid: Beth Israel Deaconess Medical Center, Harvard Medical School
Kathryn E. Stephenson: Beth Israel Deaconess Medical Center, Harvard Medical School
Ai-ris Y. Collier: Beth Israel Deaconess Medical Center, Harvard Medical School
Joseph P. Nkolola: Beth Israel Deaconess Medical Center, Harvard Medical School
James V. Michael: Thomas Jefferson University
Steven E. McKenzie: Thomas Jefferson University
Dan H. Barouch: Beth Israel Deaconess Medical Center, Harvard Medical School

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Thrombosis with thrombocytopenia syndrome (TTS) is a rare but potentially severe adverse event following immunization with adenovirus vector-based COVID-19 vaccines such as Ad26.COV2.S (Janssen) and ChAdOx1 (AstraZeneca). However, no case of TTS has been reported in over 1.5 million individuals who received a second immunization with Ad26.COV2.S in the United States. Here we utilize transcriptomic and proteomic profiling to compare individuals who receive two doses of Ad26.COV2.S with those vaccinated with BNT162b2 or mRNA-1273. Initial Ad26.COV2.S vaccination induces transient activation of platelet and coagulation and innate immune pathways that resolve by day 7; by contrast, patients with TTS show robust upregulation of these pathways on days 15–19 following initial Ad26.COV2.S vaccination. Meanwhile, a second immunization or a reduced initial dose of Ad26.COV2.S induces lower activation of these pathways than does the full initial dose. Our data suggest a role of coagulation and proinflammatory pathways in TTS pathogenesis, which may help optimize vaccination regimens to reduce TTS risk.

Date: 2023
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DOI: 10.1038/s41467-023-42559-x

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