Abstract

Rare cases of thrombosis with thrombocytopenia syndrome (TTS) have been reported after AZD1222. Anti-platelet factor-4 (PF4) antibodies were observed in patients following presentation of TTS, however it is unclear if AZD1222 was responsible for inducing production of anti-PF4. Paired samples (baseline and day-15) from a phase 3 trial of AZD1222 vs placebo were analyzed for anti-PF4 levels; 19/1727 (1.1%, AZD1222) vs 7/857 (0.8%, placebo) participants were anti-PF4-IgG-negative at baseline but had moderate Day-15 levels (P = 0.676) and 0/35 and 1/20 (5.0%) had moderate levels at baseline but high Day-15 levels. These data indicate that AZD1222 does not induce a clinically relevant general increase in anti-PF4 IgG.

Details

Title
Serum levels of anti-PF4 IgG after AZD1222 (ChAdOx1 nCoV-19) vaccination
Author
Cohen, Taylor S 1 ; Kelly, Elizabeth J 2 ; Nylander Sven 3 ; Bansal Himanshu 4 ; Jepson, Brett M 4 ; Bhuyan Prakash 5 ; Sobieszczyk, Magdalena E 6 ; Falsey, Ann R 7 

 BioPharmaceuticals R&D, AstraZeneca, Microbiome Discovery, Vaccines and Immune Therapies, Gaithersburg, USA (GRID:grid.418152.b) (ISNI:0000 0004 0543 9493) 
 BioPharmaceuticals R&D, AstraZeneca, Translational Medicine, Vaccines and Immune Therapies, Gaithersburg, USA (GRID:grid.418152.b) (ISNI:0000 0004 0543 9493) 
 Biopharmaceuticals R&D, AstraZeneca, Clinical Development, Vaccines and Immune Therapies, Gothenburg, Sweden (GRID:grid.418151.8) (ISNI:0000 0001 1519 6403) 
 BioPharmaceuticals R&D, AstraZeneca, Biometrics, Vaccines and Immune Therapies, Gaithersburg, USA (GRID:grid.418152.b) (ISNI:0000 0004 0543 9493) 
 BioPharmaceuticals R&D, AstraZeneca, Vaccines and Immune Therapies, Gaithersburg, USA (GRID:grid.418152.b) (ISNI:0000 0004 0543 9493) 
 Columbia University Irving Medical Center and New York-Presbyterian Hospital, Division of Infectious Diseases, Department of Medicine, New York, USA (GRID:grid.413734.6) (ISNI:0000 0000 8499 1112) 
 University of Rochester Medical Center, Rochester, USA (GRID:grid.412750.5) (ISNI:0000 0004 1936 9166) 
Publication year
2022
Publication date
2022
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2663854196
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.